content
stringlengths 1
1.04M
⌀ |
|---|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
package body badger is
end package body;
package body badger2 is
end package body badger2;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity accumulator is port (
a: in std_logic_vector(3 downto 0);
clk, reset: in std_logic;
accum: out std_logic_vector(3 downto 0)
);
end accumulator;
architecture simple of accumulator is
signal accumL: unsigned(3 downto 0);
begin
accumulate: process (clk, reset) begin
if (reset = '1') then
accumL <= "0000";
elsif (clk'event and clk= '1') then
accumL <= accumL + to_unsigned(a);
end if;
end process;
accum <= std_logic_vector(accumL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity adder is port (
a,b : in std_logic_vector (15 downto 0);
sum: out std_logic_vector (15 downto 0)
);
end adder;
architecture dataflow of adder is
begin
sum <= a + b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity pAdderAttr is
generic(n : integer := 8);
port (a : in std_logic_vector(n - 1 downto 0);
b : in std_logic_vector(n - 1 downto 0);
cin : in std_logic;
sum : out std_logic_vector(n - 1 downto 0);
cout : out std_logic);
end pAdderAttr;
architecture loopDemo of pAdderAttr is
begin
process(a, b, cin)
variable carry: std_logic_vector(sum'length downto 0);
variable localSum: std_logic_vector(sum'high downto 0);
begin
carry(0) := cin;
for i in sum'reverse_range loop
localSum(i) := (a(i) xor b(i)) xor carry(i);
carry(i + 1) := (a(i) and b(i)) or (carry(i) and (a(i) or b(i)));
end loop;
sum <= localSum;
cout <= carry(carry'high - 1);
end process;
end loopDemo;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in unsigned(3 downto 0);
sum: out unsigned(3 downto 0)
);
end adder;
architecture simple of adder is
begin
sum <= a + b;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity asyncLoad is port (
loadVal, d: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLoad;
architecture rtl of asyncLoad is
begin
process (clk, load, loadVal) begin
if (load = '1') then
q <= loadVal;
elsif (clk'event and clk = '1' ) then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity BidirBuf is port (
OE: in std_logic;
input: in std_logic_vector;
output: out std_logic_vector
);
end BidirBuf;
architecture behavioral of BidirBuf is
begin
bidirBuf: process (OE, input) begin
if (OE = '1') then
output <= input;
else
output <= (others => 'Z');
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BidirCnt is port (
OE: in std_logic;
CntEnable: in std_logic;
LdCnt: in std_logic;
Clk: in std_logic;
Rst: in std_logic;
Cnt: inout std_logic_vector(3 downto 0)
);
end BidirCnt;
architecture behavioral of BidirCnt is
component LoadCnt port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end component;
component BidirBuf port (
OE: in std_logic;
input: in std_logic_vector;
output: inout std_logic_vector
);
end component;
signal CntVal: std_logic_vector(3 downto 0);
signal LoadVal: std_logic_vector(3 downto 0);
begin
u1: loadcnt port map (CntEn => CntEnable,
LdCnt => LdCnt,
LdData => LoadVal,
Clk => Clk,
Rst => Rst,
CntVal => CntVal
);
u2: bidirbuf port map (OE => oe,
input => CntVal,
output => Cnt
);
LoadVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity bidirbuffer is port (
input: in std_logic;
enable: in std_logic;
feedback: out std_logic;
output: inout std_logic
);
end bidirbuffer;
architecture structural of bidirbuffer is
begin
u1: bidir port map (ip => input,
oe => enable,
op_fb => feedback,
op => output
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity clkGen is port (
clk: in std_logic;
reset: in std_logic;
ClkDiv2, ClkDiv4,
ClkDiv6,ClkDiv8: out std_logic
);
end clkGen;
architecture behav of clkGen is
subtype numClks is std_logic_vector(1 to 4);
subtype numPatterns is integer range 0 to 11;
type clkTableType is array (numpatterns'low to numPatterns'high) of numClks;
constant clkTable: clkTableType := clkTableType'(
-- ClkDiv8______
-- ClkDiv6_____ |
-- ClkDiv4____ ||
-- ClkDiv2 __ |||
-- ||||
"1111",
"0111",
"1011",
"0001",
"1100",
"0100",
"1010",
"0010",
"1111",
"0001",
"1001",
"0101");
signal index: numPatterns;
begin
lookupTable: process (clk, reset) begin
if reset = '1' then
index <= 0;
elsif (clk'event and clk = '1') then
if index = numPatterns'high then
index <= numPatterns'low;
else
index <= index + 1;
end if;
end if;
end process;
(ClkDiv2,ClkDiv4,ClkDiv6,ClkDiv8) <= clkTable(index);
end behav;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
enable: in std_logic;
reset: in std_logic;
count: buffer unsigned(3 downto 0)
);
end counter;
architecture simple of counter is
begin
increment: process (clk, reset) begin
if reset = '1' then
count <= "0000";
elsif(clk'event and clk = '1') then
if enable = '1' then
count <= count + 1;
else
count <= count;
end if;
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.scaleable.all;
entity count8 is port (
clk: in std_logic;
rst: in std_logic;
count: out std_logic_vector(7 downto 0)
);
end count8;
architecture structural of count8 is
begin
u1: scaleUpCnt port map (clk => clk,
reset => rst,
cnt => count
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 9)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 9);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(3,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(9 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(9 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= to_unsigned(0,10);
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
enable: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
elsif (enable = '1') then
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
load: in std_logic;
data: in std_logic_vector(3 downto 0);
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
if (load = '1') then
countL <= to_unsigned(data);
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity Cnt4Term is port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic
);
end Cnt4Term;
architecture behavioral of Cnt4Term is
signal CntL: unsigned(3 downto 0);
begin
increment: process begin
wait until clk = '1';
CntL <= CntL + 1;
end process;
Cnt <= to_stdlogicvector(CntL);
TermCnt <= '1' when CntL = "1111" else '0';
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity Counter is port (
clock: in std_logic;
Count: out std_logic_vector(3 downto 0)
);
end Counter;
architecture structural of Counter is
component Cnt4Term port (
clk: in std_logic;
Cnt: out std_logic_vector(3 downto 0);
TermCnt: out std_logic);
end component;
begin
u1: Cnt4Term port map (clk => clock,
Cnt => Count,
TermCnt => open
);
end structural;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if(clk'event and clk = '1') then
if (reset = '1') then
countL <= "0000";
else
countL <= countL + 1;
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity convertArith is port (
truncate: out unsigned(3 downto 0);
extend: out unsigned(15 downto 0);
direction: out unsigned(0 to 7)
);
end convertArith;
architecture simple of convertArith is
constant Const: unsigned(7 downto 0) := "00111010";
begin
truncate <= resize(Const, truncate'length);
extend <= resize(Const, extend'length);
direction <= resize(Const, direction'length);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
constant THREE: std_logic_vector(1 downto 0) := "11";
begin
y <= '1' when (a & b = THREE) or (c & d /= THREE) else '0';
end concurrent;
-- incorporates Errata 12.1
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity typeConvert is port (
a: out unsigned(7 downto 0)
);
end typeConvert;
architecture simple of typeConvert is
constant Const: natural := 43;
begin
a <= To_unsigned(Const,8);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk) begin
if (clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(0 to 3)
);
end counter;
architecture simple of counter is
signal countL: unsigned(0 to 3);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "0000";
elsif(clk'event and clk = '1') then
countL <= countL + "001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if reset = '1' then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + 1;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity counter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end counter;
architecture simple of counter is
signal countL: unsigned(3 downto 0);
begin
increment: process (clk, reset) begin
if (reset = '1') then
countL <= "1001";
elsif(clk'event and clk = '1') then
countL <= countL + "0001";
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
use work.decProcs.all;
entity decoder is port (
decIn: in std_logic_vector(1 downto 0);
decOut: out std_logic_vector(3 downto 0)
);
end decoder;
architecture simple of decoder is
begin
DEC2x4(decIn,decOut);
end simple;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
decOut_n: out std_logic_vector(5 downto 0)
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
alias sio_dec_n: std_logic is decOut_n(5);
alias rst_ctrl_rd_n: std_logic is decOut_n(4);
alias atc_stat_rd_n: std_logic is decOut_n(3);
alias mgmt_stat_rd_n: std_logic is decOut_n(2);
alias io_int_stat_rd_n: std_logic is decOut_n(1);
alias int_ctrl_rd_n: std_logic is decOut_n(0);
alias upper: std_logic_vector(2 downto 0) is dev_adr(19 downto 17);
alias CtrlBits: std_logic_vector(16 downto 0) is dev_adr(16 downto 0);
begin
decoder: process (upper, CtrlBits)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case upper is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case CtrlBits is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
sio_dec_n <= '0' when dev_adr (19 downto 17) = SuperIORange else '1';
int_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IntCtrlReg) else '1';
io_int_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = IoIntStatReg) else '1';
rst_ctrl_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = RstCtrlReg) else '1';
atc_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = AtcStatusReg) else '1';
mgmt_stat_rd_n <= '0' when (dev_adr (19 downto 17) = CtrlRegRange)
and (dev_adr(16 downto 0) = MgmtStatusReg) else '1';
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process (dev_adr, cs0_n)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
case dev_adr(19 downto 17) is
when SuperIoRange =>
sio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
int_ctrl_rd_n <= '0';
when IoIntStatReg =>
io_int_stat_rd_n <= '0';
when RstCtrlReg =>
rst_ctrl_rd_n <= '0';
when AtcStatusReg =>
atc_stat_rd_n <= '0';
when MgmtStatusReg =>
mgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
else
null;
end if;
end process decoder;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
cs0_n: in std_logic;
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
signal Lsio_dec_n: std_logic;
signal Lrst_ctrl_rd_n: std_logic;
signal Latc_stat_rd_n: std_logic;
signal Lmgmt_stat_rd_n: std_logic;
signal Lio_int_stat_rd_n: std_logic;
signal Lint_ctrl_rd_n: std_logic;
begin
decoder: process (dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
Lsio_dec_n <= '1';
Lint_ctrl_rd_n <= '1';
Lio_int_stat_rd_n <= '1';
Lrst_ctrl_rd_n <= '1';
Latc_stat_rd_n <= '1';
Lmgmt_stat_rd_n <= '1';
case dev_adr(19 downto 17) is
when SuperIoRange =>
Lsio_dec_n <= '0';
when CtrlRegRange =>
case dev_adr(16 downto 0) is
when IntCtrlReg =>
Lint_ctrl_rd_n <= '0';
when IoIntStatReg =>
Lio_int_stat_rd_n <= '0';
when RstCtrlReg =>
Lrst_ctrl_rd_n <= '0';
when AtcStatusReg =>
Latc_stat_rd_n <= '0';
when MgmtStatusReg =>
Lmgmt_stat_rd_n <= '0';
when others =>
null;
end case;
when others =>
null;
end case;
end process decoder;
qualify: process (cs0_n) begin
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if (cs0_n = '0') then
sio_dec_n <= Lsio_dec_n;
int_ctrl_rd_n <= Lint_ctrl_rd_n;
io_int_stat_rd_n <= Lio_int_stat_rd_n;
rst_ctrl_rd_n <= Lrst_ctrl_rd_n;
atc_stat_rd_n <= Latc_stat_rd_n;
mgmt_stat_rd_n <= Lmgmt_stat_rd_n;
else
null;
end if;
end process qualify;
end synthesis;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n: out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
decoder: process ( dev_adr)
begin
-- Set defaults for outputs - for synthesis reasons.
sio_dec_n <= '1';
int_ctrl_rd_n <= '1';
io_int_stat_rd_n <= '1';
rst_ctrl_rd_n <= '1';
atc_stat_rd_n <= '1';
mgmt_stat_rd_n <= '1';
if dev_adr(19 downto 17) = SuperIOrange then
sio_dec_n <= '0';
elsif dev_adr(19 downto 17) = CtrlRegrange then
if dev_adr(16 downto 0) = IntCtrlReg then
int_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0)= IoIntStatReg then
io_int_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = RstCtrlReg then
rst_ctrl_rd_n <= '0';
elsif dev_adr(16 downto 0) = AtcStatusReg then
atc_stat_rd_n <= '0';
elsif dev_adr(16 downto 0) = MgmtStatusReg then
mgmt_stat_rd_n <= '0';
else
null;
end if;
else
null;
end if;
end process decoder;
end synthesis;
library IEEE;
use IEEE.std_logic_1164.all;
package decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
);
end decProcs;
package body decProcs is
procedure DEC2x4 (inputs : in std_logic_vector(1 downto 0);
decode: out std_logic_vector(3 downto 0)
) is
begin
case inputs is
when "11" =>
decode := "1000";
when "10" =>
decode := "0100";
when "01" =>
decode := "0010";
when "00" =>
decode := "0001";
when others =>
decode := "0001";
end case;
end DEC2x4;
end decProcs;
library ieee;
use ieee.std_logic_1164.all;
entity isa_dec is port
(
dev_adr: in std_logic_vector(19 downto 0);
sio_dec_n: out std_logic;
rst_ctrl_rd_n: out std_logic;
atc_stat_rd_n: out std_logic;
mgmt_stat_rd_n: out std_logic;
io_int_stat_rd_n:out std_logic;
int_ctrl_rd_n: out std_logic
);
end isa_dec;
architecture synthesis of isa_dec is
constant CtrlRegRange: std_logic_vector(2 downto 0) := "100";
constant SuperIoRange: std_logic_vector(2 downto 0) := "010";
constant IntCtrlReg: std_logic_vector(16 downto 0) := "00000000000000000";
constant IoIntStatReg: std_logic_vector(16 downto 0) := "00000000000000001";
constant RstCtrlReg: std_logic_vector(16 downto 0) := "00000000000000010";
constant AtcStatusReg: std_logic_vector(16 downto 0) := "00000000000000011";
constant MgmtStatusReg:std_logic_vector(16 downto 0) := "00000000000000100";
begin
with dev_adr(19 downto 17) select
sio_dec_n <= '0' when SuperIORange,
'1' when others;
with dev_adr(19 downto 0) select
int_ctrl_rd_n <= '0' when CtrlRegRange & IntCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
io_int_stat_rd_n <= '0' when CtrlRegRange & IoIntStatReg,
'1' when others;
with dev_adr(19 downto 0) select
rst_ctrl_rd_n <= '0' when CtrlRegRange & RstCtrlReg,
'1' when others;
with dev_adr(19 downto 0) select
atc_stat_rd_n <= '0' when CtrlRegRange & AtcStatusReg,
'1' when others;
with dev_adr(19 downto 0) select
mgmt_stat_rd_n <= '0' when CtrlRegRange & MgmtStatusReg,
'1' when others;
end synthesis;
-- Incorporates Errata 5.1 and 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal delayCnt, pulseCnt: unsigned(7 downto 0);
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
begin
delayReg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadLength = '1' then -- changed loadLength to loadDelay (Errata 5.1)
pulseCntVal <= unsigned(data);
end if;
end if;
end process;
pulseDelay: process (clk, reset) begin
if (reset = '1') then
delayCnt <= "11111111";
elsif(clk'event and clk = '1') then
if (loadDelay = '1' or loadLength = '1' or endPulse = '1') then -- changed startPulse to endPulse (Errata 5.1)
delayCnt <= delayCntVal;
elsif endPulse = '1' then
delayCnt <= delayCnt - 1;
end if;
end if;
end process;
startPulse <= '1' when delayCnt = "00000000" else '0';
pulseLength: process (clk, reset) begin
if (reset = '1') then
pulseCnt <= "11111111";
elsif (clk'event and clk = '1') then
if (loadLength = '1') then
pulseCnt <= pulseCntVal;
elsif (startPulse = '1' and endPulse = '1') then
pulseCnt <= pulseCntVal;
elsif (endPulse = '1') then
pulseCnt <= pulseCnt;
else
pulseCnt <= pulseCnt - 1;
end if;
end if;
end process;
endPulse <= '1' when pulseCnt = "00000000" else '0';
pulseOutput: process (clk, reset) begin
if (reset = '1') then
pulse <= '0';
elsif (clk'event and clk = '1') then
if (startPulse = '1') then
pulse <= '1';
elsif (endPulse = '1') then
pulse <= '0';
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst : in std_logic;
q: out std_logic;
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, a,b,c) begin
if ((a = '1' and b = '1') or c = '1') then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
a,b,c : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
signal localRst: std_logic;
begin
localRst <= '1' when (( a = '1' and b = '1') or c = '1') else '0';
process (clk, localRst) begin
if localRst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
arst: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q <= '0';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
aset : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, aset) begin
if aset = '1' then
q <= '1';
elsif clk'event and clk = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
arst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk, arst) begin
if arst = '1' then
q1 <= '0';
q2 <= '1';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
wait on clk;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
envector: in std_logic_vector(7 downto 0);
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if envector = "10010111" then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if en = '1' then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (prst = '1') then
q <= '1';
elsif (rst = '1') then
q <= '0';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity flipFlop is port (
clock, input: in std_logic;
ffOut: out std_logic
);
end flipFlop;
architecture simple of flipFlop is
procedure dff (signal clk: in std_logic;
signal d: in std_logic;
signal q: out std_logic
) is
begin
if clk'event and clk = '1' then
q <= d;
end if;
end procedure dff;
begin
dff(clock, input, ffOut);
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
end: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until rising_edge(clk);
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1, d2: in std_logic;
clk: in std_logic;
srst : in std_logic;
q1, q2: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q1 <= '0';
q2 <= '1';
else
q1 <= d1;
q2 <= d2;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe_sr is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
rst,prst: in std_logic;
q: out std_logic
);
end struct_dffe_sr;
use work.primitive.all;
architecture instance of struct_dffe_sr is
begin
ff: dffe_sr port map (
d => d,
clk => clk,
en => en,
rst => rst,
prst => prst,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
srst : in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
if clk'event and clk = '1' then
if srst = '1' then
q <= '0';
else
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dffe is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dffe;
use work.primitive.all;
architecture instance of struct_dffe is
begin
ff: dffe port map (
d => d,
clk => clk,
en => en,
q => q
);
end instance;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity dffTri is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end dffTri;
architecture parameterize of dffTri is
type tribufType is record
ip: std_logic;
oe: std_logic;
op: std_logic;
end record;
type tribufArrayType is array (integer range <>) of tribufType;
signal tri: tribufArrayType(size - 1 downto 0);
begin
g0: for i in 0 to size - 1 generate
u1: DFFE port map (data(i), tri(i).ip, ff_enable, clock);
end generate;
g1: for i in 0 to size - 1 generate
u2: TRIBUF port map (tri(i).ip, tri(i).oe, tri(i).op);
tri(i).oe <= op_enable;
qout(i) <= tri(i).op;
end generate;
end parameterize;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
en: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic bus
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
signal qLocal: std_logic;
begin
qLocal <= d when en = '1' else qLocal;
q <= qLocal;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en, d) begin
if en = '1' then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity struct_dlatch is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end struct_dlatch;
use work.primitive.all;
architecture instance of struct_dlatch is
begin
latch: dlatchh port map (
d => d,
en => en,
q => q
);
end instance;
-- Incorporates Errata 5.4
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity downCounter is port (
clk: in std_logic;
reset: in std_logic;
count: out std_logic_vector(3 downto 0)
);
end downCounter;
architecture simple of downCounter is
signal countL: unsigned(3 downto 0);
signal termCnt: std_logic;
begin
decrement: process (clk, reset) begin
if (reset = '1') then
countL <= "1011"; -- Reset to 11
termCnt <= '1';
elsif(clk'event and clk = '1') then
if (termCnt = '1') then
countL <= "1011"; -- Count rolls over to 11
else
countL <= countL - 1;
end if;
if (countL = "0001") then -- Terminal count decoded 1 cycle earlier
termCnt <= '1';
else
termCnt <= '0';
end if;
end if;
end process;
count <= std_logic_vector(countL);
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity compareDC is port (
addressBus: in std_logic_vector(31 downto 0);
addressHit: out std_logic
);
end compareDC;
architecture wontWork of compareDC is
begin
compare: process(addressBus) begin
if (addressBus = "011110101011--------------------") then
addressHit <= '1';
else
addressHit <= '0';
end if;
end process compare;
end wontWork;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
encode: process (invec) begin
case invec is
when "00000001" =>
enc_out <= "000";
when "00000010" =>
enc_out <= "001";
when "00000100" =>
enc_out <= "010";
when "00001000" =>
enc_out <= "011";
when "00010000" =>
enc_out <= "100";
when "00100000" =>
enc_out <= "101";
when "01000000" =>
enc_out <= "110";
when "10000000" =>
enc_out <= "111";
when others =>
enc_out <= "000";
end case;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec:in std_logic_vector(7 downto 0);
enc_out:out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
process (invec)
begin
if invec(7) = '1' then
enc_out <= "111";
elsif invec(6) = '1' then
enc_out <= "110";
elsif invec(5) = '1' then
enc_out <= "101";
elsif invec(4) = '1' then
enc_out <= "100";
elsif invec(3) = '1' then
enc_out <= "011";
elsif invec(2) = '1' then
enc_out <= "010";
elsif invec(1) = '1' then
enc_out <= "001";
elsif invec(0) = '1' then
enc_out <= "000";
else
enc_out <= "000";
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity encoder is
port (invec: in std_logic_vector(7 downto 0);
enc_out: out std_logic_vector(2 downto 0)
);
end encoder;
architecture rtl of encoder is
begin
enc_out <= "111" when invec(7) = '1' else
"110" when invec(6) = '1' else
"101" when invec(5) = '1' else
"100" when invec(4) = '1' else
"011" when invec(3) = '1' else
"010" when invec(2) = '1' else
"001" when invec(1) = '1' else
"000" when invec(0) = '1' else
"000";
end rtl;
-- includes Errata 5.2
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all; -- errata 5.2
entity compare is port (
ina: in std_logic_vector (3 downto 0);
inb: in std_logic_vector (2 downto 0);
equal: out std_logic
);
end compare;
architecture simple of compare is
begin
equalProc: process (ina, inb) begin
if (ina = inb ) then
equal <= '1';
else
equal <= '0';
end if;
end process;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture behavioral of LogicFcn is
begin
fcn: process (A,B,C) begin
if (A = '0' and B = '0') then
Y <= '1';
elsif C = '1' then
Y <= '1';
else
Y <= '0';
end if;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture dataflow of LogicFcn is
begin
Y <= '1' when (A = '0' AND B = '0') OR
(C = '1')
else '0';
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity LogicFcn is port (
A: in std_logic;
B: in std_logic;
C: in std_logic;
Y: out std_logic
);
end LogicFcn;
architecture structural of LogicFcn is
signal notA, notB, andSignal: std_logic;
begin
i1: inverter port map (i => A,
o => notA);
i2: inverter port map (i => B,
o => notB);
a1: and2 port map (i1 => notA,
i2 => notB,
y => andSignal);
o1: or2 port map (i1 => andSignal,
i2 => C,
y => Y);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is port (
D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
constant tCQ: time := 8 ns;
constant tS: time := 4 ns;
constant tH: time := 3 ns;
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process (clk) begin
wait until clk = '1';
q <= d;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d: in std_logic;
clk: in std_logic;
q: out std_logic
);
end DFF;
architecture rtl of DFF is
begin
process begin
wait until clk = '1';
q <= d;
wait on clk;
end process;
end rtl;
configuration SimpleGatesCfg of FEWGATES is
for structural
for all: AND2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
configuration SimpleGatesCfg of FEWGATES is
for structural
for u1: and2
use entity work.and2(rtl);
end for;
for u2: and2
use entity work.and2(rtl);
end for;
for u3: inverter
use entity work.inverter(rtl);
end for;
for u4: or2
use entity work.or2(rtl);
end for;
end for;
end SimpleGatesCfg;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.and2;
use work.or2;
use work.inverter;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
-- Configution specifications
for all: and2 use entity work.and2(rtl);
for u3: inverter use entity work.inverter(rtl);
for u4: or2 use entity work.or2(rtl);
begin
u1: and2 port map (i1 => a, i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c, i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b, i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
use work.GatesPkg.all;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture concurrent of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
a_and_b <= '1' when a = '1' and b = '1' else '0';
c_and_d <= '1' when c = '1' and d = '1' else '0';
not_c_and_d <= not c_and_d;
y <= '1' when a_and_b = '1' or not_c_and_d = '1' else '0';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
package GatesPkg is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
end GatesPkg;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 =>c,
i2 => d,
y => c_and_d
);
u3: inverter port map (a => c_and_d,
y => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity FEWGATES is port (
a,b,c,d: in std_logic;
y: out std_logic
);
end FEWGATES;
architecture structural of FEWGATES is
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
signal a_and_b, c_and_d, not_c_and_d: std_logic;
begin
u1: and2 port map (i1 => a ,
i2 => b,
y => a_and_b
);
u2: and2 port map (i1 => c,
i2 => d,
y => c_and_d
);
u3: inverter port map (i => c_and_d,
o => not_c_and_d);
u4: or2 port map (i1 => a_and_b,
i2 => not_c_and_d,
y => y
);
end structural;
library IEEE;
use IEEE.std_logic_1164.all;
use work.simPrimitives.all;
entity simHierarchy is port (
A, B, Clk: in std_logic;
Y: out std_logic
);
end simHierarchy;
architecture hierarchical of simHierarchy is
signal ADly, BDly, OrGateDly, ClkDly: std_logic;
signal OrGate, FlopOut: std_logic;
begin
ADly <= transport A after 2 ns;
BDly <= transport B after 2 ns;
OrGateDly <= transport OrGate after 1.5 ns;
ClkDly <= transport Clk after 1 ns;
u1: OR2 generic map (tPD => 10 ns)
port map ( I1 => ADly,
I2 => BDly,
Y => OrGate
);
u2: simDFF generic map ( tS => 4 ns,
tH => 3 ns,
tCQ => 8 ns
)
port map ( D => OrGateDly,
Clk => ClkDly,
Q => FlopOut
);
Y <= transport FlopOut after 2 ns;
end hierarchical;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
--------------------------------------------------------------------------------
--| File name : $RCSfile: io1164.vhd $
--| Library : SUPPORT
--| Revision : $Revision: 1.1 $
--| Author(s) : Vantage Analysis Systems, Inc; Des Young
--| Integration : Des Young
--| Creation : Nov 1995
--| Status : $State: Exp $
--|
--| Purpose : IO routines for std_logic_1164.
--| Assumptions : Numbers use radixed character set with no prefix.
--| Limitations : Does not read VHDL pound-radixed numbers.
--| Known Errors: none
--|
--| Description:
--| This is a modified library. The source is basically that donated by
--| Vantage to libutil. Des Young removed std_ulogic_vector support (to
--| conform to synthesizable libraries), and added read_oct/hex to integer.
--|
--| =======================================================================
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights
--| reserved. This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package VHDL source
--| Package Name: somelib.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : * Overloads procedures READ and WRITE for STD_LOGIC types
--| in manner consistent with TEXTIO package.
--| * Provides procedures to read and write logic values as
--| binary, octal, or hexadecimal values ('X' as appropriate).
--| These should be particularly useful for models
--| to read in stimulus as 0/1/x or octal or hex.
--| Subprograms :
--| Notes :
--| History : 1. Donated to libutil by Dave Bernstein 15 Jun 94
--| 2. Removed all std_ulogic_vector support, Des Young, 14 Nov 95
--| (This is because that type is not supported for synthesis).
--| 3. Added read_oct/hex to integer, Des Young, 20 Nov 95
--|
--| =======================================================================
--| Extra routines by Des Young, [email protected]. 1995. GNU copyright.
--| =======================================================================
--|
--------------------------------------------------------------------------------
library ieee;
package io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- import std_logic package
use ieee.std_logic_1164.all;
-- import textio package
use std.textio.all;
--
-- the READ and WRITE procedures act similarly to the procedures in the
-- STD.TEXTIO package. for each type, there are two read procedures and
-- one write procedure for converting between character and internal
-- representations of values. each value is represented as the string of
-- characters that you would use in VHDL code. (remember that apostrophes
-- and quotation marks are not used.) input is case-insensitive. output
-- is in upper case. see the following LRM sections for more information:
--
-- 2.3 - Subprogram Overloading
-- 3.3 - Access Types (STD.TEXTIO.LINE is an access type)
-- 7.3.6 - Allocators (allocators create access values)
-- 14.3 - Package TEXTIO
--
-- Note that the procedures for std_ulogic will match calls with the value
-- parameter of type std_logic.
--
-- declare READ procedures to overload like in TEXTIO
--
procedure read(l: inout line; value: out std_ulogic ; good: out boolean);
procedure read(l: inout line; value: out std_ulogic );
procedure read(l: inout line; value: out std_logic_vector ; good: out boolean);
procedure read(l: inout line; value: out std_logic_vector );
--
-- declare WRITE procedures to overload like in TEXTIO
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 );
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 );
--
-- declare procedures to convert between logic values and octal
-- or hexadecimal ('X' where appropriate).
--
-- octal / std_logic_vector
procedure read_oct (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_oct (l : inout line ;
value : out std_logic_vector );
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- hexadecimal / std_logic_vector
procedure read_hex (l : inout line ;
value : out std_logic_vector ;
good : out boolean );
procedure read_hex (l : inout line ;
value : out std_logic_vector );
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified : in side := right;
field : in width := 0 );
-- read a number into an integer
procedure read_oct(l : inout line;
value : out integer;
good : out boolean);
procedure read_oct(l : inout line;
value : out integer);
procedure read_hex(l : inout line;
value : out integer;
good : out boolean);
procedure read_hex(l : inout line;
value : out integer);
end io1164;
--------------------------------------------------------------------------------
--| Copyright (c) 1992-1994 Vantage Analysis Systems, Inc., all rights reserved
--| This package is provided by Vantage Analysis Systems.
--| The package may not be sold without the express written consent of
--| Vantage Analysis Systems, Inc.
--|
--| The VHDL for this package may be copied and/or distributed as long as
--| this copyright notice is retained in the source and any modifications
--| are clearly marked in the History: list.
--|
--| Title : IO1164 package body VHDL source
--| Package Name: VANTAGE_LOGIC.IO1164
--| File Name : io1164.vhdl
--| Author(s) : dbb
--| Purpose : source for IO1164 package body
--| Subprograms :
--| Notes : see package declaration
--| History : see package declaration
--------------------------------------------------------------------------------
package body io1164 is
--$ !VANTAGE_METACOMMENTS_ON
--$ !VANTAGE_DNA_ON
-- define lowercase conversion of characters for canonical comparison
type char2char_t is array (character'low to character'high) of character;
constant lowcase: char2char_t := (
nul, soh, stx, etx, eot, enq, ack, bel,
bs, ht, lf, vt, ff, cr, so, si,
dle, dc1, dc2, dc3, dc4, nak, syn, etb,
can, em, sub, esc, fsp, gsp, rsp, usp,
' ', '!', '"', '#', '$', '%', '&', ''',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '[', '\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', del);
-- define conversions between various types
-- logic -> character
type f_logic_to_character_t is
array (std_ulogic'low to std_ulogic'high) of character;
constant f_logic_to_character : f_logic_to_character_t :=
(
'U' => 'U',
'X' => 'X',
'0' => '0',
'1' => '1',
'Z' => 'Z',
'W' => 'W',
'L' => 'L',
'H' => 'H',
'-' => '-'
);
-- character, integer, logic
constant x_charcode : integer := -1;
constant maxoct_charcode: integer := 7;
constant maxhex_charcode: integer := 15;
constant bad_charcode : integer := integer'left;
type digit2int_t is
array ( character'low to character'high ) of integer;
constant octdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7,
'X' | 'x' => x_charcode, others => bad_charcode );
constant hexdigit2int: digit2int_t := (
'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4,
'5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
'A' | 'a' => 10, 'B' | 'b' => 11, 'C' | 'c' => 12,
'D' | 'd' => 13, 'E' | 'e' => 14, 'F' | 'f' => 15,
'X' | 'x' => x_charcode, others => bad_charcode );
constant oct_bits_per_digit: integer := 3;
constant hex_bits_per_digit: integer := 4;
type int2octdigit_t is
array ( 0 to maxoct_charcode ) of character;
constant int2octdigit: int2octdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7' );
type int2hexdigit_t is
array ( 0 to maxhex_charcode ) of character;
constant int2hexdigit: int2hexdigit_t :=
( 0 => '0', 1 => '1', 2 => '2', 3 => '3',
4 => '4', 5 => '5', 6 => '6', 7 => '7',
8 => '8', 9 => '9', 10 => 'A', 11 => 'B',
12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F' );
type oct_logic_vector_t is
array(1 to oct_bits_per_digit) of std_ulogic;
type octint2logic_t is
array (x_charcode to maxoct_charcode) of oct_logic_vector_t;
constant octint2logic : octint2logic_t := (
( 'X', 'X', 'X' ),
( '0', '0', '0' ),
( '0', '0', '1' ),
( '0', '1', '0' ),
( '0', '1', '1' ),
( '1', '0', '0' ),
( '1', '0', '1' ),
( '1', '1', '0' ),
( '1', '1', '1' )
);
type hex_logic_vector_t is
array(1 to hex_bits_per_digit) of std_ulogic;
type hexint2logic_t is
array (x_charcode to maxhex_charcode) of hex_logic_vector_t;
constant hexint2logic : hexint2logic_t := (
( 'X', 'X', 'X', 'X' ),
( '0', '0', '0', '0' ),
( '0', '0', '0', '1' ),
( '0', '0', '1', '0' ),
( '0', '0', '1', '1' ),
( '0', '1', '0', '0' ),
( '0', '1', '0', '1' ),
( '0', '1', '1', '0' ),
( '0', '1', '1', '1' ),
( '1', '0', '0', '0' ),
( '1', '0', '0', '1' ),
( '1', '0', '1', '0' ),
( '1', '0', '1', '1' ),
( '1', '1', '0', '0' ),
( '1', '1', '0', '1' ),
( '1', '1', '1', '0' ),
( '1', '1', '1', '1' )
);
----------------------------------------------------------------------------
-- READ procedure bodies
--
-- The strategy for duplicating TEXTIO's overloading of procedures
-- with and without GOOD parameters is to put all the logic in the
-- version with the GOOD parameter and to have the version without
-- GOOD approximate a runtime error by use of an assertion.
--
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure read( l: inout line; value: out std_ulogic; good : out boolean ) is
variable c : character; -- char read while looping
variable m : line; -- safe copy of L
variable success: boolean := false; -- readable version of GOOD
variable done : boolean := false; -- flag to say done reading chars
begin
--
-- algorithm:
--
-- if there are characters in the line
-- save a copy of the line
-- get the next character
-- if got one
-- set value
-- if all ok
-- free temp copy
-- else
-- free passed in line
-- assign copy back to line
-- set GOOD
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- grab the next character
read( l, c, success );
-- if read ok
if success then
--
-- an issue here is whether lower-case values should be accepted or not
--
-- determine the value
case c is
when 'U' | 'u' => value := 'U';
when 'X' | 'x' => value := 'X';
when '0' => value := '0';
when '1' => value := '1';
when 'Z' | 'z' => value := 'Z';
when 'W' | 'w' => value := 'W';
when 'L' | 'l' => value := 'L';
when 'H' | 'h' => value := 'H';
when '-' => value := '-';
when others => success := false;
end case;
end if;
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
end if; -- non null access, non empty string
-- set output parameter
good := success;
end read;
procedure read( l: inout line; value: out std_ulogic ) is
variable success: boolean; -- internal good flag
begin
read( l, value, success ); -- use safe version
assert success
report "IO1164.READ: Unable to read STD_ULOGIC value."
severity error;
end read;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure read(l : inout line ;
value: out std_logic_vector;
good : out boolean ) is
variable m : line ; -- saved copy of L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- value for one array element
variable c : character ; -- read a character
begin
--
-- algorithm:
--
-- this procedure strips off leading whitespace, and then calls the
-- READ procedure for each single logic value element in the output
-- array.
--
-- only operate on lines that contain characters
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save a copy of string in case read fails
m := new string'( l.all );
-- loop for each element in output array
for i in value'range loop
-- prohibit internal blanks
if i /= value'left then
if l.all'length = 0 then
success := false;
exit;
end if;
c := l.all(l.all'left);
if c = ' ' or c = ht then
success := false;
exit;
end if;
end if;
-- read the next logic value
read( l, logic_value, success );
-- stuff the value in if ok, else bail out
if success then
value( i ) := logic_value;
else
exit;
end if;
end loop; -- each element in output array
-- free working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
elsif ( value'length /= 0 ) then
-- string is empty but the return array has 1+ elements
success := false;
end if;
-- set output parameter
good := success;
end read;
procedure read(l: inout line; value: out std_logic_vector ) is
variable success: boolean;
begin
read( l, value, success );
assert success
report "IO1164.READ: Unable to read T_WLOGIC_VECTOR value."
severity error;
end read;
----------------------------------------------------------------------------
-- WRITE procedure bodies
----------------------------------------------------------------------------
--
-- std_ulogic
-- note: compatible with std_logic
--
procedure write(l : inout line ;
value : in std_ulogic ;
justified: in side := right;
field : in width := 0 ) is
begin
--
-- algorithm:
--
-- just write out the string associated with the enumerated
-- value.
--
case value is
when 'U' => write( l, character'('U'), justified, field );
when 'X' => write( l, character'('X'), justified, field );
when '0' => write( l, character'('0'), justified, field );
when '1' => write( l, character'('1'), justified, field );
when 'Z' => write( l, character'('Z'), justified, field );
when 'W' => write( l, character'('W'), justified, field );
when 'L' => write( l, character'('L'), justified, field );
when 'H' => write( l, character'('H'), justified, field );
when '-' => write( l, character'('-'), justified, field );
end case;
end write;
--
-- std_logic_vector
-- note: NOT compatible with std_ulogic_vector
--
procedure write(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m: line; -- build up intermediate string
begin
--
-- algorithm:
--
-- for each value in array
-- add string representing value to intermediate string
-- write intermediate string to line parameter
-- free intermediate string
--
-- for each value in array
for i in value'range loop
-- add string representing value to intermediate string
write( m, value( i ) );
end loop;
-- write intermediate string to line parameter
write( l, m.all, justified, field );
-- free intermediate string
deallocate( m );
end write;
--------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- procedure bodies for octal and hexadecimal read and write
----------------------------------------------------------------------------
--
-- std_logic_vector/octal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_oct(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable oct_logic_vector: oct_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem oct_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := octdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
oct_logic_vector := octint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := oct_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = oct_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := octdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
oct_logic_vector := octint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_oct;
procedure read_oct(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_oct;
procedure write_oct(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem oct_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_OCT: VALUE'Length is not a multiple of 3."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / oct_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = oct_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2octdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_oct;
--
-- std_logic_vector/hexadecimal
-- note: NOT compatible with std_ulogic_vector
--
procedure read_hex(l : inout line ;
value : out std_logic_vector;
good : out boolean ) is
variable m : line ; -- safe L
variable success : boolean := true; -- readable GOOD
variable logic_value : std_logic ; -- elem value
variable c : character ; -- char read
variable charcode : integer ; -- char->int
variable hex_logic_vector: hex_logic_vector_t ; -- for 1 digit
variable bitpos : integer ; -- in state vec.
begin
--
-- algorithm:
--
-- skip over leading blanks, then read a digit
-- and do a conversion into a logic value
-- for each element in array
--
-- make sure logic array is right size to read this base
success := ( ( value'length rem hex_bits_per_digit ) = 0 );
if success then
-- only operate on non-empty strings
if ( ( l /= null ) and ( l.all'length /= 0 ) ) then
-- save old copy of string in case read fails
m := new string'( l.all );
-- pick off leading white space and get first significant char
c := ' ';
while success and ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = ht ) ) loop
read( l, c, success );
end loop;
-- turn character into integer
charcode := hexdigit2int( c );
-- not doing any bits yet
bitpos := 0;
-- check for bad first character
if charcode = bad_charcode then
success := false;
else
-- loop through each value in array
hex_logic_vector := hexint2logic( charcode );
for i in value'range loop
-- doing the next bit
bitpos := bitpos + 1;
-- stick the value in
value( i ) := hex_logic_vector( bitpos );
-- read the next character if we're not at array end
if ( bitpos = hex_bits_per_digit ) and ( i /= value'right ) then
read( l, c, success );
if not success then
exit;
end if;
-- turn character into integer
charcode := hexdigit2int( c );
-- check for bad char
if charcode = bad_charcode then
success := false;
exit;
end if;
-- reset bit position
bitpos := 0;
-- turn character code into state array
hex_logic_vector := hexint2logic( charcode );
end if;
end loop; -- each index in return array
end if; -- if bad first character
-- clean up working storage
if success then
deallocate( m );
else
deallocate( l );
l := m;
end if;
-- no characters to read for return array that isn't null slice
elsif ( value'length /= 0 ) then
success := false;
end if; -- non null access, non empty string
end if;
-- set out parameter of success
good := success;
end read_hex;
procedure read_hex(l : inout line ;
value : out std_logic_vector) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read T_LOGIC_VECTOR value."
severity error;
end read_hex;
procedure write_hex(l : inout line ;
value : in std_logic_vector ;
justified: in side := right;
field : in width := 0 ) is
variable m : line ; -- safe copy of L
variable goodlength : boolean ; -- array is ok len for this base
variable isx : boolean ; -- an X in this digit
variable integer_value: integer ; -- accumulate integer value
variable c : character; -- character read
variable charpos : integer ; -- index string being contructed
variable bitpos : integer ; -- bit index inside digit
begin
--
-- algorithm:
--
-- make sure this array can be written in this base
-- create a string to place intermediate results
-- initialize counters and flags to beginning of string
-- for each item in array
-- note unknown, else accumulate logic into integer
-- if at this digit's last bit
-- stuff digit just computed into intermediate result
-- reset flags and counters except for charpos
-- write intermediate result into line
-- free work storage
--
-- make sure this array can be written in this base
goodlength := ( ( value'length rem hex_bits_per_digit ) = 0 );
assert goodlength
report "IO1164.WRITE_HEX: VALUE'Length is not a multiple of 4."
severity error;
if goodlength then
-- create a string to place intermediate results
m := new string(1 to ( value'length / hex_bits_per_digit ) );
-- initialize counters and flags to beginning of string
charpos := 0;
bitpos := 0;
isx := false;
integer_value := 0;
-- for each item in array
for i in value'range loop
-- note unknown, else accumulate logic into integer
case value(i) is
when '0' | 'L' =>
integer_value := integer_value * 2;
when '1' | 'H' =>
integer_value := ( integer_value * 2 ) + 1;
when others =>
isx := true;
end case;
-- see if we've done this digit's last bit
bitpos := bitpos + 1;
if bitpos = hex_bits_per_digit then
-- stuff the digit just computed into the intermediate result
charpos := charpos + 1;
if isx then
m.all(charpos) := 'X';
else
m.all(charpos) := int2hexdigit( integer_value );
end if;
-- reset flags and counters except for location in string being constructed
bitpos := 0;
isx := false;
integer_value := 0;
end if;
end loop;
-- write intermediate result into line
write( l, m.all, justified, field );
-- free work storage
deallocate( m );
end if;
end write_hex;
------------------------------------------------------------------------------
------------------------------------
-- Read octal/hex numbers to integer
------------------------------------
--
-- Read octal to integer
--
procedure read_oct(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := octdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := octdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 8) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_oct;
-- simple version
procedure read_oct(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_oct( l, value, success ); -- use safe version
assert success
report "IO1164.READ_OCT: Unable to read octal integer value."
severity error;
end read_oct;
--
-- Read hex to integer
--
procedure read_hex(l : inout line;
value : out integer;
good : out boolean) is
variable pos : integer;
variable digit : integer;
variable result : integer := 0;
variable success : boolean := true;
variable c : character;
variable old_l : line := l;
begin
-- algorithm:
--
-- skip leading white space, read digit, convert
-- into integer
--
if (l /= NULL) then
-- set pos to start of actual number by skipping white space
pos := l'LEFT;
c := l(pos);
while ( l.all'length > 0 ) and ( ( c = ' ' ) or ( c = HT ) ) loop
pos := pos + 1;
c := l(pos);
end loop;
-- check for start of valid number
digit := hexdigit2int(l(pos));
if ((digit = bad_charcode) or (digit = x_charcode)) then
good := FALSE;
return;
else
-- calculate integer value
for i in pos to l'RIGHT loop
digit := hexdigit2int(l(pos));
exit when (digit = bad_charcode) or (digit = x_charcode);
result := (result * 16) + digit;
pos := pos + 1;
end loop;
value := result;
-- shrink line
if (pos > 1) then
l := new string'(old_l(pos to old_l'HIGH));
deallocate(old_l);
end if;
good := TRUE;
return;
end if;
else
good := FALSE;
end if;
end read_hex;
-- simple version
procedure read_hex(l : inout line;
value : out integer) is
variable success: boolean; -- internal good flag
begin
read_hex( l, value, success ); -- use safe version
assert success
report "IO1164.READ_HEX: Unable to read hex integer value."
severity error;
end read_hex;
end io1164;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity asyncLdCnt is port (
loadVal: in std_logic_vector(3 downto 0);
clk, load: in std_logic;
q: out std_logic_vector(3 downto 0)
);
end asyncLdCnt;
architecture rtl of asyncLdCnt is
signal qLocal: unsigned(3 downto 0);
begin
process (clk, load, loadVal) begin
if (load = '1') then
qLocal <= to_unsigned(loadVal);
elsif (clk'event and clk = '1' ) then
qLocal <= qLocal + 1;
end if;
end process;
q <= to_stdlogicvector(qLocal);
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity LoadCnt is port (
CntEn: in std_logic;
LdCnt: in std_logic;
LdData: in std_logic_vector(3 downto 0);
Clk: in std_logic;
Rst: in std_logic;
CntVal: out std_logic_vector(3 downto 0)
);
end LoadCnt;
architecture behavioral of LoadCnt is
signal Cnt: std_logic_vector(3 downto 0);
begin
counter: process (Clk, Rst) begin
if Rst = '1' then
Cnt <= (others => '0');
elsif (Clk'event and Clk = '1') then
if (LdCnt = '1') then
Cnt <= LdData;
elsif (CntEn = '1') then
Cnt <= Cnt + 1;
else
Cnt <= Cnt;
end if;
end if;
end process;
CntVal <= Cnt;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
library UTILS;
use UTILS.io1164.all;
use std.textio.all;
entity loadCntTB is
end loadCntTB;
architecture testbench of loadCntTB is
component loadCnt port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end component;
file vectorFile: text is in "vectorfile";
type vectorType is record
data: std_logic_vector(7 downto 0);
load: std_logic;
rst: std_logic;
q: std_logic_vector(7 downto 0);
end record;
signal testVector: vectorType;
signal TestClk: std_logic := '0';
signal Qout: std_logic_vector(7 downto 0);
constant ClkPeriod: time := 100 ns;
for all: loadCnt use entity work.loadcnt(rtl);
begin
-- File reading and stimulus application
readVec: process
variable VectorLine: line;
variable VectorValid: boolean;
variable vRst: std_logic;
variable vLoad: std_logic;
variable vData: std_logic_vector(7 downto 0);
variable vQ: std_logic_vector(7 downto 0);
begin
while not endfile (vectorFile) loop
readline(vectorFile, VectorLine);
read(VectorLine, vRst, good => VectorValid);
next when not VectorValid;
read(VectorLine, vLoad);
read(VectorLine, vData);
read(VectorLine, vQ);
wait for ClkPeriod/4;
testVector.Rst <= vRst;
testVector.Load <= vLoad;
testVector.Data <= vData;
testVector.Q <= vQ;
wait for (ClkPeriod/4) * 3;
end loop;
assert false
report "Simulation complete"
severity note;
wait;
end process;
-- Free running test clock
TestClk <= not TestClk after ClkPeriod/2;
-- Instance of design being tested
u1: loadCnt port map (Data => testVector.Data,
load => testVector.Load,
clk => TestClk,
rst => testVector.Rst,
q => Qout
);
-- Process to verify outputs
verify: process (TestClk)
variable ErrorMsg: line;
begin
if (TestClk'event and TestClk = '0') then
if Qout /= testVector.Q then
write(ErrorMsg, string'("Vector failed "));
write(ErrorMsg, now);
writeline(output, ErrorMsg);
end if;
end if;
end process;
end testbench;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity loadCnt is port (
data: in std_logic_vector (7 downto 0);
load: in std_logic;
clk: in std_logic;
rst: in std_logic;
q: out std_logic_vector (7 downto 0)
);
end loadCnt;
architecture rtl of loadCnt is
signal cnt: std_logic_vector (7 downto 0);
begin
counter: process (clk, rst) begin
if (rst = '1') then
cnt <= (others => '0');
elsif (clk'event and clk = '1') then
if (load = '1') then
cnt <= data;
else
cnt <= cnt + 1;
end if;
end if;
end process;
q <= cnt;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity multiplier is port (
a,b : in std_logic_vector (15 downto 0);
product: out std_logic_vector (31 downto 0)
);
end multiplier;
architecture dataflow of multiplier is
begin
product <= a * b;
end dataflow;
library IEEE;
use IEEE.std_logic_1164.all;
entity mux is port (
A, B, Sel: in std_logic;
Y: out std_logic
);
end mux;
architecture simModel of mux is
-- Delay Constants
constant tPD_A: time := 10 ns;
constant tPD_B: time := 15 ns;
constant tPD_Sel: time := 5 ns;
begin
DelayMux: process (A, B, Sel)
variable localY: std_logic; -- Zero delay place holder for Y
begin
-- Zero delay model
case Sel is
when '0' =>
localY := A;
when others =>
localY := B;
end case;
-- Delay calculation
if (B'event) then
Y <= localY after tPD_B;
elsif (A'event) then
Y <= localY after tPD_A;
else
Y <= localY after tPD_Sel;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
begin
if (a + b = "10011010") then
result <= c;
elsif (a + b = "01011001") then
result <= d;
elsif (a + b = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture concurrent of TRIBUF8 is
begin
op <= ip when oe = '1' else (others => 'Z');
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture concurrent of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end concurrent;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF8 is port (
ip: in std_logic_vector(7 downto 0);
oe: in std_logic;
op: out std_logic_vector(7 downto 0)
);
end TRIBUF8;
architecture sequential of TRIBUF8 is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= (others => 'Z');
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in bit;
oe: in bit;
op: out bit
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= null;
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture sequential of TRIBUF is
begin
enable: process (ip,oe) begin
if (oe = '1') then
op <= ip;
else
op <= 'Z';
end if;
end process;
end sequential;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity tribuffer is port (
input: in std_logic;
enable: in std_logic;
output: out std_logic
);
end tribuffer;
architecture structural of tribuffer is
begin
u1: tribuf port map (ip => input,
oe => enable,
op => output
);
end structural;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
begin
genXOR(0) <= '0';
parTree: for i in 1 to ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
entity oddParityLoop is
generic ( width : integer := 8 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityLoop ;
architecture scaleable of oddParityLoop is
begin
process (ad)
variable loopXor: std_logic;
begin
loopXor := '0';
for i in 0 to width -1 loop
loopXor := loopXor xor ad( i ) ;
end loop ;
oddParity <= loopXor ;
end process;
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is port (
I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after 10 ns;
end simple;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity adder is port (
a,b: in std_logic_vector(3 downto 0);
sum: out std_logic_vector(3 downto 0);
overflow: out std_logic
);
end adder;
architecture concat of adder is
signal localSum: std_logic_vector(4 downto 0);
begin
localSum <= std_logic_vector(unsigned('0' & a) + unsigned('0' & b));
sum <= localSum(3 downto 0);
overflow <= localSum(4);
end concat;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity paramDFF is
generic (size: integer := 8);
port (
data: in std_logic_vector(size - 1 downto 0);
clock: in std_logic;
reset: in std_logic;
ff_enable: in std_logic;
op_enable: in std_logic;
qout: out std_logic_vector(size - 1 downto 0)
);
end paramDFF;
architecture parameterize of paramDFF is
signal reg: std_logic_vector(size - 1 downto 0);
begin
u1: pDFFE generic map (n => size)
port map (d => data,
clk =>clock,
rst => reset,
en => ff_enable,
q => reg
);
u2: pTRIBUF generic map (n => size)
port map (ip => reg,
oe => op_enable,
op => qout
);
end paramterize;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 );
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal genXor: std_logic_vector(ad'range);
signal one: std_logic := '1';
begin
parTree: for i in ad'range generate
g0: if i = 0 generate
x0: xor2 port map (i1 => one,
i2 => one,
y => genXor(0)
);
end generate;
g1: if i > 0 and i <= ad'high generate
x1: xor2 port map (i1 => genXor(i - 1),
i2 => ad(i - 1),
y => genXor(i)
);
end generate;
end generate;
oddParity <= genXor(ad'high) ;
end scaleable ;
library ieee;
use ieee.std_logic_1164.all;
use work.primitive.all;
entity oddParityGen is
generic ( width : integer := 32 ); -- (2 <= width <= 32) and a power of 2
port (ad: in std_logic_vector (width - 1 downto 0);
oddParity : out std_logic ) ;
end oddParityGen;
architecture scaleable of oddParityGen is
signal stage0: std_logic_vector(31 downto 0);
signal stage1: std_logic_vector(15 downto 0);
signal stage2: std_logic_vector(7 downto 0);
signal stage3: std_logic_vector(3 downto 0);
signal stage4: std_logic_vector(1 downto 0);
begin
g4: for i in stage4'range generate
g41: if (ad'length > 2) generate
x4: xor2 port map (stage3(i), stage3(i + stage4'length), stage4(i));
end generate;
end generate;
g3: for i in stage3'range generate
g31: if (ad'length > 4) generate
x3: xor2 port map (stage2(i), stage2(i + stage3'length), stage3(i));
end generate;
end generate;
g2: for i in stage2'range generate
g21: if (ad'length > 8) generate
x2: xor2 port map (stage1(i), stage1(i + stage2'length), stage2(i));
end generate;
end generate;
g1: for i in stage1'range generate
g11: if (ad'length > 16) generate
x1: xor2 port map (stage0(i), stage0(i + stage1'length), stage1(i));
end generate;
end generate;
s1: for i in ad'range generate
s14: if (ad'length = 2) generate
stage4(i) <= ad(i);
end generate;
s13: if (ad'length = 4) generate
stage3(i) <= ad(i);
end generate;
s12: if (ad'length = 8) generate
stage2(i) <= ad(i);
end generate;
s11: if (ad'length = 16) generate
stage1(i) <= ad(i);
end generate;
s10: if (ad'length = 32) generate
stage0(i) <= ad(i);
end generate;
end generate;
genPar: xor2 port map (stage4(0), stage4(1), oddParity);
end scaleable ;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in unsigned(3 downto 0);
power : out unsigned(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
signal inputValInt: integer range 0 to 15;
signal powerL: integer range 0 to 65535;
begin
inputValInt <= to_integer(inputVal);
power <= to_unsigned(powerL,16);
process begin
wait until Clk = '1';
powerL <= Pow(inputValInt,4);
end process;
end behavioral;
package PowerPkg is
component Power port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end component;
end PowerPkg;
use work.bv_math.all;
use work.int_math.all;
use work.PowerPkg.all;
entity Power is port(
Clk : in bit;
inputVal : in bit_vector(0 to 3);
power : out bit_vector(0 to 15) );
end Power;
architecture funky of Power is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
Variable i : integer := 0;
begin
while( i < Exp ) loop
Result := Result * N;
i := i + 1;
end loop;
return( Result );
end Pow;
function RollVal( CntlVal : integer ) return integer is
begin
return( Pow( 2, CntlVal ) + 2 );
end RollVal;
begin
process
begin
wait until Clk = '1';
power <= i2bv(Rollval(bv2I(inputVal)),16);
end process;
end funky;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity priority_encoder is port
(interrupts : in std_logic_vector(7 downto 0);
priority : in std_logic_vector(2 downto 0);
result : out std_logic_vector(2 downto 0)
);
end priority_encoder;
architecture behave of priority_encoder is
begin
process (interrupts)
variable selectIn : integer;
variable LoopCount : integer;
begin
LoopCount := 1;
selectIn := to_integer(to_unsigned(priority));
while (LoopCount <= 7) and (interrupts(selectIn) /= '0') loop
if (selectIn = 0) then
selectIn := 7;
else
selectIn := selectIn - 1;
end if;
LoopCount := LoopCount + 1;
end loop;
result <= std_logic_vector(to_unsigned(selectIn,3));
end process;
end behave;
library IEEE;
use IEEE.std_logic_1164.all;
package primitive is
component DFFE port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end component;
component DFFE_SR port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end component;
component DLATCHH port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end component;
component AND2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component OR2 port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end component;
component INVERTER port (
i: in std_logic;
o: out std_logic
);
end component;
component TRIBUF port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end component;
component BIDIR port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end component;
end package;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE is port (
d: in std_logic;
q: out std_logic;
en: in std_logic;
clk: in std_logic
);
end DFFE;
architecture rtl of DFFE is
begin
process begin
wait until clk = '1';
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFFE_SR is port (
d: in std_logic;
en: in std_logic;
clk: in std_logic;
rst: in std_logic;
prst: in std_logic;
q: out std_logic
);
end DFFE_SR;
architecture rtl of DFFE_SR is
begin
process (clk, rst, prst) begin
if (rst = '1') then
q <= '0';
elsif (prst = '1') then
q <= '1';
elsif (clk'event and clk = '1') then
if (en = '1') then
q <= d;
end if;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity DLATCHH is port (
d: in std_logic;
en: in std_logic;
q: out std_logic
);
end DLATCHH;
architecture rtl of DLATCHH is
begin
process (en) begin
if (en = '1') then
q <= d;
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity AND2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end AND2;
architecture rtl of AND2 is
begin
y <= '1' when i1 = '1' and i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity OR2 is port (
i1: in std_logic;
i2: in std_logic;
y: out std_logic
);
end OR2;
architecture rtl of OR2 is
begin
y <= '1' when i1 = '1' or i2 = '1' else '0';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity INVERTER is port (
i: in std_logic;
o: out std_logic
);
end INVERTER;
architecture rtl of INVERTER is
begin
o <= not i;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity TRIBUF is port (
ip: in std_logic;
oe: in std_logic;
op: out std_logic
);
end TRIBUF;
architecture rtl of TRIBUF is
begin
op <= ip when oe = '1' else 'Z';
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity BIDIR is port (
ip: in std_logic;
oe: in std_logic;
op_fb: out std_logic;
op: inout std_logic
);
end BIDIR;
architecture rtl of BIDIR is
begin
op <= ip when oe = '1' else 'Z';
op_fb <= op;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
subtype fsmType is std_logic_vector(1 downto 0);
constant loadDelayCnt : fsmType := "00";
constant waitDelayEnd : fsmType := "10";
constant loadLengthCnt : fsmType := "11";
constant waitLengthEnd : fsmType := "01";
signal currState, nextState: fsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
-- Assign pulse output
pulse <= currState(0);
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity pulseErr is port
(a: in std_logic;
b: out std_logic
);
end pulseErr;
architecture behavior of pulseErr is
signal c: std_logic;
begin
pulse: process (a,c) begin
b <= c XOR a;
c <= a;
end process;
end behavior;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulse is port (
clk, reset: in std_logic;
loadLength,loadDelay: in std_logic;
data: in std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulse;
architecture rtl of progPulse is
signal downCnt, downCntData: unsigned(7 downto 0);
signal downCntLd, downCntEn: std_logic;
signal delayCntVal, pulseCntVal: unsigned(7 downto 0);
signal startPulse, endPulse: std_logic;
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
begin
delayreg: process (clk, reset) begin
if reset = '1' then
delayCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
delayCntVal <= to_unsigned(data);
end if;
end if;
end process;
lengthReg: process (clk, reset) begin
if reset = '1' then
pulseCntVal <= "11111111";
elsif clk'event and clk = '1' then
if loadDelay = '1' then
pulseCntVal <= to_unsigned(data);
end if;
end if;
end process;
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCnt = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, pulseCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downCntData <= pulseCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downCntData <= pulseCntVal;
pulse <= '0';
end case;
end process outConProc;
downCntr: process (clk,reset) begin
if (reset = '1') then
downCnt <= "00000000";
elsif (clk'event and clk = '1') then
if (downCntLd = '1') then
downCnt <= downCntData;
elsif (downCntEn = '1') then
downCnt <= downCnt - 1;
else
downCnt <= downCnt;
end if;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
type stateVec is array (3 downto 0) of std_logic;
type stateBits is array (progPulseFsmType) of stateVec;
signal loadVal: std_logic;
constant stateTable: stateBits := (
loadDelayCnt => "0010",
waitDelayEnd => "0100",
loadLengthCnt => "0011",
waitLengthEnd => "1101" );
-- ^^^^
-- ||||__ loadVal
-- |||___ downCntLd
-- ||____ downCntEn
-- |_____ pulse
signal currState, nextState: progPulseFsmType;
begin
nextStProc: process (currState, downCnt, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (to_unsigned(downCnt) = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
pulse <= stateTable(currState)(3);
downCntEn <= stateTable(currState)(2);
downCntLd <= stateTable(currState)(1);
loadVal <= stateTable(currState)(0);
downCntData <= delayCntVal when loadVal = '0' else lengthCntVal;
end fsm;
-- Incorporates Errata 6.1
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity progPulseFsm is port (
downCnt: in std_logic_vector(7 downto 0);
delayCntVal: in std_logic_vector(7 downto 0);
lengthCntVal: in std_logic_vector(7 downto 0);
loadLength: in std_logic;
loadDelay: in std_logic;
clk: in std_logic;
reset: in std_logic;
downCntEn: out std_logic;
downCntLd: out std_logic;
downtCntData: out std_logic_vector(7 downto 0);
pulse: out std_logic
);
end progPulseFsm;
architecture fsm of progPulseFsm is
type progPulseFsmType is (loadDelayCnt, waitDelayEnd, loadLengthCnt, waitLengthEnd);
signal currState, nextState: progPulseFsmType;
signal downCntL: unsigned (7 downto 0);
begin
downCntL <= to_unsigned(downCnt); -- convert downCnt to unsigned
nextStProc: process (currState, downCntL, loadDelay, loadLength) begin
case currState is
when loadDelayCnt =>
nextState <= waitDelayEnd;
when waitDelayEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadLengthCnt;
else
nextState <= waitDelayEnd;
end if;
when loadLengthCnt =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
else
nextState <= waitLengthEnd;
end if;
when waitLengthEnd =>
if (loadDelay = '1' or loadLength = '1') then
nextState <= loadDelayCnt;
elsif (downCntL = 0) then
nextState <= loadDelayCnt;
else
nextState <= waitDelayEnd;
end if;
when others =>
null;
end case;
end process nextStProc;
currStProc: process (clk, reset) begin
if (reset = '1') then
currState <= loadDelayCnt;
elsif (clk'event and clk = '1') then
currState <= nextState;
end if;
end process currStProc;
outConProc: process (currState, delayCntVal, lengthCntVal) begin
case currState is
when loadDelayCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
when waitDelayEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= delayCntVal;
pulse <= '0';
when loadLengthCnt =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= lengthCntVal;
pulse <= '1';
when waitLengthEnd =>
downCntEn <= '1';
downCntLd <= '0';
downtCntData <= lengthCntVal;
pulse <= '1';
when others =>
downCntEn <= '0';
downCntLd <= '1';
downtCntData <= delayCntVal;
pulse <= '0';
end case;
end process outConProc;
end fsm;
-- Incorporates errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.specialFunctions.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(unsigned(inputVal)),4),16));
end process;
end behavioral;
-- Incorporate errata 5.4
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= std_logic_vector(to_unsigned(Pow(to_integer(to_unsigned(inputVal)),4),16));
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity powerOfFour is port(
clk : in std_logic;
inputVal : in std_logic_vector(3 downto 0);
power : out std_logic_vector(15 downto 0)
);
end powerOfFour;
architecture behavioral of powerOfFour is
function Pow( N, Exp : integer ) return integer is
Variable Result : integer := 1;
begin
for i in 1 to Exp loop
Result := Result * N;
end loop;
return( Result );
end Pow;
begin
process begin
wait until Clk = '1';
power <= conv_std_logic_vector(Pow(conv_integer(inputVal),4),16);
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity regFile is port (
clk, rst: in std_logic;
data: in std_logic_vector(31 downto 0);
regSel: in std_logic_vector(1 downto 0);
wrEnable: in std_logic;
regOut: out std_logic_vector(31 downto 0)
);
end regFile;
architecture behavioral of regFile is
subtype reg is std_logic_vector(31 downto 0);
type regArray is array (integer range <>) of reg;
signal registerFile: regArray(0 to 3);
begin
regProc: process (clk, rst)
variable i: integer;
begin
i := 0;
if rst = '1' then
while i <= registerFile'high loop
registerFile(i) <= (others => '0');
i := i + 1;
end loop;
elsif clk'event and clk = '1' then
if (wrEnable = '1') then
case regSel is
when "00" =>
registerFile(0) <= data;
when "01" =>
registerFile(1) <= data;
when "10" =>
registerFile(2) <= data;
when "11" =>
registerFile(3) <= data;
when others =>
null;
end case;
end if;
end if;
end process;
outputs: process(regSel, registerFile) begin
case regSel is
when "00" =>
regOut <= registerFile(0);
when "01" =>
regOut <= registerFile(1);
when "10" =>
regOut <= registerFile(2);
when "11" =>
regOut <= registerFile(3);
when others =>
null;
end case;
end process;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
entity DFF is port (
d1,d2: in std_logic;
q1,q2: out std_logic;
clk: in std_logic;
rst : in std_logic
);
end DFF;
architecture rtl of DFF is
begin
resetLatch: process (clk, rst) begin
if rst = '1' then
q1 <= '0';
elsif clk'event and clk = '1' then
q1 <= d1;
q2 <= d2;
end if;
end process;
end rtl;
library ieee;
use ieee.std_logic_1164.all;
entity resFcnDemo is port (
a, b: in std_logic;
oeA,oeB: in std_logic;
result: out std_logic
);
end resFcnDemo;
architecture multiDriver of resFcnDemo is
begin
result <= a when oeA = '1' else 'Z';
result <= b when oeB = '1' else 'Z';
end multiDriver;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleDFF is port (
data: in std_logic_vector(7 downto 0);
clock: in std_logic;
enable: in std_logic;
qout: out std_logic_vector(7 downto 0)
);
end scaleDFF;
architecture scalable of scaleDFF is
begin
u1: sDFFE port map (d => data,
clk =>clock,
en => enable,
q => qout
);
end scalable;
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
signal la_n, lb_n, lc_n, ld_n, le_n, lf_n, lg_n: std_logic;
signal oe: std_logic;
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
la_n <= '1'; lb_n <= '1';
lc_n <= '1'; ld_n <= '1';
le_n <= '1'; lf_n <= '1';
lg_n <= '1';
case bcdInputs is
when "0000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
when "0001" => lb_n <= '0'; lc_n <= '0';
when "0010" => la_n <= '0'; lb_n <= '0';
ld_n <= '0'; le_n <= '0';
lg_n <= '0';
when "0011" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lg_n <= '0';
when "0100" => lb_n <= '0'; lc_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0101" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "0110" => la_n <= '0'; lc_n <= '0';
ld_n <= '0'; le_n <= '0';
lf_n <= '0'; lg_n <= '0';
when "0111" => la_n <= '0'; lb_n <= '0';
lc_n <= '0';
when "1000" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
le_n <= '0'; lf_n <= '0';
lg_n <= '0';
when "1001" => la_n <= '0'; lb_n <= '0';
lc_n <= '0'; ld_n <= '0';
lf_n <= '0'; lg_n <= '0';
-- All other inputs possibilities are "don't care"
when others => la_n <= 'X'; lb_n <= 'X';
lc_n <= 'X'; ld_n <= 'X';
le_n <= 'X'; lf_n <= 'X';
lg_n <= 'X';
end case;
end process bcd2sevSeg;
-- Disable outputs for all invalid input values
oe <= '1' when (bcdInputs < 10) else '0';
a_n <= la_n when oe = '1' else 'Z';
b_n <= lb_n when oe = '1' else 'Z';
c_n <= lc_n when oe = '1' else 'Z';
d_n <= ld_n when oe = '1' else 'Z';
e_n <= le_n when oe = '1' else 'Z';
f_n <= lf_n when oe = '1' else 'Z';
g_n <= lg_n when oe = '1' else 'Z';
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;
entity sevenSegmentTB is
end sevenSegmentTB;
architecture testbench of sevenSegmentTB is
component sevenSegment port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end component;
type vector is record
bcdStimulus: std_logic_vector(3 downto 0);
sevSegOut: std_logic_vector(6 downto 0);
end record;
constant NumVectors: integer:= 17;
constant PropDelay: time := 40 ns;
constant SimLoopDelay: time := 10 ns;
type vectorArray is array (0 to NumVectors - 1) of vector;
constant vectorTable: vectorArray := (
(bcdStimulus => "0000", sevSegOut => "0000001"),
(bcdStimulus => "0001", sevSegOut => "1001111"),
(bcdStimulus => "0010", sevSegOut => "0010010"),
(bcdStimulus => "0011", sevSegOut => "0000110"),
(bcdStimulus => "0100", sevSegOut => "1001100"),
(bcdStimulus => "0101", sevSegOut => "0100100"),
(bcdStimulus => "0110", sevSegOut => "0100000"),
(bcdStimulus => "0111", sevSegOut => "0001111"),
(bcdStimulus => "1000", sevSegOut => "0000000"),
(bcdStimulus => "1001", sevSegOut => "0000100"),
(bcdStimulus => "1010", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1011", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1100", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1101", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1110", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "1111", sevSegOut => "ZZZZZZZ"),
(bcdStimulus => "0000", sevSegOut => "0110110") -- this vector fails
);
for all : sevenSegment use entity work.sevenSegment(behavioral);
signal StimInputs: std_logic_vector(3 downto 0);
signal CaptureOutputs: std_logic_vector(6 downto 0);
begin
u1: sevenSegment port map (bcdInputs => StimInputs,
a_n => CaptureOutputs(6),
b_n => CaptureOutputs(5),
c_n => CaptureOutputs(4),
d_n => CaptureOutputs(3),
e_n => CaptureOutputs(2),
f_n => CaptureOutputs(1),
g_n => CaptureOutputs(0));
LoopStim: process
variable FoundError: boolean := false;
variable TempVector: vector;
variable ErrorMsgLine: line;
begin
for i in vectorTable'range loop
TempVector := vectorTable(i);
StimInputs <= TempVector.bcdStimulus;
wait for PropDelay;
if CaptureOutputs /= TempVector.sevSegOut then
write (ErrorMsgLine, string'("Vector failed at "));
write (ErrorMsgLine, now);
writeline (output, ErrorMsgLine);
FoundError := true;
end if;
wait for SimLoopDelay;
end loop;
assert FoundError
report "No errors. All vectors passed."
severity note;
wait;
end process;
end testbench;
library ieee;
use ieee.std_logic_1164.all;
entity sevenSegment is port (
bcdInputs: in std_logic_vector (3 downto 0);
a_n, b_n, c_n, d_n,
e_n, f_n, g_n: out std_logic
);
end sevenSegment;
architecture behavioral of sevenSegment is
begin
bcd2sevSeg: process (bcdInputs) begin
-- Assign default to "off"
a_n <= '1'; b_n <= '1';
c_n <= '1'; d_n <= '1';
e_n <= '1'; f_n <= '1';
g_n <= '1';
case bcdInputs is
when "0000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
when "0001" =>
b_n <= '0'; c_n <= '0';
when "0010" =>
a_n <= '0'; b_n <= '0';
d_n <= '0'; e_n <= '0';
g_n <= '0';
when "0011" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
g_n <= '0';
when "0100" =>
b_n <= '0'; c_n <= '0';
f_n <= '0'; g_n <= '0';
when "0101" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; f_n <= '0';
g_n <= '0';
when "0110" =>
a_n <= '0'; c_n <= '0';
d_n <= '0'; e_n <= '0';
f_n <= '0'; g_n <= '0';
when "0111" =>
a_n <= '0'; b_n <= '0';
c_n <= '0';
when "1000" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
e_n <= '0'; f_n <= '0';
g_n <= '0';
when "1001" =>
a_n <= '0'; b_n <= '0';
c_n <= '0'; d_n <= '0';
f_n <= '0'; g_n <= '0';
when others =>
null;
end case;
end process bcd2sevSeg;
end behavioral;
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
entity ForceShare is port (
a,b,c,d,e,f: in std_logic_vector (7 downto 0);
result: out std_logic_vector(7 downto 0)
);
end ForceShare;
architecture behaviour of ForceShare is
begin
sum: process (a,c,b,d,e,f)
variable tempSum: std_logic_vector(7 downto 0);
begin
tempSum := a + b; -- temporary node for sum
if (tempSum = "10011010") then
result <= c;
elsif (tempSum = "01011001") then
result <= d;
elsif (tempSum = "10111011") then
result <= e;
else
result <= f;
end if;
end process;
end behaviour;
library IEEE;
use IEEE.std_logic_1164.all;
entity shifter is port (
clk, rst: in std_logic;
shiftEn,shiftIn: std_logic;
q: out std_logic_vector (15 downto 0)
);
end shifter;
architecture behav of shifter is
signal qLocal: std_logic_vector(15 downto 0);
begin
shift: process (clk, rst) begin
if (rst = '1') then
qLocal <= (others => '0');
elsif (clk'event and clk = '1') then
if (shiftEn = '1') then
qLocal <= qLocal(14 downto 0) & shiftIn;
else
qLocal <= qLocal;
end if;
end if;
q <= qLocal;
end process;
end behav;
library ieee;
use ieee.std_logic_1164.all;
entity lastAssignment is port
(a, b: in std_logic;
selA, selb: in std_logic;
result: out std_logic
);
end lastAssignment;
architecture behavioral of lastAssignment is
begin
demo: process (a,b,selA,selB) begin
if (selA = '1') then
result <= a;
else
result <= '0';
end if;
if (selB = '1') then
result <= b;
else
result <= '0';
end if;
end process demo;
end behavioral;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '0' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library ieee;
use ieee.std_logic_1164.all;
entity signalDemo is port (
a: in std_logic;
b: out std_logic
);
end signalDemo;
architecture basic of signalDemo is
signal c: std_logic;
begin
demo: process (a) begin
c <= a;
if c = '1' then
b <= a;
else
b <= '0';
end if;
end process;
end basic;
library IEEE;
USE IEEE.std_logic_1164.all;
package simPrimitives is
component OR2
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end component;
component SimDFF
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end component;
end simPrimitives;
library IEEE;
USE IEEE.std_logic_1164.all;
entity OR2 is
generic (tPD: time := 1 ns);
port (I1, I2: in std_logic;
Y: out std_logic
);
end OR2;
architecture simple of OR2 is
begin
Y <= I1 OR I2 after tPD;
end simple;
library IEEE;
use IEEE.std_logic_1164.all;
entity SimDFF is
generic(tCQ: time := 1 ns;
tS : time := 1 ns;
tH : time := 1 ns
);
port (D, Clk: in std_logic;
Q: out std_logic
);
end SimDff;
architecture SimModel of SimDFF is
begin
reg: process (Clk, D) begin
-- Assign output tCQ after rising clock edge
if (Clk'event and Clk = '1') then
Q <= D after tCQ;
end if;
-- Check setup time
if (Clk'event and Clk = '1') then
assert (D'last_event >= tS)
report "Setup time violation"
severity Warning;
end if;
-- Check hold time
if (D'event and Clk'stable and Clk = '1') then
assert (D'last_event - Clk'last_event > tH)
report "Hold Time Violation"
severity Warning;
end if;
end process;
end simModel;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until rising_edge(clk);
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
entity SRFF is port (
s,r: in std_logic;
clk: in std_logic;
q: out std_logic
);
end SRFF;
architecture rtl of SRFF is
begin
process begin
wait until clk = '1';
if s = '0' and r = '1' then
q <= '0';
elsif s = '1' and r = '0' then
q <= '1';
end if;
end process;
end rtl;
library IEEE;
use IEEE.std_logic_1164.all;
package scaleable is
component scaleUpCnt port (
clk: in std_logic;
reset: in std_logic;
cnt: in std_logic_vector
);
end component;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
use work.primitive.all;
entity scaleUpCnt is port (
clk: in std_logic;
reset: in std_logic;
cnt: out std_logic_vector
);
end scaleUpCnt;
architecture scaleable of scaleUpCnt is
signal one: std_logic := '1';
signal cntL: std_logic_vector(cnt'range);
signal andTerm: std_logic_vector(cnt'range);
begin
-- Special case is the least significant bit
lsb: tff port map (t => one,
reset => reset,
clk => clk,
q => cntL(cntL'low)
);
andTerm(0) <= cntL(cntL'low);
-- General case for all other bits
genAnd: for i in 1 to cntL'high generate
andTerm(i) <= andTerm(i - 1) and cntL(i);
end generate;
genTFF: for i in 1 to cntL'high generate
t1: tff port map (t => andTerm(i),
clk => clk,
reset => reset,
q => cntl(i)
);
end generate;
cnt <= CntL;
end scaleable;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "010";
constant Turn_Ar: targetFsmType := "110";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(3 downto 0);
constant Idle: targetFsmType := "0000";
constant B_Busy: targetFsmType := "0001";
constant Backoff: targetFsmType := "0011";
constant S_Data: targetFsmType := "1100";
constant Turn_Ar: targetFsmType := "1101";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "101";
constant Backoff: targetFsmType := "010";
constant S_Data: targetFsmType := "011";
constant Turn_Ar: targetFsmType := "110";
constant Dont_Care: targetFsmType := "XXX";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= Dont_Care;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Stop_n: out std_logic; -- PCI Stop#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
type targetFsmType is (Idle, B_Busy, Backoff, S_Data, Turn_Ar);
signal currState, nextState: targetFsmType;
begin
-- Process to generate next state logic
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
-- Process to register the current state
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
-- Process to generate outputs
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
-- Assign output ports
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
-- Incorporates Errata 10.1 and 10.2
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(4 downto 0);
constant Idle: integer := 0;
constant B_Busy: integer := 1;
constant Backoff: integer := 2;
constant S_Data: integer := 3;
constant Turn_Ar: integer := 4;
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
nextState <= (others => '0');
if currState(Idle) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
if currState(B_Busy) = '1' then
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState(Idle) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState(S_Data) <= '1';
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState(Backoff) <= '1';
else
nextState(B_Busy) <= '1';
end if;
end if;
if currState(S_Data) = '1' then
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState(Backoff) <= '1';
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState(Turn_Ar) <= '1';
else
nextState(S_Data) <= '1';
end if;
end if;
if currState(Backoff) = '1' then
if PCI_Frame_n = '1' then
nextState(Turn_Ar) <= '1';
else
nextState(Backoff) <= '1';
end if;
end if;
if currState(Turn_Ar) = '1' then
if (PCI_Frame_n = '0' and Hit = '0') then
nextState(B_Busy) <= '1';
else
nextState(Idle) <= '1';
end if;
end if;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= (others => '0'); -- per Errata 10.2
currState(Idle) <= '1';
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
OE_Trdy_n <= '0'; OE_Stop_n <= '0'; OE_Devsel_n <= '0'; -- defaults per errata 10.1
OE_AD <= '0'; LPCI_Trdy_n <= '1'; LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
if (currState(S_Data) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Backoff) = '1') then
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
end if;
if (currState(Turn_Ar) = '1') then
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
end if;
if (currState(Idle) = '1' or currState(B_Busy) = '1') then
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end if;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when IDLE =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when B_BUSY =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= IDLE;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= BACKOFF;
else
nextState <= B_BUSY;
end if;
when S_DATA =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and (LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= BACKOFF;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= TURN_AR;
else
nextState <= S_DATA;
end if;
when BACKOFF =>
if PCI_Frame_n = '1' then
nextState <= TURN_AR;
else
nextState <= BACKOFF;
end if;
when TURN_AR =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_BUSY;
else
nextState <= IDLE;
end if;
when others =>
nextState <= IDLE;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
-- Set default output assignments
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library IEEE;
use IEEE.std_logic_1164.all;
entity pci_target is port (
PCI_Frame_n: in std_logic; -- PCI Frame#
PCI_Irdy_n: in std_logic; -- PCI Irdy#
Hit: in std_logic; -- Hit on address decode
D_Done: in std_logic; -- Device decode complete
Term: in std_logic; -- Terminate transaction
Ready: in std_logic; -- Ready to transfer data
Cmd_Write: in std_logic; -- Command is Write
Cmd_Read: in std_logic; -- Command is Read
T_Abort: in std_logic; -- Target error - abort transaction
PCI_Clk: in std_logic; -- PCI Clock
PCI_Reset_n: in std_logic; -- PCI Reset#
PCI_Devsel_n: out std_logic; -- PCI Devsel#
PCI_Trdy_n: out std_logic; -- PCI Trdy#
PCI_Stop_n: out std_logic; -- PCI Stop#
OE_AD: out std_logic; -- PCI AD bus enable
OE_Trdy_n: out std_logic; -- PCI Trdy# enable
OE_Stop_n: out std_logic; -- PCI Stop# enable
OE_Devsel_n: out std_logic -- PCI Devsel# enable
);
end pci_target;
architecture fsm of pci_target is
signal LPCI_Devsel_n, LPCI_Trdy_n, LPCI_Stop_n: std_logic;
subtype targetFsmType is std_logic_vector(2 downto 0);
constant Idle: targetFsmType := "000";
constant B_Busy: targetFsmType := "001";
constant Backoff: targetFsmType := "011";
constant S_Data: targetFsmType := "110";
constant Turn_Ar: targetFsmType := "100";
signal currState, nextState: targetFsmType;
begin
nxtStProc: process (currState, PCI_Frame_n, Hit, D_Done, PCI_Irdy_n, LPCI_Trdy_n,
LPCI_Devsel_n, LPCI_Stop_n, Term, Ready) begin
case currState is
when Idle =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when B_Busy =>
if (PCI_Frame_n ='1' and D_Done = '1') or
(PCI_Frame_n = '1' and D_Done = '0' and LPCI_Devsel_n = '0') then
nextState <= Idle;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '0' or (Term = '1' and Ready = '1') ) then
nextState <= S_Data;
elsif (PCI_Frame_n = '0' or PCI_Irdy_n = '0') and Hit = '1' and
(Term = '1' and Ready = '0') then
nextState <= Backoff;
else
nextState <= B_Busy;
end if;
when S_Data =>
if PCI_Frame_n = '0' and LPCI_Stop_n = '0' and
(LPCI_Trdy_n = '1' or PCI_Irdy_n = '0') then
nextState <= Backoff;
elsif PCI_Frame_n = '1' and (LPCI_Trdy_n = '0' or LPCI_Stop_n = '0') then
nextState <= Turn_Ar;
else
nextState <= S_Data;
end if;
when Backoff =>
if PCI_Frame_n = '1' then
nextState <= Turn_Ar;
else
nextState <= Backoff;
end if;
when Turn_Ar =>
if (PCI_Frame_n = '0' and Hit = '0') then
nextState <= B_Busy;
else
nextState <= Idle;
end if;
when others =>
null;
end case;
end process nxtStProc;
curStProc: process (PCI_Clk, PCI_Reset_n) begin
if (PCI_Reset_n = '0') then
currState <= Idle;
elsif (PCI_Clk'event and PCI_Clk = '1') then
currState <= nextState;
end if;
end process curStProc;
outConProc: process (currState, Ready, T_Abort, Cmd_Write,
Cmd_Read, T_Abort, Term) begin
case currState is
when S_Data =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
if (Ready = '1' and T_Abort = '0' and (Cmd_Write = '1' or Cmd_Read = '1')) then
LPCI_Trdy_n <= '0';
else
LPCI_Trdy_n <= '1';
end if;
if (T_Abort = '1' or Term = '1') and (Cmd_Write = '1' or Cmd_Read = '1') then
LPCI_Stop_n <= '0';
else
LPCI_Stop_n <= '1';
end if;
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when Backoff =>
if (Cmd_Read = '1') then
OE_AD <= '1';
else
OE_AD <= '0';
end if;
LPCI_Stop_n <= '0';
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
if (T_Abort = '0') then
LPCI_Devsel_n <= '0';
else
LPCI_Devsel_n <= '1';
end if;
when Turn_Ar =>
OE_Trdy_n <= '1';
OE_Stop_n <= '1';
OE_Devsel_n <= '1';
when others =>
OE_Trdy_n <= '0';
OE_Stop_n <= '0';
OE_Devsel_n <= '0';
OE_AD <= '0';
LPCI_Trdy_n <= '1';
LPCI_Stop_n <= '1';
LPCI_Devsel_n <= '1';
end case;
end process outConProc;
PCI_Devsel_n <= LPCI_Devsel_n;
PCI_Trdy_n <= LPCI_Trdy_n;
PCI_Stop_n <= LPCI_Stop_n;
end fsm;
library ieee;
use ieee.std_logic_1164.all;
entity test is port (
a: in std_logic;
z: out std_logic;
en: in std_logic
);
end test;
architecture simple of test is
begin
z <= a when en = '1' else 'z';
end simple;
|
entity sigvar is
end entity;
architecture test of sigvar is
procedure proc1(signal x : bit_vector) is
variable y : bit_vector(x'range);
begin
y := x;
end procedure;
procedure proc2(signal x : out bit_vector; signal y : in bit_vector) is
begin
x <= y;
end procedure;
procedure proc3(signal x : out bit_vector; signal y : in bit_vector) is
begin
x <= y & "1";
end procedure;
begin
end architecture;
|
entity sigvar is
end entity;
architecture test of sigvar is
procedure proc1(signal x : bit_vector) is
variable y : bit_vector(x'range);
begin
y := x;
end procedure;
procedure proc2(signal x : out bit_vector; signal y : in bit_vector) is
begin
x <= y;
end procedure;
procedure proc3(signal x : out bit_vector; signal y : in bit_vector) is
begin
x <= y & "1";
end procedure;
begin
end architecture;
|
entity sigvar is
end entity;
architecture test of sigvar is
procedure proc1(signal x : bit_vector) is
variable y : bit_vector(x'range);
begin
y := x;
end procedure;
procedure proc2(signal x : out bit_vector; signal y : in bit_vector) is
begin
x <= y;
end procedure;
procedure proc3(signal x : out bit_vector; signal y : in bit_vector) is
begin
x <= y & "1";
end procedure;
begin
end architecture;
|
entity sigvar is
end entity;
architecture test of sigvar is
procedure proc1(signal x : bit_vector) is
variable y : bit_vector(x'range);
begin
y := x;
end procedure;
procedure proc2(signal x : out bit_vector; signal y : in bit_vector) is
begin
x <= y;
end procedure;
procedure proc3(signal x : out bit_vector; signal y : in bit_vector) is
begin
x <= y & "1";
end procedure;
begin
end architecture;
|
entity sigvar is
end entity;
architecture test of sigvar is
procedure proc1(signal x : bit_vector) is
variable y : bit_vector(x'range);
begin
y := x;
end procedure;
procedure proc2(signal x : out bit_vector; signal y : in bit_vector) is
begin
x <= y;
end procedure;
procedure proc3(signal x : out bit_vector; signal y : in bit_vector) is
begin
x <= y & "1";
end procedure;
begin
end architecture;
|
architecture RTL of FIFO is
type state_machine is (idle, write, read, done);
-- Violations below
type
state_machine is (idle, write, read, done);
type
state_machine is (idle, write, read, done);
begin
end architecture RTL;
|
entity bounds7 is
end entity;
architecture test of bounds7 is
type my_int is range 1 to 10;
begin
process is
variable x : my_int;
variable y : integer;
begin
x := 6;
y := integer(x);
x := 10;
x := x + 1;
wait;
end process;
end architecture;
|
entity bounds7 is
end entity;
architecture test of bounds7 is
type my_int is range 1 to 10;
begin
process is
variable x : my_int;
variable y : integer;
begin
x := 6;
y := integer(x);
x := 10;
x := x + 1;
wait;
end process;
end architecture;
|
entity bounds7 is
end entity;
architecture test of bounds7 is
type my_int is range 1 to 10;
begin
process is
variable x : my_int;
variable y : integer;
begin
x := 6;
y := integer(x);
x := 10;
x := x + 1;
wait;
end process;
end architecture;
|
entity bounds7 is
end entity;
architecture test of bounds7 is
type my_int is range 1 to 10;
begin
process is
variable x : my_int;
variable y : integer;
begin
x := 6;
y := integer(x);
x := 10;
x := x + 1;
wait;
end process;
end architecture;
|
-------------------------------------------------------------------------
---- ----
---- Company: University of Bonn ----
---- Engineer: John Bieling ----
---- ----
-------------------------------------------------------------------------
---- ----
---- Copyright (C) 2015 John Bieling ----
---- ----
---- This program is free software; you can redistribute it and/or ----
---- modify it under the terms of the GNU General Public License as ----
---- published by the Free Software Foundation; either version 3 of ----
---- the License, or (at your option) any later version. ----
---- ----
---- This program is distributed in the hope that it will be useful, ----
---- but WITHOUT ANY WARRANTY; without even the implied warranty of ----
---- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ----
---- GNU General Public License for more details. ----
---- ----
---- You should have received a copy of the GNU General Public ----
---- License along with this program; if not, see ----
---- <http://www.gnu.org/licenses>. ----
---- ----
-------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
---- Uncomment the following library declaration if instantiating
---- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;
entity signal_clipper is
Port ( sig : in STD_LOGIC;
CLK : in STD_LOGIC;
clipped_sig : out STD_LOGIC := '0');
end signal_clipper;
architecture Behavioral of signal_clipper is
signal q1 : STD_LOGIC := '0';
signal q2 : STD_LOGIC := '0';
begin
process (CLK) is
begin
if (rising_edge(CLK)) then
q1 <= sig;
q2 <= q1;
clipped_sig <= q1 AND NOT q2;
end if;
end process;
end Behavioral;
|
--Generic Help
--C_CDC_TYPE : Defines the type of CDC needed
-- 0 means pulse synchronizer. Used to transfer one clock pulse
-- from prmry domain to scndry domain.
-- 1 means level synchronizer. Used to transfer level signal.
-- 2 means level synchronizer with ack. Used to transfer level
-- signal. Input signal should change only when prmry_ack is detected
--
--C_FLOP_INPUT : when set to 1 adds one flop stage to the input prmry_in signal
-- Set to 0 when incoming signal is purely floped signal.
--
--C_RESET_STATE : Generally sync flops need not have resets. However, in some cases
-- it might be needed.
-- 0 means reset not needed for sync flops
-- 1 means reset needed for sync flops. i
-- In this case prmry_resetn should be in prmry clock,
-- while scndry_reset should be in scndry clock.
--
--C_SINGLE_BIT : CDC should normally be done for single bit signals only.
-- However, based on design buses can also be CDC'ed.
-- 0 means it is a bus. In this case input be connected to prmry_vect_in.
-- Output is on scndry_vect_out.
-- 1 means it is a single bit. In this case input be connected to prmry_in.
-- Output is on scndry_out.
--
--C_VECTOR_WIDTH : defines the size of bus. This is irrelevant when C_SINGLE_BIT = 1
--
--C_MTBF_STAGES : Defines the number of sync stages needed. Allowed values are 0 to 6.
-- Value of 0, 1 is allowed only for level CDC.
-- Min value for Pulse CDC is 2
--
--Whenever this file is used following XDC constraint has to be added
-- set_false_path -to [get_pins -hier *cdc_to*/D]
--IO Ports
--
-- prmry_aclk : clock of originating domain (source domain)
-- prmry_resetn : sync reset of originating clock domain (source domain)
-- prmry_in : input signal bit. This should be a pure flop output without
-- any combi logic. This is source.
-- prmry_vect_in : bus signal. From Source domain.
-- prmry_ack : Ack signal, valid for one clock period, in prmry_aclk domain.
-- Used only when C_CDC_TYPE = 2
-- scndry_aclk : destination clock.
-- scndry_resetn : sync reset of destination domain
-- scndry_out : sync'ed output in destination domain. Single bit.
-- scndry_vect_out : sync'ed output in destination domain. bus.
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use ieee.std_logic_misc.all;
entity cdc_sync is
generic (
C_CDC_TYPE : integer range 0 to 2 := 1 ;
-- 0 is pulse synch
-- 1 is level synch
-- 2 is ack based level sync
C_RESET_STATE : integer range 0 to 1 := 0 ;
-- 0 is reset not needed
-- 1 is reset needed
C_SINGLE_BIT : integer range 0 to 1 := 1 ;
-- 0 is bus input
-- 1 is single bit input
C_FLOP_INPUT : integer range 0 to 1 := 0 ;
C_VECTOR_WIDTH : integer range 0 to 32 := 32 ;
C_MTBF_STAGES : integer range 0 to 6 := 2
-- Vector Data witdth
);
port (
prmry_aclk : in std_logic ; --
prmry_resetn : in std_logic ; --
prmry_in : in std_logic ; --
prmry_vect_in : in std_logic_vector --
(C_VECTOR_WIDTH - 1 downto 0) ; --
prmry_ack : out std_logic ;
--
scndry_aclk : in std_logic ; --
scndry_resetn : in std_logic ; --
--
-- Primary to Secondary Clock Crossing --
scndry_out : out std_logic ; --
--
scndry_vect_out : out std_logic_vector --
(C_VECTOR_WIDTH - 1 downto 0) --
);
end cdc_sync;
-------------------------------------------------------------------------------
-- Architecture
-------------------------------------------------------------------------------
architecture implementation of cdc_sync is
attribute DowngradeIPIdentifiedWarnings: string;
attribute DowngradeIPIdentifiedWarnings of implementation : architecture is "yes";
-------------------------------------------------------------------------------
-- Functions
-------------------------------------------------------------------------------
-- No Functions Declared
-------------------------------------------------------------------------------
-- Constants Declarations
-------------------------------------------------------------------------------
-- No Constants Declared
-------------------------------------------------------------------------------
-- Begin architecture logic
-------------------------------------------------------------------------------
begin
-- Generate PULSE clock domain crossing
GENERATE_PULSE_P_S_CDC_OPEN_ENDED : if C_CDC_TYPE = 0 generate
-- Primary to Secondary
signal s_out_d1_cdc_to : std_logic := '0';
signal s_out_d2 : std_logic := '0';
signal s_out_d3 : std_logic := '0';
signal s_out_d4 : std_logic := '0';
signal s_out_d5 : std_logic := '0';
signal s_out_d6 : std_logic := '0';
signal s_out_d7 : std_logic := '0';
signal s_out_re : std_logic := '0';
signal prmry_in_xored : std_logic := '0';
signal p_in_d1_cdc_from : std_logic := '0';
-----------------------------------------------------------------------------
-- ATTRIBUTE Declarations
-----------------------------------------------------------------------------
-- Prevent x-propagation on clock-domain crossing register
ATTRIBUTE async_reg : STRING;
ATTRIBUTE async_reg OF s_out_d1_cdc_to : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_out_d2 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_out_d3 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_out_d4 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_out_d5 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_out_d6 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_out_d7 : SIGNAL IS "true";
begin
--*****************************************************************************
--** Asynchronous Pulse Clock Crossing **
--** PRIMARY TO SECONDARY OPEN-ENDED **
--*****************************************************************************
scndry_vect_out <= (others => '0');
prmry_ack <= '0';
prmry_in_xored <= prmry_in xor p_in_d1_cdc_from;
REG_P_IN : process(prmry_aclk)
begin
if(prmry_aclk'EVENT and prmry_aclk ='1')then
if(prmry_resetn = '0')then
p_in_d1_cdc_from <= '0';
else
p_in_d1_cdc_from <= prmry_in_xored;
end if;
end if;
end process REG_P_IN;
P_IN_CROSS2SCNDRY : process(scndry_aclk)
begin
if(scndry_aclk'EVENT and scndry_aclk ='1')then
if(scndry_resetn = '0' and C_RESET_STATE = 1)then
s_out_d1_cdc_to <= '0';
s_out_d2 <= '0';
s_out_d3 <= '0';
s_out_d4 <= '0';
s_out_d5 <= '0';
s_out_d6 <= '0';
s_out_d7 <= '0';
scndry_out <= '0';
else
s_out_d1_cdc_to <= p_in_d1_cdc_from;
s_out_d2 <= s_out_d1_cdc_to;
s_out_d3 <= s_out_d2;
s_out_d4 <= s_out_d3;
s_out_d5 <= s_out_d4;
s_out_d6 <= s_out_d5;
s_out_d7 <= s_out_d6;
scndry_out <= s_out_re;
end if;
end if;
end process P_IN_CROSS2SCNDRY;
MTBF_2 : if C_MTBF_STAGES = 2 generate
begin
s_out_re <= s_out_d2 xor s_out_d3;
end generate MTBF_2;
MTBF_3 : if C_MTBF_STAGES = 3 generate
begin
s_out_re <= s_out_d3 xor s_out_d4;
end generate MTBF_3;
MTBF_4 : if C_MTBF_STAGES = 4 generate
begin
s_out_re <= s_out_d4 xor s_out_d5;
end generate MTBF_4;
MTBF_5 : if C_MTBF_STAGES = 5 generate
begin
s_out_re <= s_out_d5 xor s_out_d6;
end generate MTBF_5;
MTBF_6 : if C_MTBF_STAGES = 6 generate
begin
s_out_re <= s_out_d6 xor s_out_d7;
end generate MTBF_6;
-- Feed secondary pulse out
end generate GENERATE_PULSE_P_S_CDC_OPEN_ENDED;
-- Generate LEVEL clock domain crossing with reset state = 0
GENERATE_LEVEL_P_S_CDC : if C_CDC_TYPE = 1 generate
begin
-- Primary to Secondary
SINGLE_BIT : if C_SINGLE_BIT = 1 generate
signal p_level_in_d1_cdc_from : std_logic := '0';
signal p_level_in_int : std_logic := '0';
signal s_level_out_d1_cdc_to : std_logic := '0';
signal s_level_out_d2 : std_logic := '0';
signal s_level_out_d3 : std_logic := '0';
signal s_level_out_d4 : std_logic := '0';
signal s_level_out_d5 : std_logic := '0';
signal s_level_out_d6 : std_logic := '0';
-----------------------------------------------------------------------------
-- ATTRIBUTE Declarations
-----------------------------------------------------------------------------
-- Prevent x-propagation on clock-domain crossing register
ATTRIBUTE async_reg : STRING;
ATTRIBUTE async_reg OF s_level_out_d1_cdc_to : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_d2 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_d3 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_d4 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_d5 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_d6 : SIGNAL IS "true";
begin
--*****************************************************************************
--** Asynchronous Level Clock Crossing **
--** PRIMARY TO SECONDARY **
--*****************************************************************************
-- register is scndry to provide clean ff output to clock crossing logic
scndry_vect_out <= (others => '0');
prmry_ack <= '0';
INPUT_FLOP : if C_FLOP_INPUT = 1 generate
begin
REG_PLEVEL_IN : process(prmry_aclk)
begin
if(prmry_aclk'EVENT and prmry_aclk ='1')then
if(prmry_resetn = '0' and C_RESET_STATE = 1)then
p_level_in_d1_cdc_from <= '0';
else
p_level_in_d1_cdc_from <= prmry_in;
end if;
end if;
end process REG_PLEVEL_IN;
p_level_in_int <= p_level_in_d1_cdc_from;
end generate INPUT_FLOP;
NO_INPUT_FLOP : if C_FLOP_INPUT = 0 generate
begin
p_level_in_int <= prmry_in;
end generate NO_INPUT_FLOP;
CROSS_PLEVEL_IN2SCNDRY : process(scndry_aclk)
begin
if(scndry_aclk'EVENT and scndry_aclk ='1')then
if(scndry_resetn = '0' and C_RESET_STATE = 1)then
s_level_out_d1_cdc_to <= '0';
s_level_out_d2 <= '0';
s_level_out_d3 <= '0';
s_level_out_d4 <= '0';
s_level_out_d5 <= '0';
s_level_out_d6 <= '0';
else
s_level_out_d1_cdc_to <= p_level_in_int;
s_level_out_d2 <= s_level_out_d1_cdc_to;
s_level_out_d3 <= s_level_out_d2;
s_level_out_d4 <= s_level_out_d3;
s_level_out_d5 <= s_level_out_d4;
s_level_out_d6 <= s_level_out_d5;
end if;
end if;
end process CROSS_PLEVEL_IN2SCNDRY;
MTBF_L1 : if C_MTBF_STAGES = 1 generate
begin
scndry_out <= s_level_out_d1_cdc_to;
end generate MTBF_L1;
MTBF_L2 : if C_MTBF_STAGES = 2 generate
begin
scndry_out <= s_level_out_d2;
end generate MTBF_L2;
MTBF_L3 : if C_MTBF_STAGES = 3 generate
begin
scndry_out <= s_level_out_d3;
end generate MTBF_L3;
MTBF_L4 : if C_MTBF_STAGES = 4 generate
begin
scndry_out <= s_level_out_d4;
end generate MTBF_L4;
MTBF_L5 : if C_MTBF_STAGES = 5 generate
begin
scndry_out <= s_level_out_d5;
end generate MTBF_L5;
MTBF_L6 : if C_MTBF_STAGES = 6 generate
begin
scndry_out <= s_level_out_d6;
end generate MTBF_L6;
end generate SINGLE_BIT;
MULTI_BIT : if C_SINGLE_BIT = 0 generate
signal p_level_in_bus_int : std_logic_vector (C_VECTOR_WIDTH - 1 downto 0);
signal p_level_in_bus_d1_cdc_from : std_logic_vector(C_VECTOR_WIDTH - 1 downto 0);
signal s_level_out_bus_d1_cdc_to : std_logic_vector(C_VECTOR_WIDTH - 1 downto 0);
signal s_level_out_bus_d1_cdc_tig : std_logic_vector(C_VECTOR_WIDTH - 1 downto 0);
signal s_level_out_bus_d2 : std_logic_vector(C_VECTOR_WIDTH - 1 downto 0);
signal s_level_out_bus_d3 : std_logic_vector(C_VECTOR_WIDTH - 1 downto 0);
signal s_level_out_bus_d4 : std_logic_vector(C_VECTOR_WIDTH - 1 downto 0);
signal s_level_out_bus_d5 : std_logic_vector(C_VECTOR_WIDTH - 1 downto 0);
signal s_level_out_bus_d6 : std_logic_vector(C_VECTOR_WIDTH - 1 downto 0);
-----------------------------------------------------------------------------
-- ATTRIBUTE Declarations
-----------------------------------------------------------------------------
-- Prevent x-propagation on clock-domain crossing register
ATTRIBUTE async_reg : STRING;
ATTRIBUTE async_reg OF s_level_out_bus_d1_cdc_to : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_bus_d2 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_bus_d3 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_bus_d4 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_bus_d5 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_bus_d6 : SIGNAL IS "true";
begin
--*****************************************************************************
--** Asynchronous Level Clock Crossing **
--** PRIMARY TO SECONDARY **
--*****************************************************************************
-- register is scndry to provide clean ff output to clock crossing logic
scndry_out <= '0';
prmry_ack <= '0';
INPUT_FLOP_BUS : if C_FLOP_INPUT = 1 generate
begin
REG_PLEVEL_IN : process(prmry_aclk)
begin
if(prmry_aclk'EVENT and prmry_aclk ='1')then
if(prmry_resetn = '0' and C_RESET_STATE = 1)then
p_level_in_bus_d1_cdc_from <= (others => '0');
else
p_level_in_bus_d1_cdc_from <= prmry_vect_in;
end if;
end if;
end process REG_PLEVEL_IN;
p_level_in_bus_int <= p_level_in_bus_d1_cdc_from;
end generate INPUT_FLOP_BUS;
NO_INPUT_FLOP_BUS : if C_FLOP_INPUT = 0 generate
begin
p_level_in_bus_int <= prmry_vect_in;
end generate NO_INPUT_FLOP_BUS;
CROSS_PLEVEL_IN2SCNDRY : process(scndry_aclk)
begin
if(scndry_aclk'EVENT and scndry_aclk ='1')then
if(scndry_resetn = '0' and C_RESET_STATE = 1)then
s_level_out_bus_d1_cdc_to <= (others => '0');
s_level_out_bus_d2 <= (others => '0');
s_level_out_bus_d3 <= (others => '0');
s_level_out_bus_d4 <= (others => '0');
s_level_out_bus_d5 <= (others => '0');
s_level_out_bus_d6 <= (others => '0');
else
s_level_out_bus_d1_cdc_to <= p_level_in_bus_int;
s_level_out_bus_d2 <= s_level_out_bus_d1_cdc_to;
s_level_out_bus_d3 <= s_level_out_bus_d2;
s_level_out_bus_d4 <= s_level_out_bus_d3;
s_level_out_bus_d5 <= s_level_out_bus_d4;
s_level_out_bus_d6 <= s_level_out_bus_d5;
end if;
end if;
end process CROSS_PLEVEL_IN2SCNDRY;
MTBF_L1 : if C_MTBF_STAGES = 1 generate
begin
scndry_vect_out <= s_level_out_bus_d1_cdc_to;
end generate MTBF_L1;
MTBF_L2 : if C_MTBF_STAGES = 2 generate
begin
scndry_vect_out <= s_level_out_bus_d2;
end generate MTBF_L2;
MTBF_L3 : if C_MTBF_STAGES = 3 generate
begin
scndry_vect_out <= s_level_out_bus_d3;
end generate MTBF_L3;
MTBF_L4 : if C_MTBF_STAGES = 4 generate
begin
scndry_vect_out <= s_level_out_bus_d4;
end generate MTBF_L4;
MTBF_L5 : if C_MTBF_STAGES = 5 generate
begin
scndry_vect_out <= s_level_out_bus_d5;
end generate MTBF_L5;
MTBF_L6 : if C_MTBF_STAGES = 6 generate
begin
scndry_vect_out <= s_level_out_bus_d6;
end generate MTBF_L6;
end generate MULTI_BIT;
end generate GENERATE_LEVEL_P_S_CDC;
GENERATE_LEVEL_ACK_P_S_CDC : if C_CDC_TYPE = 2 generate
-- Primary to Secondary
signal p_level_in_d1_cdc_from : std_logic := '0';
signal p_level_in_int : std_logic := '0';
signal s_level_out_d1_cdc_to : std_logic := '0';
signal s_level_out_d2 : std_logic := '0';
signal s_level_out_d3 : std_logic := '0';
signal s_level_out_d4 : std_logic := '0';
signal s_level_out_d5 : std_logic := '0';
signal s_level_out_d6 : std_logic := '0';
signal p_level_out_d1_cdc_to : std_logic := '0';
signal p_level_out_d2 : std_logic := '0';
signal p_level_out_d3 : std_logic := '0';
signal p_level_out_d4 : std_logic := '0';
signal p_level_out_d5 : std_logic := '0';
signal p_level_out_d6 : std_logic := '0';
signal p_level_out_d7 : std_logic := '0';
signal scndry_out_int : std_logic := '0';
signal prmry_pulse_ack : std_logic := '0';
-----------------------------------------------------------------------------
-- ATTRIBUTE Declarations
-----------------------------------------------------------------------------
-- Prevent x-propagation on clock-domain crossing register
ATTRIBUTE async_reg : STRING;
ATTRIBUTE async_reg OF s_level_out_d1_cdc_to : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_d2 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_d3 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_d4 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_d5 : SIGNAL IS "true";
ATTRIBUTE async_reg OF s_level_out_d6 : SIGNAL IS "true";
ATTRIBUTE async_reg OF p_level_out_d1_cdc_to : SIGNAL IS "true";
ATTRIBUTE async_reg OF p_level_out_d2 : SIGNAL IS "true";
ATTRIBUTE async_reg OF p_level_out_d3 : SIGNAL IS "true";
ATTRIBUTE async_reg OF p_level_out_d4 : SIGNAL IS "true";
ATTRIBUTE async_reg OF p_level_out_d5 : SIGNAL IS "true";
ATTRIBUTE async_reg OF p_level_out_d6 : SIGNAL IS "true";
begin
--*****************************************************************************
--** Asynchronous Level Clock Crossing **
--** PRIMARY TO SECONDARY **
--*****************************************************************************
-- register is scndry to provide clean ff output to clock crossing logic
scndry_vect_out <= (others => '0');
INPUT_FLOP : if C_FLOP_INPUT = 1 generate
begin
REG_PLEVEL_IN : process(prmry_aclk)
begin
if(prmry_aclk'EVENT and prmry_aclk ='1')then
if(prmry_resetn = '0' and C_RESET_STATE = 1)then
p_level_in_d1_cdc_from <= '0';
else
p_level_in_d1_cdc_from <= prmry_in;
end if;
end if;
end process REG_PLEVEL_IN;
p_level_in_int <= p_level_in_d1_cdc_from;
end generate INPUT_FLOP;
NO_INPUT_FLOP : if C_FLOP_INPUT = 0 generate
begin
p_level_in_int <= prmry_in;
end generate NO_INPUT_FLOP;
CROSS_PLEVEL_IN2SCNDRY : process(scndry_aclk)
begin
if(scndry_aclk'EVENT and scndry_aclk ='1')then
if(scndry_resetn = '0' and C_RESET_STATE = 1)then
s_level_out_d1_cdc_to <= '0';
s_level_out_d2 <= '0';
s_level_out_d3 <= '0';
s_level_out_d4 <= '0';
s_level_out_d5 <= '0';
s_level_out_d6 <= '0';
else
s_level_out_d1_cdc_to <= p_level_in_int;
s_level_out_d2 <= s_level_out_d1_cdc_to;
s_level_out_d3 <= s_level_out_d2;
s_level_out_d4 <= s_level_out_d3;
s_level_out_d5 <= s_level_out_d4;
s_level_out_d6 <= s_level_out_d5;
end if;
end if;
end process CROSS_PLEVEL_IN2SCNDRY;
CROSS_PLEVEL_SCNDRY2PRMRY : process(prmry_aclk)
begin
if(prmry_aclk'EVENT and prmry_aclk ='1')then
if(prmry_resetn = '0' and C_RESET_STATE = 1)then
p_level_out_d1_cdc_to <= '0';
p_level_out_d2 <= '0';
p_level_out_d3 <= '0';
p_level_out_d4 <= '0';
p_level_out_d5 <= '0';
p_level_out_d6 <= '0';
p_level_out_d7 <= '0';
prmry_ack <= '0';
else
p_level_out_d1_cdc_to <= scndry_out_int;
p_level_out_d2 <= p_level_out_d1_cdc_to;
p_level_out_d3 <= p_level_out_d2;
p_level_out_d4 <= p_level_out_d3;
p_level_out_d5 <= p_level_out_d4;
p_level_out_d6 <= p_level_out_d5;
p_level_out_d7 <= p_level_out_d6;
prmry_ack <= prmry_pulse_ack;
end if;
end if;
end process CROSS_PLEVEL_SCNDRY2PRMRY;
MTBF_L2 : if C_MTBF_STAGES = 2 or C_MTBF_STAGES = 1 generate
begin
scndry_out_int <= s_level_out_d2;
--prmry_pulse_ack <= p_level_out_d3 xor p_level_out_d2;
prmry_pulse_ack <= (not p_level_out_d3) and p_level_out_d2;
end generate MTBF_L2;
MTBF_L3 : if C_MTBF_STAGES = 3 generate
begin
scndry_out_int <= s_level_out_d3;
--prmry_pulse_ack <= p_level_out_d4 xor p_level_out_d3;
prmry_pulse_ack <= (not p_level_out_d4) and p_level_out_d3;
end generate MTBF_L3;
MTBF_L4 : if C_MTBF_STAGES = 4 generate
begin
scndry_out_int <= s_level_out_d4;
--prmry_pulse_ack <= p_level_out_d5 xor p_level_out_d4;
prmry_pulse_ack <= (not p_level_out_d5) and p_level_out_d4;
end generate MTBF_L4;
MTBF_L5 : if C_MTBF_STAGES = 5 generate
begin
scndry_out_int <= s_level_out_d5;
--prmry_pulse_ack <= p_level_out_d6 xor p_level_out_d5;
prmry_pulse_ack <= (not p_level_out_d6) and p_level_out_d5;
end generate MTBF_L5;
MTBF_L6 : if C_MTBF_STAGES = 6 generate
begin
scndry_out_int <= s_level_out_d6;
--prmry_pulse_ack <= p_level_out_d7 xor p_level_out_d6;
prmry_pulse_ack <= (not p_level_out_d7) and p_level_out_d6;
end generate MTBF_L6;
scndry_out <= scndry_out_int;
end generate GENERATE_LEVEL_ACK_P_S_CDC;
end implementation;
|
--------------------------------------------------------------------------------
-- Title : RX data path
-- Project : 16z091-01
--------------------------------------------------------------------------------
-- File : rx_get_data.vhd
-- Author : Susanne Reinfelder
-- Email : [email protected]
-- Organization: MEN Mikro Elektronik Nuremberg GmbH
-- Created : 2013-01-24
--------------------------------------------------------------------------------
-- Simulator : ModelSim PE 6.6d / ModelSim AE 6.5e sp1
-- Synthesis :
--------------------------------------------------------------------------------
-- Description :
-- manages RX data path and provides information contained in rx_st_data0
--------------------------------------------------------------------------------
-- Hierarchy :
-- ip_16z091_01
-- rx_module
-- rx_ctrl
-- * rx_get_data
-- rx_fifo
-- rx_len_cntr
-- wb_master
-- wb_slave
-- tx_module
-- tx_ctrl
-- tx_put_data
-- tx_compl_timeout
-- tx_fifo_data
-- tx_fifo_header
-- error
-- err_fifo
-- init
-- interrupt_core
-- interrupt_wb
--------------------------------------------------------------------------------
-- Copyright (c) 2016, MEN Mikro Elektronik GmbH
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
--------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
library work;
use work.src_utils_pkg.all;
entity rx_get_data is
port(
clk_i : in std_logic;
rst_i : in std_logic;
-- IP Core
rx_st_valid0 : in std_logic;
rx_st_data0 : in std_logic_vector(63 downto 0);
rx_st_bardec0 : in std_logic_vector(7 downto 0);
rx_st_sop0 : in std_logic;
-- FIFO
rx_fifo_in_o : out std_logic_vector(63 downto 0);
-- tx_ctrl
tag_nbr_o : out std_logic_vector(7 downto 0);
tag_rcvd_o : out std_logic;
-- rx_ctrl
len_cntr_val_o : out std_logic_vector(9 downto 0);
-- error
type_fmt_err_o : out std_logic_vector(1 downto 0);
-- rx_sig_manage
sop_q_i : in std_logic
);
end entity rx_get_data;
architecture rx_get_data_arch of rx_get_data is
-- +----------------------------------------------------------------------------
-- | functions or procedures
-- +----------------------------------------------------------------------------
-- NONE
-- +----------------------------------------------------------------------------
-- | constants
-- +----------------------------------------------------------------------------
-- NONE
-- +----------------------------------------------------------------------------
-- | components
-- +----------------------------------------------------------------------------
-- NONE
-- +----------------------------------------------------------------------------
-- | internal signals
-- +----------------------------------------------------------------------------
signal int_cntr_val_temp : std_logic_vector(9 downto 0); -- internal length counter
signal int_len_is_odd : std_logic; -- =1 if length is odd else 0
signal int_c_wr : std_logic; -- =0 cpl, =1 write/read
signal int_is_read : std_logic; -- =1 if transfer is a read, else 0
signal int_aligned : std_logic; -- =1 if data is QWORD aligned else 0
signal int_tag_rcvd : std_logic; -- =1 if tag number for last of multiple
-- completions is received, else 0
-------------------------------------
-- signals to register port signals
-------------------------------------
signal int_rxstvalid0_q : std_logic;
signal int_rxstdata0_q : std_logic_vector(63 downto 0);
signal int_rxstsop0_q : std_logic;
signal int_sopqi_q : std_logic;
begin
-- +----------------------------------------------------------------------------
-- | concurrent section
-- +----------------------------------------------------------------------------
len_cntr_val_o <= int_cntr_val_temp;
-- +----------------------------------------------------------------------------
-- | process section
-- +----------------------------------------------------------------------------
------------------------------------------
-- process to register necessary signals
------------------------------------------
reg_proc : process(rst_i, clk_i)
begin
if rst_i = '1' then
int_rxstvalid0_q <= '0';
int_rxstdata0_q <= (others => '0');
int_rxstsop0_q <= '0';
int_sopqi_q <= '0';
elsif clk_i'event and clk_i = '1' then
int_rxstvalid0_q <= rx_st_valid0;
int_rxstsop0_q <= rx_st_sop0;
int_sopqi_q <= sop_q_i;
if rx_st_valid0 = '1' then
int_rxstdata0_q <= rx_st_data0;
end if;
end if;
end process reg_proc;
main : process(rst_i, clk_i)
begin
if rst_i = '1' then
rx_fifo_in_o <= (others => '0');
tag_nbr_o <= (others => '0');
tag_rcvd_o <= '0';
type_fmt_err_o <= (others => '0');
int_c_wr <= '0';
int_is_read <= '0';
int_tag_rcvd <= '0';
int_cntr_val_temp <= (others => '0');
int_len_is_odd <= '0';
int_aligned <= '0';
elsif clk_i'event and clk_i = '1' then
------------------------------------------------------
-- tag_rcvd_o must be a registered version of
-- int_tag_rcvd because the tag nbr for completions
-- can be stored one clock cycle later than
-- for memory writes/reads
------------------------------------------------------
tag_rcvd_o <= int_tag_rcvd;
if rx_st_valid0 = '1' then
if rx_st_sop0 = '1' then
int_len_is_odd <= rx_st_data0(0);
int_aligned <= int_aligned;
if rx_st_data0(28 downto 24) = TYPE_IS_CPL then
int_c_wr <= '0';
-----------------------------------------
-- check if this is the last completion
-- byte count value must be the same or
-- less than length value *4
-----------------------------------------
if rx_st_data0(43 downto 32) <= rx_st_data0(9 downto 0) & "00" then
int_tag_rcvd <= '1';
else
int_tag_rcvd <= '0';
end if;
elsif (rx_st_data0(28 downto 24) = TYPE_IS_MEMORY or rx_st_data0(28 downto 24) = TYPE_IS_IO) then
int_c_wr <= '1';
tag_nbr_o <= rx_st_data0(47 downto 40);
end if;
if rx_st_data0(31 downto 29) = FMT_IS_READ then
int_is_read <= '1';
else
int_is_read <= '0';
end if;
---------------------------------------------
-- check if a type or format error occurred
-- if I/O length is ok
-- and if a completion error occurred
---------------------------------------------
case rx_st_data0(31 downto 24) is
when "00000000" | "01000000" => -- memory
type_fmt_err_o <= (others => '0');
when "00000010" | "01000010" => -- I/O
if(rx_st_data0(9 downto 0) > "0000000001") then -- I/O requests must have length = 1
type_fmt_err_o <= "01";
else
type_fmt_err_o <= (others => '0');
end if;
when "00001010" => -- completion, no data
type_fmt_err_o <= (others => '0');
when "01001010" => -- completion, data
type_fmt_err_o <= (others => '0');
when "00110000" | "00110001" | "00110010" | "00110011" | -- message
"00110100" | "00110101" | "00110110" | "00110111" |
"01110000" | "01110001" | "01110010" | "01110011" |
"01110100" | "01110101" | "01110110" | "01110111" =>
type_fmt_err_o <= (others => '0');
when "00100000" | "00000001" | "00100001" | "01001100" | -- non-posted
"01101100" | "01001101" | "01101101" | "01001110" |
"01101110" =>
type_fmt_err_o <= "01";
when "01100000" => --posted
type_fmt_err_o <= "10";
when others =>
type_fmt_err_o <= "11"; -- e.g. TLP prefix or TCfg
end case;
------------------------------------------------------------------
-- calculate the amount of 64bit packets that must be stored to
-- the FIFO:
-- -> read length is always 2
-- -> 2 packets for the header information
-- -> length value divided by 2 because it represents the amount
-- of 32bit packets
-- length = 0 represents 1024DW otherwise as specified by length
------------------------------------------------------------------
if rx_st_data0(31 downto 29) = FMT_IS_READ then
int_cntr_val_temp <= std_logic_vector(to_unsigned(2,10));
elsif rx_st_data0(9 downto 0) = ZERO_10B then
int_cntr_val_temp <= std_logic_vector(unsigned('1' & rx_st_data0(9 downto 1)) + to_unsigned(2,10));
else
int_cntr_val_temp <= std_logic_vector(unsigned('0' & rx_st_data0(9 downto 1)) + to_unsigned(2,10));
end if;
elsif sop_q_i = '1' then
-------------------------------------------
-- reset int_tag_rcvd value one clock cycle
-- after it was asserted
-------------------------------------------
int_tag_rcvd <= '0';
if int_c_wr = '0' then
tag_nbr_o <= rx_st_data0(15 downto 8);
end if;
if int_rxstdata0_q(2) = '0' then
int_aligned <= '1';
else
int_aligned <= '0';
end if;
----------------------------------------------------------------
-- set counter value to temp value +1 if length is odd and
-- data is aligned
-- otherwise set counter value to temp value
-- don't change counter for read transactions
----------------------------------------------------------------
if int_is_read = '0' and int_len_is_odd = '1' and rx_st_data0(2) = '0' then
int_cntr_val_temp <= std_logic_vector(unsigned(int_cntr_val_temp) + to_unsigned(1,10));
else
int_cntr_val_temp <= int_cntr_val_temp;
end if;
else
int_len_is_odd <= int_len_is_odd;
int_cntr_val_temp <= int_cntr_val_temp;
int_aligned <= int_aligned;
end if;
else
int_len_is_odd <= int_len_is_odd;
int_aligned <= int_aligned;
end if;
if int_rxstvalid0_q = '1' and int_rxstsop0_q = '1' then
int_aligned <= '0';
if int_rxstdata0_q(28 downto 24) = TYPE_IS_MEMORY or int_rxstdata0_q(28 downto 24) = TYPE_IS_IO then
-------------------------------------------------------------------------
-- data alignment in FIFO for writes or reads
-- h : header information stored to FIFO
-- d : data packet stored to FIFO
-- x : data at this position is invalid (can differ from 0)
--+---------+--------------+--------------+--------------+--------------+
--| | aligned | aligned | not aligned | not aligned |
--| | even length | odd length | even length | odd length |
--+---------+--------------+--------------+--------------+--------------+
--| RX FIFO | | | | | | | | | | | | |
--| 63 | | | | | | | | | | | | |
--| ... | h1 | x | d1 | h1 | x | x | h1 | d0 | x | h1 | d0 | d2 |
--| 32 | | | | | | | | | | | | |
--|---------|----|----|----|----|----|----|----|----|----|----|----|----|
--| 31 | | | | | | | | | | | | |
--| ... | h0 | h2 | d0 | h0 | h2 | d0 | h0 | h2 | d1 | h0 | h2 | d1 |
--| 0 | | | | | | | | | | | | |
--+---------+----+----+----+----+----+----+----+----+----+----+----+----+
-------------------------------------------
-- store header for write or read to FIFO
-------------------------------------------
rx_fifo_in_o(63 downto 54) <= (others => '0'); -- R
rx_fifo_in_o(53 downto 51) <= int_rxstdata0_q(18) & int_rxstdata0_q(13 downto 12); -- Attr
rx_fifo_in_o(50 downto 48) <= int_rxstdata0_q(22 downto 20); -- TC
rx_fifo_in_o(47 downto 32) <= int_rxstdata0_q(63 downto 48); -- requester ID
rx_fifo_in_o(31) <= int_rxstdata0_q(30); -- write flag
if int_rxstdata0_q(28 downto 24) = TYPE_IS_IO then
rx_fifo_in_o(30) <= '1'; -- I/O flag
else
rx_fifo_in_o(30) <= '0';
end if;
rx_fifo_in_o(29) <= '0'; -- R
---------------------------------------
-- decode and store which BAR was hit
---------------------------------------
case rx_st_bardec0 is
when "00000001" =>
rx_fifo_in_o(28 downto 26) <= "000"; -- BAR0 hit
when "00000010" =>
rx_fifo_in_o(28 downto 26) <= "001"; -- BAR1 hit
when "00000100" =>
rx_fifo_in_o(28 downto 26) <= "010"; -- BAR2 hit
when "00001000" =>
rx_fifo_in_o(28 downto 26) <= "011"; -- BAR3 hit
when "00010000" =>
rx_fifo_in_o(28 downto 26) <= "100"; -- BAR4 hit
when "00100000" =>
rx_fifo_in_o(28 downto 26) <= "101"; -- BAR5 hit
when "01000000" =>
rx_fifo_in_o(28 downto 26) <= "110"; -- expansion ROM hit
when others =>
rx_fifo_in_o(28 downto 26) <= "111"; -- no BAR hit / reserved
end case;
rx_fifo_in_o(25 downto 18) <= int_rxstdata0_q(47 downto 40); -- tag ID
rx_fifo_in_o(17 downto 14) <= int_rxstdata0_q(35 downto 32); -- first DW BE
rx_fifo_in_o(13 downto 10) <= int_rxstdata0_q(39 downto 36); -- last DW BE
rx_fifo_in_o(9 downto 0) <= int_rxstdata0_q(9 downto 0); -- length
elsif int_rxstdata0_q(28 downto 24) = TYPE_IS_CPL then
-------------------------------------------------------------------------
-- data alignment in FIFO for completions
-- h : header information stored to FIFO
-- d : data packet stored to FIFO
-- x : data at this position is invalid (can differ from 0)
--+---------+--------------+--------------+--------------+--------------+
--| | aligned | aligned | not aligned | not aligned |
--| | even length | odd length | even length | odd length |
--+---------+--------------+--------------+--------------+--------------+
--| RX FIFO | | | | | | | | | | | | |
--| 63 | | | | | | | | | | | | |
--| ... | x | x | d1 | x | x | x | x | d0 | x | x | d0 | d2 |
--| 32 | | | | | | | | | | | | |
--|---------|----|----|----|----|----|----|----|----|----|----|----|----|
--| 31 | | | | | | | | | | | | |
--| ... | h0 | x | d0 | h0 | x | d0 | h0 | x | d1 | h0 | x | d1 |
--| 0 | | | | | | | | | | | | |
--+---------+----+----+----+----+----+----+----+----+----+----+----+----+
----------------------------------------
-- store header for completion to FIFO
----------------------------------------
rx_fifo_in_o(63 downto 22) <= (others => '0'); -- R
rx_fifo_in_o(21 downto 10) <= int_rxstdata0_q(43 downto 32); -- byte count
rx_fifo_in_o(9 downto 0) <= int_rxstdata0_q(9 downto 0); -- length
end if;
elsif int_rxstvalid0_q = '1' and int_sopqi_q = '1' then
rx_fifo_in_o <= int_rxstdata0_q; -- address and D0 or R
elsif int_rxstvalid0_q = '1' then
rx_fifo_in_o <= int_rxstdata0_q;
end if;
end if;
end process main;
-- +----------------------------------------------------------------------------
-- | component instantiation
-- +----------------------------------------------------------------------------
-- NONE
-------------------------------------------------------------------------------
end architecture rx_get_data_arch;
|
package TestPkg is
generic (
G_TEST : positive := 8
);
end package TestPkg;
package body TestPkg is
procedure TestReport is
begin
report "G_TEST :" & to_string(G_TEST);
end procedure;
end package body;
|
package TestPkg is
generic (
G_TEST : positive := 8
);
end package TestPkg;
package body TestPkg is
procedure TestReport is
begin
report "G_TEST :" & to_string(G_TEST);
end procedure;
end package body;
|
-------------------------------------------------------------------------
-- TEST_BENCH PARA SIMULACAO DA SERIAL
-- Simular por 100 microssegundos
-------------------------------------------------------------------------
library ieee;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;
entity serial_tb is
end serial_tb;
architecture serial_tb of serial_tb is
signal sckg, reset, txd, rx_start, rxd :std_logic;
signal av, ack: std_logic;
signal Sin, Sout : std_logic_vector(7 downto 0);
constant B1 : time := 1000 ns;
constant B2 : time := B1*2;
constant B3 : time := B1*3;
constant B4 : time := B1*4;
constant B5 : time := B1*5;
constant B6 : time := B1*6;
constant B7 : time := B1*7;
constant B8 : time := B1*8;
constant B9 : time := B1*9;
constant B10 : time := B1*10;
begin
-------------------------------------------------------------------------------------
serial_inst : entity work.serialinterface port map (
clock => sckg,
reset => reset,
rx_data => sin,
rx_start => rx_start,
rx_busy => ack,
rxd => rxd,
txd => txd,
tx_data => sout,
tx_av => av
);
-------------------------------------------------------------------------------------
-- Processo que simula o hospedeiro enviando dados para o periférico.
-- Manda-se dados depois que a simulação já está executando por 20 microssegundos.
--
-- Assume-se que antes disto o periférico já programou a velocidade da interface
-- serial para adaptá-la a sua velocidade (ver abaixo o processo que simula o
-- periférico)
--
-- Envia-se 4 valores de 8 bits na seguinte ordem, a intervalos de 20 microssegundos:
-- 0x37, 0x9A, 0x00 e 0xFF
--
-- O processo está concluído após uns 100 microssegundos.
-------------------------------------------------------------------------------------
sin <=(others=>'0'),
x"37" after 20 us, x"9A" after 40 us,
x"00" after 60 us, x"FF" after 80 us;
rx_start <= '0', '1' after 20020 ns, '0' after 20070 ns,
'1' after 42020 ns, '0' after 42090 ns,
'1' after 62020 ns, '0' after 62090 ns,
'1' after 82020 ns, '0' after 82090 ns;
-------------------------------------------------------------------------------------
-- Processo de geração do clock para o hospedeiro e para a interface serial. O clock
-- apresenta uma frequencia em torno de 30MHz
-------------------------------------------------------------------------------------
process -- gera o clock
begin
sckg <= '1', '0' after 16.66 ns;
wait for 33ns;
end process;
reset <='1', '0' after 20ns; -- gera o reset
-------------------------------------------------------------------------------------
-- Processo que simula o periférico enviando dados para o hospedeiro.
-- Primeiro o periférico programa a MEF de autobaud, enviando o valor de
-- aferição de velocidade 0x55H. Em seguida o processo envia 4 valores de 8 bits:
-- 0x87, 0x5F, 0x00 e 0xFF
-- O processo está concluído após 56,496 microssegundos.
-- Se a simulação continuar depois de uns 100 microssegundos o processo de
-- envio do periférico começa a ser repetido.
-------------------------------------------------------------------------------------
process -- 55H (valor de aferição), 87H, 5FH, 00H, FFH
begin
txd <= '1', '0' after B1, '1' after B2,
'0' after B3, '1' after B4,
'0' after B5, '1' after B6,
'0' after B7, '1' after B8,
'0' after B9, '1' after B10;
wait for B1*11;
txd <= '0', '1' after B1,
'1' after B2, '1' after B3,
'0' after B4, '0' after B5,
'0' after B6, '0' after B7,
'1' after B8, '1' after B9;
wait for B1*10;
txd <= '0', '1' after B1,
'1' after B2, '1' after B3,
'1' after B4, '1' after B5,
'0' after B6, '1' after B7,
'0' after B8, '1' after B9;
wait for B1*16;
txd <= '0', '0' after B1,
'0' after B2, '0' after B3,
'0' after B4, '0' after B5,
'0' after B6, '0' after B7,
'0' after B8, '1' after B9;
wait for B1*10;
txd <= '0', '1' after B1,
'1' after B2, '1' after B3,
'1' after B4, '1' after B5,
'1' after B6, '1' after B7,
'1' after B8, '1' after B9;
wait for B1*10;
wait for 50us; -- acrescentado para evitar que processo repita depois de apenas uns
-- 50 microssegundos
end process;
end serial_tb; |
--------------------------------------------------------------------------------
--
-- Copyright 2015 PMC-Sierra, Inc.
--
-- Licensed under the Apache License, Version 2.0 (the "License"); you
-- may not use this file except in compliance with the License. You may
-- obtain a copy of the License at
-- http://www.apache.org/licenses/LICENSE-2.0 Unless required by
-- applicable law or agreed to in writing, software distributed under the
-- License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-- CONDITIONS OF ANY KIND, either express or implied. See the License for
-- the specific language governing permissions and limitations under the
-- License.
--
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- Company: PMC-Sierra, Inc.
-- Engineer: Logan Gunthorpe
--
-- Description:
-- LFSR Processor. Write free flowing LFSR data, discard
-- any read data.
--
--------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity proc_lfsr is
port (
clk : in std_logic;
en : in std_logic;
idata : in std_logic_vector(0 to 511);
ivalid : in std_logic;
idone : in std_logic;
iready : out std_logic;
odata : out std_logic_vector(0 to 511);
ovalid : out std_logic;
odirty : out std_logic;
oready : in std_logic;
odone : out std_logic;
len : in unsigned(0 to 31);
reg_lfsr_seed : in std_logic_vector(0 to 63);
reg_lfsr_seed_set : in std_logic
);
end entity proc_lfsr;
architecture main of proc_lfsr is
signal lfsr_d : std_logic_vector(0 to 511);
signal count : unsigned(0 to 30);
signal ovalid_i : std_logic;
component lfsr is
port (
clk : in std_logic;
reset : in std_logic;
i_seed : in std_logic_vector(127 downto 0);
i_init : in std_logic;
i_advance : in std_logic;
o_lfsr : out std_logic_vector(511 downto 0)
);
end component lfsr;
signal seed : std_logic_vector(127 downto 0) := (others=>'1');
begin
ovalid <= ovalid_i;
seed(63 downto 0) <= reg_lfsr_seed;
lfsr_i: component lfsr
port map (
clk => clk,
reset => '0',
i_seed => seed,
i_init => reg_lfsr_seed_set,
i_advance => '1',
o_lfsr => lfsr_d);
process (clk) is
variable vcount : unsigned(count'range);
begin
if rising_edge(clk) then
if en = '0' then
iready <= '0';
odata <= (others=>'0');
ovalid_i <= '0';
odirty <= '0';
odone <= '0';
count <= (others=>'0');
else
iready <= '1';
odata <= lfsr_d;
odirty <= '0';
vcount := count;
if oready = '1' and ovalid_i = '1' then
vcount := vcount + 1;
end if;
count <= vcount;
if vcount < (len&'0') then
odone <= '0';
ovalid_i <= '1';
else
odone <= '1';
ovalid_i <= '0';
end if;
end if;
end if;
end process;
end architecture main;
|
architecture rtl of fifo is
begin
my_signal <= '1' when input = "00" else
my_signal2 or my_sig3 when input = "01" else
my_sig4 and my_sig5 when input = "10" else
'0';
my_signal <= '1' when input = "0000" else
my_signal2 or my_sig3 when input = "0100" and input = "1100" else
my_sig4 when input = "0010" else
'0';
my_signal <= '1' when input(1 downto 0) = "00" and func1(func2(G_VALUE1),
to_integer(cons1(37 downto 0))) = 256 else
'0' when input(3 downto 0) = "0010" else
'Z';
my_signal <= '1' when input(1 downto
0) = "00" and func1(func2(G_VALUE1),
to_integer(cons1(37 downto 0))) = 256 else
'0' when input(3 downto 0) = "0010" else
'Z';
my_signal <= '1' when a = "0000" and func1(345) or
b = "1000" and func2(567) and
c = "00" else
sig1 when a = "1000" and func2(560) and
b = "0010" else
'0';
my_signal <= '1' when input(1 downto
0) = "00" and func1(func2(G_VALUE1),
to_integer(cons1(37 downto 0))) = 256 else
my_signal when input(3 downto 0) = "0010" else
'Z';
-- Testing no code after assignment
my_signal <=
'1' when input(1 downto
0) = "00" and func1(func2(G_VALUE1),
to_integer(cons1(37 downto 0))) = 256 else
my_signal when input(3 downto 0) = "0010" else
'Z';
my_signal <=
(others => '0') when input(1 downto
0) = "00" and func1(func2(G_VALUE1),
to_integer(cons1(37 downto 0))) = 256 else
my_signal when input(3 downto 0) = "0010" else
'Z';
end architecture rtl;
|
architecture rtl of fifo is
begin
my_signal <= '1' when input = "00" else
my_signal2 or my_sig3 when input = "01" else
my_sig4 and my_sig5 when input = "10" else
'0';
my_signal <= '1' when input = "0000" else
my_signal2 or my_sig3 when input = "0100" and input = "1100" else
my_sig4 when input = "0010" else
'0';
my_signal <= '1' when input(1 downto 0) = "00" and func1(func2(G_VALUE1),
to_integer(cons1(37 downto 0))) = 256 else
'0' when input(3 downto 0) = "0010" else
'Z';
my_signal <= '1' when input(1 downto
0) = "00" and func1(func2(G_VALUE1),
to_integer(cons1(37 downto 0))) = 256 else
'0' when input(3 downto 0) = "0010" else
'Z';
my_signal <= '1' when a = "0000" and func1(345) or
b = "1000" and func2(567) and
c = "00" else
sig1 when a = "1000" and func2(560) and
b = "0010" else
'0';
my_signal <= '1' when input(1 downto
0) = "00" and func1(func2(G_VALUE1),
to_integer(cons1(37 downto 0))) = 256 else
my_signal when input(3 downto 0) = "0010" else
'Z';
-- Testing no code after assignment
my_signal <=
'1' when input(1 downto
0) = "00" and func1(func2(G_VALUE1),
to_integer(cons1(37 downto 0))) = 256 else
my_signal when input(3 downto 0) = "0010" else
'Z';
my_signal <=
(others => '0') when input(1 downto
0) = "00" and func1(func2(G_VALUE1),
to_integer(cons1(37 downto 0))) = 256 else
my_signal when input(3 downto 0) = "0010" else
'Z';
end architecture rtl;
|
------------------------------------------------------------------
-- _____
-- / \
-- /____ \____
-- / \===\ \==/
-- /___\===\___\/ AVNET
-- \======/
-- \====/
-----------------------------------------------------------------
--
-- This design is the property of Avnet. Publication of this
-- design is not authorized without written consent from Avnet.
--
-- Please direct any questions to: [email protected]
--
-- Disclaimer:
-- Avnet, Inc. makes no warranty for the use of this code or design.
-- This code is provided "As Is". Avnet, Inc assumes no responsibility for
-- any errors, which may appear in this code, nor does it make a commitment
-- to update the information contained herein. Avnet, Inc specifically
-- disclaims any implied warranties of fitness for a particular purpose.
-- Copyright(c) 2010 Avnet, Inc.
-- All rights reserved.
--
------------------------------------------------------------------
--
-- Create Date: Feb 18, 2010
-- Design Name: IVK
-- Module Name: ivk_video_det\user_logic.vhd
-- Project Name: IVK
-- Target Devices: Spartan-6
-- Avnet Boards: IVK
--
-- Tool versions: ISE 12.1
--
-- Description:
--
-- Dependencies:
--
-- Revision: Feb 18, 2010: 1.01 Initial version
-- Mar 02, 2010: 1.02 Add optionnal VDMA Write Port
-- Mar 10, 2010: 1.04 Force FSYNC to active high polarity
-- Apr 13, 2010: 1.05 Add support for 16bit data width on XSVI input
-- May 14, 2010: 2.01 Update for 12.1
--
------------------------------------------------------------------
-- DO NOT EDIT BELOW THIS LINE --------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
library proc_common_v3_00_a;
use proc_common_v3_00_a.proc_common_pkg.all;
-- DO NOT EDIT ABOVE THIS LINE --------------------
--USER libraries added here
------------------------------------------------------------------------------
-- Entity section
------------------------------------------------------------------------------
-- Definition of Generics:
-- C_SLV_DWIDTH -- Slave interface data bus width
-- C_NUM_REG -- Number of software accessible registers
--
-- Definition of Ports:
-- Bus2IP_Clk -- Bus to IP clock
-- Bus2IP_Reset -- Bus to IP reset
-- Bus2IP_Data -- Bus to IP data bus
-- Bus2IP_BE -- Bus to IP byte enables
-- Bus2IP_RdCE -- Bus to IP read chip enable
-- Bus2IP_WrCE -- Bus to IP write chip enable
-- IP2Bus_Data -- IP to Bus data bus
-- IP2Bus_RdAck -- IP to Bus read transfer acknowledgement
-- IP2Bus_WrAck -- IP to Bus write transfer acknowledgement
-- IP2Bus_Error -- IP to Bus error response
------------------------------------------------------------------------------
entity user_logic is
generic
(
-- ADD USER GENERICS BELOW THIS LINE ---------------
C_GEN_FSYNC : integer := 0;
C_GEN_XSVI_OUT : integer := 1;
C_GEN_WD_VDMA : integer := 0;
--C_VIDEO_INTERFACE : integer := 0;
C_XSVII_DATA_WIDTH : integer := 24;
C_XSVIO_DATA_WIDTH : integer := 24;
C_VDMA_DATA_WIDTH : integer := 32;
-- ADD USER GENERICS ABOVE THIS LINE ---------------
-- DO NOT EDIT BELOW THIS LINE ---------------------
-- Bus protocol parameters, do not add to or delete
C_SLV_DWIDTH : integer := 32;
C_NUM_REG : integer := 4;
C_FAMILY : string := "spartan6"
-- DO NOT EDIT ABOVE THIS LINE ---------------------
);
port
(
-- ADD USER PORTS BELOW THIS LINE ------------------
-- Global Reset (asynchronous)
reset : in std_logic;
clk : in std_logic;
-- XSVI Input Port
xsvi_vsync_i : in std_logic;
xsvi_hsync_i : in std_logic;
xsvi_vblank_i : in std_logic;
xsvi_hblank_i : in std_logic;
xsvi_active_video_i : in std_logic;
xsvi_video_data_i : in std_logic_vector((C_XSVII_DATA_WIDTH-1) downto 0);
-- XSVI Output Port
xsvi_vsync_o : out std_logic;
xsvi_hsync_o : out std_logic;
xsvi_vblank_o : out std_logic;
xsvi_hblank_o : out std_logic;
xsvi_active_video_o : out std_logic;
xsvi_video_data_o : out std_logic_vector((C_XSVIO_DATA_WIDTH-1) downto 0);
-- VDMA Write Port
--vdma_wcmd_clk : out std_logic;
vdma_wd_clk : out std_logic;
vdma_wd_write : out std_logic;
vdma_wd_data : out std_logic_vector((C_VDMA_DATA_WIDTH-1) downto 0);
vdma_wd_data_be : out std_logic_vector(((C_VDMA_DATA_WIDTH/8)-1) downto 0);
-- Frame Sync Output Port
fsync_o : out std_logic;
-- Debug Ports
debug1_o : out std_logic_vector((5+C_XSVII_DATA_WIDTH-1) downto 0);
debug2_o : out std_logic_vector(31 downto 0);
-- ADD USER PORTS ABOVE THIS LINE ------------------
-- DO NOT EDIT BELOW THIS LINE ---------------------
-- Bus protocol ports, do not add to or delete
Bus2IP_Clk : in std_logic;
Bus2IP_Reset : in std_logic;
Bus2IP_Data : in std_logic_vector(0 to C_SLV_DWIDTH-1);
Bus2IP_BE : in std_logic_vector(0 to C_SLV_DWIDTH/8-1);
Bus2IP_RdCE : in std_logic_vector(0 to C_NUM_REG-1);
Bus2IP_WrCE : in std_logic_vector(0 to C_NUM_REG-1);
IP2Bus_Data : out std_logic_vector(0 to C_SLV_DWIDTH-1);
IP2Bus_RdAck : out std_logic;
IP2Bus_WrAck : out std_logic;
IP2Bus_Error : out std_logic
-- DO NOT EDIT ABOVE THIS LINE ---------------------
);
attribute SIGIS : string;
attribute SIGIS of Bus2IP_Clk : signal is "CLK";
attribute SIGIS of Bus2IP_Reset : signal is "RST";
end entity user_logic;
------------------------------------------------------------------------------
-- Architecture section
------------------------------------------------------------------------------
architecture rtl of user_logic is
function toLittleEndian (a : std_logic_vector) return std_logic_vector is
variable result : std_logic_vector(a'length-1 downto 0);
begin
for i in result'RANGE loop
result(i) := a(a'length-1-i);
end loop;
return result;
end;
function toBigEndian (a: std_logic_vector) return std_logic_vector is
variable result : std_logic_vector(0 to a'length-1);
begin
for i in result'RANGE loop
result(i) := a(a'length-1-i);
end loop;
return result;
end;
------------------------------------------
-- Signals for user logic slave model s/w accessible register example
------------------------------------------
signal slv_reg0 : std_logic_vector(0 to C_SLV_DWIDTH-1);
signal slv_reg1 : std_logic_vector(0 to C_SLV_DWIDTH-1);
signal slv_reg2 : std_logic_vector(0 to C_SLV_DWIDTH-1);
signal slv_reg3 : std_logic_vector(0 to C_SLV_DWIDTH-1);
signal slv_reg_write_sel : std_logic_vector(0 to 3);
signal slv_reg_read_sel : std_logic_vector(0 to 3);
signal slv_ip2bus_data : std_logic_vector(0 to C_SLV_DWIDTH-1);
signal slv_read_ack : std_logic;
signal slv_write_ack : std_logic;
-- signal dummy1_reg : std_logic_vector(31 downto 0);
-- signal dummy2_reg : std_logic_vector(31 downto 0);
-- signal dummy3_reg : std_logic_vector(31 downto 0);
-- signal dummy4_reg : std_logic_vector(31 downto 0);
--
-- XSVI Input Registers
--
signal xsvi_vsync_r : std_logic;
signal xsvi_hsync_r : std_logic;
signal xsvi_vblank_r : std_logic;
signal xsvi_hblank_r : std_logic;
signal xsvi_active_video_r : std_logic;
signal xsvi_video_data_r : std_logic_vector((C_XSVII_DATA_WIDTH-1) downto 0);
--
-- Video Dimension Counters
--
signal active_video_d1 : std_logic;
signal active_video_d2 : std_logic;
--
signal vsync_d1 : std_logic;
signal vsync_d2 : std_logic;
--
signal width_counter : unsigned(15 downto 0);
signal height_counter : unsigned(15 downto 0);
signal video_width : std_logic_vector(15 downto 0);
signal video_height : std_logic_vector(15 downto 0);
--
-- Vsync Polarity Detection
--
signal vsync_polarity : std_logic;
begin
--USER logic implementation added here
------------------------------------------
-- Example code to read/write user logic slave model s/w accessible registers
--
-- Note:
-- The example code presented here is to show you one way of reading/writing
-- software accessible registers implemented in the user logic slave model.
-- Each bit of the Bus2IP_WrCE/Bus2IP_RdCE signals is configured to correspond
-- to one software accessible register by the top level template. For example,
-- if you have four 32 bit software accessible registers in the user logic,
-- you are basically operating on the following memory mapped registers:
--
-- Bus2IP_WrCE/Bus2IP_RdCE Memory Mapped Register
-- "10000000" C_BASEADDR + 0x00
-- "01000000" C_BASEADDR + 0x04
-- "00100000" C_BASEADDR + 0x08
-- "00010000" C_BASEADDR + 0x0C
-- "00001000" C_BASEADDR + 0x10
-- "00000100" C_BASEADDR + 0x14
-- "00000010" C_BASEADDR + 0x18
-- "00000001" C_BASEADDR + 0x1C
--
------------------------------------------
slv_reg_write_sel <= Bus2IP_WrCE(0 to C_NUM_REG-1);
slv_reg_read_sel <= Bus2IP_RdCE(0 to C_NUM_REG-1);
slv_write_ack <= Bus2IP_WrCE(0) or Bus2IP_WrCE(1) or Bus2IP_WrCE(2) or Bus2IP_WrCE(3);
slv_read_ack <= Bus2IP_RdCE(0) or Bus2IP_RdCE(1) or Bus2IP_RdCE(2) or Bus2IP_RdCE(3);
-- implement slave model software accessible register(s)
SLAVE_REG_WRITE_PROC : process( Bus2IP_Clk ) is
begin
if Bus2IP_Clk'event and Bus2IP_Clk = '1' then
if Bus2IP_Reset = '1' then
slv_reg0 <= (others => '0');
slv_reg1 <= (others => '0');
slv_reg2 <= (others => '0');
slv_reg3 <= (others => '0');
else
case slv_reg_write_sel is
when "1000" =>
for byte_index in 0 to (C_SLV_DWIDTH/8)-1 loop
if ( Bus2IP_BE(byte_index) = '1' ) then
slv_reg0(byte_index*8 to byte_index*8+7) <= Bus2IP_Data(byte_index*8 to byte_index*8+7);
end if;
end loop;
when "0100" =>
for byte_index in 0 to (C_SLV_DWIDTH/8)-1 loop
if ( Bus2IP_BE(byte_index) = '1' ) then
slv_reg1(byte_index*8 to byte_index*8+7) <= Bus2IP_Data(byte_index*8 to byte_index*8+7);
end if;
end loop;
when "0010" =>
for byte_index in 0 to (C_SLV_DWIDTH/8)-1 loop
if ( Bus2IP_BE(byte_index) = '1' ) then
slv_reg2(byte_index*8 to byte_index*8+7) <= Bus2IP_Data(byte_index*8 to byte_index*8+7);
end if;
end loop;
when "0001" =>
for byte_index in 0 to (C_SLV_DWIDTH/8)-1 loop
if ( Bus2IP_BE(byte_index) = '1' ) then
slv_reg3(byte_index*8 to byte_index*8+7) <= Bus2IP_Data(byte_index*8 to byte_index*8+7);
end if;
end loop;
when others => null;
end case;
end if;
end if;
end process SLAVE_REG_WRITE_PROC;
-- implement slave model software accessible register(s) read mux
SLAVE_REG_READ_PROC : process( slv_reg_read_sel ) is
begin
case slv_reg_read_sel is
-- when "1000" => slv_ip2bus_data <= toBigEndian(X"0000" & video_width);
-- when "0100" => slv_ip2bus_data <= toBigEndian(X"0000" & video_height);
when "1000" => slv_ip2bus_data <= X"0000" & video_width;
when "0100" => slv_ip2bus_data <= X"0000" & video_height;
when "0010" => slv_ip2bus_data <= slv_reg2;
when "0001" => slv_ip2bus_data <= slv_reg3;
when others => slv_ip2bus_data <= (others => '0');
end case;
end process SLAVE_REG_READ_PROC;
IP_REG_PROC : process(clk) is
begin
if rising_edge(clk) then
-- dummy1_reg <= toLittleEndian(slv_reg0);
-- dummy2_reg <= toLittleEndian(slv_reg1);
-- dummy3_reg <= toLittleEndian(slv_reg2);
-- dummy4_reg <= toLittleEndian(slv_reg3);
end if;
end process IP_REG_PROC;
------------------------------------------
-- Example code to drive IP to Bus signals
------------------------------------------
IP2Bus_Data <= slv_ip2bus_data when slv_read_ack = '1' else
(others => '0');
IP2Bus_WrAck <= slv_write_ack;
IP2Bus_RdAck <= slv_read_ack;
IP2Bus_Error <= '0';
--
-- XSVI Input Registers
--
xsvi_iregs_l : process (clk)
begin
if rising_edge( clk ) then
xsvi_vsync_r <= xsvi_vsync_i;
xsvi_hsync_r <= xsvi_hsync_i;
xsvi_vblank_r <= xsvi_vblank_i;
xsvi_hblank_r <= xsvi_hblank_i;
xsvi_active_video_r <= xsvi_active_video_i;
xsvi_video_data_r <= xsvi_video_data_i;
end if;
end process;
--
-- Video Dimension Counters
--
video_det_l : process (clk, reset)
begin
if ( reset = '1' ) then
active_video_d1 <= '0';
active_video_d2 <= '0';
--
vsync_d1 <= '0';
vsync_d2 <= '0';
--
width_counter <= (others => '0');
height_counter <= (others => '0');
video_width <= (others => '0');
video_height <= (others => '0');
elsif rising_edge( clk ) then
-- Horizontal Counter
-- - increment during active_video
-- - latch result and clear at falling edge of active_video
active_video_d1 <= xsvi_active_video_r;
active_video_d2 <= active_video_d1;
if ( xsvi_active_video_r = '1' ) then
width_counter <= width_counter + 1;
end if;
if ( active_video_d1 = '0' and active_video_d2 = '1' ) then
video_width <= std_logic_vector(width_counter);
width_counter <= (others => '0');
end if;
-- Vertical Counter
-- - increment at falling edge of active_video
-- - latch result and clear at rising_edge of vsync
vsync_d1 <= xsvi_vsync_r;
vsync_d2 <= vsync_d1;
if ( active_video_d1 = '0' and active_video_d2 = '1' ) then
height_counter <= height_counter + 1;
end if;
if ( vsync_d1 = '1' and vsync_d2 = '0' ) then
video_height <= std_logic_vector(height_counter);
height_counter <= (others => '0');
end if;
end if;
end process;
--
-- XSVI Output Port
--
xsvi_output_l : process (clk)
begin
if rising_edge( clk ) then
-- default values
xsvi_video_data_o <= (others => '0');
xsvi_vsync_o <= xsvi_vsync_r;
xsvi_hsync_o <= xsvi_hsync_r;
xsvi_vblank_o <= xsvi_vblank_r;
xsvi_hblank_o <= xsvi_hblank_r;
xsvi_active_video_o <= xsvi_active_video_r;
xsvi_video_data_o(C_XSVII_DATA_WIDTH-1 downto 0)
<= xsvi_video_data_r;
end if;
end process;
--
-- VDMA Write Port
--
--vdma_wcmd_clk <= clk;
vdma_wd_clk <= clk;
vdma_write_l : process (clk)
begin
if rising_edge( clk ) then
-- default values
vdma_wd_data <= (others => '0');
vdma_wd_write <= xsvi_active_video_r;
vdma_wd_data(C_XSVII_DATA_WIDTH-1 downto 0)
<= xsvi_video_data_r;
vdma_wd_data_be <= (others => '1');
end if;
end process;
--
-- Vsync Polarity Detection
--
vsync_polarity_l : process (clk)
begin
if rising_edge( clk ) then
if ( xsvi_active_video_r = '1' ) then
vsync_polarity <= not xsvi_vsync_r;
end if;
end if;
end process;
--
-- Frame Sync Output Port
--
fsync_l : process (clk)
begin
if rising_edge( clk ) then
if ( vsync_polarity = '1' ) then
fsync_o <= xsvi_vsync_r;
else
fsync_o <= not xsvi_vsync_r;
end if;
end if;
end process;
--
-- Debug Ports
--
debug_l : process (clk)
begin
if rising_edge( clk ) then
debug1_o <= xsvi_vsync_r & xsvi_hsync_r &
xsvi_vblank_r & xsvi_hblank_r &
xsvi_active_video_r &
xsvi_video_data_r;
debug2_o(31 downto 16) <= std_logic_vector(width_counter);
debug2_o(15 downto 0) <= std_logic_vector(height_counter);
end if;
end process;
end rtl;
|
-------------------------------------------------------------------------------
-- axi_vdma_vaddrreg_mux
-------------------------------------------------------------------------------
--
-- *************************************************************************
--
-- (c) Copyright 2010-2011, 2013 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--
-- *************************************************************************
--
-------------------------------------------------------------------------------
-- Filename: axi_vdma_vaddrreg_mux.vhd
--
-- Description: This entity contains the mux for driving current video start
-- address to DMA Controller.
--
-- VHDL-Standard: VHDL'93
-------------------------------------------------------------------------------
-- Structure:
-- axi_vdma.vhd
-- |- axi_vdma_pkg.vhd
-- |- axi_vdma_intrpt.vhd
-- |- axi_vdma_rst_module.vhd
-- | |- axi_vdma_reset.vhd (mm2s)
-- | | |- axi_vdma_cdc.vhd
-- | |- axi_vdma_reset.vhd (s2mm)
-- | | |- axi_vdma_cdc.vhd
-- |
-- |- axi_vdma_reg_if.vhd
-- | |- axi_vdma_lite_if.vhd
-- | |- axi_vdma_cdc.vhd (mm2s)
-- | |- axi_vdma_cdc.vhd (s2mm)
-- |
-- |- axi_vdma_sg_cdc.vhd (mm2s)
-- |- axi_vdma_vid_cdc.vhd (mm2s)
-- |- axi_vdma_fsync_gen.vhd (mm2s)
-- |- axi_vdma_sof_gen.vhd (mm2s)
-- |- axi_vdma_reg_module.vhd (mm2s)
-- | |- axi_vdma_register.vhd (mm2s)
-- | |- axi_vdma_regdirect.vhd (mm2s)
-- |- axi_vdma_mngr.vhd (mm2s)
-- | |- axi_vdma_sg_if.vhd (mm2s)
-- | |- axi_vdma_sm.vhd (mm2s)
-- | |- axi_vdma_cmdsts_if.vhd (mm2s)
-- | |- axi_vdma_vidreg_module.vhd (mm2s)
-- | | |- axi_vdma_sgregister.vhd (mm2s)
-- | | |- axi_vdma_vregister.vhd (mm2s)
-- | | |- axi_vdma_vaddrreg_mux.vhd (mm2s)
-- | | |- axi_vdma_blkmem.vhd (mm2s)
-- | |- axi_vdma_genlock_mngr.vhd (mm2s)
-- | |- axi_vdma_genlock_mux.vhd (mm2s)
-- | |- axi_vdma_greycoder.vhd (mm2s)
-- |- axi_vdma_mm2s_linebuf.vhd (mm2s)
-- | |- axi_vdma_sfifo_autord.vhd (mm2s)
-- | |- axi_vdma_afifo_autord.vhd (mm2s)
-- | |- axi_vdma_skid_buf.vhd (mm2s)
-- | |- axi_vdma_cdc.vhd (mm2s)
-- |
-- |- axi_vdma_sg_cdc.vhd (s2mm)
-- |- axi_vdma_vid_cdc.vhd (s2mm)
-- |- axi_vdma_fsync_gen.vhd (s2mm)
-- |- axi_vdma_sof_gen.vhd (s2mm)
-- |- axi_vdma_reg_module.vhd (s2mm)
-- | |- axi_vdma_register.vhd (s2mm)
-- | |- axi_vdma_regdirect.vhd (s2mm)
-- |- axi_vdma_mngr.vhd (s2mm)
-- | |- axi_vdma_sg_if.vhd (s2mm)
-- | |- axi_vdma_sm.vhd (s2mm)
-- | |- axi_vdma_cmdsts_if.vhd (s2mm)
-- | |- axi_vdma_vidreg_module.vhd (s2mm)
-- | | |- axi_vdma_sgregister.vhd (s2mm)
-- | | |- axi_vdma_vregister.vhd (s2mm)
-- | | |- axi_vdma_vaddrreg_mux.vhd (s2mm)
-- | | |- axi_vdma_blkmem.vhd (s2mm)
-- | |- axi_vdma_genlock_mngr.vhd (s2mm)
-- | |- axi_vdma_genlock_mux.vhd (s2mm)
-- | |- axi_vdma_greycoder.vhd (s2mm)
-- |- axi_vdma_s2mm_linebuf.vhd (s2mm)
-- | |- axi_vdma_sfifo_autord.vhd (s2mm)
-- | |- axi_vdma_afifo_autord.vhd (s2mm)
-- | |- axi_vdma_skid_buf.vhd (s2mm)
-- | |- axi_vdma_cdc.vhd (s2mm)
-- |
-- |- axi_datamover_v3_00_a.axi_datamover.vhd (FULL)
-- |- axi_sg_v3_00_a.axi_sg.vhd
--
-------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use ieee.std_logic_misc.all;
library unisim;
use unisim.vcomponents.all;
library axi_vdma_v6_2;
use axi_vdma_v6_2.axi_vdma_pkg.all;
-------------------------------------------------------------------------------
entity axi_vdma_vaddrreg_mux is
generic(
C_NUM_FSTORES : integer range 1 to 32 := 1 ;
-- Number of Frame Stores
C_ADDR_WIDTH : integer range 32 to 32 := 32
-- Start Address Width
);
port (
prmry_aclk : in std_logic ; --
prmry_resetn : in std_logic ; --
--
--
-- Current Frame Number --
frame_number : in std_logic_vector --
(FRAME_NUMBER_WIDTH-1 downto 0) ; --
--
-- Video Register Bank --
start_address_vid : in STARTADDR_ARRAY_TYPE --
(0 to C_NUM_FSTORES - 1) ; --
--
crnt_start_address : out std_logic_vector --
(C_ADDR_WIDTH - 1 downto 0) --
);
end axi_vdma_vaddrreg_mux;
-------------------------------------------------------------------------------
-- Architecture
-------------------------------------------------------------------------------
architecture implementation of axi_vdma_vaddrreg_mux is
attribute DowngradeIPIdentifiedWarnings: string;
attribute DowngradeIPIdentifiedWarnings of implementation : architecture is "yes";
-------------------------------------------------------------------------------
-- Functions
-------------------------------------------------------------------------------
-- No Functions Declared
-------------------------------------------------------------------------------
-- Constants Declarations
-------------------------------------------------------------------------------
-- No Constants Declared
-------------------------------------------------------------------------------
-- Signal / Type Declarations
-------------------------------------------------------------------------------
signal crnt_start_address_i : std_logic_vector(C_ADDR_WIDTH - 1 downto 0) := (others => '0');
--signal crnt_start_address_d1 : std_logic_vector(C_ADDR_WIDTH - 1 downto 0) := (others => '0');
--signal crnt_start_address_d2 : std_logic_vector(C_ADDR_WIDTH - 1 downto 0) := (others => '0');
signal frame_number_index : integer := 0;
-------------------------------------------------------------------------------
-- Begin architecture logic
-------------------------------------------------------------------------------
begin
frame_number_index <= to_integer(unsigned(frame_number));
crnt_start_address_i <= start_address_vid(frame_number_index);
-- Pipe line for fmax (dble to allow for adjustments later if need be)
-----REG_ADDR_OUT : process(prmry_aclk)
----- begin
----- if(prmry_aclk'EVENT and prmry_aclk = '1')then
----- if(prmry_resetn = '0')then
----- crnt_start_address_d1 <= (others => '0');
----- crnt_start_address_d2 <= (others => '0');
----- else
----- crnt_start_address_d1 <= crnt_start_address_i;
----- crnt_start_address_d2 <= crnt_start_address_d1;
----- end if;
----- end if;
----- end process REG_ADDR_OUT;
-----
------crnt_start_address <= crnt_start_address_d2;
crnt_start_address <= crnt_start_address_i;
end implementation;
|
-------------------------------------------------------------------------------
-- axi_vdma_vaddrreg_mux
-------------------------------------------------------------------------------
--
-- *************************************************************************
--
-- (c) Copyright 2010-2011, 2013 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--
-- *************************************************************************
--
-------------------------------------------------------------------------------
-- Filename: axi_vdma_vaddrreg_mux.vhd
--
-- Description: This entity contains the mux for driving current video start
-- address to DMA Controller.
--
-- VHDL-Standard: VHDL'93
-------------------------------------------------------------------------------
-- Structure:
-- axi_vdma.vhd
-- |- axi_vdma_pkg.vhd
-- |- axi_vdma_intrpt.vhd
-- |- axi_vdma_rst_module.vhd
-- | |- axi_vdma_reset.vhd (mm2s)
-- | | |- axi_vdma_cdc.vhd
-- | |- axi_vdma_reset.vhd (s2mm)
-- | | |- axi_vdma_cdc.vhd
-- |
-- |- axi_vdma_reg_if.vhd
-- | |- axi_vdma_lite_if.vhd
-- | |- axi_vdma_cdc.vhd (mm2s)
-- | |- axi_vdma_cdc.vhd (s2mm)
-- |
-- |- axi_vdma_sg_cdc.vhd (mm2s)
-- |- axi_vdma_vid_cdc.vhd (mm2s)
-- |- axi_vdma_fsync_gen.vhd (mm2s)
-- |- axi_vdma_sof_gen.vhd (mm2s)
-- |- axi_vdma_reg_module.vhd (mm2s)
-- | |- axi_vdma_register.vhd (mm2s)
-- | |- axi_vdma_regdirect.vhd (mm2s)
-- |- axi_vdma_mngr.vhd (mm2s)
-- | |- axi_vdma_sg_if.vhd (mm2s)
-- | |- axi_vdma_sm.vhd (mm2s)
-- | |- axi_vdma_cmdsts_if.vhd (mm2s)
-- | |- axi_vdma_vidreg_module.vhd (mm2s)
-- | | |- axi_vdma_sgregister.vhd (mm2s)
-- | | |- axi_vdma_vregister.vhd (mm2s)
-- | | |- axi_vdma_vaddrreg_mux.vhd (mm2s)
-- | | |- axi_vdma_blkmem.vhd (mm2s)
-- | |- axi_vdma_genlock_mngr.vhd (mm2s)
-- | |- axi_vdma_genlock_mux.vhd (mm2s)
-- | |- axi_vdma_greycoder.vhd (mm2s)
-- |- axi_vdma_mm2s_linebuf.vhd (mm2s)
-- | |- axi_vdma_sfifo_autord.vhd (mm2s)
-- | |- axi_vdma_afifo_autord.vhd (mm2s)
-- | |- axi_vdma_skid_buf.vhd (mm2s)
-- | |- axi_vdma_cdc.vhd (mm2s)
-- |
-- |- axi_vdma_sg_cdc.vhd (s2mm)
-- |- axi_vdma_vid_cdc.vhd (s2mm)
-- |- axi_vdma_fsync_gen.vhd (s2mm)
-- |- axi_vdma_sof_gen.vhd (s2mm)
-- |- axi_vdma_reg_module.vhd (s2mm)
-- | |- axi_vdma_register.vhd (s2mm)
-- | |- axi_vdma_regdirect.vhd (s2mm)
-- |- axi_vdma_mngr.vhd (s2mm)
-- | |- axi_vdma_sg_if.vhd (s2mm)
-- | |- axi_vdma_sm.vhd (s2mm)
-- | |- axi_vdma_cmdsts_if.vhd (s2mm)
-- | |- axi_vdma_vidreg_module.vhd (s2mm)
-- | | |- axi_vdma_sgregister.vhd (s2mm)
-- | | |- axi_vdma_vregister.vhd (s2mm)
-- | | |- axi_vdma_vaddrreg_mux.vhd (s2mm)
-- | | |- axi_vdma_blkmem.vhd (s2mm)
-- | |- axi_vdma_genlock_mngr.vhd (s2mm)
-- | |- axi_vdma_genlock_mux.vhd (s2mm)
-- | |- axi_vdma_greycoder.vhd (s2mm)
-- |- axi_vdma_s2mm_linebuf.vhd (s2mm)
-- | |- axi_vdma_sfifo_autord.vhd (s2mm)
-- | |- axi_vdma_afifo_autord.vhd (s2mm)
-- | |- axi_vdma_skid_buf.vhd (s2mm)
-- | |- axi_vdma_cdc.vhd (s2mm)
-- |
-- |- axi_datamover_v3_00_a.axi_datamover.vhd (FULL)
-- |- axi_sg_v3_00_a.axi_sg.vhd
--
-------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use ieee.std_logic_misc.all;
library unisim;
use unisim.vcomponents.all;
library axi_vdma_v6_2;
use axi_vdma_v6_2.axi_vdma_pkg.all;
-------------------------------------------------------------------------------
entity axi_vdma_vaddrreg_mux is
generic(
C_NUM_FSTORES : integer range 1 to 32 := 1 ;
-- Number of Frame Stores
C_ADDR_WIDTH : integer range 32 to 32 := 32
-- Start Address Width
);
port (
prmry_aclk : in std_logic ; --
prmry_resetn : in std_logic ; --
--
--
-- Current Frame Number --
frame_number : in std_logic_vector --
(FRAME_NUMBER_WIDTH-1 downto 0) ; --
--
-- Video Register Bank --
start_address_vid : in STARTADDR_ARRAY_TYPE --
(0 to C_NUM_FSTORES - 1) ; --
--
crnt_start_address : out std_logic_vector --
(C_ADDR_WIDTH - 1 downto 0) --
);
end axi_vdma_vaddrreg_mux;
-------------------------------------------------------------------------------
-- Architecture
-------------------------------------------------------------------------------
architecture implementation of axi_vdma_vaddrreg_mux is
attribute DowngradeIPIdentifiedWarnings: string;
attribute DowngradeIPIdentifiedWarnings of implementation : architecture is "yes";
-------------------------------------------------------------------------------
-- Functions
-------------------------------------------------------------------------------
-- No Functions Declared
-------------------------------------------------------------------------------
-- Constants Declarations
-------------------------------------------------------------------------------
-- No Constants Declared
-------------------------------------------------------------------------------
-- Signal / Type Declarations
-------------------------------------------------------------------------------
signal crnt_start_address_i : std_logic_vector(C_ADDR_WIDTH - 1 downto 0) := (others => '0');
--signal crnt_start_address_d1 : std_logic_vector(C_ADDR_WIDTH - 1 downto 0) := (others => '0');
--signal crnt_start_address_d2 : std_logic_vector(C_ADDR_WIDTH - 1 downto 0) := (others => '0');
signal frame_number_index : integer := 0;
-------------------------------------------------------------------------------
-- Begin architecture logic
-------------------------------------------------------------------------------
begin
frame_number_index <= to_integer(unsigned(frame_number));
crnt_start_address_i <= start_address_vid(frame_number_index);
-- Pipe line for fmax (dble to allow for adjustments later if need be)
-----REG_ADDR_OUT : process(prmry_aclk)
----- begin
----- if(prmry_aclk'EVENT and prmry_aclk = '1')then
----- if(prmry_resetn = '0')then
----- crnt_start_address_d1 <= (others => '0');
----- crnt_start_address_d2 <= (others => '0');
----- else
----- crnt_start_address_d1 <= crnt_start_address_i;
----- crnt_start_address_d2 <= crnt_start_address_d1;
----- end if;
----- end if;
----- end process REG_ADDR_OUT;
-----
------crnt_start_address <= crnt_start_address_d2;
crnt_start_address <= crnt_start_address_i;
end implementation;
|
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
USE ieee.std_logic_arith.ALL;
USE ieee.std_logic_unsigned.ALL;
ENTITY system IS
PORT(rst: IN std_logic; -- system reset, high active
clk: IN std_logic; -- system clock, 50 MHz, rising edge active
btn0: IN std_logic; -- push button, low active
rxd: IN std_logic; -- receiver signal
txd: OUT std_logic; -- transmitter signal
evn1: OUT std_logic; -- event1, interrupt, high active
evn2: OUT std_logic; -- event2, RETURNI, high active
led0: OUT std_logic; -- led, low active
led1: OUT std_logic); -- led, low active
END system;
library unisim;
use unisim.vcomponents.all;
ARCHITECTURE structure OF system IS
CONSTANT RSTDEF: std_ulogic := '1'; -- high active
COMPONENT FDSx2
PORT(D : IN std_ulogic; -- data input
Q : OUT std_ulogic; -- data output
S : IN std_ulogic; -- preset, high active
C : IN std_ulogic); -- clock, rising edge active
END COMPONENT;
COMPONENT timer
GENERIC(RSTDEF: std_logic);
PORT(rst: IN std_logic; -- reset, RSTDEF active
clk: IN std_logic; -- clock, rising edge active
irq: OUT std_logic; -- interrupt request, high active
iack: IN std_logic); -- interrupt acknowledge, high active
END COMPONENT;
COMPONENT kcpsm3
Port ( address : out std_logic_vector(9 downto 0);
instruction : in std_logic_vector(17 downto 0);
port_id : out std_logic_vector(7 downto 0);
write_strobe : out std_logic;
out_port : out std_logic_vector(7 downto 0);
read_strobe : out std_logic;
in_port : in std_logic_vector(7 downto 0);
interrupt : in std_logic;
interrupt_ack : out std_logic;
reset : in std_logic;
clk : in std_logic);
end COMPONENT;
COMPONENT programm
PORT ( address : in std_logic_vector(9 downto 0);
instruction : out std_logic_vector(17 downto 0);
clk : in std_logic);
END COMPONENT;
SIGNAL reset : std_logic; -- high active
SIGNAL sbtn0 : std_logic;
SIGNAL srxd : std_logic;
SIGNAL enable : std_logic_vector(8 DOWNTO 0);
SIGNAL led : std_logic_vector(1 DOWNTO 0);
SIGNAL en0 : std_logic;
SIGNAL en1 : std_logic;
SIGNAL address : std_logic_vector( 9 downto 0);
SIGNAL instruction : std_logic_vector(17 downto 0);
SIGNAL port_id : std_logic_vector( 7 downto 0);
SIGNAL write_strobe : std_logic; -- high active
SIGNAL out_port : std_logic_vector( 7 downto 0);
SIGNAL read_strobe : std_logic; -- high active
SIGNAL in_port : std_logic_vector( 7 downto 0);
SIGNAL interrupt : std_logic; -- high active
SIGNAL interrupt_ack : std_logic; -- high active
SIGNAL addra : std_logic_vector(10 DOWNTO 0);
SIGNAL dout : std_logic_vector( 7 DOWNTO 0);
SIGNAL wea : std_logic;
SIGNAL addrb : std_logic_vector(10 DOWNTO 0);
SIGNAL dib : std_logic_vector( 7 DOWNTO 0);
SIGNAL dob : std_logic_vector( 7 DOWNTO 0);
SIGNAL enb : std_logic;
SIGNAL web : std_logic;
BEGIN
-- -----------------------------------------------------------------------------
evn1 <= interrupt;
evn2 <= '1' WHEN instruction(17 DOWNTO 14)="1110" ELSE '0';
-- Resetgenarator und Synchronisation des Resetsignals mit dem System
sync_rst: FDSx2
PORT MAP(D => '0',
Q => reset,
S => rst,
C => clk);
-- -----------------------------------------------------------------------------
-- Synchronisation des Eingangssignals RXD mit dem System
sync_rxd: FDSx2
PORT MAP(D => rxd,
Q => srxd,
S => reset,
C => clk);
-- -----------------------------------------------------------------------------
-- Synchronisation des Eingangssignals BTN0 mit dem System
sync_btn0: FDSx2
PORT MAP(D => btn0,
Q => sbtn0,
S => reset,
C => clk);
-- -----------------------------------------------------------------------------
en1 <= enable(1) AND write_strobe;
-- Flipflop fuer das serielle Datenausgangssignal TXD
txd_ff: FDSE
--synthesis translate_off
generic map (INIT => '1')
--synthesis translate_on
PORT MAP(D => out_port(0),
Q => txd,
CE => en1,
S => reset,
C => clk);
en0 <= enable(0) AND write_strobe;
-- Flipflop fuer das Steuerungssignals der LED0
led0_ff: FDSE
--synthesis translate_off
generic map (INIT => '1')
--synthesis translate_on
PORT MAP(D => out_port(0),
Q => led(0),
CE => en0,
S => reset,
C => clk);
-- Flipflop fuer das Steuerungssignals der LED1
led1_ff: FDSE
--synthesis translate_off
generic map (INIT => '1')
--synthesis translate_on
PORT MAP(D => out_port(1),
Q => led(1),
CE => en0,
S => reset,
C => clk);
led0 <= led(0);
led1 <= led(1);
-- -----------------------------------------------------------------------------
-- Timer
t1: timer
GENERIC MAP(RSTDEF => RSTDEF)
PORT MAP(rst => reset,
clk => clk,
irq => interrupt,
iack => interrupt_ack);
-- -----------------------------------------------------------------------------
-- Dekoder
WITH port_id(3 DOWNTO 0) SELECT
enable <= "000000001" WHEN "0000",
"000000010" WHEN "0001",
"000000100" WHEN "0010",
"000001000" WHEN "0011",
"000010000" WHEN "0100",
"000100000" WHEN "0101",
"001000000" WHEN "0110",
"010000000" WHEN "0111",
"100000000" WHEN "1000",
"000000000" WHEN OTHERS;
WITH port_id(3 DOWNTO 0) SELECT
in_port <= "00000" & sbtn0 & led WHEN "0000",
"0000000" & srxd WHEN "0001",
addra(7 DOWNTO 0) WHEN "0010",
"00000" & addra(10 DOWNTO 8) WHEN "0011",
dout WHEN "0100",
"00000000" WHEN OTHERS;
-- -----------------------------------------------------------------------------
cpu: kcpsm3
PORT MAP(reset => reset,
clk => clk,
address => address,
instruction => instruction,
port_id => port_id,
write_strobe => write_strobe,
out_port => out_port,
read_strobe => read_strobe,
in_port => in_port,
interrupt => interrupt,
interrupt_ack => interrupt_ack);
-- -----------------------------------------------------------------------------
-- programm memory
rom: programm
PORT MAP(clk => clk,
address => address,
instruction => instruction);
-- -----------------------------------------------------------------------------
-- address register
PROCESS(rst, clk) IS
BEGIN
IF rst=RSTDEF THEN
addra <= (OTHERS => '0');
ELSIF rising_edge(clk) THEN
IF enable(2)='1' AND write_strobe='1' THEN
addra(7 DOWNTO 0) <= out_port;
END IF;
IF enable(3)='1' AND write_strobe='1' THEN
addra(10 DOWNTO 8) <= out_port(2 DOWNTO 0);
END IF;
END IF;
END PROCESS;
wea <= enable(4) AND write_strobe;
-- data memory
ram: RAMB16_S9_S9
PORT MAP (
-- interface to pico blaze
DOA => dout, -- Port A 8-bit Data Output
DOPA => open, -- Port A 1-bit Parity Output
ADDRA => addra, -- Port A 11-bit Address Input
CLKA => clk, -- Port A Clock
DIA => out_port, -- Port A 8-bit Data Input
DIPA => "0", -- Port A 1-bit parity Input
ENA => '1', -- Port A RAM Enable Input
SSRA => reset, -- Port A Synchronous Set/Reset Input
WEA => wea, -- Port A Write Enable Input
-- interface to co-processor
DOB => DOB, -- Port B 8-bit Data Output
DOPB => open, -- Port B 1-bit Parity Output
ADDRB => ADDRB, -- Port B 11-bit Address Input
CLKB => CLK, -- Port B Clock
DIB => DIB, -- Port B 8-bit Data Input
DIPB => "0", -- Port-B 1-bit parity Input
ENB => ENB, -- Port B RAM Enable Input
SSRB => reset, -- Port B Synchronous Set/Reset Input
WEB => WEB -- Port B Write Enable Input
);
WEB <= '0';
ENB <= '0';
DIB <= (OTHERS => '0');
ADDRB <= (OTHERS => '0');
END structure; |
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;
library work;
use work.all;
use work.procedures.all;
entity top is
port(
rst : in std_logic;
clk : in std_logic;
pc : out std_logic_vector(7 downto 0);
rx : in std_logic;
tx : out std_logic
);
end top;
architecture Structural of top is
signal rst_i : std_logic;
signal clk2x_i : std_logic;
signal clk_i : std_logic;
signal pc_i : std_logic_vector(7 downto 0);
signal rst_1 : std_logic;
signal rst_2 : std_logic;
signal rst_deb : std_logic;
signal cnt : unsigned(19 downto 0);
begin
process(clk_i)
begin
if rising_edge(clk_i) then
pc <= pc_i;
end if;
end process;
deb: process(clk_i)
begin
if rising_edge(clk_i) then
rst_1 <= rst;
rst_2 <= rst_1;
if rst_1 /= rst_2 then
cnt <= (others => '0');
elsif cnt(19) = '1' then
rst_deb <= rst_2;
else
cnt <= cnt + 1;
end if;
end if;
end process;
clkgen_i: entity work.clkgen
port map(
rsti => rst_deb,
clki => clk,
rsto => rst_i,
clko => clk_i,
clk2xo => clk2x_i
);
soc_i: entity work.soc
port map(
rst => rst_i,
clk => clk_i,
clk2x => clk2x_i,
pc => pc_i,
rx => rx,
tx => tx
);
end Structural;
|
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
--STEP 1
--This component takes 2 numbers written in scientific notation and returns the same 2 numbers specifying which has the biggest
--exponent and which has the smaller
entity number_swapper is
generic(
TOTAL_BITS : natural := 23;
EXP_BITS : natural := 6
);
port(
man_1_in : in std_logic_vector(TOTAL_BITS - EXP_BITS - 2 downto 0);
exp_1_in : in std_logic_vector(EXP_BITS - 1 downto 0);
man_2_in : in std_logic_vector(TOTAL_BITS - EXP_BITS - 2 downto 0);
exp_2_in : in std_logic_vector(EXP_BITS - 1 downto 0);
man_greater_out : out std_logic_vector(TOTAL_BITS - EXP_BITS - 2 downto 0);
man_smaller_out : out std_logic_vector(TOTAL_BITS - EXP_BITS - 2 downto 0);
exp_greater_out : out std_logic_vector(EXP_BITS - 1 downto 0);
exp_smaller_out : out std_logic_vector(EXP_BITS - 1 downto 0)
);
end number_swapper;
architecture number_swapper_arq of number_swapper is
begin
process(man_1_in,exp_1_in,man_2_in,exp_2_in) is
variable man_1_integer : integer := 0;
variable man_2_integer : integer := 0;
variable exp_1_integer : integer := 0;
variable exp_2_integer : integer := 0;
begin
man_1_integer := to_integer(unsigned(man_1_in));
man_2_integer := to_integer(unsigned(man_2_in));
exp_1_integer := to_integer(unsigned(exp_1_in));
exp_2_integer := to_integer(unsigned(exp_2_in));
if(exp_1_integer = exp_2_integer) then --compare mantissas
if(man_1_integer > man_2_integer) then
man_greater_out <= man_1_in;
man_smaller_out <= man_2_in;
exp_greater_out <= exp_1_in;
exp_smaller_out <= exp_2_in;
else
man_greater_out <= man_2_in;
man_smaller_out <= man_1_in;
exp_greater_out <= exp_2_in;
exp_smaller_out <= exp_1_in;
end if;
else
if(exp_1_integer > exp_2_integer) then
man_greater_out <= man_1_in;
man_smaller_out <= man_2_in;
exp_greater_out <= exp_1_in;
exp_smaller_out <= exp_2_in;
else
man_greater_out <= man_2_in;
man_smaller_out <= man_1_in;
exp_greater_out <= exp_2_in;
exp_smaller_out <= exp_1_in;
end if;
end if;
end process;
end;
|
library ieee;
use ieee.std_logic_1164.all;
-- This package is meant as a stop-gap solution while the boolean_vector type
-- specified in VHDL 2008 is not availabe in the used synthesis tools.
package basic_types_pkg is
type bool_vector is array (natural range <>) of boolean;
function std_logic_vector_from_bool_vector(bool_values: bool_vector) return std_logic_vector;
end;
package body basic_types_pkg is
function std_logic_vector_from_bool_vector(bool_values: bool_vector) return std_logic_vector is
variable slv_values: std_logic_vector(bool_values'range);
begin
for i in bool_values'range loop
if bool_values(i) then
slv_values(i) := '1';
else
slv_values(i) := '0';
end if;
end loop;
return slv_values;
end;
end; |
-------------------------------------------------------------------------------
-- system_clock_generator_0_wrapper.vhd
-------------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
library UNISIM;
use UNISIM.VCOMPONENTS.ALL;
library clock_generator_0_v4_03_a;
use clock_generator_0_v4_03_a.all;
library clock_generator_v4_03_a;
use clock_generator_v4_03_a.all;
entity system_clock_generator_0_wrapper is
port (
CLKIN : in std_logic;
CLKOUT0 : out std_logic;
CLKOUT1 : out std_logic;
CLKOUT2 : out std_logic;
CLKOUT3 : out std_logic;
CLKOUT4 : out std_logic;
CLKOUT5 : out std_logic;
CLKOUT6 : out std_logic;
CLKOUT7 : out std_logic;
CLKOUT8 : out std_logic;
CLKOUT9 : out std_logic;
CLKOUT10 : out std_logic;
CLKOUT11 : out std_logic;
CLKOUT12 : out std_logic;
CLKOUT13 : out std_logic;
CLKOUT14 : out std_logic;
CLKOUT15 : out std_logic;
CLKFBIN : in std_logic;
CLKFBOUT : out std_logic;
PSCLK : in std_logic;
PSEN : in std_logic;
PSINCDEC : in std_logic;
PSDONE : out std_logic;
RST : in std_logic;
LOCKED : out std_logic
);
attribute x_core_info : STRING;
attribute x_core_info of system_clock_generator_0_wrapper : entity is "clock_generator_v4_03_a";
end system_clock_generator_0_wrapper;
architecture STRUCTURE of system_clock_generator_0_wrapper is
component clock_generator is
generic (
C_FAMILY : STRING;
C_DEVICE : STRING;
C_PACKAGE : STRING;
C_SPEEDGRADE : STRING
);
port (
CLKIN : in std_logic;
CLKOUT0 : out std_logic;
CLKOUT1 : out std_logic;
CLKOUT2 : out std_logic;
CLKOUT3 : out std_logic;
CLKOUT4 : out std_logic;
CLKOUT5 : out std_logic;
CLKOUT6 : out std_logic;
CLKOUT7 : out std_logic;
CLKOUT8 : out std_logic;
CLKOUT9 : out std_logic;
CLKOUT10 : out std_logic;
CLKOUT11 : out std_logic;
CLKOUT12 : out std_logic;
CLKOUT13 : out std_logic;
CLKOUT14 : out std_logic;
CLKOUT15 : out std_logic;
CLKFBIN : in std_logic;
CLKFBOUT : out std_logic;
PSCLK : in std_logic;
PSEN : in std_logic;
PSINCDEC : in std_logic;
PSDONE : out std_logic;
RST : in std_logic;
LOCKED : out std_logic
);
end component;
begin
clock_generator_0 : clock_generator
generic map (
C_FAMILY => "virtex5",
C_DEVICE => "5vlx50t",
C_PACKAGE => "ff1136",
C_SPEEDGRADE => "-2"
)
port map (
CLKIN => CLKIN,
CLKOUT0 => CLKOUT0,
CLKOUT1 => CLKOUT1,
CLKOUT2 => CLKOUT2,
CLKOUT3 => CLKOUT3,
CLKOUT4 => CLKOUT4,
CLKOUT5 => CLKOUT5,
CLKOUT6 => CLKOUT6,
CLKOUT7 => CLKOUT7,
CLKOUT8 => CLKOUT8,
CLKOUT9 => CLKOUT9,
CLKOUT10 => CLKOUT10,
CLKOUT11 => CLKOUT11,
CLKOUT12 => CLKOUT12,
CLKOUT13 => CLKOUT13,
CLKOUT14 => CLKOUT14,
CLKOUT15 => CLKOUT15,
CLKFBIN => CLKFBIN,
CLKFBOUT => CLKFBOUT,
PSCLK => PSCLK,
PSEN => PSEN,
PSINCDEC => PSINCDEC,
PSDONE => PSDONE,
RST => RST,
LOCKED => LOCKED
);
end architecture STRUCTURE;
|
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;
entity ROM_controller_SPI is
Port (clk_25, rst, read: in STD_LOGIC;
si_i: out STD_LOGIC;
cs_n: out STD_LOGIC;
-- so, acc, hold: in STD_LOGIC;
wp: out std_logic;
si_t: out std_logic;
wp_t: out std_logic;
address_in: in STD_LOGIC_VECTOR(23 downto 0);
qd: in STD_LOGIC_VECTOR(3 downto 0);
data_out: out STD_LOGIC_VECTOR(31 downto 0);
--pragma synthesis_off
counter: out integer;
--pragma synthesis_on
-- command_int, address_int, reg_one_int, reg_two_int: inout integer;
done: out STD_LOGIC
);
end ROM_controller_SPI;
architecture Behavioral of ROM_controller_SPI is
signal CFGCLK, CFGMCLK, EOS, PREQ: std_logic;
signal SCLK: std_logic := '0';
signal read_command: std_logic_vector(8 downto 0) := (0=>'0', 1=>'0', 2=>'0', 3=>'0', 4=>'0',5=>'0',6=>'1',7=>'1', 8 => '0');
signal address_signal: std_logic_vector(23 downto 0) := (others => '0');
signal command_ctr, address_ctr, data_1_ctr, data_2_ctr, dummy_ctr: natural := 0;
signal done_1_flag, done_2_flag: std_logic := '1';
signal data_register_1, data_register_2 : std_logic_vector(31 downto 0) := (others => '0');
type spi_states is (idle, command, address, data_out_one_low, data_out_one_high, data_out_two, dummy, deasrt);
signal curr_state, next_state : spi_states := idle;
signal sckl_o,locked : std_logic;
signal s_t_si: std_logic;
signal s_clok_wat: std_logic := '0';
signal data_counter: natural := 0;
signal stop: std_logic := '0';
signal s_done: std_logic := '0';
signal retarded_counter : integer := 0;
signal one_clock_cycle: integer := 0;
signal s_read: std_logic;
signal counter_s : std_logic;
signal counter_o : std_logic_vector(30 downto 0) := (others => '0');
begin
retarded_ctr_adder: process(clk_25, rst) begin
if(rst = '1') then
retarded_counter <= 0;
elsif(rising_edge(clk_25)) then
if(read = '1' and retarded_counter < 55) then
retarded_counter <= retarded_counter + 1;
elsif(retarded_counter > 100) then
retarded_counter <= 0;
end if;
end if;
end process;
read_proc: process(clk_25, rst, read) begin
if(rst = '1') then
one_clock_cycle <= 0;
s_read <= '0';
elsif(rising_edge(clk_25) and read = '1') then
one_clock_cycle <= one_clock_cycle + 1;
if(one_clock_cycle = 0) then
s_read <= '1';
elsif(one_clock_cycle = 1) then
s_read <= '0';
end if;
end if;
end process;
retarded_ctr_fsm: process(clk_25, rst, s_read) begin
if(rst = '1') then
cs_n <= '1';
SCLK <= '0';
si_t <= '0';
wp_t <= '1';
-- data_register_1 <= (others => '0');
elsif(rising_edge(clk_25)) then
if(retarded_counter > 0) then
sclk <= sclk xor '1';
end if;
case retarded_counter is
when 0 =>
si_t <= '0';
s_done <= '0';
si_i <= '0';
wp <= '0';
cs_n <= '1';
if(s_read = '1') then
cs_n <= '0';
end if;
wp_t <= '1';
when 1 => -- Wait for cs_n to propagate (?)
cs_n <= '0';
when 2 =>
si_i <= '0';
when 3 =>
si_i <= '0';
when 4 =>
si_i <= '0';
when 5 =>
si_i <= '0';
when 6 =>
si_i <= '0';
when 7 =>
si_i <= '0';
when 8 =>
si_i <= '1';
when 9 =>
si_i <= '1';
when 10 =>
si_i <= '0';
-- data_register_1(0) <= SO;
when 11 =>
si_i <= '0';
-- data_register_1(1) <= SO;
when 12 =>
si_i <= '0';
-- data_register_1(3) <= SO;
when 13 =>
si_i <= '0';
-- data_register_1(4) <= SO;
when 14 =>
si_i <= '0';
-- data_register_1(5) <= SO;
when 15 =>
si_i <= '0';
-- data_register_1(6) <= SO;
when 16 =>
si_i <= '0';
-- data_register_1(7) <= SO;
when 29 =>
si_i <= address_in(5);
when 30 =>
si_i <= address_in(4);
when 31 =>
si_i <= address_in(3);
when 32 =>
si_i <= address_in(2);
when 33 =>
si_i <= address_in(1);
when 34 =>
si_i <= address_in(0);
when 35 =>
data_register_1(31) <= qd(1);
when 36 =>
data_register_1(30) <= qd(1);
when 37 =>
data_register_1(29) <= qd(1);
when 38 =>
data_register_1(28) <= qd(1);
when 39 =>
data_register_1(27) <= qd(1);
when 40 =>
data_register_1(26) <= qd(1);
when 41 =>
data_register_1(25) <= qd(1);
when 42 =>
data_register_1(24) <= qd(1);
when 43 =>
data_register_1(23) <= qd(1);
when 44 =>
data_register_1(22) <= qd(1);
when 45 =>
data_register_1(21) <= qd(1);
when 46 =>
data_register_1(20) <= qd(1);
when 47 =>
data_register_1(19) <= qd(1);
when 48 =>
data_register_1(18) <= qd(1);
when 49 =>
data_register_1(17) <= qd(1);
when 50 =>
data_register_1(16) <= qd(1);
when 51 =>
data_register_1(16) <= qd(1);
when 52 =>
data_register_1(15) <= qd(1);
when 53 =>
data_register_1(14) <= qd(1);
when 54 =>
data_register_1(13) <= qd(1);
when 55 =>
data_register_1(12) <= qd(1);
when 56 =>
data_register_1(11) <= qd(1);
when 57 =>
data_register_1(10) <= qd(1);
when 58 =>
data_register_1(9) <= qd(1);
when 59 =>
data_register_1(8) <= qd(1);
when 60 =>
data_register_1(7) <= qd(1);
when 61 =>
data_register_1(6) <= qd(1);
when 62 =>
data_register_1(5) <= qd(1);
when 63 =>
data_register_1(4) <= qd(1);
when 64 =>
data_register_1(3) <= qd(1);
when 65 =>
data_register_1(2) <= qd(1);
when 66 =>
data_register_1(1) <= qd(1);
when 67 =>
data_register_1(0) <= qd(1);
when 68 =>
cs_n <= '1';
done <= '1';
when others =>
end case;
end if;
end process;
-- QUAD command if switch 2 is off, SINGLE READ if switch 2 is on
read_command <= (0=>'0', 1=>'0', 2=>'0', 3=>'0', 4=>'0',5=>'0',6=>'1',7=>'1', 8 => '0');
--done <= s_done;
address_signal <= address_in;
data_out <= data_register_1;
--pragma synthesis_off
counter <= retarded_counter;
--pragma synthesis_on
end Behavioral;
|
---------------------------------------------------------------------
-- TITLE: Controller / Opcode Decoder
-- AUTHOR: Steve Rhoads ([email protected])
-- DATE CREATED: 2/8/01
-- FILENAME: control.vhd
-- PROJECT: Plasma CPU core
-- COPYRIGHT: Software placed into the public domain by the author.
-- Software 'as is' without warranty. Author liable for nothing.
-- NOTE: MIPS(tm) is a registered trademark of MIPS Technologies.
-- MIPS Technologies does not endorse and is not associated with
-- this project.
-- DESCRIPTION:
-- Controls the CPU by decoding the opcode and generating control
-- signals to the rest of the CPU.
-- This entity decodes the MIPS(tm) opcode into a
-- Very-Long-Word-Instruction.
-- The 32-bit opcode is converted to a
-- 6+6+6+16+4+2+4+3+2+2+3+2+4 = 60 bit VLWI opcode.
-- Based on information found in:
-- "MIPS RISC Architecture" by Gerry Kane and Joe Heinrich
-- and "The Designer's Guide to VHDL" by Peter J. Ashenden
---------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use work.mlite_pack.all;
entity control is
port(opcode : in std_logic_vector(31 downto 0);
intr_signal : in std_logic;
rs_index : out std_logic_vector(5 downto 0);
rt_index : out std_logic_vector(5 downto 0);
rd_index : out std_logic_vector(5 downto 0);
imm_out : out std_logic_vector(15 downto 0);
alu_func : out alu_function_type;
shift_func : out shift_function_type;
mult_func : out mult_function_type;
branch_func : out branch_function_type;
a_source_out : out a_source_type;
b_source_out : out b_source_type;
c_source_out : out c_source_type;
pc_source_out: out pc_source_type;
mem_source_out:out mem_source_type;
exception_out: out std_logic);
end; --entity control
architecture logic of control is
begin
control_proc: process(opcode, intr_signal)
variable op, func : std_logic_vector(5 downto 0);
variable rs, rt, rd : std_logic_vector(5 downto 0);
variable rtx : std_logic_vector(4 downto 0);
variable imm : std_logic_vector(15 downto 0);
variable alu_function : alu_function_type;
variable shift_function : shift_function_type;
variable mult_function : mult_function_type;
variable a_source : a_source_type;
variable b_source : b_source_type;
variable c_source : c_source_type;
variable pc_source : pc_source_type;
variable branch_function: branch_function_type;
variable mem_source : mem_source_type;
variable is_syscall : std_logic;
begin
alu_function := ALU_NOTHING;
shift_function := SHIFT_NOTHING;
mult_function := MULT_NOTHING;
a_source := A_FROM_REG_SOURCE;
b_source := B_FROM_REG_TARGET;
c_source := C_FROM_NULL;
pc_source := FROM_INC4;
branch_function := BRANCH_EQ;
mem_source := MEM_FETCH;
op := opcode(31 downto 26);
rs := '0' & opcode(25 downto 21);
rt := '0' & opcode(20 downto 16);
rtx := opcode(20 downto 16);
rd := '0' & opcode(15 downto 11);
func := opcode(5 downto 0);
imm := opcode(15 downto 0);
is_syscall := '0';
case op is
when "000000" => --SPECIAL
case func is
when "000000" => --SLL r[rd]=r[rt]<<re;
a_source := A_FROM_IMM10_6;
c_source := C_FROM_SHIFT;
shift_function := SHIFT_LEFT_UNSIGNED;
when "000010" => --SRL r[rd]=u[rt]>>re;
a_source := A_FROM_IMM10_6;
c_source := C_FROM_shift;
shift_function := SHIFT_RIGHT_UNSIGNED;
when "000011" => --SRA r[rd]=r[rt]>>re;
a_source := A_FROM_IMM10_6;
c_source := C_FROM_SHIFT;
shift_function := SHIFT_RIGHT_SIGNED;
when "000100" => --SLLV r[rd]=r[rt]<<r[rs];
c_source := C_FROM_SHIFT;
shift_function := SHIFT_LEFT_UNSIGNED;
when "000110" => --SRLV r[rd]=u[rt]>>r[rs];
c_source := C_FROM_SHIFT;
shift_function := SHIFT_RIGHT_UNSIGNED;
when "000111" => --SRAV r[rd]=r[rt]>>r[rs];
c_source := C_FROM_SHIFT;
shift_function := SHIFT_RIGHT_SIGNED;
when "001000" => --JR s->pc_next=r[rs];
pc_source := FROM_BRANCH;
alu_function := ALU_ADD;
branch_function := BRANCH_YES;
when "001001" => --JALR r[rd]=s->pc_next; s->pc_next=r[rs];
c_source := C_FROM_PC_PLUS4;
pc_source := FROM_BRANCH;
alu_function := ALU_ADD;
branch_function := BRANCH_YES;
--when "001010" => --MOVZ if(!r[rt]) r[rd]=r[rs]; /*IV*/
--when "001011" => --MOVN if(r[rt]) r[rd]=r[rs]; /*IV*/
when "001100" => --SYSCALL
is_syscall := '1';
when "001101" => --BREAK s->wakeup=1;
is_syscall := '1';
--when "001111" => --SYNC s->wakeup=1;
when "010000" => --MFHI r[rd]=s->hi;
c_source := C_FROM_MULT;
mult_function := MULT_READ_HI;
when "010001" => --MTHI s->hi=r[rs];
mult_function := MULT_WRITE_HI;
when "010010" => --MFLO r[rd]=s->lo;
c_source := C_FROM_MULT;
mult_function := MULT_READ_LO;
when "010011" => --MTLO s->lo=r[rs];
mult_function := MULT_WRITE_LO;
when "011000" => --MULT s->lo=r[rs]*r[rt]; s->hi=0;
mult_function := MULT_SIGNED_MULT;
when "011001" => --MULTU s->lo=r[rs]*r[rt]; s->hi=0;
mult_function := MULT_MULT;
when "011010" => --DIV s->lo=r[rs]/r[rt]; s->hi=r[rs]%r[rt];
mult_function := MULT_SIGNED_DIVIDE;
when "011011" => --DIVU s->lo=r[rs]/r[rt]; s->hi=r[rs]%r[rt];
mult_function := MULT_DIVIDE;
when "100000" => --ADD r[rd]=r[rs]+r[rt];
c_source := C_FROM_ALU;
alu_function := ALU_ADD;
when "100001" => --ADDU r[rd]=r[rs]+r[rt];
c_source := C_FROM_ALU;
alu_function := ALU_ADD;
when "100010" => --SUB r[rd]=r[rs]-r[rt];
c_source := C_FROM_ALU;
alu_function := ALU_SUBTRACT;
when "100011" => --SUBU r[rd]=r[rs]-r[rt];
c_source := C_FROM_ALU;
alu_function := ALU_SUBTRACT;
when "100100" => --AND r[rd]=r[rs]&r[rt];
c_source := C_FROM_ALU;
alu_function := ALU_AND;
when "100101" => --OR r[rd]=r[rs]|r[rt];
c_source := C_FROM_ALU;
alu_function := ALU_OR;
when "100110" => --XOR r[rd]=r[rs]^r[rt];
c_source := C_FROM_ALU;
alu_function := ALU_XOR;
when "100111" => --NOR r[rd]=~(r[rs]|r[rt]);
c_source := C_FROM_ALU;
alu_function := ALU_NOR;
when "101010" => --SLT r[rd]=r[rs]<r[rt];
c_source := C_FROM_ALU;
alu_function := ALU_LESS_THAN_SIGNED;
when "101011" => --SLTU r[rd]=u[rs]<u[rt];
c_source := C_FROM_ALU;
alu_function := ALU_LESS_THAN;
when "101101" => --DADDU r[rd]=r[rs]+u[rt];
c_source := C_FROM_ALU;
alu_function := ALU_ADD;
--when "110001" => --TGEU
--when "110010" => --TLT
--when "110011" => --TLTU
--when "110100" => --TEQ
--when "110110" => --TNE
when others =>
end case;
when "000001" => --REGIMM
rt := "000000";
rd := "011111";
a_source := A_FROM_PC;
b_source := B_FROM_IMMX4;
alu_function := ALU_ADD;
pc_source := FROM_BRANCH;
branch_function := BRANCH_GTZ;
--if(test) pc=pc+imm*4
case rtx is
when "10000" => --BLTZAL r[31]=s->pc_next; branch=r[rs]<0;
c_source := C_FROM_PC_PLUS4;
branch_function := BRANCH_LTZ;
when "00000" => --BLTZ branch=r[rs]<0;
branch_function := BRANCH_LTZ;
when "10001" => --BGEZAL r[31]=s->pc_next; branch=r[rs]>=0;
c_source := C_FROM_PC_PLUS4;
branch_function := BRANCH_GEZ;
when "00001" => --BGEZ branch=r[rs]>=0;
branch_function := BRANCH_GEZ;
--when "10010" => --BLTZALL r[31]=s->pc_next; lbranch=r[rs]<0;
--when "00010" => --BLTZL lbranch=r[rs]<0;
--when "10011" => --BGEZALL r[31]=s->pc_next; lbranch=r[rs]>=0;
--when "00011" => --BGEZL lbranch=r[rs]>=0;
when others =>
end case;
when "000011" => --JAL r[31]=s->pc_next; s->pc_next=(s->pc&0xf0000000)|target;
c_source := C_FROM_PC_PLUS4;
rd := "011111";
pc_source := FROM_OPCODE25_0;
when "000010" => --J s->pc_next=(s->pc&0xf0000000)|target;
pc_source := FROM_OPCODE25_0;
when "000100" => --BEQ branch=r[rs]==r[rt];
a_source := A_FROM_PC;
b_source := B_FROM_IMMX4;
alu_function := ALU_ADD;
pc_source := FROM_BRANCH;
branch_function := BRANCH_EQ;
when "000101" => --BNE branch=r[rs]!=r[rt];
a_source := A_FROM_PC;
b_source := B_FROM_IMMX4;
alu_function := ALU_ADD;
pc_source := FROM_BRANCH;
branch_function := BRANCH_NE;
when "000110" => --BLEZ branch=r[rs]<=0;
a_source := A_FROM_PC;
b_source := b_FROM_IMMX4;
alu_function := ALU_ADD;
pc_source := FROM_BRANCH;
branch_function := BRANCH_LEZ;
when "000111" => --BGTZ branch=r[rs]>0;
a_source := A_FROM_PC;
b_source := B_FROM_IMMX4;
alu_function := ALU_ADD;
pc_source := FROM_BRANCH;
branch_function := BRANCH_GTZ;
when "001000" => --ADDI r[rt]=r[rs]+(short)imm;
b_source := B_FROM_SIGNED_IMM;
c_source := C_FROM_ALU;
rd := rt;
alu_function := ALU_ADD;
when "001001" => --ADDIU u[rt]=u[rs]+(short)imm;
b_source := B_FROM_SIGNED_IMM;
c_source := C_FROM_ALU;
rd := rt;
alu_function := ALU_ADD;
when "001010" => --SLTI r[rt]=r[rs]<(short)imm;
b_source := B_FROM_SIGNED_IMM;
c_source := C_FROM_ALU;
rd := rt;
alu_function := ALU_LESS_THAN_SIGNED;
when "001011" => --SLTIU u[rt]=u[rs]<(unsigned long)(short)imm;
b_source := B_FROM_SIGNED_IMM;
c_source := C_FROM_ALU;
rd := rt;
alu_function := ALU_LESS_THAN;
when "001100" => --ANDI r[rt]=r[rs]&imm;
b_source := B_FROM_IMM;
c_source := C_FROM_ALU;
rd := rt;
alu_function := ALU_AND;
when "001101" => --ORI r[rt]=r[rs]|imm;
b_source := B_FROM_IMM;
c_source := C_FROM_ALU;
rd := rt;
alu_function := ALU_OR;
when "001110" => --XORI r[rt]=r[rs]^imm;
b_source := B_FROM_IMM;
c_source := C_FROM_ALU;
rd := rt;
alu_function := ALU_XOR;
when "001111" => --LUI r[rt]=(imm<<16);
c_source := C_FROM_IMM_SHIFT16;
rd := rt;
when "010000" => --COP0
alu_function := ALU_OR;
c_source := C_FROM_ALU;
if opcode(23) = '0' then --move from CP0
rs := '1' & opcode(15 downto 11);
rt := "000000";
rd := '0' & opcode(20 downto 16);
else --move to CP0
rs := "000000";
rd(5) := '1';
pc_source := FROM_BRANCH; --delay possible interrupt
branch_function := BRANCH_NO;
end if;
--when "010001" => --COP1
--when "010010" => --COP2
--when "010011" => --COP3
--when "010100" => --BEQL lbranch=r[rs]==r[rt];
--when "010101" => --BNEL lbranch=r[rs]!=r[rt];
--when "010110" => --BLEZL lbranch=r[rs]<=0;
--when "010111" => --BGTZL lbranch=r[rs]>0;
when "100000" => --LB r[rt]=*(signed char*)ptr;
a_source := A_FROM_REG_SOURCE;
b_source := B_FROM_SIGNED_IMM;
alu_function := ALU_ADD;
rd := rt;
c_source := C_FROM_MEMORY;
mem_source := MEM_READ8S; --address=(short)imm+r[rs];
when "100001" => --LH r[rt]=*(signed short*)ptr;
a_source := A_FROM_REG_SOURCE;
b_source := B_FROM_SIGNED_IMM;
alu_function := ALU_ADD;
rd := rt;
c_source := C_FROM_MEMORY;
mem_source := MEM_READ16S; --address=(short)imm+r[rs];
when "100010" => --LWL //Not Implemented
a_source := A_FROM_REG_SOURCE;
b_source := B_FROM_SIGNED_IMM;
alu_function := ALU_ADD;
rd := rt;
c_source := C_FROM_MEMORY;
mem_source := MEM_READ32;
when "100011" => --LW r[rt]=*(long*)ptr;
a_source := A_FROM_REG_SOURCE;
b_source := B_FROM_SIGNED_IMM;
alu_function := ALU_ADD;
rd := rt;
c_source := C_FROM_MEMORY;
mem_source := MEM_READ32;
when "100100" => --LBU r[rt]=*(unsigned char*)ptr;
a_source := A_FROM_REG_SOURCE;
b_source := B_FROM_SIGNED_IMM;
alu_function := ALU_ADD;
rd := rt;
c_source := C_FROM_MEMORY;
mem_source := MEM_READ8; --address=(short)imm+r[rs];
when "100101" => --LHU r[rt]=*(unsigned short*)ptr;
a_source := A_FROM_REG_SOURCE;
b_source := B_FROM_SIGNED_IMM;
alu_function := ALU_ADD;
rd := rt;
c_source := C_FROM_MEMORY;
mem_source := MEM_READ16; --address=(short)imm+r[rs];
--when "100110" => --LWR //Not Implemented
when "101000" => --SB *(char*)ptr=(char)r[rt];
a_source := A_FROM_REG_SOURCE;
b_source := B_FROM_SIGNED_IMM;
alu_function := ALU_ADD;
mem_source := MEM_WRITE8; --address=(short)imm+r[rs];
when "101001" => --SH *(short*)ptr=(short)r[rt];
a_source := A_FROM_REG_SOURCE;
b_source := B_FROM_SIGNED_IMM;
alu_function := ALU_ADD;
mem_source := MEM_WRITE16;
when "101010" => --SWL //Not Implemented
a_source := A_FROM_REG_SOURCE;
b_source := B_FROM_SIGNED_IMM;
alu_function := ALU_ADD;
mem_source := MEM_WRITE32; --address=(short)imm+r[rs];
when "101011" => --SW *(long*)ptr=r[rt];
a_source := A_FROM_REG_SOURCE;
b_source := B_FROM_SIGNED_IMM;
alu_function := ALU_ADD;
mem_source := MEM_WRITE32; --address=(short)imm+r[rs];
--when "101110" => --SWR //Not Implemented
--when "101111" => --CACHE
--when "110000" => --LL r[rt]=*(long*)ptr;
--when "110001" => --LWC1
--when "110010" => --LWC2
--when "110011" => --LWC3
--when "110101" => --LDC1
--when "110110" => --LDC2
--when "110111" => --LDC3
--when "111000" => --SC *(long*)ptr=r[rt]; r[rt]=1;
--when "111001" => --SWC1
--when "111010" => --SWC2
--when "111011" => --SWC3
--when "111101" => --SDC1
--when "111110" => --SDC2
--when "111111" => --SDC3
when others =>
end case;
if c_source = C_FROM_NULL then
rd := "000000";
end if;
if intr_signal = '1' or is_syscall = '1' then
rs := "111111"; --interrupt vector
rt := "000000";
rd := "101110"; --save PC in EPC
alu_function := ALU_OR;
shift_function := SHIFT_NOTHING;
mult_function := MULT_NOTHING;
branch_function := BRANCH_YES;
a_source := A_FROM_REG_SOURCE;
b_source := B_FROM_REG_TARGET;
c_source := C_FROM_PC;
pc_source := FROM_LBRANCH;
mem_source := MEM_FETCH;
exception_out <= '1';
else
exception_out <= '0';
end if;
rs_index <= rs;
rt_index <= rt;
rd_index <= rd;
imm_out <= imm;
alu_func <= alu_function;
shift_func <= shift_function;
mult_func <= mult_function;
branch_func <= branch_function;
a_source_out <= a_source;
b_source_out <= b_source;
c_source_out <= c_source;
pc_source_out <= pc_source;
mem_source_out <= mem_source;
end process;
end; --logic
|
--------------------------------------------------------------------------------
--
-- BLK MEM GEN v8_0 Core - Address Generator
--
--------------------------------------------------------------------------------
--
-- (c) Copyright 2006_3010 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--------------------------------------------------------------------------------
--
-- Filename: addr_gen.vhd
--
-- Description:
-- Address Generator
--
--------------------------------------------------------------------------------
-- Author: IP Solutions Division
--
-- History: Sep 12, 2011 - First Release
--------------------------------------------------------------------------------
--
--------------------------------------------------------------------------------
-- Library Declarations
--------------------------------------------------------------------------------
LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.STD_LOGIC_ARITH.ALL;
USE IEEE.STD_LOGIC_UNSIGNED.ALL;
--LIBRARY work;
--USE work.ALL;
ENTITY ADDR_GEN IS
GENERIC ( C_MAX_DEPTH : INTEGER := 1024 ;
RST_VALUE : STD_LOGIC_VECTOR(31 DOWNTO 0) := (OTHERS=> '0');
RST_INC : INTEGER := 0);
PORT (
CLK : IN STD_LOGIC;
RST : IN STD_LOGIC;
EN : IN STD_LOGIC;
LOAD :IN STD_LOGIC;
LOAD_VALUE : IN STD_LOGIC_VECTOR (31 DOWNTO 0) := (OTHERS => '0');
ADDR_OUT : OUT STD_LOGIC_VECTOR (31 DOWNTO 0) --OUTPUT VECTOR
);
END ADDR_GEN;
ARCHITECTURE BEHAVIORAL OF ADDR_GEN IS
SIGNAL ADDR_TEMP : STD_LOGIC_VECTOR(31 DOWNTO 0) := (OTHERS =>'0');
BEGIN
ADDR_OUT <= ADDR_TEMP;
PROCESS(CLK)
BEGIN
IF(RISING_EDGE(CLK)) THEN
IF(RST='1') THEN
ADDR_TEMP<= RST_VALUE + conv_std_logic_vector(RST_INC,32 );
ELSE
IF(EN='1') THEN
IF(LOAD='1') THEN
ADDR_TEMP <=LOAD_VALUE;
ELSE
IF(ADDR_TEMP = C_MAX_DEPTH-1) THEN
ADDR_TEMP<= RST_VALUE + conv_std_logic_vector(RST_INC,32 );
ELSE
ADDR_TEMP <= ADDR_TEMP + '1';
END IF;
END IF;
END IF;
END IF;
END IF;
END PROCESS;
END ARCHITECTURE;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc939.vhd,v 1.2 2001-10-26 16:30:28 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c10s05b00x00p01n01i00939ent IS
port (PT:BOOLEAN) ;
type BITT is ('0','1');
type DBIT is ('0','1','x'); -- '0' and '1' are overloaded
attribute AT1 : BITT;
attribute AT1 : DBIT; -- Failure_here
-- ERROR : Attribute AT1 is overloaded.
attribute AT1 : INTEGER; -- Failure_here
-- ERROR : Attribute AT1 is overloaded.
END c10s05b00x00p01n01i00939ent;
ARCHITECTURE c10s05b00x00p01n01i00939arch OF c10s05b00x00p01n01i00939ent IS
BEGIN
TESTING: PROCESS
BEGIN
assert FALSE
report "***FAILED TEST: c10s05b00x00p01n01i00939 - Attributes cannot be overloaded."
severity ERROR;
wait;
END PROCESS TESTING;
END c10s05b00x00p01n01i00939arch;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc939.vhd,v 1.2 2001-10-26 16:30:28 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c10s05b00x00p01n01i00939ent IS
port (PT:BOOLEAN) ;
type BITT is ('0','1');
type DBIT is ('0','1','x'); -- '0' and '1' are overloaded
attribute AT1 : BITT;
attribute AT1 : DBIT; -- Failure_here
-- ERROR : Attribute AT1 is overloaded.
attribute AT1 : INTEGER; -- Failure_here
-- ERROR : Attribute AT1 is overloaded.
END c10s05b00x00p01n01i00939ent;
ARCHITECTURE c10s05b00x00p01n01i00939arch OF c10s05b00x00p01n01i00939ent IS
BEGIN
TESTING: PROCESS
BEGIN
assert FALSE
report "***FAILED TEST: c10s05b00x00p01n01i00939 - Attributes cannot be overloaded."
severity ERROR;
wait;
END PROCESS TESTING;
END c10s05b00x00p01n01i00939arch;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc939.vhd,v 1.2 2001-10-26 16:30:28 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c10s05b00x00p01n01i00939ent IS
port (PT:BOOLEAN) ;
type BITT is ('0','1');
type DBIT is ('0','1','x'); -- '0' and '1' are overloaded
attribute AT1 : BITT;
attribute AT1 : DBIT; -- Failure_here
-- ERROR : Attribute AT1 is overloaded.
attribute AT1 : INTEGER; -- Failure_here
-- ERROR : Attribute AT1 is overloaded.
END c10s05b00x00p01n01i00939ent;
ARCHITECTURE c10s05b00x00p01n01i00939arch OF c10s05b00x00p01n01i00939ent IS
BEGIN
TESTING: PROCESS
BEGIN
assert FALSE
report "***FAILED TEST: c10s05b00x00p01n01i00939 - Attributes cannot be overloaded."
severity ERROR;
wait;
END PROCESS TESTING;
END c10s05b00x00p01n01i00939arch;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc749.vhd,v 1.2 2001-10-26 16:29:59 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY tc749 IS
generic(
zero : integer := 0;
one : integer := 1;
two : integer := 2;
three: integer := 3;
four : integer := 4;
five : integer := 5;
six : integer := 6;
seven: integer := 7;
eight: integer := 8;
nine : integer := 9;
fifteen:integer:= 15;
C1 : boolean := true;
C2 : bit := '1';
C3 : character := 's';
C4 : severity_level:= note;
C5 : integer := 3;
C6 : real := 3.0;
C7 : time := 3 ns;
C8 : natural := 1;
C9 : positive := 1;
C10 : string := "shishir";
C11 : bit_vector := B"0011"
);
END tc749;
ARCHITECTURE arch OF tc749 IS
subtype hi_to_low_range is integer range zero to seven;
type boolean_vector is array (natural range <>) of boolean;
type severity_level_vector is array (natural range <>) of severity_level;
type integer_vector is array (natural range <>) of integer;
type real_vector is array (natural range <>) of real;
type time_vector is array (natural range <>) of time;
type natural_vector is array (natural range <>) of natural;
type positive_vector is array (natural range <>) of positive;
subtype boolean_vector_st is boolean_vector(zero to fifteen);
subtype severity_level_vector_st is severity_level_vector(zero to fifteen);
subtype integer_vector_st is integer_vector(zero to fifteen);
subtype real_vector_st is real_vector(zero to fifteen);
subtype time_vector_st is time_vector(zero to fifteen);
subtype natural_vector_st is natural_vector(zero to fifteen);
subtype positive_vector_st is positive_vector(zero to fifteen);
type boolean_cons_vector is array (fifteen downto zero) of boolean;
type severity_level_cons_vector is array (fifteen downto zero) of severity_level;
type integer_cons_vector is array (fifteen downto zero) of integer;
type real_cons_vector is array (fifteen downto zero) of real;
type time_cons_vector is array (fifteen downto zero) of time;
type natural_cons_vector is array (fifteen downto zero) of natural;
type positive_cons_vector is array (fifteen downto zero) of positive;
type boolean_cons_vectorofvector is array (zero to fifteen) of boolean_cons_vector;
type severity_level_cons_vectorofvector is array (zero to fifteen) of severity_level_cons_vector;
type integer_cons_vectorofvector is array (zero to fifteen) of integer_cons_vector
;
type real_cons_vectorofvector is array (zero to fifteen) of real_cons_vector;
type time_cons_vectorofvector is array (zero to fifteen) of time_cons_vector;
type natural_cons_vectorofvector is array (zero to fifteen) of natural_cons_vector;
type positive_cons_vectorofvector is array (zero to fifteen) of positive_cons_vector;
type record_std_package is record
a:boolean;
b:bit;
c:character;
d:severity_level;
e:integer;
f:real;
g:time;
h:natural;
i:positive;
j:string(one to seven);
k:bit_vector(zero to three);
end record;
type record_array_st is record
a:boolean_vector_st;
b:severity_level_vector_st;
c:integer_vector_st;
d:real_vector_st;
e:time_vector_st;
f:natural_vector_st;
g:positive_vector_st;
end record;
type record_cons_array is record
a:boolean_cons_vector;
b:severity_level_cons_vector;
c:integer_cons_vector;
d:real_cons_vector;
e:time_cons_vector;
f:natural_cons_vector;
g:positive_cons_vector;
end record;
type record_cons_arrayofarray is record
a:boolean_cons_vectorofvector;
b:severity_level_cons_vectorofvector;
c:integer_cons_vectorofvector;
d:real_cons_vectorofvector;
e:time_cons_vectorofvector;
f:natural_cons_vectorofvector;
g:positive_cons_vectorofvector;
end record;
type record_array_new is record
a:boolean_vector(zero to fifteen);
b:severity_level_vector(zero to fifteen);
c:integer_vector(zero to fifteen);
d:real_vector(zero to fifteen);
e:time_vector(zero to fifteen);
f:natural_vector(zero to fifteen);
g:positive_vector(zero to fifteen);
end record;
type record_of_records is record
a: record_std_package;
c: record_cons_array;
g: record_cons_arrayofarray;
i: record_array_st;
j: record_array_new;
end record;
subtype boolean_vector_range is boolean_vector(hi_to_low_range);
subtype severity_level_vector_range is severity_level_vector(hi_to_low_range);
subtype integer_vector_range is integer_vector(hi_to_low_range);
subtype real_vector_range is real_vector(hi_to_low_range);
subtype time_vector_range is time_vector(hi_to_low_range);
subtype natural_vector_range is natural_vector(hi_to_low_range);
subtype positive_vector_range is positive_vector(hi_to_low_range);
type array_rec_std is array (integer range <>) of record_std_package;
type array_rec_cons is array (integer range <>) of record_cons_array;
constant C12 : boolean_vector := (C1,false);
constant C13 : severity_level_vector := (C4,error);
constant C14 : integer_vector := (one,two,three,four);
constant C15 : real_vector := (1.0,2.0,C6,4.0);
constant C16 : time_vector := (1 ns, 2 ns,C7, 4 ns);
constant C17 : natural_vector := (one,2,3,4);
constant C18 : positive_vector := (one,2,3,4);
constant C19 : boolean_cons_vector := (others => C1);
constant C20 : severity_level_cons_vector := (others => C4);
constant C21 : integer_cons_vector := (others => C5);
constant C22 : real_cons_vector := (others => C6);
constant C23 : time_cons_vector := (others => C7);
constant C24 : natural_cons_vector := (others => C8);
constant C25 : positive_cons_vector := (others => C9);
constant C26 : boolean_cons_vectorofvector := (others => (others => C1));
constant C27 : severity_level_cons_vectorofvector := (others => (others => C4));
constant C28 : integer_cons_vectorofvector := (others => (others => C5));
constant C29 : real_cons_vectorofvector := (others => (others => C6));
constant C30 : time_cons_vectorofvector := (others => (others => C7));
constant C31 : natural_cons_vectorofvector := (others => (others => C8));
constant C32 : positive_cons_vectorofvector := (others => (others => C9));
constant C50 : record_std_package := (C1,C2,C3,C4,C5,C6,C7,C8,C9,C10,C11);
constant C51 : record_cons_array := (C19,C20,C21,C22,C23,C24,C25);
constant C53 : record_cons_arrayofarray := (C26,C27,C28,C29,C30,C31,C32);
constant C70 : boolean_vector_st :=(others => C1);
constant C71 : severity_level_vector_st := (others => C4);
constant C72 : integer_vector_st:=(others => C5);
constant C73 : real_vector_st :=(others => C6);
constant C74 : time_vector_st :=(others => C7);
constant C75 : natural_vector_st:=(others => C8);
constant C76 : positive_vector_st:=(others => C9);
constant C77 : record_array_st := (C70,C71,C72,C73,C74,C75,C76);
constant C54a :record_array_st := (C70,C71,C72,C73,C74,C75,C76);
constant C54b: record_array_new := (C70,C71,C72,C73,C74,C75,C76);
constant C55 : record_of_records:= (C50,C51,C53,C77,C54b);
constant C86: array_rec_cons (0 to 7) :=(others => C51);
signal V1 : boolean_vector(zero to fifteen) ;
signal V2 : severity_level_vector(zero to fifteen);
signal V3 : integer_vector(zero to fifteen) ;
signal V4 : real_vector(zero to fifteen) ;
signal V5 : time_vector (zero to fifteen);
signal V6 : natural_vector(zero to fifteen);
signal V7 : positive_vector(zero to fifteen);
signal V8 : boolean_cons_vector;
signal V9 : severity_level_cons_vector ;
signal V10 : integer_cons_vector;
signal V11 : real_cons_vector;
signal V12 : time_cons_vector ;
signal V13 : natural_cons_vector ;
signal V14 : positive_cons_vector ;
signal V15 : boolean_cons_vectorofvector ;
signal V16 : severity_level_cons_vectorofvector;
signal V17 : integer_cons_vectorofvector;
signal V18 : real_cons_vectorofvector;
signal V19 : time_cons_vectorofvector;
signal V20 : natural_cons_vectorofvector;
signal V21 : positive_cons_vectorofvector;
signal V22 : record_std_package;
signal V23 : record_cons_array ;
signal V24 : record_cons_arrayofarray ;
signal V25 : boolean_vector_st ;
signal V26 : severity_level_vector_st ;
signal V27 : integer_vector_st ;
signal V28 : real_vector_st ;
signal V29 : time_vector_st ;
signal V30 : natural_vector_st ;
signal V31 : positive_vector_st ;
signal V32 : record_array_st ;
signal V33 : record_array_st ;
signal V34 : record_array_new ;
signal V35 : record_of_records ;
signal V49 : array_rec_cons(zero to seven) ;
BEGIN
V1 <= (zero to fifteen => C1);
V2 <= (zero to fifteen => C4);
V3 <= (zero to fifteen => C5);
V4 <= (zero to fifteen => C6);
V5 <= (zero to fifteen => C7);
V6 <= (zero to fifteen => C8);
V7 <= (zero to fifteen => C9);
V8 <= C19;
V9 <= C20;
V10 <= C21;
V11 <= C22;
V12 <= C23;
V13 <= C24;
V14 <= C25;
V15 <= C26;
V16 <= C27;
V17 <= C28;
V18 <= C29;
V19 <= C30;
V20 <= C31;
V21 <= C32;
V22 <= C50;
V23 <= C51;
V24 <= C53;
V25 <= C70;
V26 <= C71;
V27 <= C72;
V28 <= C73;
V29 <= C74;
V30 <= C75;
V31 <= C76;
V32 <= C54a;
V33 <= C54a;
V34 <= C54b;
V35 <= C55;
V49 <= C86;
TESTING: PROCESS
BEGIN
wait for 1 ns;
assert (V1(0) = C1) report " error in initializing S1" severity error;
assert (V2(0) = C4) report " error in initializing S2" severity error;
assert (V3(0) = C5) report " error in initializing S3" severity error;
assert (V4(0) = C6) report " error in initializing S4" severity error;
assert (V5(0) = C7) report " error in initializing S5" severity error;
assert (V6(0) = C8) report " error in initializing S6" severity error;
assert (V7(0) = C9) report " error in initializing S7" severity error;
assert V8 = C19 report " error in initializing S8" severity error;
assert V9 = C20 report " error in initializing S9" severity error;
assert V10 = C21 report " error in initializing S10" severity error;
assert V11 = C22 report " error in initializing S11" severity error;
assert V12 = C23 report " error in initializing S12" severity error;
assert V13 = C24 report " error in initializing S13" severity error;
assert V14 = C25 report " error in initializing S14" severity error;
assert V15 = C26 report " error in initializing S15" severity error;
assert V16 = C27 report " error in initializing S16" severity error;
assert V17 = C28 report " error in initializing S17" severity error;
assert V18 = C29 report " error in initializing S18" severity error;
assert V19 = C30 report " error in initializing S19" severity error;
assert V20 = C31 report " error in initializing S20" severity error;
assert V21 = C32 report " error in initializing S21" severity error;
assert V22 = C50 report " error in initializing S22" severity error;
assert V23 = C51 report " error in initializing S23" severity error;
assert V24 = C53 report " error in initializing S24" severity error;
assert V25 = C70 report " error in initializing S25" severity error;
assert V26 = C71 report " error in initializing S26" severity error;
assert V27 = C72 report " error in initializing S27" severity error;
assert V28 = C73 report " error in initializing S28" severity error;
assert V29 = C74 report " error in initializing S29" severity error;
assert V30 = C75 report " error in initializing S30" severity error;
assert V31 = C76 report " error in initializing S31" severity error;
assert V32 = C54a report " error in initializing S32" severity error;
assert V33 = C54a report " error in initializing S33" severity error;
assert V34= C54b report " error in initializing S34" severity error;
assert V35 = C55 report " error in initializing S35" severity error;
assert V49= C86 report " error in initializing S49" severity error;
assert NOT( (V1(0) = C1) and
(V2(0) = C4) and
(V3(0) = C5) and
(V4(0) = C6) and
(V5(0) = C7) and
(V6(0) = C8) and
(V7(0) = C9) and
V8 = C19 and
V9 = C20 and
V10 = C21 and
V11 = C22 and
V12 = C23 and
V13 = C24 and
V14 = C25 and
V15 = C26 and
V16 = C27 and
V17 = C28 and
V18 = C29 and
V19 = C30 and
V20 = C31 and
V21 = C32 and
V22 = C50 and
V23 = C51 and
V24 = C53 and
V25 = C70 and
V26 = C71 and
V27 = C72 and
V28 = C73 and
V29 = C74 and
V30 = C75 and
V31 = C76 and
V32 = C54a and
V33 = C54a and
V34= C54b and
V35 = C55 and
V49= C86 )
report "***PASSED TEST: c01s01b01x01p05n02i00749"
severity NOTE;
assert ( (V1(0) = C1) and
(V2(0) = C4) and
(V3(0) = C5) and
(V4(0) = C6) and
(V5(0) = C7) and
(V6(0) = C8) and
(V7(0) = C9) and
V8 = C19 and
V9 = C20 and
V10 = C21 and
V11 = C22 and
V12 = C23 and
V13 = C24 and
V14 = C25 and
V15 = C26 and
V16 = C27 and
V17 = C28 and
V18 = C29 and
V19 = C30 and
V20 = C31 and
V21 = C32 and
V22 = C50 and
V23 = C51 and
V24 = C53 and
V25 = C70 and
V26 = C71 and
V27 = C72 and
V28 = C73 and
V29 = C74 and
V30 = C75 and
V31 = C76 and
V32 = C54a and
V33 = C54a and
V34= C54b and
V35 = C55 and
V49= C86 )
report "***FAILED TEST: c01s01b01x01p05n02i00749 - Generic can be used to specify the size of ports."
severity ERROR;
wait;
END PROCESS TESTING;
END arch;
|
entity tb_cmp02 is
end tb_cmp02;
library ieee;
use ieee.std_logic_1164.all;
architecture behav of tb_cmp02 is
signal l : std_logic_vector(3 downto 0);
signal r : natural;
signal eq : std_logic;
signal ne : std_logic;
signal lt : std_logic;
signal le : std_logic;
signal ge : std_logic;
signal gt : std_logic;
begin
cmp02_1: entity work.cmp02
port map (
l => l,
r => r,
eq => eq,
ne => ne,
lt => lt,
le => le,
ge => ge,
gt => gt);
process
begin
l <= x"5";
r <= 7;
wait for 1 ns;
assert eq = '0' severity failure;
assert ne = '1' severity failure;
assert lt = '1' severity failure;
assert le = '1' severity failure;
assert ge = '0' severity failure;
assert gt = '0' severity failure;
l <= x"a";
r <= 7;
wait for 1 ns;
assert eq = '0' severity failure;
assert ne = '1' severity failure;
assert lt = '0' severity failure;
assert le = '0' severity failure;
assert ge = '1' severity failure;
assert gt = '1' severity failure;
l <= x"9";
r <= 9;
wait for 1 ns;
assert eq = '1' severity failure;
assert ne = '0' severity failure;
assert lt = '0' severity failure;
assert le = '1' severity failure;
assert ge = '1' severity failure;
assert gt = '0' severity failure;
wait;
end process;
end behav;
|
--------------------------------------------------------------------------------
-- Company:
-- Engineer:
--
-- Create Date: 23:50:16 04/30/2015
-- Design Name:
-- Module Name: C:/IRIS/IRIS/IRIS_TB.vhd
-- Project Name: IRIS
-- Target Device:
-- Tool versions:
-- Description:
--
-- VHDL Test Bench Created by ISE for module: IRIS
--
-- Dependencies:
--
-- Revision:
-- Revision 0.01 - File Created
-- Additional Comments:
--
-- Notes:
-- This testbench has been automatically generated using types std_logic and
-- std_logic_vector for the ports of the unit under test. Xilinx recommends
-- that these types always be used for the top-level I/O of a design in order
-- to guarantee that the testbench will bind correctly to the post-implementation
-- simulation model.
--------------------------------------------------------------------------------
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
use ieee.std_logic_unsigned.all;
use ieee.std_logic_arith.all;
use std.textio.all;
use work.IRIS_Pack.all;
-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
--USE ieee.numeric_std.ALL;
ENTITY IRIS_TB IS
END IRIS_TB;
ARCHITECTURE behavior OF IRIS_TB IS
-- Component Declaration for the Unit Under Test (UUT)
COMPONENT IRIS
PORT(
Clk : IN std_logic;
FT2232_FSClk : OUT std_logic;
FT2232_FSDO : IN std_logic;
FT2232_FSDI : OUT std_logic;
FT2232_FSCTS : IN std_logic;
ADC_Sck : OUT std_logic;
ADC_Cnv : OUT std_logic;
ADC_Data : IN std_logic;
TCD_Clk : out std_logic;
TCD_Icg : OUT std_logic;
TCD_Sh : OUT std_logic
);
END COMPONENT;
--Inputs
signal Clk : std_logic := '0';
signal FT2232_FSDO : std_logic := '0';
signal FT2232_FSCTS : std_logic := '0';
signal ADC_Busy : std_logic := '0';
signal ADC_Data : std_logic := '0';
--Outputs
signal OSC_out : std_logic;
signal FT2232_FSClk : std_logic;
signal FT2232_FSDI : std_logic;
signal ADC_Sck : std_logic;
signal ADC_Cnv : std_logic;
signal TCD_Clk : std_logic;
signal TCD_Icg : std_logic;
signal TCD_Sh : std_logic;
-- FT2232 sim
signal FT_Data : std_logic_vector(7 downto 0);
signal FT_Data_MSB : std_logic_vector(7 downto 0);
signal FT_Data_LSB : std_logic_vector(7 downto 0);
signal FT_Data_Ready : std_logic;
signal i : integer;
-- Clock period definitions
constant Clk_period : time := 25 ns;
BEGIN
-- Instantiate the Unit Under Test (UUT)
uut: IRIS PORT MAP (
Clk => Clk,
FT2232_FSClk => FT2232_FSClk,
FT2232_FSDO => FT2232_FSDO,
FT2232_FSDI => FT2232_FSDI,
FT2232_FSCTS => FT2232_FSCTS,
ADC_Sck => ADC_Sck,
ADC_Cnv => ADC_Cnv,
ADC_Data => ADC_Data,
TCD_Clk => TCD_Clk,
TCD_Icg => TCD_Icg,
TCD_Sh => TCD_Sh
);
FT_Sim: process
variable l : line;
begin
FT_Data_Ready <= '0';
FT_Data <= X"00";
FT2232_FSDO <= '1';
FT2232_FSCTS <= '0';
wait for 1 ms;
FT_Data <= X"00";
wait for 1 ns;
FT_Send_Byte ( FT_Data, FT2232_FSClk, FT2232_FSDO );
FT2232_FSCTS <= '1';
FT_Data_Ready <= '0';
for i in 0 to 4095 loop
FT_Read_Byte(FT_Data_MSB, FT_Data_Ready, FT2232_FSClk, FT2232_FSDI );
FT_Read_Byte(FT_Data_LSB, FT_Data_Ready, FT2232_FSClk, FT2232_FSDI );
write(l, conv_integer(FT_Data_MSB)*256+conv_integer(FT_Data_LSB));
writeline(output,l);
end loop;
wait for 4 ms;
FT_Data <= "01000000";
wait for 1ns;
FT_Send_Byte ( FT_Data, FT2232_FSClk, FT2232_FSDO );
FT2232_FSCTS <= '1';
FT_Data_Ready <= '0';
for i in 0 to 4095 loop
FT_Read_Byte(FT_Data_MSB, FT_Data_Ready, FT2232_FSClk, FT2232_FSDI );
FT_Read_Byte(FT_Data_LSB, FT_Data_Ready, FT2232_FSClk, FT2232_FSDI );
write(l, conv_integer(FT_Data_MSB)*256+conv_integer(FT_Data_LSB));
writeline(output,l);
end loop;
wait;
end process;
-- Clock process definitions
Clk_process :process
begin
Clk <= '0';
wait for Clk_period/2;
Clk <= '1';
wait for Clk_period/2;
end process;
-- Stimulus process
-- Clock process definitions
ADC_process :process
variable i : integer;
variable Data : std_logic_vector(15 downto 0);
begin
ADC_Busy <= '0';
ADC_Data <= '0';
Data := ( others => '0' );
loop
wait until ADC_Cnv = '1' and ADC_Cnv'event;
wait for 13 ns;
ADC_Busy <= '1';
wait for 322 ns; -- tconv max
ADC_Busy <= '0';
wait for 5 ns; -- tdsdobudyl
ADC_Data <= Data(15);
-- Data output
for i in 14 downto 0
loop
wait until ADC_SCK='1' and ADC_SCK'event;
wait for 1 ns; -- thsdo
wait for 9.5 ns; -- tdsdo
ADC_Data <= Data(i);
wait for 39.5 ns; -- 50 ns - thsdo - tdsdo
end loop;
data := data + 1;
if data = NB_PIXELS+1
then data := ( others => '0' );
end if;
end loop;
end process;
END;
|
-- (c) Copyright 1995-2014 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--
-- DO NOT MODIFY THIS FILE.
-- IP VLNV: xilinx.com:ip:blk_mem_gen:8.2
-- IP Revision: 0
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
USE ieee.numeric_std.ALL;
LIBRARY blk_mem_gen_v8_2;
USE blk_mem_gen_v8_2.blk_mem_gen_v8_2;
ENTITY bram IS
PORT (
clka : IN STD_LOGIC;
wea : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
addra : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
dina : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
clkb : IN STD_LOGIC;
addrb : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
doutb : OUT STD_LOGIC_VECTOR(15 DOWNTO 0)
);
END bram;
ARCHITECTURE bram_arch OF bram IS
ATTRIBUTE DowngradeIPIdentifiedWarnings : string;
ATTRIBUTE DowngradeIPIdentifiedWarnings OF bram_arch: ARCHITECTURE IS "yes";
COMPONENT blk_mem_gen_v8_2 IS
GENERIC (
C_FAMILY : STRING;
C_XDEVICEFAMILY : STRING;
C_ELABORATION_DIR : STRING;
C_INTERFACE_TYPE : INTEGER;
C_AXI_TYPE : INTEGER;
C_AXI_SLAVE_TYPE : INTEGER;
C_USE_BRAM_BLOCK : INTEGER;
C_ENABLE_32BIT_ADDRESS : INTEGER;
C_CTRL_ECC_ALGO : STRING;
C_HAS_AXI_ID : INTEGER;
C_AXI_ID_WIDTH : INTEGER;
C_MEM_TYPE : INTEGER;
C_BYTE_SIZE : INTEGER;
C_ALGORITHM : INTEGER;
C_PRIM_TYPE : INTEGER;
C_LOAD_INIT_FILE : INTEGER;
C_INIT_FILE_NAME : STRING;
C_INIT_FILE : STRING;
C_USE_DEFAULT_DATA : INTEGER;
C_DEFAULT_DATA : STRING;
C_HAS_RSTA : INTEGER;
C_RST_PRIORITY_A : STRING;
C_RSTRAM_A : INTEGER;
C_INITA_VAL : STRING;
C_HAS_ENA : INTEGER;
C_HAS_REGCEA : INTEGER;
C_USE_BYTE_WEA : INTEGER;
C_WEA_WIDTH : INTEGER;
C_WRITE_MODE_A : STRING;
C_WRITE_WIDTH_A : INTEGER;
C_READ_WIDTH_A : INTEGER;
C_WRITE_DEPTH_A : INTEGER;
C_READ_DEPTH_A : INTEGER;
C_ADDRA_WIDTH : INTEGER;
C_HAS_RSTB : INTEGER;
C_RST_PRIORITY_B : STRING;
C_RSTRAM_B : INTEGER;
C_INITB_VAL : STRING;
C_HAS_ENB : INTEGER;
C_HAS_REGCEB : INTEGER;
C_USE_BYTE_WEB : INTEGER;
C_WEB_WIDTH : INTEGER;
C_WRITE_MODE_B : STRING;
C_WRITE_WIDTH_B : INTEGER;
C_READ_WIDTH_B : INTEGER;
C_WRITE_DEPTH_B : INTEGER;
C_READ_DEPTH_B : INTEGER;
C_ADDRB_WIDTH : INTEGER;
C_HAS_MEM_OUTPUT_REGS_A : INTEGER;
C_HAS_MEM_OUTPUT_REGS_B : INTEGER;
C_HAS_MUX_OUTPUT_REGS_A : INTEGER;
C_HAS_MUX_OUTPUT_REGS_B : INTEGER;
C_MUX_PIPELINE_STAGES : INTEGER;
C_HAS_SOFTECC_INPUT_REGS_A : INTEGER;
C_HAS_SOFTECC_OUTPUT_REGS_B : INTEGER;
C_USE_SOFTECC : INTEGER;
C_USE_ECC : INTEGER;
C_EN_ECC_PIPE : INTEGER;
C_HAS_INJECTERR : INTEGER;
C_SIM_COLLISION_CHECK : STRING;
C_COMMON_CLK : INTEGER;
C_DISABLE_WARN_BHV_COLL : INTEGER;
C_EN_SLEEP_PIN : INTEGER;
C_DISABLE_WARN_BHV_RANGE : INTEGER;
C_COUNT_36K_BRAM : STRING;
C_COUNT_18K_BRAM : STRING;
C_EST_POWER_SUMMARY : STRING
);
PORT (
clka : IN STD_LOGIC;
rsta : IN STD_LOGIC;
ena : IN STD_LOGIC;
regcea : IN STD_LOGIC;
wea : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
addra : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
dina : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
douta : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
clkb : IN STD_LOGIC;
rstb : IN STD_LOGIC;
enb : IN STD_LOGIC;
regceb : IN STD_LOGIC;
web : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
addrb : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
dinb : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
doutb : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
injectsbiterr : IN STD_LOGIC;
injectdbiterr : IN STD_LOGIC;
eccpipece : IN STD_LOGIC;
sbiterr : OUT STD_LOGIC;
dbiterr : OUT STD_LOGIC;
rdaddrecc : OUT STD_LOGIC_VECTOR(10 DOWNTO 0);
sleep : IN STD_LOGIC;
s_aclk : IN STD_LOGIC;
s_aresetn : IN STD_LOGIC;
s_axi_awid : IN STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_awaddr : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
s_axi_awlen : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
s_axi_awsize : IN STD_LOGIC_VECTOR(2 DOWNTO 0);
s_axi_awburst : IN STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_awvalid : IN STD_LOGIC;
s_axi_awready : OUT STD_LOGIC;
s_axi_wdata : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
s_axi_wstrb : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
s_axi_wlast : IN STD_LOGIC;
s_axi_wvalid : IN STD_LOGIC;
s_axi_wready : OUT STD_LOGIC;
s_axi_bid : OUT STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_bresp : OUT STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_bvalid : OUT STD_LOGIC;
s_axi_bready : IN STD_LOGIC;
s_axi_arid : IN STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_araddr : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
s_axi_arlen : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
s_axi_arsize : IN STD_LOGIC_VECTOR(2 DOWNTO 0);
s_axi_arburst : IN STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_arvalid : IN STD_LOGIC;
s_axi_arready : OUT STD_LOGIC;
s_axi_rid : OUT STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_rdata : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
s_axi_rresp : OUT STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_rlast : OUT STD_LOGIC;
s_axi_rvalid : OUT STD_LOGIC;
s_axi_rready : IN STD_LOGIC;
s_axi_injectsbiterr : IN STD_LOGIC;
s_axi_injectdbiterr : IN STD_LOGIC;
s_axi_sbiterr : OUT STD_LOGIC;
s_axi_dbiterr : OUT STD_LOGIC;
s_axi_rdaddrecc : OUT STD_LOGIC_VECTOR(10 DOWNTO 0)
);
END COMPONENT blk_mem_gen_v8_2;
ATTRIBUTE X_CORE_INFO : STRING;
ATTRIBUTE X_CORE_INFO OF bram_arch: ARCHITECTURE IS "blk_mem_gen_v8_2,Vivado 2014.1";
ATTRIBUTE CHECK_LICENSE_TYPE : STRING;
ATTRIBUTE CHECK_LICENSE_TYPE OF bram_arch : ARCHITECTURE IS "bram,blk_mem_gen_v8_2,{}";
ATTRIBUTE CORE_GENERATION_INFO : STRING;
ATTRIBUTE CORE_GENERATION_INFO OF bram_arch: ARCHITECTURE IS "bram,blk_mem_gen_v8_2,{x_ipProduct=Vivado 2014.1,x_ipVendor=xilinx.com,x_ipLibrary=ip,x_ipName=blk_mem_gen,x_ipVersion=8.2,x_ipCoreRevision=0,x_ipLanguage=VHDL,C_FAMILY=zynq,C_XDEVICEFAMILY=zynq,C_ELABORATION_DIR=./,C_INTERFACE_TYPE=0,C_AXI_TYPE=1,C_AXI_SLAVE_TYPE=0,C_USE_BRAM_BLOCK=0,C_ENABLE_32BIT_ADDRESS=0,C_CTRL_ECC_ALGO=NONE,C_HAS_AXI_ID=0,C_AXI_ID_WIDTH=4,C_MEM_TYPE=1,C_BYTE_SIZE=9,C_ALGORITHM=1,C_PRIM_TYPE=1,C_LOAD_INIT_FILE=0,C_INIT_FILE_NAME=no_coe_file_loaded,C_INIT_FILE=bram.mem,C_USE_DEFAULT_DATA=0,C_DEFAULT_DATA=0,C_HAS_RSTA=0,C_RST_PRIORITY_A=CE,C_RSTRAM_A=0,C_INITA_VAL=0,C_HAS_ENA=0,C_HAS_REGCEA=0,C_USE_BYTE_WEA=0,C_WEA_WIDTH=1,C_WRITE_MODE_A=WRITE_FIRST,C_WRITE_WIDTH_A=16,C_READ_WIDTH_A=16,C_WRITE_DEPTH_A=2048,C_READ_DEPTH_A=2048,C_ADDRA_WIDTH=11,C_HAS_RSTB=0,C_RST_PRIORITY_B=CE,C_RSTRAM_B=0,C_INITB_VAL=0,C_HAS_ENB=0,C_HAS_REGCEB=0,C_USE_BYTE_WEB=0,C_WEB_WIDTH=1,C_WRITE_MODE_B=WRITE_FIRST,C_WRITE_WIDTH_B=16,C_READ_WIDTH_B=16,C_WRITE_DEPTH_B=2048,C_READ_DEPTH_B=2048,C_ADDRB_WIDTH=11,C_HAS_MEM_OUTPUT_REGS_A=0,C_HAS_MEM_OUTPUT_REGS_B=1,C_HAS_MUX_OUTPUT_REGS_A=0,C_HAS_MUX_OUTPUT_REGS_B=0,C_MUX_PIPELINE_STAGES=0,C_HAS_SOFTECC_INPUT_REGS_A=0,C_HAS_SOFTECC_OUTPUT_REGS_B=0,C_USE_SOFTECC=0,C_USE_ECC=0,C_EN_ECC_PIPE=0,C_HAS_INJECTERR=0,C_SIM_COLLISION_CHECK=ALL,C_COMMON_CLK=0,C_DISABLE_WARN_BHV_COLL=0,C_EN_SLEEP_PIN=0,C_DISABLE_WARN_BHV_RANGE=0,C_COUNT_36K_BRAM=1,C_COUNT_18K_BRAM=0,C_EST_POWER_SUMMARY=Estimated Power for IP _ 5.11005 mW}";
ATTRIBUTE X_INTERFACE_INFO : STRING;
ATTRIBUTE X_INTERFACE_INFO OF clka: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA CLK";
ATTRIBUTE X_INTERFACE_INFO OF wea: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA WE";
ATTRIBUTE X_INTERFACE_INFO OF addra: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA ADDR";
ATTRIBUTE X_INTERFACE_INFO OF dina: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA DIN";
ATTRIBUTE X_INTERFACE_INFO OF clkb: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB CLK";
ATTRIBUTE X_INTERFACE_INFO OF addrb: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB ADDR";
ATTRIBUTE X_INTERFACE_INFO OF doutb: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB DOUT";
BEGIN
U0 : blk_mem_gen_v8_2
GENERIC MAP (
C_FAMILY => "zynq",
C_XDEVICEFAMILY => "zynq",
C_ELABORATION_DIR => "./",
C_INTERFACE_TYPE => 0,
C_AXI_TYPE => 1,
C_AXI_SLAVE_TYPE => 0,
C_USE_BRAM_BLOCK => 0,
C_ENABLE_32BIT_ADDRESS => 0,
C_CTRL_ECC_ALGO => "NONE",
C_HAS_AXI_ID => 0,
C_AXI_ID_WIDTH => 4,
C_MEM_TYPE => 1,
C_BYTE_SIZE => 9,
C_ALGORITHM => 1,
C_PRIM_TYPE => 1,
C_LOAD_INIT_FILE => 0,
C_INIT_FILE_NAME => "no_coe_file_loaded",
C_INIT_FILE => "bram.mem",
C_USE_DEFAULT_DATA => 0,
C_DEFAULT_DATA => "0",
C_HAS_RSTA => 0,
C_RST_PRIORITY_A => "CE",
C_RSTRAM_A => 0,
C_INITA_VAL => "0",
C_HAS_ENA => 0,
C_HAS_REGCEA => 0,
C_USE_BYTE_WEA => 0,
C_WEA_WIDTH => 1,
C_WRITE_MODE_A => "WRITE_FIRST",
C_WRITE_WIDTH_A => 16,
C_READ_WIDTH_A => 16,
C_WRITE_DEPTH_A => 2048,
C_READ_DEPTH_A => 2048,
C_ADDRA_WIDTH => 11,
C_HAS_RSTB => 0,
C_RST_PRIORITY_B => "CE",
C_RSTRAM_B => 0,
C_INITB_VAL => "0",
C_HAS_ENB => 0,
C_HAS_REGCEB => 0,
C_USE_BYTE_WEB => 0,
C_WEB_WIDTH => 1,
C_WRITE_MODE_B => "WRITE_FIRST",
C_WRITE_WIDTH_B => 16,
C_READ_WIDTH_B => 16,
C_WRITE_DEPTH_B => 2048,
C_READ_DEPTH_B => 2048,
C_ADDRB_WIDTH => 11,
C_HAS_MEM_OUTPUT_REGS_A => 0,
C_HAS_MEM_OUTPUT_REGS_B => 1,
C_HAS_MUX_OUTPUT_REGS_A => 0,
C_HAS_MUX_OUTPUT_REGS_B => 0,
C_MUX_PIPELINE_STAGES => 0,
C_HAS_SOFTECC_INPUT_REGS_A => 0,
C_HAS_SOFTECC_OUTPUT_REGS_B => 0,
C_USE_SOFTECC => 0,
C_USE_ECC => 0,
C_EN_ECC_PIPE => 0,
C_HAS_INJECTERR => 0,
C_SIM_COLLISION_CHECK => "ALL",
C_COMMON_CLK => 0,
C_DISABLE_WARN_BHV_COLL => 0,
C_EN_SLEEP_PIN => 0,
C_DISABLE_WARN_BHV_RANGE => 0,
C_COUNT_36K_BRAM => "1",
C_COUNT_18K_BRAM => "0",
C_EST_POWER_SUMMARY => "Estimated Power for IP : 5.11005 mW"
)
PORT MAP (
clka => clka,
rsta => '0',
ena => '0',
regcea => '0',
wea => wea,
addra => addra,
dina => dina,
clkb => clkb,
rstb => '0',
enb => '0',
regceb => '0',
web => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 1)),
addrb => addrb,
dinb => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 16)),
doutb => doutb,
injectsbiterr => '0',
injectdbiterr => '0',
eccpipece => '0',
sleep => '0',
s_aclk => '0',
s_aresetn => '0',
s_axi_awid => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 4)),
s_axi_awaddr => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 32)),
s_axi_awlen => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 8)),
s_axi_awsize => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 3)),
s_axi_awburst => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 2)),
s_axi_awvalid => '0',
s_axi_wdata => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 16)),
s_axi_wstrb => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 1)),
s_axi_wlast => '0',
s_axi_wvalid => '0',
s_axi_bready => '0',
s_axi_arid => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 4)),
s_axi_araddr => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 32)),
s_axi_arlen => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 8)),
s_axi_arsize => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 3)),
s_axi_arburst => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 2)),
s_axi_arvalid => '0',
s_axi_rready => '0',
s_axi_injectsbiterr => '0',
s_axi_injectdbiterr => '0'
);
END bram_arch;
|
-- (c) Copyright 1995-2014 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--
-- DO NOT MODIFY THIS FILE.
-- IP VLNV: xilinx.com:ip:blk_mem_gen:8.2
-- IP Revision: 0
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
USE ieee.numeric_std.ALL;
LIBRARY blk_mem_gen_v8_2;
USE blk_mem_gen_v8_2.blk_mem_gen_v8_2;
ENTITY bram IS
PORT (
clka : IN STD_LOGIC;
wea : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
addra : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
dina : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
clkb : IN STD_LOGIC;
addrb : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
doutb : OUT STD_LOGIC_VECTOR(15 DOWNTO 0)
);
END bram;
ARCHITECTURE bram_arch OF bram IS
ATTRIBUTE DowngradeIPIdentifiedWarnings : string;
ATTRIBUTE DowngradeIPIdentifiedWarnings OF bram_arch: ARCHITECTURE IS "yes";
COMPONENT blk_mem_gen_v8_2 IS
GENERIC (
C_FAMILY : STRING;
C_XDEVICEFAMILY : STRING;
C_ELABORATION_DIR : STRING;
C_INTERFACE_TYPE : INTEGER;
C_AXI_TYPE : INTEGER;
C_AXI_SLAVE_TYPE : INTEGER;
C_USE_BRAM_BLOCK : INTEGER;
C_ENABLE_32BIT_ADDRESS : INTEGER;
C_CTRL_ECC_ALGO : STRING;
C_HAS_AXI_ID : INTEGER;
C_AXI_ID_WIDTH : INTEGER;
C_MEM_TYPE : INTEGER;
C_BYTE_SIZE : INTEGER;
C_ALGORITHM : INTEGER;
C_PRIM_TYPE : INTEGER;
C_LOAD_INIT_FILE : INTEGER;
C_INIT_FILE_NAME : STRING;
C_INIT_FILE : STRING;
C_USE_DEFAULT_DATA : INTEGER;
C_DEFAULT_DATA : STRING;
C_HAS_RSTA : INTEGER;
C_RST_PRIORITY_A : STRING;
C_RSTRAM_A : INTEGER;
C_INITA_VAL : STRING;
C_HAS_ENA : INTEGER;
C_HAS_REGCEA : INTEGER;
C_USE_BYTE_WEA : INTEGER;
C_WEA_WIDTH : INTEGER;
C_WRITE_MODE_A : STRING;
C_WRITE_WIDTH_A : INTEGER;
C_READ_WIDTH_A : INTEGER;
C_WRITE_DEPTH_A : INTEGER;
C_READ_DEPTH_A : INTEGER;
C_ADDRA_WIDTH : INTEGER;
C_HAS_RSTB : INTEGER;
C_RST_PRIORITY_B : STRING;
C_RSTRAM_B : INTEGER;
C_INITB_VAL : STRING;
C_HAS_ENB : INTEGER;
C_HAS_REGCEB : INTEGER;
C_USE_BYTE_WEB : INTEGER;
C_WEB_WIDTH : INTEGER;
C_WRITE_MODE_B : STRING;
C_WRITE_WIDTH_B : INTEGER;
C_READ_WIDTH_B : INTEGER;
C_WRITE_DEPTH_B : INTEGER;
C_READ_DEPTH_B : INTEGER;
C_ADDRB_WIDTH : INTEGER;
C_HAS_MEM_OUTPUT_REGS_A : INTEGER;
C_HAS_MEM_OUTPUT_REGS_B : INTEGER;
C_HAS_MUX_OUTPUT_REGS_A : INTEGER;
C_HAS_MUX_OUTPUT_REGS_B : INTEGER;
C_MUX_PIPELINE_STAGES : INTEGER;
C_HAS_SOFTECC_INPUT_REGS_A : INTEGER;
C_HAS_SOFTECC_OUTPUT_REGS_B : INTEGER;
C_USE_SOFTECC : INTEGER;
C_USE_ECC : INTEGER;
C_EN_ECC_PIPE : INTEGER;
C_HAS_INJECTERR : INTEGER;
C_SIM_COLLISION_CHECK : STRING;
C_COMMON_CLK : INTEGER;
C_DISABLE_WARN_BHV_COLL : INTEGER;
C_EN_SLEEP_PIN : INTEGER;
C_DISABLE_WARN_BHV_RANGE : INTEGER;
C_COUNT_36K_BRAM : STRING;
C_COUNT_18K_BRAM : STRING;
C_EST_POWER_SUMMARY : STRING
);
PORT (
clka : IN STD_LOGIC;
rsta : IN STD_LOGIC;
ena : IN STD_LOGIC;
regcea : IN STD_LOGIC;
wea : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
addra : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
dina : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
douta : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
clkb : IN STD_LOGIC;
rstb : IN STD_LOGIC;
enb : IN STD_LOGIC;
regceb : IN STD_LOGIC;
web : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
addrb : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
dinb : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
doutb : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
injectsbiterr : IN STD_LOGIC;
injectdbiterr : IN STD_LOGIC;
eccpipece : IN STD_LOGIC;
sbiterr : OUT STD_LOGIC;
dbiterr : OUT STD_LOGIC;
rdaddrecc : OUT STD_LOGIC_VECTOR(10 DOWNTO 0);
sleep : IN STD_LOGIC;
s_aclk : IN STD_LOGIC;
s_aresetn : IN STD_LOGIC;
s_axi_awid : IN STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_awaddr : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
s_axi_awlen : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
s_axi_awsize : IN STD_LOGIC_VECTOR(2 DOWNTO 0);
s_axi_awburst : IN STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_awvalid : IN STD_LOGIC;
s_axi_awready : OUT STD_LOGIC;
s_axi_wdata : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
s_axi_wstrb : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
s_axi_wlast : IN STD_LOGIC;
s_axi_wvalid : IN STD_LOGIC;
s_axi_wready : OUT STD_LOGIC;
s_axi_bid : OUT STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_bresp : OUT STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_bvalid : OUT STD_LOGIC;
s_axi_bready : IN STD_LOGIC;
s_axi_arid : IN STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_araddr : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
s_axi_arlen : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
s_axi_arsize : IN STD_LOGIC_VECTOR(2 DOWNTO 0);
s_axi_arburst : IN STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_arvalid : IN STD_LOGIC;
s_axi_arready : OUT STD_LOGIC;
s_axi_rid : OUT STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_rdata : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
s_axi_rresp : OUT STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_rlast : OUT STD_LOGIC;
s_axi_rvalid : OUT STD_LOGIC;
s_axi_rready : IN STD_LOGIC;
s_axi_injectsbiterr : IN STD_LOGIC;
s_axi_injectdbiterr : IN STD_LOGIC;
s_axi_sbiterr : OUT STD_LOGIC;
s_axi_dbiterr : OUT STD_LOGIC;
s_axi_rdaddrecc : OUT STD_LOGIC_VECTOR(10 DOWNTO 0)
);
END COMPONENT blk_mem_gen_v8_2;
ATTRIBUTE X_CORE_INFO : STRING;
ATTRIBUTE X_CORE_INFO OF bram_arch: ARCHITECTURE IS "blk_mem_gen_v8_2,Vivado 2014.1";
ATTRIBUTE CHECK_LICENSE_TYPE : STRING;
ATTRIBUTE CHECK_LICENSE_TYPE OF bram_arch : ARCHITECTURE IS "bram,blk_mem_gen_v8_2,{}";
ATTRIBUTE CORE_GENERATION_INFO : STRING;
ATTRIBUTE CORE_GENERATION_INFO OF bram_arch: ARCHITECTURE IS "bram,blk_mem_gen_v8_2,{x_ipProduct=Vivado 2014.1,x_ipVendor=xilinx.com,x_ipLibrary=ip,x_ipName=blk_mem_gen,x_ipVersion=8.2,x_ipCoreRevision=0,x_ipLanguage=VHDL,C_FAMILY=zynq,C_XDEVICEFAMILY=zynq,C_ELABORATION_DIR=./,C_INTERFACE_TYPE=0,C_AXI_TYPE=1,C_AXI_SLAVE_TYPE=0,C_USE_BRAM_BLOCK=0,C_ENABLE_32BIT_ADDRESS=0,C_CTRL_ECC_ALGO=NONE,C_HAS_AXI_ID=0,C_AXI_ID_WIDTH=4,C_MEM_TYPE=1,C_BYTE_SIZE=9,C_ALGORITHM=1,C_PRIM_TYPE=1,C_LOAD_INIT_FILE=0,C_INIT_FILE_NAME=no_coe_file_loaded,C_INIT_FILE=bram.mem,C_USE_DEFAULT_DATA=0,C_DEFAULT_DATA=0,C_HAS_RSTA=0,C_RST_PRIORITY_A=CE,C_RSTRAM_A=0,C_INITA_VAL=0,C_HAS_ENA=0,C_HAS_REGCEA=0,C_USE_BYTE_WEA=0,C_WEA_WIDTH=1,C_WRITE_MODE_A=WRITE_FIRST,C_WRITE_WIDTH_A=16,C_READ_WIDTH_A=16,C_WRITE_DEPTH_A=2048,C_READ_DEPTH_A=2048,C_ADDRA_WIDTH=11,C_HAS_RSTB=0,C_RST_PRIORITY_B=CE,C_RSTRAM_B=0,C_INITB_VAL=0,C_HAS_ENB=0,C_HAS_REGCEB=0,C_USE_BYTE_WEB=0,C_WEB_WIDTH=1,C_WRITE_MODE_B=WRITE_FIRST,C_WRITE_WIDTH_B=16,C_READ_WIDTH_B=16,C_WRITE_DEPTH_B=2048,C_READ_DEPTH_B=2048,C_ADDRB_WIDTH=11,C_HAS_MEM_OUTPUT_REGS_A=0,C_HAS_MEM_OUTPUT_REGS_B=1,C_HAS_MUX_OUTPUT_REGS_A=0,C_HAS_MUX_OUTPUT_REGS_B=0,C_MUX_PIPELINE_STAGES=0,C_HAS_SOFTECC_INPUT_REGS_A=0,C_HAS_SOFTECC_OUTPUT_REGS_B=0,C_USE_SOFTECC=0,C_USE_ECC=0,C_EN_ECC_PIPE=0,C_HAS_INJECTERR=0,C_SIM_COLLISION_CHECK=ALL,C_COMMON_CLK=0,C_DISABLE_WARN_BHV_COLL=0,C_EN_SLEEP_PIN=0,C_DISABLE_WARN_BHV_RANGE=0,C_COUNT_36K_BRAM=1,C_COUNT_18K_BRAM=0,C_EST_POWER_SUMMARY=Estimated Power for IP _ 5.11005 mW}";
ATTRIBUTE X_INTERFACE_INFO : STRING;
ATTRIBUTE X_INTERFACE_INFO OF clka: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA CLK";
ATTRIBUTE X_INTERFACE_INFO OF wea: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA WE";
ATTRIBUTE X_INTERFACE_INFO OF addra: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA ADDR";
ATTRIBUTE X_INTERFACE_INFO OF dina: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA DIN";
ATTRIBUTE X_INTERFACE_INFO OF clkb: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB CLK";
ATTRIBUTE X_INTERFACE_INFO OF addrb: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB ADDR";
ATTRIBUTE X_INTERFACE_INFO OF doutb: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB DOUT";
BEGIN
U0 : blk_mem_gen_v8_2
GENERIC MAP (
C_FAMILY => "zynq",
C_XDEVICEFAMILY => "zynq",
C_ELABORATION_DIR => "./",
C_INTERFACE_TYPE => 0,
C_AXI_TYPE => 1,
C_AXI_SLAVE_TYPE => 0,
C_USE_BRAM_BLOCK => 0,
C_ENABLE_32BIT_ADDRESS => 0,
C_CTRL_ECC_ALGO => "NONE",
C_HAS_AXI_ID => 0,
C_AXI_ID_WIDTH => 4,
C_MEM_TYPE => 1,
C_BYTE_SIZE => 9,
C_ALGORITHM => 1,
C_PRIM_TYPE => 1,
C_LOAD_INIT_FILE => 0,
C_INIT_FILE_NAME => "no_coe_file_loaded",
C_INIT_FILE => "bram.mem",
C_USE_DEFAULT_DATA => 0,
C_DEFAULT_DATA => "0",
C_HAS_RSTA => 0,
C_RST_PRIORITY_A => "CE",
C_RSTRAM_A => 0,
C_INITA_VAL => "0",
C_HAS_ENA => 0,
C_HAS_REGCEA => 0,
C_USE_BYTE_WEA => 0,
C_WEA_WIDTH => 1,
C_WRITE_MODE_A => "WRITE_FIRST",
C_WRITE_WIDTH_A => 16,
C_READ_WIDTH_A => 16,
C_WRITE_DEPTH_A => 2048,
C_READ_DEPTH_A => 2048,
C_ADDRA_WIDTH => 11,
C_HAS_RSTB => 0,
C_RST_PRIORITY_B => "CE",
C_RSTRAM_B => 0,
C_INITB_VAL => "0",
C_HAS_ENB => 0,
C_HAS_REGCEB => 0,
C_USE_BYTE_WEB => 0,
C_WEB_WIDTH => 1,
C_WRITE_MODE_B => "WRITE_FIRST",
C_WRITE_WIDTH_B => 16,
C_READ_WIDTH_B => 16,
C_WRITE_DEPTH_B => 2048,
C_READ_DEPTH_B => 2048,
C_ADDRB_WIDTH => 11,
C_HAS_MEM_OUTPUT_REGS_A => 0,
C_HAS_MEM_OUTPUT_REGS_B => 1,
C_HAS_MUX_OUTPUT_REGS_A => 0,
C_HAS_MUX_OUTPUT_REGS_B => 0,
C_MUX_PIPELINE_STAGES => 0,
C_HAS_SOFTECC_INPUT_REGS_A => 0,
C_HAS_SOFTECC_OUTPUT_REGS_B => 0,
C_USE_SOFTECC => 0,
C_USE_ECC => 0,
C_EN_ECC_PIPE => 0,
C_HAS_INJECTERR => 0,
C_SIM_COLLISION_CHECK => "ALL",
C_COMMON_CLK => 0,
C_DISABLE_WARN_BHV_COLL => 0,
C_EN_SLEEP_PIN => 0,
C_DISABLE_WARN_BHV_RANGE => 0,
C_COUNT_36K_BRAM => "1",
C_COUNT_18K_BRAM => "0",
C_EST_POWER_SUMMARY => "Estimated Power for IP : 5.11005 mW"
)
PORT MAP (
clka => clka,
rsta => '0',
ena => '0',
regcea => '0',
wea => wea,
addra => addra,
dina => dina,
clkb => clkb,
rstb => '0',
enb => '0',
regceb => '0',
web => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 1)),
addrb => addrb,
dinb => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 16)),
doutb => doutb,
injectsbiterr => '0',
injectdbiterr => '0',
eccpipece => '0',
sleep => '0',
s_aclk => '0',
s_aresetn => '0',
s_axi_awid => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 4)),
s_axi_awaddr => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 32)),
s_axi_awlen => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 8)),
s_axi_awsize => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 3)),
s_axi_awburst => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 2)),
s_axi_awvalid => '0',
s_axi_wdata => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 16)),
s_axi_wstrb => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 1)),
s_axi_wlast => '0',
s_axi_wvalid => '0',
s_axi_bready => '0',
s_axi_arid => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 4)),
s_axi_araddr => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 32)),
s_axi_arlen => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 8)),
s_axi_arsize => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 3)),
s_axi_arburst => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 2)),
s_axi_arvalid => '0',
s_axi_rready => '0',
s_axi_injectsbiterr => '0',
s_axi_injectdbiterr => '0'
);
END bram_arch;
|
-- (c) Copyright 1995-2014 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--
-- DO NOT MODIFY THIS FILE.
-- IP VLNV: xilinx.com:ip:blk_mem_gen:8.2
-- IP Revision: 0
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
USE ieee.numeric_std.ALL;
LIBRARY blk_mem_gen_v8_2;
USE blk_mem_gen_v8_2.blk_mem_gen_v8_2;
ENTITY bram IS
PORT (
clka : IN STD_LOGIC;
wea : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
addra : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
dina : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
clkb : IN STD_LOGIC;
addrb : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
doutb : OUT STD_LOGIC_VECTOR(15 DOWNTO 0)
);
END bram;
ARCHITECTURE bram_arch OF bram IS
ATTRIBUTE DowngradeIPIdentifiedWarnings : string;
ATTRIBUTE DowngradeIPIdentifiedWarnings OF bram_arch: ARCHITECTURE IS "yes";
COMPONENT blk_mem_gen_v8_2 IS
GENERIC (
C_FAMILY : STRING;
C_XDEVICEFAMILY : STRING;
C_ELABORATION_DIR : STRING;
C_INTERFACE_TYPE : INTEGER;
C_AXI_TYPE : INTEGER;
C_AXI_SLAVE_TYPE : INTEGER;
C_USE_BRAM_BLOCK : INTEGER;
C_ENABLE_32BIT_ADDRESS : INTEGER;
C_CTRL_ECC_ALGO : STRING;
C_HAS_AXI_ID : INTEGER;
C_AXI_ID_WIDTH : INTEGER;
C_MEM_TYPE : INTEGER;
C_BYTE_SIZE : INTEGER;
C_ALGORITHM : INTEGER;
C_PRIM_TYPE : INTEGER;
C_LOAD_INIT_FILE : INTEGER;
C_INIT_FILE_NAME : STRING;
C_INIT_FILE : STRING;
C_USE_DEFAULT_DATA : INTEGER;
C_DEFAULT_DATA : STRING;
C_HAS_RSTA : INTEGER;
C_RST_PRIORITY_A : STRING;
C_RSTRAM_A : INTEGER;
C_INITA_VAL : STRING;
C_HAS_ENA : INTEGER;
C_HAS_REGCEA : INTEGER;
C_USE_BYTE_WEA : INTEGER;
C_WEA_WIDTH : INTEGER;
C_WRITE_MODE_A : STRING;
C_WRITE_WIDTH_A : INTEGER;
C_READ_WIDTH_A : INTEGER;
C_WRITE_DEPTH_A : INTEGER;
C_READ_DEPTH_A : INTEGER;
C_ADDRA_WIDTH : INTEGER;
C_HAS_RSTB : INTEGER;
C_RST_PRIORITY_B : STRING;
C_RSTRAM_B : INTEGER;
C_INITB_VAL : STRING;
C_HAS_ENB : INTEGER;
C_HAS_REGCEB : INTEGER;
C_USE_BYTE_WEB : INTEGER;
C_WEB_WIDTH : INTEGER;
C_WRITE_MODE_B : STRING;
C_WRITE_WIDTH_B : INTEGER;
C_READ_WIDTH_B : INTEGER;
C_WRITE_DEPTH_B : INTEGER;
C_READ_DEPTH_B : INTEGER;
C_ADDRB_WIDTH : INTEGER;
C_HAS_MEM_OUTPUT_REGS_A : INTEGER;
C_HAS_MEM_OUTPUT_REGS_B : INTEGER;
C_HAS_MUX_OUTPUT_REGS_A : INTEGER;
C_HAS_MUX_OUTPUT_REGS_B : INTEGER;
C_MUX_PIPELINE_STAGES : INTEGER;
C_HAS_SOFTECC_INPUT_REGS_A : INTEGER;
C_HAS_SOFTECC_OUTPUT_REGS_B : INTEGER;
C_USE_SOFTECC : INTEGER;
C_USE_ECC : INTEGER;
C_EN_ECC_PIPE : INTEGER;
C_HAS_INJECTERR : INTEGER;
C_SIM_COLLISION_CHECK : STRING;
C_COMMON_CLK : INTEGER;
C_DISABLE_WARN_BHV_COLL : INTEGER;
C_EN_SLEEP_PIN : INTEGER;
C_DISABLE_WARN_BHV_RANGE : INTEGER;
C_COUNT_36K_BRAM : STRING;
C_COUNT_18K_BRAM : STRING;
C_EST_POWER_SUMMARY : STRING
);
PORT (
clka : IN STD_LOGIC;
rsta : IN STD_LOGIC;
ena : IN STD_LOGIC;
regcea : IN STD_LOGIC;
wea : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
addra : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
dina : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
douta : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
clkb : IN STD_LOGIC;
rstb : IN STD_LOGIC;
enb : IN STD_LOGIC;
regceb : IN STD_LOGIC;
web : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
addrb : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
dinb : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
doutb : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
injectsbiterr : IN STD_LOGIC;
injectdbiterr : IN STD_LOGIC;
eccpipece : IN STD_LOGIC;
sbiterr : OUT STD_LOGIC;
dbiterr : OUT STD_LOGIC;
rdaddrecc : OUT STD_LOGIC_VECTOR(10 DOWNTO 0);
sleep : IN STD_LOGIC;
s_aclk : IN STD_LOGIC;
s_aresetn : IN STD_LOGIC;
s_axi_awid : IN STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_awaddr : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
s_axi_awlen : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
s_axi_awsize : IN STD_LOGIC_VECTOR(2 DOWNTO 0);
s_axi_awburst : IN STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_awvalid : IN STD_LOGIC;
s_axi_awready : OUT STD_LOGIC;
s_axi_wdata : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
s_axi_wstrb : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
s_axi_wlast : IN STD_LOGIC;
s_axi_wvalid : IN STD_LOGIC;
s_axi_wready : OUT STD_LOGIC;
s_axi_bid : OUT STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_bresp : OUT STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_bvalid : OUT STD_LOGIC;
s_axi_bready : IN STD_LOGIC;
s_axi_arid : IN STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_araddr : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
s_axi_arlen : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
s_axi_arsize : IN STD_LOGIC_VECTOR(2 DOWNTO 0);
s_axi_arburst : IN STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_arvalid : IN STD_LOGIC;
s_axi_arready : OUT STD_LOGIC;
s_axi_rid : OUT STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_rdata : OUT STD_LOGIC_VECTOR(15 DOWNTO 0);
s_axi_rresp : OUT STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_rlast : OUT STD_LOGIC;
s_axi_rvalid : OUT STD_LOGIC;
s_axi_rready : IN STD_LOGIC;
s_axi_injectsbiterr : IN STD_LOGIC;
s_axi_injectdbiterr : IN STD_LOGIC;
s_axi_sbiterr : OUT STD_LOGIC;
s_axi_dbiterr : OUT STD_LOGIC;
s_axi_rdaddrecc : OUT STD_LOGIC_VECTOR(10 DOWNTO 0)
);
END COMPONENT blk_mem_gen_v8_2;
ATTRIBUTE X_CORE_INFO : STRING;
ATTRIBUTE X_CORE_INFO OF bram_arch: ARCHITECTURE IS "blk_mem_gen_v8_2,Vivado 2014.1";
ATTRIBUTE CHECK_LICENSE_TYPE : STRING;
ATTRIBUTE CHECK_LICENSE_TYPE OF bram_arch : ARCHITECTURE IS "bram,blk_mem_gen_v8_2,{}";
ATTRIBUTE CORE_GENERATION_INFO : STRING;
ATTRIBUTE CORE_GENERATION_INFO OF bram_arch: ARCHITECTURE IS "bram,blk_mem_gen_v8_2,{x_ipProduct=Vivado 2014.1,x_ipVendor=xilinx.com,x_ipLibrary=ip,x_ipName=blk_mem_gen,x_ipVersion=8.2,x_ipCoreRevision=0,x_ipLanguage=VHDL,C_FAMILY=zynq,C_XDEVICEFAMILY=zynq,C_ELABORATION_DIR=./,C_INTERFACE_TYPE=0,C_AXI_TYPE=1,C_AXI_SLAVE_TYPE=0,C_USE_BRAM_BLOCK=0,C_ENABLE_32BIT_ADDRESS=0,C_CTRL_ECC_ALGO=NONE,C_HAS_AXI_ID=0,C_AXI_ID_WIDTH=4,C_MEM_TYPE=1,C_BYTE_SIZE=9,C_ALGORITHM=1,C_PRIM_TYPE=1,C_LOAD_INIT_FILE=0,C_INIT_FILE_NAME=no_coe_file_loaded,C_INIT_FILE=bram.mem,C_USE_DEFAULT_DATA=0,C_DEFAULT_DATA=0,C_HAS_RSTA=0,C_RST_PRIORITY_A=CE,C_RSTRAM_A=0,C_INITA_VAL=0,C_HAS_ENA=0,C_HAS_REGCEA=0,C_USE_BYTE_WEA=0,C_WEA_WIDTH=1,C_WRITE_MODE_A=WRITE_FIRST,C_WRITE_WIDTH_A=16,C_READ_WIDTH_A=16,C_WRITE_DEPTH_A=2048,C_READ_DEPTH_A=2048,C_ADDRA_WIDTH=11,C_HAS_RSTB=0,C_RST_PRIORITY_B=CE,C_RSTRAM_B=0,C_INITB_VAL=0,C_HAS_ENB=0,C_HAS_REGCEB=0,C_USE_BYTE_WEB=0,C_WEB_WIDTH=1,C_WRITE_MODE_B=WRITE_FIRST,C_WRITE_WIDTH_B=16,C_READ_WIDTH_B=16,C_WRITE_DEPTH_B=2048,C_READ_DEPTH_B=2048,C_ADDRB_WIDTH=11,C_HAS_MEM_OUTPUT_REGS_A=0,C_HAS_MEM_OUTPUT_REGS_B=1,C_HAS_MUX_OUTPUT_REGS_A=0,C_HAS_MUX_OUTPUT_REGS_B=0,C_MUX_PIPELINE_STAGES=0,C_HAS_SOFTECC_INPUT_REGS_A=0,C_HAS_SOFTECC_OUTPUT_REGS_B=0,C_USE_SOFTECC=0,C_USE_ECC=0,C_EN_ECC_PIPE=0,C_HAS_INJECTERR=0,C_SIM_COLLISION_CHECK=ALL,C_COMMON_CLK=0,C_DISABLE_WARN_BHV_COLL=0,C_EN_SLEEP_PIN=0,C_DISABLE_WARN_BHV_RANGE=0,C_COUNT_36K_BRAM=1,C_COUNT_18K_BRAM=0,C_EST_POWER_SUMMARY=Estimated Power for IP _ 5.11005 mW}";
ATTRIBUTE X_INTERFACE_INFO : STRING;
ATTRIBUTE X_INTERFACE_INFO OF clka: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA CLK";
ATTRIBUTE X_INTERFACE_INFO OF wea: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA WE";
ATTRIBUTE X_INTERFACE_INFO OF addra: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA ADDR";
ATTRIBUTE X_INTERFACE_INFO OF dina: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA DIN";
ATTRIBUTE X_INTERFACE_INFO OF clkb: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB CLK";
ATTRIBUTE X_INTERFACE_INFO OF addrb: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB ADDR";
ATTRIBUTE X_INTERFACE_INFO OF doutb: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB DOUT";
BEGIN
U0 : blk_mem_gen_v8_2
GENERIC MAP (
C_FAMILY => "zynq",
C_XDEVICEFAMILY => "zynq",
C_ELABORATION_DIR => "./",
C_INTERFACE_TYPE => 0,
C_AXI_TYPE => 1,
C_AXI_SLAVE_TYPE => 0,
C_USE_BRAM_BLOCK => 0,
C_ENABLE_32BIT_ADDRESS => 0,
C_CTRL_ECC_ALGO => "NONE",
C_HAS_AXI_ID => 0,
C_AXI_ID_WIDTH => 4,
C_MEM_TYPE => 1,
C_BYTE_SIZE => 9,
C_ALGORITHM => 1,
C_PRIM_TYPE => 1,
C_LOAD_INIT_FILE => 0,
C_INIT_FILE_NAME => "no_coe_file_loaded",
C_INIT_FILE => "bram.mem",
C_USE_DEFAULT_DATA => 0,
C_DEFAULT_DATA => "0",
C_HAS_RSTA => 0,
C_RST_PRIORITY_A => "CE",
C_RSTRAM_A => 0,
C_INITA_VAL => "0",
C_HAS_ENA => 0,
C_HAS_REGCEA => 0,
C_USE_BYTE_WEA => 0,
C_WEA_WIDTH => 1,
C_WRITE_MODE_A => "WRITE_FIRST",
C_WRITE_WIDTH_A => 16,
C_READ_WIDTH_A => 16,
C_WRITE_DEPTH_A => 2048,
C_READ_DEPTH_A => 2048,
C_ADDRA_WIDTH => 11,
C_HAS_RSTB => 0,
C_RST_PRIORITY_B => "CE",
C_RSTRAM_B => 0,
C_INITB_VAL => "0",
C_HAS_ENB => 0,
C_HAS_REGCEB => 0,
C_USE_BYTE_WEB => 0,
C_WEB_WIDTH => 1,
C_WRITE_MODE_B => "WRITE_FIRST",
C_WRITE_WIDTH_B => 16,
C_READ_WIDTH_B => 16,
C_WRITE_DEPTH_B => 2048,
C_READ_DEPTH_B => 2048,
C_ADDRB_WIDTH => 11,
C_HAS_MEM_OUTPUT_REGS_A => 0,
C_HAS_MEM_OUTPUT_REGS_B => 1,
C_HAS_MUX_OUTPUT_REGS_A => 0,
C_HAS_MUX_OUTPUT_REGS_B => 0,
C_MUX_PIPELINE_STAGES => 0,
C_HAS_SOFTECC_INPUT_REGS_A => 0,
C_HAS_SOFTECC_OUTPUT_REGS_B => 0,
C_USE_SOFTECC => 0,
C_USE_ECC => 0,
C_EN_ECC_PIPE => 0,
C_HAS_INJECTERR => 0,
C_SIM_COLLISION_CHECK => "ALL",
C_COMMON_CLK => 0,
C_DISABLE_WARN_BHV_COLL => 0,
C_EN_SLEEP_PIN => 0,
C_DISABLE_WARN_BHV_RANGE => 0,
C_COUNT_36K_BRAM => "1",
C_COUNT_18K_BRAM => "0",
C_EST_POWER_SUMMARY => "Estimated Power for IP : 5.11005 mW"
)
PORT MAP (
clka => clka,
rsta => '0',
ena => '0',
regcea => '0',
wea => wea,
addra => addra,
dina => dina,
clkb => clkb,
rstb => '0',
enb => '0',
regceb => '0',
web => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 1)),
addrb => addrb,
dinb => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 16)),
doutb => doutb,
injectsbiterr => '0',
injectdbiterr => '0',
eccpipece => '0',
sleep => '0',
s_aclk => '0',
s_aresetn => '0',
s_axi_awid => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 4)),
s_axi_awaddr => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 32)),
s_axi_awlen => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 8)),
s_axi_awsize => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 3)),
s_axi_awburst => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 2)),
s_axi_awvalid => '0',
s_axi_wdata => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 16)),
s_axi_wstrb => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 1)),
s_axi_wlast => '0',
s_axi_wvalid => '0',
s_axi_bready => '0',
s_axi_arid => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 4)),
s_axi_araddr => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 32)),
s_axi_arlen => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 8)),
s_axi_arsize => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 3)),
s_axi_arburst => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 2)),
s_axi_arvalid => '0',
s_axi_rready => '0',
s_axi_injectsbiterr => '0',
s_axi_injectdbiterr => '0'
);
END bram_arch;
|
--
-- Definition of a single port ROM for KCPSM3 program defined by programm.psm
--
-- Generated by KCPSM3 Assembler 27Apr2016-08:23:29.
--
-- Standard IEEE libraries
--
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
--
-- The Unisim Library is used to define Xilinx primitives. It is also used during
-- simulation. The source can be viewed at %XILINX%\vhdl\src\unisims\unisim_VCOMP.vhd
--
library unisim;
use unisim.vcomponents.all;
--
--
entity programm is
Port ( address : in std_logic_vector(9 downto 0);
instruction : out std_logic_vector(17 downto 0);
clk : in std_logic);
end programm;
--
architecture low_level_definition of programm is
--
-- Attributes to define ROM contents during implementation synthesis.
-- The information is repeated in the generic map for functional simulation
--
attribute INIT_00 : string;
attribute INIT_01 : string;
attribute INIT_02 : string;
attribute INIT_03 : string;
attribute INIT_04 : string;
attribute INIT_05 : string;
attribute INIT_06 : string;
attribute INIT_07 : string;
attribute INIT_08 : string;
attribute INIT_09 : string;
attribute INIT_0A : string;
attribute INIT_0B : string;
attribute INIT_0C : string;
attribute INIT_0D : string;
attribute INIT_0E : string;
attribute INIT_0F : string;
attribute INIT_10 : string;
attribute INIT_11 : string;
attribute INIT_12 : string;
attribute INIT_13 : string;
attribute INIT_14 : string;
attribute INIT_15 : string;
attribute INIT_16 : string;
attribute INIT_17 : string;
attribute INIT_18 : string;
attribute INIT_19 : string;
attribute INIT_1A : string;
attribute INIT_1B : string;
attribute INIT_1C : string;
attribute INIT_1D : string;
attribute INIT_1E : string;
attribute INIT_1F : string;
attribute INIT_20 : string;
attribute INIT_21 : string;
attribute INIT_22 : string;
attribute INIT_23 : string;
attribute INIT_24 : string;
attribute INIT_25 : string;
attribute INIT_26 : string;
attribute INIT_27 : string;
attribute INIT_28 : string;
attribute INIT_29 : string;
attribute INIT_2A : string;
attribute INIT_2B : string;
attribute INIT_2C : string;
attribute INIT_2D : string;
attribute INIT_2E : string;
attribute INIT_2F : string;
attribute INIT_30 : string;
attribute INIT_31 : string;
attribute INIT_32 : string;
attribute INIT_33 : string;
attribute INIT_34 : string;
attribute INIT_35 : string;
attribute INIT_36 : string;
attribute INIT_37 : string;
attribute INIT_38 : string;
attribute INIT_39 : string;
attribute INIT_3A : string;
attribute INIT_3B : string;
attribute INIT_3C : string;
attribute INIT_3D : string;
attribute INIT_3E : string;
attribute INIT_3F : string;
attribute INITP_00 : string;
attribute INITP_01 : string;
attribute INITP_02 : string;
attribute INITP_03 : string;
attribute INITP_04 : string;
attribute INITP_05 : string;
attribute INITP_06 : string;
attribute INITP_07 : string;
--
-- Attributes to define ROM contents during implementation synthesis.
--
attribute INIT_00 of ram_1024_x_18 : label is "5C13A2008301A000C000D010A002010E010EA104410040004003C001A300A200";
attribute INIT_01 of ram_1024_x_18 : label is "C70140460708040154464000A0014001502B4402501F4401A000C000E0024000";
attribute INIT_02 of ram_1024_x_18 : label is "A001400107105446C70140460B00090807100402544640000400A00140015446";
attribute INIT_03 of ram_1024_x_18 : label is "58424B7B58404B6158424B5B58404B4158424B3A58404B305446C9010B0CDB00";
attribute INIT_04 of ram_1024_x_18 : label is "4067C6010601506145035057450250504501A000081005011AB0040040460400";
attribute INIT_05 of ram_1024_x_18 : label is "05034067505FCC0108100A0E5467C801CA0105020C0808105467C801C6010600";
attribute INIT_06 of ram_1024_x_18 : label is "00000000000000000000000000000000A000081005005467C801C60106014067";
attribute INIT_07 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_08 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_09 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_0A of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_0B of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_0C of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_0D of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_0E of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_0F of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_10 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_11 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_12 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_13 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_14 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_15 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_16 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_17 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_18 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_19 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_1A of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_1B of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_1C of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_1D of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_1E of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_1F of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_20 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_21 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_22 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_23 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_24 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_25 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_26 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_27 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_28 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_29 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_2A of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_2B of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_2C of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_2D of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_2E of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_2F of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_30 of ram_1024_x_18 : label is "00000000000000000000000000000000000000000000800100470014000D0004";
attribute INIT_31 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_32 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_33 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_34 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_35 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_36 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_37 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_38 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_39 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_3A of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_3B of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_3C of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_3D of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_3E of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INIT_3F of ram_1024_x_18 : label is "4300000000000000000000000000000000000000000000000000000000000000";
attribute INITP_00 of ram_1024_x_18 : label is "00000000000083633D2D80D8E377600CDDDDDDD803700D0370D0DDA0D68280F0";
attribute INITP_01 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INITP_02 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INITP_03 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INITP_04 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INITP_05 of ram_1024_x_18 : label is "0000000000000000000000000000000000000000000000000000000000000000";
attribute INITP_06 of ram_1024_x_18 : label is "00000000000000000000000000000000000000000000000000000000000003FF";
attribute INITP_07 of ram_1024_x_18 : label is "C000000000000000000000000000000000000000000000000000000000000000";
--
begin
--
--Instantiate the Xilinx primitive for a block RAM
ram_1024_x_18: RAMB16_S18
--synthesis translate_off
--INIT values repeated to define contents for functional simulation
generic map ( INIT_00 => X"5C13A2008301A000C000D010A002010E010EA104410040004003C001A300A200",
INIT_01 => X"C70140460708040154464000A0014001502B4402501F4401A000C000E0024000",
INIT_02 => X"A001400107105446C70140460B00090807100402544640000400A00140015446",
INIT_03 => X"58424B7B58404B6158424B5B58404B4158424B3A58404B305446C9010B0CDB00",
INIT_04 => X"4067C6010601506145035057450250504501A000081005011AB0040040460400",
INIT_05 => X"05034067505FCC0108100A0E5467C801CA0105020C0808105467C801C6010600",
INIT_06 => X"00000000000000000000000000000000A000081005005467C801C60106014067",
INIT_07 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_08 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_09 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_0A => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_0B => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_0C => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_0D => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_0E => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_0F => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_10 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_11 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_12 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_13 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_14 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_15 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_16 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_17 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_18 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_19 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_1A => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_1B => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_1C => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_1D => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_1E => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_1F => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_20 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_21 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_22 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_23 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_24 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_25 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_26 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_27 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_28 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_29 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_2A => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_2B => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_2C => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_2D => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_2E => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_2F => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_30 => X"00000000000000000000000000000000000000000000800100470014000D0004",
INIT_31 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_32 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_33 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_34 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_35 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_36 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_37 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_38 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_39 => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_3A => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_3B => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_3C => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_3D => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_3E => X"0000000000000000000000000000000000000000000000000000000000000000",
INIT_3F => X"4300000000000000000000000000000000000000000000000000000000000000",
INITP_00 => X"00000000000083633D2D80D8E377600CDDDDDDD803700D0370D0DDA0D68280F0",
INITP_01 => X"0000000000000000000000000000000000000000000000000000000000000000",
INITP_02 => X"0000000000000000000000000000000000000000000000000000000000000000",
INITP_03 => X"0000000000000000000000000000000000000000000000000000000000000000",
INITP_04 => X"0000000000000000000000000000000000000000000000000000000000000000",
INITP_05 => X"0000000000000000000000000000000000000000000000000000000000000000",
INITP_06 => X"00000000000000000000000000000000000000000000000000000000000003FF",
INITP_07 => X"C000000000000000000000000000000000000000000000000000000000000000")
--synthesis translate_on
port map( DI => "0000000000000000",
DIP => "00",
EN => '1',
WE => '0',
SSR => '0',
CLK => clk,
ADDR => address,
DO => instruction(15 downto 0),
DOP => instruction(17 downto 16));
--
end low_level_definition;
--
------------------------------------------------------------------------------------
--
-- END OF FILE programm.vhd
--
------------------------------------------------------------------------------------
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc3140.vhd,v 1.2 2001-10-26 16:29:52 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c05s02b02x00p10n01i03140ent_a IS
generic ( g1 : real := 22.0 );
END c05s02b02x00p10n01i03140ent_a;
ARCHITECTURE c05s02b02x00p10n01i03140arch_a OF c05s02b02x00p10n01i03140ent_a IS
BEGIN
TESTING: PROCESS
BEGIN
assert NOT( g1 = 22.0 )
report "***PASSED TEST: c05s02b02x00p10n01i03140"
severity NOTE;
assert ( g1 = 22.0 )
report "***FAILED TEST: c05s02b02x00p10n01i03140 - The formal generics take on implicit OPENs."
severity ERROR;
wait;
END PROCESS TESTING;
END c05s02b02x00p10n01i03140arch_a;
--
ENTITY c05s02b02x00p10n01i03140ent IS
END c05s02b02x00p10n01i03140ent;
ARCHITECTURE c05s02b02x00p10n01i03140arch OF c05s02b02x00p10n01i03140ent IS
component c05s02b02x00p10n01i03140ent_a
end component;
BEGIN
comp1 : c05s02b02x00p10n01i03140ent_a;
END c05s02b02x00p10n01i03140arch;
configuration c05s02b02x00p10n01i03140cfg of c05s02b02x00p10n01i03140ent is
for c05s02b02x00p10n01i03140arch
for comp1 : c05s02b02x00p10n01i03140ent_a use entity work.c05s02b02x00p10n01i03140ent_a(c05s02b02x00p10n01i03140arch_a);
end for;
end for;
end c05s02b02x00p10n01i03140cfg;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc3140.vhd,v 1.2 2001-10-26 16:29:52 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c05s02b02x00p10n01i03140ent_a IS
generic ( g1 : real := 22.0 );
END c05s02b02x00p10n01i03140ent_a;
ARCHITECTURE c05s02b02x00p10n01i03140arch_a OF c05s02b02x00p10n01i03140ent_a IS
BEGIN
TESTING: PROCESS
BEGIN
assert NOT( g1 = 22.0 )
report "***PASSED TEST: c05s02b02x00p10n01i03140"
severity NOTE;
assert ( g1 = 22.0 )
report "***FAILED TEST: c05s02b02x00p10n01i03140 - The formal generics take on implicit OPENs."
severity ERROR;
wait;
END PROCESS TESTING;
END c05s02b02x00p10n01i03140arch_a;
--
ENTITY c05s02b02x00p10n01i03140ent IS
END c05s02b02x00p10n01i03140ent;
ARCHITECTURE c05s02b02x00p10n01i03140arch OF c05s02b02x00p10n01i03140ent IS
component c05s02b02x00p10n01i03140ent_a
end component;
BEGIN
comp1 : c05s02b02x00p10n01i03140ent_a;
END c05s02b02x00p10n01i03140arch;
configuration c05s02b02x00p10n01i03140cfg of c05s02b02x00p10n01i03140ent is
for c05s02b02x00p10n01i03140arch
for comp1 : c05s02b02x00p10n01i03140ent_a use entity work.c05s02b02x00p10n01i03140ent_a(c05s02b02x00p10n01i03140arch_a);
end for;
end for;
end c05s02b02x00p10n01i03140cfg;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc3140.vhd,v 1.2 2001-10-26 16:29:52 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c05s02b02x00p10n01i03140ent_a IS
generic ( g1 : real := 22.0 );
END c05s02b02x00p10n01i03140ent_a;
ARCHITECTURE c05s02b02x00p10n01i03140arch_a OF c05s02b02x00p10n01i03140ent_a IS
BEGIN
TESTING: PROCESS
BEGIN
assert NOT( g1 = 22.0 )
report "***PASSED TEST: c05s02b02x00p10n01i03140"
severity NOTE;
assert ( g1 = 22.0 )
report "***FAILED TEST: c05s02b02x00p10n01i03140 - The formal generics take on implicit OPENs."
severity ERROR;
wait;
END PROCESS TESTING;
END c05s02b02x00p10n01i03140arch_a;
--
ENTITY c05s02b02x00p10n01i03140ent IS
END c05s02b02x00p10n01i03140ent;
ARCHITECTURE c05s02b02x00p10n01i03140arch OF c05s02b02x00p10n01i03140ent IS
component c05s02b02x00p10n01i03140ent_a
end component;
BEGIN
comp1 : c05s02b02x00p10n01i03140ent_a;
END c05s02b02x00p10n01i03140arch;
configuration c05s02b02x00p10n01i03140cfg of c05s02b02x00p10n01i03140ent is
for c05s02b02x00p10n01i03140arch
for comp1 : c05s02b02x00p10n01i03140ent_a use entity work.c05s02b02x00p10n01i03140ent_a(c05s02b02x00p10n01i03140arch_a);
end for;
end for;
end c05s02b02x00p10n01i03140cfg;
|
library ieee ;
use ieee.std_logic_1164.all;
use work.arch_defs.all;
use work.txt_utils.all;
entity Pipeliner is
port(
clk, rst : in std_logic;
IF_en, ID_en, EX_en, MEM_en, MEM_read, WB_en : out std_logic;
Instruction_done : out std_logic
);
end;
architecture behav of Pipeliner is
begin
process (clk, rst)
variable ticks : natural := 1;
--constant CPI : natural := 8;
begin
if rst = '1' then
ticks := 1;
elsif rising_edge(clk) then
IF_en <= '0';
ID_en <= '0';
EX_en <= '0';
MEM_en <= '0';
MEM_read <= '0';
WB_en <= '0';
Instruction_done <= '0';
case ticks is
when 2 => IF_en <= '1';
printf("===== IF ===== \n");
when 3 => ID_en <= '1';
printf("===== ID ===== \n");
when 4 => EX_en <= '1';
printf("===== EX ===== \n");
when 5 => MEM_en <= '1';
printf("===== MEM ===== \n");
when 9 => MEM_read <= '1';
when 10 => WB_en <= '1';
printf("===== WB ===== \n");
when 11 => Instruction_done <= '1'; ticks := 0;
when others => null;
end case;
--if ticks = CPI then
--ticks := 0;
--end if;
ticks := ticks + 1;
end if;
end process;
end architecture;
|
-- megafunction wizard: %RAM: 1-PORT%
-- GENERATION: STANDARD
-- VERSION: WM1.0
-- MODULE: altsyncram
-- ============================================================
-- File Name: RAM.vhd
-- Megafunction Name(s):
-- altsyncram
--
-- Simulation Library Files(s):
-- altera_mf
-- ============================================================
-- ************************************************************
-- THIS IS A WIZARD-GENERATED FILE. DO NOT EDIT THIS FILE!
--
-- 10.1 Build 153 11/29/2010 SJ Full Version
-- ************************************************************
--Copyright (C) 1991-2010 Altera Corporation
--Your use of Altera Corporation's design tools, logic functions
--and other software and tools, and its AMPP partner logic
--functions, and any output files from any of the foregoing
--(including device programming or simulation files), and any
--associated documentation or information are expressly subject
--to the terms and conditions of the Altera Program License
--Subscription Agreement, Altera MegaCore Function License
--Agreement, or other applicable license agreement, including,
--without limitation, that your use is for the sole purpose of
--programming logic devices manufactured by Altera and sold by
--Altera or its authorized distributors. Please refer to the
--applicable agreement for further details.
LIBRARY ieee;
USE ieee.std_logic_1164.all;
LIBRARY altera_mf;
USE altera_mf.all;
ENTITY RAM IS
PORT
(
address : IN STD_LOGIC_VECTOR (14 DOWNTO 0);
clock : IN STD_LOGIC := '1';
data : IN STD_LOGIC_VECTOR (15 DOWNTO 0);
wren : IN STD_LOGIC ;
q : OUT STD_LOGIC_VECTOR (15 DOWNTO 0)
);
END RAM;
ARCHITECTURE SYN OF ram IS
SIGNAL sub_wire0 : STD_LOGIC_VECTOR (15 DOWNTO 0);
COMPONENT altsyncram
GENERIC (
clock_enable_input_a : STRING;
clock_enable_output_a : STRING;
init_file : STRING;
intended_device_family : STRING;
lpm_hint : STRING;
lpm_type : STRING;
numwords_a : NATURAL;
operation_mode : STRING;
outdata_aclr_a : STRING;
outdata_reg_a : STRING;
power_up_uninitialized : STRING;
widthad_a : NATURAL;
width_a : NATURAL;
width_byteena_a : NATURAL
);
PORT (
address_a : IN STD_LOGIC_VECTOR (14 DOWNTO 0);
clock0 : IN STD_LOGIC ;
data_a : IN STD_LOGIC_VECTOR (15 DOWNTO 0);
wren_a : IN STD_LOGIC ;
q_a : OUT STD_LOGIC_VECTOR (15 DOWNTO 0)
);
END COMPONENT;
BEGIN
q <= sub_wire0(15 DOWNTO 0);
altsyncram_component : altsyncram
GENERIC MAP (
clock_enable_input_a => "BYPASS",
clock_enable_output_a => "BYPASS",
init_file => "cpuram.mif",
intended_device_family => "Cyclone II",
lpm_hint => "ENABLE_RUNTIME_MOD=NO",
lpm_type => "altsyncram",
numwords_a => 32768,
operation_mode => "SINGLE_PORT",
outdata_aclr_a => "NONE",
outdata_reg_a => "CLOCK0",
power_up_uninitialized => "FALSE",
widthad_a => 15,
width_a => 16,
width_byteena_a => 1
)
PORT MAP (
address_a => address,
clock0 => clock,
data_a => data,
wren_a => wren,
q_a => sub_wire0
);
END SYN;
-- ============================================================
-- CNX file retrieval info
-- ============================================================
-- Retrieval info: PRIVATE: ADDRESSSTALL_A NUMERIC "0"
-- Retrieval info: PRIVATE: AclrAddr NUMERIC "0"
-- Retrieval info: PRIVATE: AclrByte NUMERIC "0"
-- Retrieval info: PRIVATE: AclrData NUMERIC "0"
-- Retrieval info: PRIVATE: AclrOutput NUMERIC "0"
-- Retrieval info: PRIVATE: BYTE_ENABLE NUMERIC "0"
-- Retrieval info: PRIVATE: BYTE_SIZE NUMERIC "8"
-- Retrieval info: PRIVATE: BlankMemory NUMERIC "0"
-- Retrieval info: PRIVATE: CLOCK_ENABLE_INPUT_A NUMERIC "0"
-- Retrieval info: PRIVATE: CLOCK_ENABLE_OUTPUT_A NUMERIC "0"
-- Retrieval info: PRIVATE: Clken NUMERIC "0"
-- Retrieval info: PRIVATE: DataBusSeparated NUMERIC "1"
-- Retrieval info: PRIVATE: IMPLEMENT_IN_LES NUMERIC "0"
-- Retrieval info: PRIVATE: INIT_FILE_LAYOUT STRING "PORT_A"
-- Retrieval info: PRIVATE: INIT_TO_SIM_X NUMERIC "0"
-- Retrieval info: PRIVATE: INTENDED_DEVICE_FAMILY STRING "Cyclone II"
-- Retrieval info: PRIVATE: JTAG_ENABLED NUMERIC "0"
-- Retrieval info: PRIVATE: JTAG_ID STRING "NONE"
-- Retrieval info: PRIVATE: MAXIMUM_DEPTH NUMERIC "0"
-- Retrieval info: PRIVATE: MIFfilename STRING "cpuram.mif"
-- Retrieval info: PRIVATE: NUMWORDS_A NUMERIC "32768"
-- Retrieval info: PRIVATE: RAM_BLOCK_TYPE NUMERIC "0"
-- Retrieval info: PRIVATE: READ_DURING_WRITE_MODE_PORT_A NUMERIC "3"
-- Retrieval info: PRIVATE: RegAddr NUMERIC "1"
-- Retrieval info: PRIVATE: RegData NUMERIC "1"
-- Retrieval info: PRIVATE: RegOutput NUMERIC "1"
-- Retrieval info: PRIVATE: SYNTH_WRAPPER_GEN_POSTFIX STRING "0"
-- Retrieval info: PRIVATE: SingleClock NUMERIC "1"
-- Retrieval info: PRIVATE: UseDQRAM NUMERIC "1"
-- Retrieval info: PRIVATE: WRCONTROL_ACLR_A NUMERIC "0"
-- Retrieval info: PRIVATE: WidthAddr NUMERIC "15"
-- Retrieval info: PRIVATE: WidthData NUMERIC "16"
-- Retrieval info: PRIVATE: rden NUMERIC "0"
-- Retrieval info: LIBRARY: altera_mf altera_mf.altera_mf_components.all
-- Retrieval info: CONSTANT: CLOCK_ENABLE_INPUT_A STRING "BYPASS"
-- Retrieval info: CONSTANT: CLOCK_ENABLE_OUTPUT_A STRING "BYPASS"
-- Retrieval info: CONSTANT: INIT_FILE STRING "cpuram.mif"
-- Retrieval info: CONSTANT: INTENDED_DEVICE_FAMILY STRING "Cyclone II"
-- Retrieval info: CONSTANT: LPM_HINT STRING "ENABLE_RUNTIME_MOD=NO"
-- Retrieval info: CONSTANT: LPM_TYPE STRING "altsyncram"
-- Retrieval info: CONSTANT: NUMWORDS_A NUMERIC "32768"
-- Retrieval info: CONSTANT: OPERATION_MODE STRING "SINGLE_PORT"
-- Retrieval info: CONSTANT: OUTDATA_ACLR_A STRING "NONE"
-- Retrieval info: CONSTANT: OUTDATA_REG_A STRING "CLOCK0"
-- Retrieval info: CONSTANT: POWER_UP_UNINITIALIZED STRING "FALSE"
-- Retrieval info: CONSTANT: WIDTHAD_A NUMERIC "15"
-- Retrieval info: CONSTANT: WIDTH_A NUMERIC "16"
-- Retrieval info: CONSTANT: WIDTH_BYTEENA_A NUMERIC "1"
-- Retrieval info: USED_PORT: address 0 0 15 0 INPUT NODEFVAL "address[14..0]"
-- Retrieval info: USED_PORT: clock 0 0 0 0 INPUT VCC "clock"
-- Retrieval info: USED_PORT: data 0 0 16 0 INPUT NODEFVAL "data[15..0]"
-- Retrieval info: USED_PORT: q 0 0 16 0 OUTPUT NODEFVAL "q[15..0]"
-- Retrieval info: USED_PORT: wren 0 0 0 0 INPUT NODEFVAL "wren"
-- Retrieval info: CONNECT: @address_a 0 0 15 0 address 0 0 15 0
-- Retrieval info: CONNECT: @clock0 0 0 0 0 clock 0 0 0 0
-- Retrieval info: CONNECT: @data_a 0 0 16 0 data 0 0 16 0
-- Retrieval info: CONNECT: @wren_a 0 0 0 0 wren 0 0 0 0
-- Retrieval info: CONNECT: q 0 0 16 0 @q_a 0 0 16 0
-- Retrieval info: GEN_FILE: TYPE_NORMAL RAM.vhd TRUE
-- Retrieval info: GEN_FILE: TYPE_NORMAL RAM.inc FALSE
-- Retrieval info: GEN_FILE: TYPE_NORMAL RAM.cmp TRUE
-- Retrieval info: GEN_FILE: TYPE_NORMAL RAM.bsf TRUE
-- Retrieval info: GEN_FILE: TYPE_NORMAL RAM_inst.vhd FALSE
-- Retrieval info: LIB_FILE: altera_mf
|
-- megafunction wizard: %RAM: 1-PORT%
-- GENERATION: STANDARD
-- VERSION: WM1.0
-- MODULE: altsyncram
-- ============================================================
-- File Name: RAM.vhd
-- Megafunction Name(s):
-- altsyncram
--
-- Simulation Library Files(s):
-- altera_mf
-- ============================================================
-- ************************************************************
-- THIS IS A WIZARD-GENERATED FILE. DO NOT EDIT THIS FILE!
--
-- 10.1 Build 153 11/29/2010 SJ Full Version
-- ************************************************************
--Copyright (C) 1991-2010 Altera Corporation
--Your use of Altera Corporation's design tools, logic functions
--and other software and tools, and its AMPP partner logic
--functions, and any output files from any of the foregoing
--(including device programming or simulation files), and any
--associated documentation or information are expressly subject
--to the terms and conditions of the Altera Program License
--Subscription Agreement, Altera MegaCore Function License
--Agreement, or other applicable license agreement, including,
--without limitation, that your use is for the sole purpose of
--programming logic devices manufactured by Altera and sold by
--Altera or its authorized distributors. Please refer to the
--applicable agreement for further details.
LIBRARY ieee;
USE ieee.std_logic_1164.all;
LIBRARY altera_mf;
USE altera_mf.all;
ENTITY RAM IS
PORT
(
address : IN STD_LOGIC_VECTOR (14 DOWNTO 0);
clock : IN STD_LOGIC := '1';
data : IN STD_LOGIC_VECTOR (15 DOWNTO 0);
wren : IN STD_LOGIC ;
q : OUT STD_LOGIC_VECTOR (15 DOWNTO 0)
);
END RAM;
ARCHITECTURE SYN OF ram IS
SIGNAL sub_wire0 : STD_LOGIC_VECTOR (15 DOWNTO 0);
COMPONENT altsyncram
GENERIC (
clock_enable_input_a : STRING;
clock_enable_output_a : STRING;
init_file : STRING;
intended_device_family : STRING;
lpm_hint : STRING;
lpm_type : STRING;
numwords_a : NATURAL;
operation_mode : STRING;
outdata_aclr_a : STRING;
outdata_reg_a : STRING;
power_up_uninitialized : STRING;
widthad_a : NATURAL;
width_a : NATURAL;
width_byteena_a : NATURAL
);
PORT (
address_a : IN STD_LOGIC_VECTOR (14 DOWNTO 0);
clock0 : IN STD_LOGIC ;
data_a : IN STD_LOGIC_VECTOR (15 DOWNTO 0);
wren_a : IN STD_LOGIC ;
q_a : OUT STD_LOGIC_VECTOR (15 DOWNTO 0)
);
END COMPONENT;
BEGIN
q <= sub_wire0(15 DOWNTO 0);
altsyncram_component : altsyncram
GENERIC MAP (
clock_enable_input_a => "BYPASS",
clock_enable_output_a => "BYPASS",
init_file => "cpuram.mif",
intended_device_family => "Cyclone II",
lpm_hint => "ENABLE_RUNTIME_MOD=NO",
lpm_type => "altsyncram",
numwords_a => 32768,
operation_mode => "SINGLE_PORT",
outdata_aclr_a => "NONE",
outdata_reg_a => "CLOCK0",
power_up_uninitialized => "FALSE",
widthad_a => 15,
width_a => 16,
width_byteena_a => 1
)
PORT MAP (
address_a => address,
clock0 => clock,
data_a => data,
wren_a => wren,
q_a => sub_wire0
);
END SYN;
-- ============================================================
-- CNX file retrieval info
-- ============================================================
-- Retrieval info: PRIVATE: ADDRESSSTALL_A NUMERIC "0"
-- Retrieval info: PRIVATE: AclrAddr NUMERIC "0"
-- Retrieval info: PRIVATE: AclrByte NUMERIC "0"
-- Retrieval info: PRIVATE: AclrData NUMERIC "0"
-- Retrieval info: PRIVATE: AclrOutput NUMERIC "0"
-- Retrieval info: PRIVATE: BYTE_ENABLE NUMERIC "0"
-- Retrieval info: PRIVATE: BYTE_SIZE NUMERIC "8"
-- Retrieval info: PRIVATE: BlankMemory NUMERIC "0"
-- Retrieval info: PRIVATE: CLOCK_ENABLE_INPUT_A NUMERIC "0"
-- Retrieval info: PRIVATE: CLOCK_ENABLE_OUTPUT_A NUMERIC "0"
-- Retrieval info: PRIVATE: Clken NUMERIC "0"
-- Retrieval info: PRIVATE: DataBusSeparated NUMERIC "1"
-- Retrieval info: PRIVATE: IMPLEMENT_IN_LES NUMERIC "0"
-- Retrieval info: PRIVATE: INIT_FILE_LAYOUT STRING "PORT_A"
-- Retrieval info: PRIVATE: INIT_TO_SIM_X NUMERIC "0"
-- Retrieval info: PRIVATE: INTENDED_DEVICE_FAMILY STRING "Cyclone II"
-- Retrieval info: PRIVATE: JTAG_ENABLED NUMERIC "0"
-- Retrieval info: PRIVATE: JTAG_ID STRING "NONE"
-- Retrieval info: PRIVATE: MAXIMUM_DEPTH NUMERIC "0"
-- Retrieval info: PRIVATE: MIFfilename STRING "cpuram.mif"
-- Retrieval info: PRIVATE: NUMWORDS_A NUMERIC "32768"
-- Retrieval info: PRIVATE: RAM_BLOCK_TYPE NUMERIC "0"
-- Retrieval info: PRIVATE: READ_DURING_WRITE_MODE_PORT_A NUMERIC "3"
-- Retrieval info: PRIVATE: RegAddr NUMERIC "1"
-- Retrieval info: PRIVATE: RegData NUMERIC "1"
-- Retrieval info: PRIVATE: RegOutput NUMERIC "1"
-- Retrieval info: PRIVATE: SYNTH_WRAPPER_GEN_POSTFIX STRING "0"
-- Retrieval info: PRIVATE: SingleClock NUMERIC "1"
-- Retrieval info: PRIVATE: UseDQRAM NUMERIC "1"
-- Retrieval info: PRIVATE: WRCONTROL_ACLR_A NUMERIC "0"
-- Retrieval info: PRIVATE: WidthAddr NUMERIC "15"
-- Retrieval info: PRIVATE: WidthData NUMERIC "16"
-- Retrieval info: PRIVATE: rden NUMERIC "0"
-- Retrieval info: LIBRARY: altera_mf altera_mf.altera_mf_components.all
-- Retrieval info: CONSTANT: CLOCK_ENABLE_INPUT_A STRING "BYPASS"
-- Retrieval info: CONSTANT: CLOCK_ENABLE_OUTPUT_A STRING "BYPASS"
-- Retrieval info: CONSTANT: INIT_FILE STRING "cpuram.mif"
-- Retrieval info: CONSTANT: INTENDED_DEVICE_FAMILY STRING "Cyclone II"
-- Retrieval info: CONSTANT: LPM_HINT STRING "ENABLE_RUNTIME_MOD=NO"
-- Retrieval info: CONSTANT: LPM_TYPE STRING "altsyncram"
-- Retrieval info: CONSTANT: NUMWORDS_A NUMERIC "32768"
-- Retrieval info: CONSTANT: OPERATION_MODE STRING "SINGLE_PORT"
-- Retrieval info: CONSTANT: OUTDATA_ACLR_A STRING "NONE"
-- Retrieval info: CONSTANT: OUTDATA_REG_A STRING "CLOCK0"
-- Retrieval info: CONSTANT: POWER_UP_UNINITIALIZED STRING "FALSE"
-- Retrieval info: CONSTANT: WIDTHAD_A NUMERIC "15"
-- Retrieval info: CONSTANT: WIDTH_A NUMERIC "16"
-- Retrieval info: CONSTANT: WIDTH_BYTEENA_A NUMERIC "1"
-- Retrieval info: USED_PORT: address 0 0 15 0 INPUT NODEFVAL "address[14..0]"
-- Retrieval info: USED_PORT: clock 0 0 0 0 INPUT VCC "clock"
-- Retrieval info: USED_PORT: data 0 0 16 0 INPUT NODEFVAL "data[15..0]"
-- Retrieval info: USED_PORT: q 0 0 16 0 OUTPUT NODEFVAL "q[15..0]"
-- Retrieval info: USED_PORT: wren 0 0 0 0 INPUT NODEFVAL "wren"
-- Retrieval info: CONNECT: @address_a 0 0 15 0 address 0 0 15 0
-- Retrieval info: CONNECT: @clock0 0 0 0 0 clock 0 0 0 0
-- Retrieval info: CONNECT: @data_a 0 0 16 0 data 0 0 16 0
-- Retrieval info: CONNECT: @wren_a 0 0 0 0 wren 0 0 0 0
-- Retrieval info: CONNECT: q 0 0 16 0 @q_a 0 0 16 0
-- Retrieval info: GEN_FILE: TYPE_NORMAL RAM.vhd TRUE
-- Retrieval info: GEN_FILE: TYPE_NORMAL RAM.inc FALSE
-- Retrieval info: GEN_FILE: TYPE_NORMAL RAM.cmp TRUE
-- Retrieval info: GEN_FILE: TYPE_NORMAL RAM.bsf TRUE
-- Retrieval info: GEN_FILE: TYPE_NORMAL RAM_inst.vhd FALSE
-- Retrieval info: LIB_FILE: altera_mf
|
--------------------------------------------------------------------------------
-- MIPS I CPU --
--------------------------------------------------------------------------------
-- --
-- POSSIBLE FAULTS --
-- --
-- o The upper 4bits of a branch/jump instruction depend on the PC of the --
-- branch delay slot. This special case has not been tested: --
-- --
-- PC INSTRUCTION --
-- +------------+-----------------+ --
-- | 0x0fffffff | some branch OP | --
-- | 0x10000000 | ADD $s1, $s1, 1 | --
-- +------------+-----------------+ --
-- --
-- Whenever the upper 4 PC bits of the jump instruction differs from the --
-- delay slot instruction address, there might be a chance of incorrect --
-- behavoir. --
-- --
-- o Interrupts are still experimental. --
-- --
--------------------------------------------------------------------------------
-- Copyright (C)2011 Mathias Hörtnagl <[email protected]> --
-- --
-- This program is free software: you can redistribute it and/or modify --
-- it under the terms of the GNU General Public License as published by --
-- the Free Software Foundation, either version 3 of the License, or --
-- (at your option) any later version. --
-- --
-- This program is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the --
-- GNU General Public License for more details. --
-- --
-- You should have received a copy of the GNU General Public License --
-- along with this program. If not, see <http://www.gnu.org/licenses/>. --
--------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
library work;
use work.mips1.all;
use work.tcpu.all;
use work.icpu.all;
use work.fcpu.all;
entity cpu is
port(
ci : in cpu_in_t;
co : out cpu_out_t
);
end cpu;
architecture rtl of cpu is
signal f, fin : fe_t; -- FE: [FETCH STAGE]
signal d, din : de_t; -- DE: [DECODE STAGE]
signal e, ein : ex_t; -- EX: [EXECUTION STAGE]
signal m, min : me_t; -- ME: [MEMORY STAGE]
signal cp, cpin : cp0_t; -- Coprocessor 0 registers
-- Interrupt related signals.
signal intr_bd : boolean; -- Branch delay flag.
signal intr_bdd : boolean; -- Branch delay delay flag.
signal intr_im : std_logic_vector(7 downto 0); -- Interrupt mask.
signal intr_iec : std_logic; -- IEc: Interrupt enable current.
signal intr_iep : std_logic; -- IEp: Interrupt enable previous.
signal intr_ieo : std_logic; -- IEo: Interrupt enable old.
-- Aliases for the instruction's GPR RS and RT addresses.
alias rs_a : std_logic_vector(4 downto 0) is ci.ins(25 downto 21);
alias rt_a : std_logic_vector(4 downto 0) is ci.ins(20 downto 16);
signal rs_o, rt_o : std_logic_vector(31 downto 0); -- GPR output data.
begin
-----------------------------------------------------------------------------
-- FETCH STAGE --
-----------------------------------------------------------------------------
fe : process(f.pc, ci.irq, e.f, d.cc, cp.epc, cp.sr, intr_bd, intr_im,
intr_iec, intr_iep, intr_ieo)
--------------------------------------------------------------------------
-- EPC Address --
--------------------------------------------------------------------------
-- SETTING: Interrupt handler routine address.
constant INTR_ADR : unsigned(31 downto 0) := x"200000c0";
variable v : fe_t;
variable c : cp0_t;
variable intr : boolean;
begin
v := f;
c := cp;
-- Address of the next instruction to be fetched.
co.iadr <= std_logic_vector(f.pc) & "00";
-- Program Counter
-- if e.f.jmp = '1' then
-- v.pc := e.f.j;
-- else if d.f.jmp = '1' then
-- v.pc := d.f.j;
-- else
-- v.pc := f.pc + 1;
-- end if;
-- Program Counter
if e.f.jmp = '1' then v.pc := e.f.j; else v.pc := f.pc + 1; end if;
--------------------------------------------------------------------------
-- INTR Interrupt --
--------------------------------------------------------------------------
-- The interrupt mechanism consists of several tasks: --
-- o Push a '0' onto the IE stack to avoid further interrupt triggers. --
-- o Set the EPC to the instruction following the current instruction. --
-- o Jump to EPC_ADR, which is the hardcoded address of the interrupt --
-- dispatch routine. --
--------------------------------------------------------------------------
-- Restore from exception.
-- Do before interrupt handling, or else we might push the IE stack twice.
if d.cc.rfe then c := pop_ie(c); end if;
-- Set SR of CP0. [DE]
-- Set (Disable) SR before interrupt handling.
if d.cc.mtsr then
c.sr.im := intr_im;
c.sr.iec := intr_iec;
c.sr.iep := intr_iep;
c.sr.ieo := intr_ieo;
end if;
-- Delay interrupt if we are in one of the to delay slots.
-- Push the IE stack, Save return address and jump to the interrupt
-- handler.
intr := ( (cp.sr.im and ci.irq) /= x"00" ) and (cp.sr.iec = '1');
if (not intr_bd) and (not intr_bdd) and intr then
c := push_ie(c);
-- Save PC weather it is from a jump or just incremented.
c.epc := v.pc; -- e.f.j or f.pc + 1.
v.pc := INTR_ADR(31 downto 2);
end if;
fin <= v;
cpin <= c;
end process;
-----------------------------------------------------------------------------
-- DECODE STAGE --
-----------------------------------------------------------------------------
de : process(ci.ins, d, m, m.wc, d.cc, d.dc, d.ec, d.ec.alu, d.ec.alu.src,
d.ec.jmp, d.mc, d.mc.mem, d.wc)
variable v : de_t;
alias rgcp0 : std_logic_vector(4 downto 0) is ci.ins(15 downto 11);
begin
v := d;
-- synthesis translate_off
co.op <= op(ci.ins);
co.alu <= aluop(ci.ins);
co.rimm <= rimmop(ci.ins);
co.cp0op <= cp0op(ci.ins);
co.cp0reg <= cp0reg(ci.ins(4 downto 0));
-- synthesis translate_on
--------------------------------------------------------------------------
-- Decode --
--------------------------------------------------------------------------
-- Default values emulate a NOP [SLL $0, $0, 0] operation.
v.cc.mtsr := false; -- Move To Status Register. [INTR]
v.cc.rfe := false; -- Restore from Exception. [INTR]
--v.f.jmp := '0';
--v.f.j := (others => '-');
v.ec.wbr := RD; -- Write back register.
v.ec.alu.op := SLL0; -- ALU operation. [ALU]
v.ec.alu.src.a := REG; -- Source for ALU input A. [ALU Source Choice]
v.ec.alu.src.b := REG; -- Source for ALU input B. [ALU Source Choice]
v.ec.jmp.src := REG; -- Jump source. [Branch/Jump]
v.ec.jmp.op := NOP; -- Jump type. [Branch/Jump]
v.mc.mem.we := '0'; -- Memory write enable.
v.mc.mem.ext := ZERO; -- Memory data extension. [Data Extension]
v.mc.mem.byt := NONE; -- Number of data bytes. [MEMORY STAGE]
v.mc.src := ALU; -- ALU or MEM to GPR. [MEMORY STAGE]
v.wc.we := '0'; -- GPR write enable.
intr_bd <= false; -- Marks a branch delay slot. [INTR]
case op(ci.ins) is
when AD =>
case aluop(ci.ins) is
when JALR =>
v := link(v);
v.ec.jmp.op := JMP;
intr_bd <= true;
when JR =>
v.ec.jmp.op := JMP;
intr_bd <= true;
when SLL0 | SRA0 | SRL0 =>
v.ec.alu.op := aluop(ci.ins);
v.ec.alu.src.a := SH_CONST;
v.wc.we := '1';
when others =>
v.ec.alu.op := aluop(ci.ins);
v.wc.we := '1';
end case;
-----------------------------------------------------------------------
-- Immediate Branches --
-----------------------------------------------------------------------
when RI =>
case rimmop(ci.ins) is
when BGEZ =>
v.ec.jmp.src := BRA;
v.ec.jmp.op := GEZ;
intr_bd <= true;
when BGEZAL =>
v := link(v);
v.ec.wbr := RA;
v.ec.jmp.src := BRA;
v.ec.jmp.op := GEZ;
intr_bd <= true;
when BLTZ =>
v.ec.jmp.src := BRA;
v.ec.jmp.op := LTZ;
intr_bd <= true;
when BLTZAL =>
v := link(v);
v.ec.wbr := RA;
v.ec.jmp.src := BRA;
v.ec.jmp.op := LTZ;
intr_bd <= true;
when ERR =>
end case;
-----------------------------------------------------------------------
-- Normal Jumps/Branches --
-----------------------------------------------------------------------
when J =>
-- v.f.jmp := '1';
-- v.f.j := f.pc(31 downto 28) & unsigned(ci.ins);
v.ec.jmp.src := JMP;
v.ec.jmp.op := JMP;
intr_bd <= true;
when JAL =>
v := link(v);
v.ec.wbr := RA;
-- v.f.jmp := '1';
-- v.f.j := f.pc(31 downto 28) & unsigned(ci.ins);
v.ec.jmp.src := JMP;
v.ec.jmp.op := JMP;
intr_bd <= true;
when BEQ =>
v.ec.jmp.src := BRA;
v.ec.jmp.op := EQ;
intr_bd <= true;
when BNE =>
v.ec.jmp.src := BRA;
v.ec.jmp.op := NEQ;
intr_bd <= true;
when BLEZ =>
v.ec.jmp.src := BRA;
v.ec.jmp.op := LEZ;
intr_bd <= true;
when BGTZ =>
v.ec.jmp.src := BRA;
v.ec.jmp.op := GTZ;
intr_bd <= true;
-----------------------------------------------------------------------
-- Immediate Operations --
-----------------------------------------------------------------------
when ADDI =>
v := simm(v);
v.ec.alu.op := ADD;
when ADDIU =>
v := simm(v);
v.ec.alu.op := ADDU;
when SLTI =>
v := simm(v);
v.ec.alu.op := SLT;
when SLTIU =>
v := simm(v);
v.ec.alu.op := SLTU;
when ANDI =>
v := zimm(v);
v.ec.alu.op := AND0;
when ORI =>
v := zimm(v);
v.ec.alu.op := OR0;
when XORI =>
v := zimm(v);
v.ec.alu.op := XOR0;
when LUI =>
v := zimm(v);
v.ec.alu.src.a := SH_16;
-----------------------------------------------------------------------
-- Load And Store Data --
-----------------------------------------------------------------------
when LB =>
v := load(v);
v.mc.mem.ext := SIGN;
v.mc.mem.byt := BYTE;
when LH =>
v := load(v);
v.mc.mem.ext := SIGN;
v.mc.mem.byt := HALF;
when LW =>
v := load(v);
v.mc.mem.byt := WORD;
when LBU =>
v := load(v);
v.mc.mem.byt := BYTE;
when LHU =>
v := load(v);
v.mc.mem.byt := HALF;
when SB =>
v := store(v);
v.mc.mem.byt := BYTE;
when SH =>
v := store(v);
v.mc.mem.byt := HALF;
when SW =>
v := store(v);
v.mc.mem.byt := WORD;
-----------------------------------------------------------------------
-- Co-Processor 0 --
-----------------------------------------------------------------------
when CP0 =>
case cp0op(ci.ins) is
when MFCP0 =>
v.ec.wbr := RT;
v.ec.alu.op := MFCP0;
v.wc.we := '1';
when MTCP0 =>
v.ec.alu.op := MTCP0;
if cp0reg(rgcp0) = SR then v.cc.mtsr := true; end if;
when RFE =>
v.ec.alu.op := RFE;
v.cc.rfe := true;
when ERR =>
end case;
when ERR =>
end case;
v.i := ci.ins(25 downto 0);
v.dc.we := m.wc.we; -- Forward write enable.
v.rd := m.rd; -- Forward destination register.
v.res := m.res; -- Forward data.
din <= v;
end process;
-----------------------------------------------------------------------------
-- GPR General Purpose Registers --
-----------------------------------------------------------------------------
gp : gpr port map(
clk_i => ci.clk, -- Clock.
hld_i => ci.hld, -- Hold register data.
rs_a => rs_a, -- RS register address.
rt_a => rt_a, -- RT register address.
rd_a => m.rd, -- Write back register address.
rd_we => m.wc.we, -- Write back enable.
rd_i => m.res, -- Write back register data.
rs_o => rs_o, -- RS register data.
rt_o => rt_o -- RT register data.
);
-----------------------------------------------------------------------------
-- EXECUTION STAGE --
-----------------------------------------------------------------------------
ex : process(ci.irq, rs_o, rt_o, cp, cp.sr, f, d, d.dc, d.ec, d.ec.alu,
d.ec.alu.src, d.ec.jmp, d.mc, d.mc.mem, d.wc, e, e.f, e.mc,
e.mc.mem, e.wc, m, m.wc)
variable v : ex_t;
variable a, b : std_logic_vector(31 downto 0); -- ALU input.
variable fa, fb : std_logic_vector(31 downto 0); -- Forwarded data.
variable equ, eqz : std_logic; -- fa=fb, fa=0
variable atmp : std_logic_vector(31 downto 0); -- Temporary result.
--------------------------------------------------------------------------
-- R-Type Register --
-- +--------------------------------------------------------------+ --
-- | | rgs | rgt | rgd | smt | | --
-- +--------------------------------------------------------------+ --
-- I-Type Register --
-- +--------------------------------------------------------------+ --
-- | | imm | --
-- +--------------------------------------------------------------+ --
--------------------------------------------------------------------------
alias rgs : std_logic_vector(4 downto 0) is d.i(25 downto 21);
alias rgt : std_logic_vector(4 downto 0) is d.i(20 downto 16);
alias rgd : std_logic_vector(4 downto 0) is d.i(15 downto 11);
alias imm : std_logic_vector(15 downto 0) is d.i(15 downto 0);
alias smt : std_logic_vector(4 downto 0) is d.i(10 downto 6);
begin
v := e;
-- Choose the write back register.
case d.ec.wbr is
when RD => v.rd := rgd;
when RT => v.rd := rgt;
when RA => v.rd := b"11111";
end case;
--------------------------------------------------------------------------
-- Forwarding --
--------------------------------------------------------------------------
-- In a pipeline there can be data that has not been written into the --
-- GPR registers yet. For example see: --
-- --
-- addu $t0, $t1, $t2 -+ --
-- sll $t3, $t0, 4 -+- $t0 --
-- --
-- Here GPR $t0 is not up to date, since the instruction addu --
-- manipulates $t0, but is available after EX, so we choose the newer --
-- data from after the EX stage instead of the GPR data. --
-- However, if we load data and use it in the next instruction, we get --
-- the wrong result. Loaded data is available two cycles after the load --
-- instruction. The compiler solves this problem, since it inserts an --
-- independend instruction or a NOP operation. --
-- Other problems arise when: --
-- --
-- ori $t0, $s1, 3 -+ --
-- sw $s2, 4($sp) | --
-- subu $s2, $t0, $s3 -+- $t0 --
-- --
-- In the second example, the updated data is available after the ME --
-- stage. Up untill now we considered the situation from the viewpoint --
-- of the EX stage. --
-- --
-- andi $t0, $t0, 1 -+ --
-- lui $s1, 0xf4 | --
-- lw $s2, 0($sp) | --
-- sra $t1, $t0, 3 -+- $t0 --
-- --
-- The third example shows a problem that arrises one cycle earlier. --
-- When we read the register contents. The data to be written is --
-- present as well but not available yet. One solution might be, to --
-- prefer write before read operations. the other way suggests to store --
-- the write back data, address and write enable flag one more cycle. --
-- We can then decide in the EX stage again if the data is more recent. --
--------------------------------------------------------------------------
fa := rs_o;
fb := rt_o;
-- Forward from Write Back Stage (Data stored in DE Stage).
if (d.rd /= "00000") and (d.dc.we = '1') then
if rgs = d.rd then fa := d.res; end if;
if rgt = d.rd then fb := d.res; end if;
end if;
-- Forward from Memory Stage.
if (m.rd /= "00000") and (m.wc.we = '1') then
if rgs = m.rd then fa := m.res; end if;
if rgt = m.rd then fb := m.res; end if;
end if;
-- Forward from Execution Stage.
if (e.rd /= "00000") and (e.wc.we = '1') then
if rgs = e.rd then fa := e.res; end if;
if rgt = e.rd then fb := e.res; end if;
end if;
--------------------------------------------------------------------------
-- ALU Source Choice --
--------------------------------------------------------------------------
-- SH_CONST: Constant shift amount (SLL, SRL, SRA). --
-- SH_16: Shift 16-bit (LUI). --
-- ADD_4: Plus 4. --
-- REG: Forwarded RS register value. [Forwarding] --
--------------------------------------------------------------------------
case d.ec.alu.src.a is
when SH_CONST => a := zext(smt, 32);
when SH_16 => a := zext(b"10000", 32);
when ADD_4 => a := zext(b"00100", 32);
when REG => a := fa;
end case;
--------------------------------------------------------------------------
-- SIGN: Sign extend 16-bit immediate value according to MSB. --
-- ZERO: Zero extend 16-bit immediate value. --
-- PC: Current PC value. --
-- REG: Forwarded RT register value. [Forwarding] --
--------------------------------------------------------------------------
case d.ec.alu.src.b is
when SIGN => b := sext(imm, 32);
when ZERO => b := zext(imm, 32);
when PC => b := std_logic_vector(f.pc) & "00";
when REG => b := fb;
end case;
--------------------------------------------------------------------------
-- ALU --
--------------------------------------------------------------------------
-- IMPROVE: optimze SLT,SLTU.
intr_iec <= b(0); -- IEc: Interrupt enable current. [INTR]
intr_iep <= b(2); -- IEp: Interrupt enable previous. [INTR]
intr_ieo <= b(4); -- IEo: Interrupt enable old. [INTR]
intr_im <= b(15 downto 8); -- Interrupt mask. [INTR]
atmp := addsub(a, b, d.ec.alu.op);
v.res := (others => '0');
case d.ec.alu.op is
when ADD | ADDU |
SUB | SUBU => v.res := atmp;
when SLT => v.res := fslt(a, b);
when SLTU => v.res := fsltu(a, b);
when SLL0 | SLLV => v.res := fsll(b, a(4 downto 0));
when SRA0 | SRAV => v.res := fsra(b, a(4 downto 0));
when SRL0 | SRLV => v.res := fsrl(b, a(4 downto 0));
when AND0 => v.res := a and b;
when OR0 => v.res := a or b;
when NOR0 => v.res := a nor b;
when XOR0 => v.res := a xor b;
when JALR | JR =>
when MFCP0 =>
case cp0reg(rgd) is
when SR => v.res := get_sr(cp);
when CAUSE => v.res(15 downto 8) := ci.irq;
when EPC => v.res := std_logic_vector(cp.epc) & "00";
when ERR =>
end case;
when MTCP0 => -- MTCP0 and RFE operations are handled at the
when RFE => -- IF stage.
when ERR =>
end case;
--------------------------------------------------------------------------
-- Branch/Jump --
--------------------------------------------------------------------------
-- IMPROVE: move jump to DE stage.
if fa = fb then equ := '1'; else equ := '0'; end if;
if fa = x"00000000" then eqz := '1'; else eqz := '0'; end if;
case d.ec.jmp.op is
when NOP => v.f.jmp := '0';
when JMP => v.f.jmp := '1';
when EQ => v.f.jmp := equ;
when NEQ => v.f.jmp := not equ;
when LTZ => v.f.jmp := fa(31);
when GTZ => v.f.jmp := not (fa(31) or eqz);
when LEZ => v.f.jmp := fa(31) or eqz;
when GEZ => v.f.jmp := not fa(31);
end case;
case d.ec.jmp.src is
when REG => v.f.j := unsigned(fa(31 downto 2));
when JMP => v.f.j := f.pc(31 downto 28) & unsigned(d.i);
when BRA => v.f.j := unsigned(to_integer(f.pc) + signed(sext(imm,30)));
end case;
v.mc := d.mc;
v.wc := d.wc;
v.str := fb;
ein <= v;
end process;
-----------------------------------------------------------------------------
-- MEMORY STAGE --
-----------------------------------------------------------------------------
me : process(ci.dat, e, e.mc, e.mc.mem, e.wc, m, m.wc)
variable v : me_t;
variable dat : std_logic_vector(31 downto 0); -- Fetched memory data
begin
v := m;
co.we <= e.mc.mem.we;
co.dadr <= e.res;
co.dat <= e.str;
--------------------------------------------------------------------------
-- Address Decode --
--------------------------------------------------------------------------
-- Translate lower address bits to Wishbone Bus selection scheme. --
--------------------------------------------------------------------------
case e.mc.mem.byt is
when NONE => co.sel <= "0000";
when BYTE =>
case e.res(1 downto 0) is
when "00" => co.sel <= "1000";
when "01" => co.sel <= "0100";
when "10" => co.sel <= "0010";
when "11" => co.sel <= "0001";
when others => co.sel <= "0000";
end case;
when HALF =>
case e.res(1) is
when '0' => co.sel <= "1100";
when '1' => co.sel <= "0011";
when others => co.sel <= "0000";
end case;
when WORD => co.sel <= "1111";
end case;
--------------------------------------------------------------------------
-- Data Extension --
--------------------------------------------------------------------------
-- Fetched data can be extended with zeros or according to its MSB. --
--------------------------------------------------------------------------
case e.mc.mem.byt is
when NONE => dat := (others => '0'); -- AREA: (others => '-');
when BYTE =>
case e.mc.mem.ext is
when ZERO => dat := zext(ci.dat(7 downto 0), 32);
when SIGN => dat := sext(ci.dat(7 downto 0), 32);
end case;
when HALF =>
case e.mc.mem.ext is
when ZERO => dat := zext(ci.dat(15 downto 0), 32);
when SIGN => dat := sext(ci.dat(15 downto 0), 32);
end case;
when WORD => dat := ci.dat;
end case;
case e.mc.src is
when ALU => v.res := e.res; -- Take either the result of the ALU
when MEM => v.res := dat; -- or the loaded data from memory.
end case;
v.wc := e.wc;
v.rd := e.rd;
min <= v;
end process;
-----------------------------------------------------------------------------
-- REGISTERS --
-----------------------------------------------------------------------------
reg : process(ci.clk)
begin
if rising_edge(ci.clk) then
if ci.hld = '0' then
f <= fin; -- IF
d <= din; -- DE
e <= ein; -- EX
m <= min; -- ME
cp <= cpin; -- CP0
--------------------------------------------------------------------
-- Branch Correction --
--------------------------------------------------------------------
-- The simplest way one can think of, is to consider every branch --
-- or jump to be NOT taken and to load instructions in sequence. --
-- If we actually do jump, we already loaded an incorrect --
-- instruction in the IF stage. To anihilate the effects of this --
-- instruction, we will clear the DE stage one cycle later. --
-- [fcpu.clear(v_i : de_t)] --
--------------------------------------------------------------------
if e.f.jmp = '1' then d <= clear(d); end if;
-- Set Branch Delay Delay slot flag.
intr_bdd <= intr_bd;
end if;
-- On reset clear all relevant control signals.
if ci.rst = '1' then
f <= clear(f); -- IF
d <= clear(d); -- DE
e <= clear(e); -- EX
m <= clear(m); -- ME
cp <= clear(cp); -- CP0
end if;
end if;
end process;
end rtl; |
---------------------------------------------------------------------------------
-- Design Name : neighExtractor
-- File Name : neighExtractor.vhd
-- Function : Extracts a generic neighborhood from serial in_data
-- Coder : Kamel Eddine ABDELOUAHAB
-- Institution : Institut Pascal
---------------------------------------------------------------------------------
-- taps_data(0) taps_data(KERNEL_SIZE-1)
-- ^ ^
-- | |
-- ------- | ------- ------- | ---------------------------
-- | | | | | | | | | |
-- in_data --->| |---|--> | |-- ... -> | |---|-->| BUFFER |---> out_data
-- | | | | | | | SIZE =(TAPS_WIDTH-KERNEL)|
-- | | | | | | | |
-- ------- ------- ------- ---------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
library work;
use work.cnn_types.all;
entity taps is
generic (
PIXEL_SIZE : integer;
TAPS_WIDTH : integer;
KERNEL_SIZE : integer
);
port (
clk : in std_logic;
reset_n : in std_logic;
enable : in std_logic;
in_data : in std_logic_vector (PIXEL_SIZE-1 downto 0);
taps_data : out pixel_array (0 to KERNEL_SIZE -1 );
out_data : out std_logic_vector (PIXEL_SIZE-1 downto 0)
);
end taps;
architecture bhv of taps is
signal cell : pixel_array (0 to TAPS_WIDTH-1);
begin
process(clk)
variable i : integer := 0;
begin
if ( reset_n = '0' ) then
cell <= (others =>(others => '0'));
out_data <= (others => '0');
taps_data <= (others =>(others => '0'));
elsif (rising_edge(clk)) then
if (enable='1') then
cell(0) <= in_data;
for i in 1 to (TAPS_WIDTH-1) loop
cell(i) <= cell(i-1);
end loop;
taps_data <= cell(0 to KERNEL_SIZE-1);
out_data <= cell(TAPS_WIDTH-1);
end if;
end if;
end process;
end bhv;
|
--
-- Project: Aurora Module Generator version 2.4
--
-- Date: $Date: 2005/12/15 01:59:13 $
-- Tag: $Name: i+IP+98818 $
-- File: $RCSfile: rx_ll_vhd.ejava,v $
-- Rev: $Revision: 1.1.2.5 $
--
-- Company: Xilinx
-- Contributors: R. K. Awalt, B. L. Woodard, N. Gulstone
--
-- Disclaimer: XILINX IS PROVIDING THIS DESIGN, CODE, OR
-- INFORMATION "AS IS" SOLELY FOR USE IN DEVELOPING
-- PROGRAMS AND SOLUTIONS FOR XILINX DEVICES. BY
-- PROVIDING THIS DESIGN, CODE, OR INFORMATION AS
-- ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,
-- APPLICATION OR STANDARD, XILINX IS MAKING NO
-- REPRESENTATION THAT THIS IMPLEMENTATION IS FREE
-- FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE
-- RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY
-- REQUIRE FOR YOUR IMPLEMENTATION. XILINX
-- EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH
-- RESPECT TO THE ADEQUACY OF THE IMPLEMENTATION,
-- INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
-- REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE
-- FROM CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES
-- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-- PURPOSE.
--
-- (c) Copyright 2004 Xilinx, Inc.
-- All rights reserved.
--
--
-- RX_LL
--
-- Author: Nigel Gulstone
-- Xilinx - Embedded Networking System Engineering Group
--
-- VHDL Translation: Brian Woodard
-- Xilinx - Garden Valley Design Team
--
-- Description: The RX_LL module receives data from the Aurora Channel,
-- converts it to LocalLink and sends it to the user interface.
-- It also handles NFC and UFC messages.
--
-- This module supports 1 2-byte lane designs.
--
-- This module supports Immediate Mode Native Flow Control.
--
library IEEE;
use IEEE.STD_LOGIC_1164.all;
entity RX_LL is
port (
-- LocalLink PDU Interface
RX_D : out std_logic_vector(0 to 15);
RX_REM : out std_logic;
RX_SRC_RDY_N : out std_logic;
RX_SOF_N : out std_logic;
RX_EOF_N : out std_logic;
-- Global Logic Interface
START_RX : in std_logic;
-- Aurora Lane Interface
RX_PAD : in std_logic;
RX_PE_DATA : in std_logic_vector(0 to 15);
RX_PE_DATA_V : in std_logic;
RX_SCP : in std_logic;
RX_ECP : in std_logic;
RX_SNF : in std_logic;
RX_FC_NB : in std_logic_vector(0 to 3);
-- TX_LL Interface
DECREMENT_NFC : in std_logic;
TX_WAIT : out std_logic;
-- Error Interface
FRAME_ERROR : out std_logic;
-- System Interface
USER_CLK : in std_logic
);
end RX_LL;
architecture MAPPED of RX_LL is
-- External Register Declarations --
signal RX_D_Buffer : std_logic_vector(0 to 15);
signal RX_REM_Buffer : std_logic;
signal RX_SRC_RDY_N_Buffer : std_logic;
signal RX_SOF_N_Buffer : std_logic;
signal RX_EOF_N_Buffer : std_logic;
signal TX_WAIT_Buffer : std_logic;
signal FRAME_ERROR_Buffer : std_logic;
-- Wire Declarations --
signal start_rx_i : std_logic;
-- Component Declarations --
component RX_LL_NFC
port (
-- Aurora Lane Interface
RX_SNF : in std_logic;
RX_FC_NB : in std_logic_vector(0 to 3);
-- TX_LL Interface
DECREMENT_NFC : in std_logic;
TX_WAIT : out std_logic;
-- Global Logic Interface
CHANNEL_UP : in std_logic;
-- USER Interface
USER_CLK : in std_logic
);
end component;
component RX_LL_PDU_DATAPATH
port (
-- Traffic Separator Interface
PDU_DATA : in std_logic_vector(0 to 15);
PDU_DATA_V : in std_logic;
PDU_PAD : in std_logic;
PDU_SCP : in std_logic;
PDU_ECP : in std_logic;
-- LocalLink PDU Interface
RX_D : out std_logic_vector(0 to 15);
RX_REM : out std_logic;
RX_SRC_RDY_N : out std_logic;
RX_SOF_N : out std_logic;
RX_EOF_N : out std_logic;
-- Error Interface
FRAME_ERROR : out std_logic;
-- System Interface
USER_CLK : in std_logic;
RESET : in std_logic
);
end component;
begin
RX_D <= RX_D_Buffer;
RX_REM <= RX_REM_Buffer;
RX_SRC_RDY_N <= RX_SRC_RDY_N_Buffer;
RX_SOF_N <= RX_SOF_N_Buffer;
RX_EOF_N <= RX_EOF_N_Buffer;
TX_WAIT <= TX_WAIT_Buffer;
FRAME_ERROR <= FRAME_ERROR_Buffer;
start_rx_i <= not START_RX;
-- Main Body of Code --
-- NFC processing --
nfc_module_i : RX_LL_NFC
port map (
-- Aurora Lane Interface
RX_SNF => RX_SNF,
RX_FC_NB => RX_FC_NB,
-- TX_LL Interface
DECREMENT_NFC => DECREMENT_NFC,
TX_WAIT => TX_WAIT_Buffer,
-- Global Logic Interface
CHANNEL_UP => START_RX,
-- USER Interface
USER_CLK => USER_CLK
);
-- Datapath for user PDUs --
rx_ll_pdu_datapath_i : RX_LL_PDU_DATAPATH
port map (
-- Traffic Separator Interface
PDU_DATA => RX_PE_DATA,
PDU_DATA_V => RX_PE_DATA_V,
PDU_PAD => RX_PAD,
PDU_SCP => RX_SCP,
PDU_ECP => RX_ECP,
-- LocalLink PDU Interface
RX_D => RX_D_Buffer,
RX_REM => RX_REM_Buffer,
RX_SRC_RDY_N => RX_SRC_RDY_N_Buffer,
RX_SOF_N => RX_SOF_N_Buffer,
RX_EOF_N => RX_EOF_N_Buffer,
-- Error Interface
FRAME_ERROR => FRAME_ERROR_Buffer,
-- System Interface
USER_CLK => USER_CLK,
RESET => start_rx_i
);
end MAPPED;
|
--
-- Project: Aurora Module Generator version 2.4
--
-- Date: $Date: 2005/12/15 01:59:13 $
-- Tag: $Name: i+IP+98818 $
-- File: $RCSfile: rx_ll_vhd.ejava,v $
-- Rev: $Revision: 1.1.2.5 $
--
-- Company: Xilinx
-- Contributors: R. K. Awalt, B. L. Woodard, N. Gulstone
--
-- Disclaimer: XILINX IS PROVIDING THIS DESIGN, CODE, OR
-- INFORMATION "AS IS" SOLELY FOR USE IN DEVELOPING
-- PROGRAMS AND SOLUTIONS FOR XILINX DEVICES. BY
-- PROVIDING THIS DESIGN, CODE, OR INFORMATION AS
-- ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,
-- APPLICATION OR STANDARD, XILINX IS MAKING NO
-- REPRESENTATION THAT THIS IMPLEMENTATION IS FREE
-- FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE
-- RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY
-- REQUIRE FOR YOUR IMPLEMENTATION. XILINX
-- EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH
-- RESPECT TO THE ADEQUACY OF THE IMPLEMENTATION,
-- INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
-- REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE
-- FROM CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES
-- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-- PURPOSE.
--
-- (c) Copyright 2004 Xilinx, Inc.
-- All rights reserved.
--
--
-- RX_LL
--
-- Author: Nigel Gulstone
-- Xilinx - Embedded Networking System Engineering Group
--
-- VHDL Translation: Brian Woodard
-- Xilinx - Garden Valley Design Team
--
-- Description: The RX_LL module receives data from the Aurora Channel,
-- converts it to LocalLink and sends it to the user interface.
-- It also handles NFC and UFC messages.
--
-- This module supports 1 2-byte lane designs.
--
-- This module supports Immediate Mode Native Flow Control.
--
library IEEE;
use IEEE.STD_LOGIC_1164.all;
entity RX_LL is
port (
-- LocalLink PDU Interface
RX_D : out std_logic_vector(0 to 15);
RX_REM : out std_logic;
RX_SRC_RDY_N : out std_logic;
RX_SOF_N : out std_logic;
RX_EOF_N : out std_logic;
-- Global Logic Interface
START_RX : in std_logic;
-- Aurora Lane Interface
RX_PAD : in std_logic;
RX_PE_DATA : in std_logic_vector(0 to 15);
RX_PE_DATA_V : in std_logic;
RX_SCP : in std_logic;
RX_ECP : in std_logic;
RX_SNF : in std_logic;
RX_FC_NB : in std_logic_vector(0 to 3);
-- TX_LL Interface
DECREMENT_NFC : in std_logic;
TX_WAIT : out std_logic;
-- Error Interface
FRAME_ERROR : out std_logic;
-- System Interface
USER_CLK : in std_logic
);
end RX_LL;
architecture MAPPED of RX_LL is
-- External Register Declarations --
signal RX_D_Buffer : std_logic_vector(0 to 15);
signal RX_REM_Buffer : std_logic;
signal RX_SRC_RDY_N_Buffer : std_logic;
signal RX_SOF_N_Buffer : std_logic;
signal RX_EOF_N_Buffer : std_logic;
signal TX_WAIT_Buffer : std_logic;
signal FRAME_ERROR_Buffer : std_logic;
-- Wire Declarations --
signal start_rx_i : std_logic;
-- Component Declarations --
component RX_LL_NFC
port (
-- Aurora Lane Interface
RX_SNF : in std_logic;
RX_FC_NB : in std_logic_vector(0 to 3);
-- TX_LL Interface
DECREMENT_NFC : in std_logic;
TX_WAIT : out std_logic;
-- Global Logic Interface
CHANNEL_UP : in std_logic;
-- USER Interface
USER_CLK : in std_logic
);
end component;
component RX_LL_PDU_DATAPATH
port (
-- Traffic Separator Interface
PDU_DATA : in std_logic_vector(0 to 15);
PDU_DATA_V : in std_logic;
PDU_PAD : in std_logic;
PDU_SCP : in std_logic;
PDU_ECP : in std_logic;
-- LocalLink PDU Interface
RX_D : out std_logic_vector(0 to 15);
RX_REM : out std_logic;
RX_SRC_RDY_N : out std_logic;
RX_SOF_N : out std_logic;
RX_EOF_N : out std_logic;
-- Error Interface
FRAME_ERROR : out std_logic;
-- System Interface
USER_CLK : in std_logic;
RESET : in std_logic
);
end component;
begin
RX_D <= RX_D_Buffer;
RX_REM <= RX_REM_Buffer;
RX_SRC_RDY_N <= RX_SRC_RDY_N_Buffer;
RX_SOF_N <= RX_SOF_N_Buffer;
RX_EOF_N <= RX_EOF_N_Buffer;
TX_WAIT <= TX_WAIT_Buffer;
FRAME_ERROR <= FRAME_ERROR_Buffer;
start_rx_i <= not START_RX;
-- Main Body of Code --
-- NFC processing --
nfc_module_i : RX_LL_NFC
port map (
-- Aurora Lane Interface
RX_SNF => RX_SNF,
RX_FC_NB => RX_FC_NB,
-- TX_LL Interface
DECREMENT_NFC => DECREMENT_NFC,
TX_WAIT => TX_WAIT_Buffer,
-- Global Logic Interface
CHANNEL_UP => START_RX,
-- USER Interface
USER_CLK => USER_CLK
);
-- Datapath for user PDUs --
rx_ll_pdu_datapath_i : RX_LL_PDU_DATAPATH
port map (
-- Traffic Separator Interface
PDU_DATA => RX_PE_DATA,
PDU_DATA_V => RX_PE_DATA_V,
PDU_PAD => RX_PAD,
PDU_SCP => RX_SCP,
PDU_ECP => RX_ECP,
-- LocalLink PDU Interface
RX_D => RX_D_Buffer,
RX_REM => RX_REM_Buffer,
RX_SRC_RDY_N => RX_SRC_RDY_N_Buffer,
RX_SOF_N => RX_SOF_N_Buffer,
RX_EOF_N => RX_EOF_N_Buffer,
-- Error Interface
FRAME_ERROR => FRAME_ERROR_Buffer,
-- System Interface
USER_CLK => USER_CLK,
RESET => start_rx_i
);
end MAPPED;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc436.vhd,v 1.2 2001-10-26 16:29:54 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY model IS
PORT
(
F1: OUT integer := 3;
F2: INOUT integer := 3;
F3: IN integer
);
END model;
architecture model of model is
begin
process
begin
wait for 1 ns;
assert F3= 3
report"wrong initialization of F3 through type conversion" severity failure;
assert F2 = 3
report"wrong initialization of F2 through type conversion" severity failure;
wait;
end process;
end;
ENTITY c03s02b01x01p19n01i00436ent IS
END c03s02b01x01p19n01i00436ent;
ARCHITECTURE c03s02b01x01p19n01i00436arch OF c03s02b01x01p19n01i00436ent IS
type column is range 1 to 2;
type row is range 1 to 8;
type s2natural_cons_vector is array (row,column) of natural;
constant C1 : s2natural_cons_vector := (others => (others => 1));
function complex_scalar(s : s2natural_cons_vector) return integer is
begin
return 3;
end complex_scalar;
function scalar_complex(s : integer) return s2natural_cons_vector is
begin
return C1;
end scalar_complex;
component model1
PORT
(
F1: OUT integer;
F2: INOUT integer;
F3: IN integer
);
end component;
for T1 : model1 use entity work.model(model);
signal S1 : s2natural_cons_vector;
signal S2 : s2natural_cons_vector;
signal S3 : s2natural_cons_vector := C1;
BEGIN
T1: model1
port map (
scalar_complex(F1) => S1,
scalar_complex(F2) => complex_scalar(S2),
F3 => complex_scalar(S3)
);
TESTING: PROCESS
BEGIN
wait for 1 ns;
assert NOT((S1 = C1) and (S2 = C1))
report "***PASSED TEST: c03s02b01x01p19n01i00436"
severity NOTE;
assert ((S1 = C1) and (S2 = C1))
report "***FAILED TEST: c03s02b01x01p19n01i00436 - For an interface object of mode out, buffer, inout, or linkage, if the formal part includes a type conversion function, then the parameter subtype of that function must be a constrained array subtype."
severity ERROR;
wait;
END PROCESS TESTING;
END c03s02b01x01p19n01i00436arch;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc436.vhd,v 1.2 2001-10-26 16:29:54 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY model IS
PORT
(
F1: OUT integer := 3;
F2: INOUT integer := 3;
F3: IN integer
);
END model;
architecture model of model is
begin
process
begin
wait for 1 ns;
assert F3= 3
report"wrong initialization of F3 through type conversion" severity failure;
assert F2 = 3
report"wrong initialization of F2 through type conversion" severity failure;
wait;
end process;
end;
ENTITY c03s02b01x01p19n01i00436ent IS
END c03s02b01x01p19n01i00436ent;
ARCHITECTURE c03s02b01x01p19n01i00436arch OF c03s02b01x01p19n01i00436ent IS
type column is range 1 to 2;
type row is range 1 to 8;
type s2natural_cons_vector is array (row,column) of natural;
constant C1 : s2natural_cons_vector := (others => (others => 1));
function complex_scalar(s : s2natural_cons_vector) return integer is
begin
return 3;
end complex_scalar;
function scalar_complex(s : integer) return s2natural_cons_vector is
begin
return C1;
end scalar_complex;
component model1
PORT
(
F1: OUT integer;
F2: INOUT integer;
F3: IN integer
);
end component;
for T1 : model1 use entity work.model(model);
signal S1 : s2natural_cons_vector;
signal S2 : s2natural_cons_vector;
signal S3 : s2natural_cons_vector := C1;
BEGIN
T1: model1
port map (
scalar_complex(F1) => S1,
scalar_complex(F2) => complex_scalar(S2),
F3 => complex_scalar(S3)
);
TESTING: PROCESS
BEGIN
wait for 1 ns;
assert NOT((S1 = C1) and (S2 = C1))
report "***PASSED TEST: c03s02b01x01p19n01i00436"
severity NOTE;
assert ((S1 = C1) and (S2 = C1))
report "***FAILED TEST: c03s02b01x01p19n01i00436 - For an interface object of mode out, buffer, inout, or linkage, if the formal part includes a type conversion function, then the parameter subtype of that function must be a constrained array subtype."
severity ERROR;
wait;
END PROCESS TESTING;
END c03s02b01x01p19n01i00436arch;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc436.vhd,v 1.2 2001-10-26 16:29:54 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY model IS
PORT
(
F1: OUT integer := 3;
F2: INOUT integer := 3;
F3: IN integer
);
END model;
architecture model of model is
begin
process
begin
wait for 1 ns;
assert F3= 3
report"wrong initialization of F3 through type conversion" severity failure;
assert F2 = 3
report"wrong initialization of F2 through type conversion" severity failure;
wait;
end process;
end;
ENTITY c03s02b01x01p19n01i00436ent IS
END c03s02b01x01p19n01i00436ent;
ARCHITECTURE c03s02b01x01p19n01i00436arch OF c03s02b01x01p19n01i00436ent IS
type column is range 1 to 2;
type row is range 1 to 8;
type s2natural_cons_vector is array (row,column) of natural;
constant C1 : s2natural_cons_vector := (others => (others => 1));
function complex_scalar(s : s2natural_cons_vector) return integer is
begin
return 3;
end complex_scalar;
function scalar_complex(s : integer) return s2natural_cons_vector is
begin
return C1;
end scalar_complex;
component model1
PORT
(
F1: OUT integer;
F2: INOUT integer;
F3: IN integer
);
end component;
for T1 : model1 use entity work.model(model);
signal S1 : s2natural_cons_vector;
signal S2 : s2natural_cons_vector;
signal S3 : s2natural_cons_vector := C1;
BEGIN
T1: model1
port map (
scalar_complex(F1) => S1,
scalar_complex(F2) => complex_scalar(S2),
F3 => complex_scalar(S3)
);
TESTING: PROCESS
BEGIN
wait for 1 ns;
assert NOT((S1 = C1) and (S2 = C1))
report "***PASSED TEST: c03s02b01x01p19n01i00436"
severity NOTE;
assert ((S1 = C1) and (S2 = C1))
report "***FAILED TEST: c03s02b01x01p19n01i00436 - For an interface object of mode out, buffer, inout, or linkage, if the formal part includes a type conversion function, then the parameter subtype of that function must be a constrained array subtype."
severity ERROR;
wait;
END PROCESS TESTING;
END c03s02b01x01p19n01i00436arch;
|
entity repro2 is
generic(
BITS : positive := 4);
port(
min : in bit_vector(BITS - 1 downto 0) := "1010");
end entity;
architecture rtl of repro2 is
begin
process
variable sum : bit_vector(BITS - 2 downto 0);
variable carry : bit;
begin
(carry, sum) := min;
assert carry = '1';
assert sum = "010";
wait;
end process;
end architecture;
|
---------------------------------------------------------------------------
-- Copyright 2010 Lawrence Wilkinson [email protected]
--
-- This file is part of LJW2030, a VHDL implementation of the IBM
-- System/360 Model 30.
--
-- LJW2030 is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- LJW2030 is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with LJW2030 . If not, see <http://www.gnu.org/licenses/>.
--
---------------------------------------------------------------------------
--
-- File: FMD2030_5-01A-B.vhd
-- Creation Date:
-- Description:
-- WX register & indicators, CCROS parity check (5-01A), WX assembly (5-01B)
-- Page references like "5-01A" refer to the IBM Maintenance Diagram Manual (MDM)
-- for the 360/30 R25-5103-1
-- References like "02AE6" refer to coordinate "E6" on page "5-02A"
-- Logic references like "AB3D5" refer to card "D5" in board "B3" in gate "A"
-- Gate A is the main logic gate, B is the second (optional) logic gate,
-- C is the core storage and X is the CCROS unit
--
-- Revision History:
-- Revision 1.0 2010-07-09
-- Initial Release
-- Revision 1.1 2012-04-07
-- Changes to PA check latch
-- Use T1 rather than P1 to latch WX
---------------------------------------------------------------------------
LIBRARY ieee;
USE ieee.std_logic_1164.all;
use ieee.numeric_std.all;
LIBRARY work;
USE work.Gates_package.all;
USE work.Buses_package.all;
-- This package implements the WX register and associated logic
-- Fig 5-01A, 5-01B
entity WX_Regs is
port (
-- Indicators
W_IND_P : OUT STD_LOGIC;
X_IND_P : OUT STD_LOGIC;
WX_IND : OUT STD_LOGIC_VECTOR(0 to 12);
-- CCROS interface
WX : OUT STD_LOGIC_VECTOR(0 to 12); -- 01BA5 01BA6 to 01CC1 04BD3
CROS_STROBE : OUT STD_LOGIC; -- 01BD2 to 01CC1
CROS_GO_PULSE : OUT STD_LOGIC; -- 01BD2 to 01CC1
SALS : IN SALS_Bus; -- 01C
-- Clock inputs
T1,T2,T3,T4 : IN STD_LOGIC;
P1 : IN STD_LOGIC;
clk : IN STD_LOGIC;
-- Switch inputs
SWS_FGP,SWS_HJP : IN STD_LOGIC; -- 04CA3
SWS_F3: IN STD_LOGIC; -- 04CA3
SWS_G,SWS_H,SWS_J : IN STD_LOGIC_VECTOR(0 to 3); -- 04CA3
-- UV bus input
U_P : IN STD_LOGIC; -- 05CC3
U3_7: IN STD_LOGIC_VECTOR(3 to 7); -- 05CC3
V_P : IN STD_LOGIC; -- 05CC4
V : IN STD_LOGIC_VECTOR(0 to 7); -- 05CC4
-- Priority bus input
PRIORITY_BUS_P : IN STD_LOGIC; -- 03AE6
PRIORITY_BUS : IN STD_LOGIC_VECTOR(0 to 7); -- 03AE6
-- X6,7 inputs
X6,X7 : IN STD_LOGIC; -- 02AE6
-- Status inputs
ANY_MACH_CHK : IN STD_LOGIC; -- 07AD6
CHK_OR_DIAG_STOP_SW : IN STD_LOGIC; -- 04AE3
EARLY_ROAR_STOP : IN STD_LOGIC; -- 03CC6
MACH_START_RST : IN STD_LOGIC; -- 04AD3
ALU_CHK : IN STD_LOGIC; -- 06AE6
ALU_CHK_LCH : IN STD_LOGIC; -- 06BE6
MACH_RST_SET_LCH : IN STD_LOGIC; -- 04BB2
MACH_RST_SET_LCH_DLY : IN STD_LOGIC; -- 04BB2
USE_ALT_CU_DECODER : IN STD_LOGIC; -- 04DC2
USE_BASIC_CA_DECODER : IN STD_LOGIC; -- 02AE6
GT_UV_TO_WX_REG : IN STD_LOGIC; -- 02BA2
GT_CA_TO_W_REG : IN STD_LOGIC; -- 02BA2
GT_FWX_TO_WX_REG,GT_GWX_TO_WX_REG : IN STD_LOGIC; -- 02AE4
GT_SWS_TO_WX_PWR : IN STD_LOGIC; -- 04AD6
GT_SWS_TO_WX_LCH : IN STD_LOGIC; -- 03AB2
ANY_PRIORITY_PULSE : IN STD_LOGIC; -- 03AD6
ANY_PRIORITY_PULSE_PWR : IN STD_LOGIC; -- 03AD6
INH_ROSAR_SET : IN STD_LOGIC; -- 03CD3
CHK_SW_PROC_SW : IN STD_LOGIC; -- 04AE2
ROS_SCAN : IN STD_LOGIC; -- 03CE2
MACH_RST_2A : IN STD_LOGIC; -- 06BC6
MACH_RST_4,MACH_RST_5 : IN STD_LOGIC; -- 03DD2
N1401_MODE : IN STD_LOGIC; -- 05AD5
CARRY_0_LCHD : IN STD_LOGIC; -- 06AE3
HSMPX_TRAP : IN STD_LOGIC; -- XXXXX
SX_CHAIN_PULSE : IN STD_LOGIC; -- 03AC6
SEL_CC_ROS_REQ : IN STD_LOGIC; -- 12CA6
MPX_SHARE_PULSE : IN STD_LOGIC; -- 03AC6
ALLOW_PC_SALS : IN STD_LOGIC; -- 07AC4
TEST_LAMP : IN STD_LOGIC; -- ?????
-- Debug
DEBUG : INOUT DEBUG_BUS;
-- Outputs
SET_IND_ROSAR : OUT STD_LOGIC; --- 01AB2 to 07AB3
CTRL_REG_CHK : OUT STD_LOGIC; -- 01AD5 to 01BD1,07AC4
WX_CHK : OUT STD_LOGIC; -- 01AB5 to 07AC3
SAL_PC : OUT STD_LOGIC; -- 01AC5 to 01BD1,07AC4
GT_BU_ROSAR_TO_WX_REG : OUT STD_LOGIC; -- 01BA2 to 02AE2
SET_FW : OUT STD_LOGIC -- 01BE3 to 08CA1
);
end WX_Regs;
architecture FMD of WX_Regs is
signal SET_IND : STD_LOGIC;
signal FL_ROSAR_IND : STD_LOGIC;
signal GT_CK_TO_W_REG : STD_LOGIC;
signal sGT_BU_ROSAR_TO_WX_REG : STD_LOGIC;
signal NORMAL_ENTRY : STD_LOGIC;
signal SET_W2,SET_W2A,SET_W2B,SET_W_REG : STD_LOGIC;
signal SET_X_REG : STD_LOGIC;
signal W_P : STD_LOGIC;
signal X_P : STD_LOGIC;
signal sSET_IND_ROSAR : STD_LOGIC;
signal sWX : STD_LOGIC_VECTOR(0 to 12);
signal sINH_NORM_ENTRY : STD_LOGIC;
signal sCTRL_REG_CHK : STD_LOGIC;
signal sSAL_PC : STD_LOGIC;
signal PA_LCH : STD_LOGIC;
-- WX display
signal WX_IND_X : STD_LOGIC_VECTOR(0 to 12);
signal W_IND_P_X, X_IND_P_X : STD_LOGIC;
-- New WX value
signal W_ASSM : STD_LOGIC_VECTOR(3 to 8); -- 8 is P
signal X_ASSM : STD_LOGIC_VECTOR(0 to 8); -- 8 is P
-- Multiplexor backup ROSAR
signal FWX : STD_LOGIC_VECTOR(0 to 12);
alias FW : STD_LOGIC_VECTOR(3 to 7) is FWX(0 to 4);
alias FX : STD_LOGIC_VECTOR(0 to 7) is FWX(5 to 12);
signal FW_P : STD_LOGIC;
signal FX_P : STD_LOGIC;
signal SET_F : STD_LOGIC;
-- Selector backup ROSAR
signal GWX : STD_LOGIC_VECTOR(0 to 12);
alias GW : STD_LOGIC_VECTOR(3 to 7) is GWX(0 to 4);
alias GX : STD_LOGIC_VECTOR(0 to 7) is GWX(5 to 12);
signal GW_P : STD_LOGIC;
signal GX_P : STD_LOGIC;
signal SET_G : STD_LOGIC;
signal ROSAR_IND_LATCH_Set : STD_LOGIC;
signal PRIORITY_PARITY : STD_LOGIC;
BEGIN
-- Fig 5-01A
-- ROS Indicator register
ROSAR_IND_LATCH_Set <= (ANY_MACH_CHK and CHK_OR_DIAG_STOP_SW) or EARLY_ROAR_STOP;
ROSAR_IND_LATCH: entity work.FLL port map(ROSAR_IND_LATCH_Set,MACH_START_RST,FL_ROSAR_IND); -- AA3G4,AA3H4
sSET_IND_ROSAR <= (not ALU_CHK or not CHK_OR_DIAG_STOP_SW) and not FL_ROSAR_IND; -- AA3H4
-- sSET_IND_ROSAR <= '1'; -- Debug
SET_IND_ROSAR <= sSET_IND_ROSAR;
SET_IND <= (T4 and sSET_IND_ROSAR) or MACH_RST_SET_LCH; -- AA3J4
WINDP: entity work.PH port map(W_P,SET_IND,W_IND_P_X); -- AA3J2
W_IND_P <= W_IND_P_X or TEST_LAMP;
XINDP: entity work.PH port map(X_P,SET_IND,X_IND_P_X); -- AA3J3
X_IND_P <= X_IND_P_X or TEST_LAMP;
WXIND: entity work.PHV13 port map(sWX,SET_IND,WX_IND_X); -- AA3J2,AA3J3
WX_IND <= WX_IND_X or (WX_IND'range=>TEST_LAMP);
-- SALS parity checking
-- ?? I have added a latch (FL) on PA to hold it at T4, as are W_IND_P and X_IND_P
-- This keeps WX_CHK valid during T1, T2 and T3 - it is checked during T2 of the following cycle
-- Without this, spurious ROS_ADDR checks are generated because PA is not always valid at the next T2
PA_PH: entity work.PH port map(SALS.SALS_PA,T4,PA_LCH);
WX_CHK <= not(PA_LCH xor W_IND_P_X xor X_IND_P_X); -- AA2J4 ?? Inverted ??
sSAL_PC <= not EvenParity(USE_BASIC_CA_DECODER & SALS.SALS_AK & SALS.SALS_PK & SALS.SALS_CH & SALS.SALS_CL &
SALS.SALS_CM & SALS.SALS_CU & SALS.SALS_CA & SALS.SALS_CB & SALS.SALS_CK & SALS.SALS_PA & SALS.SALS_PS)
or
EvenParity(SALS.SALS_PN & SALS.SALS_CN);
SAL_PC <= sSAL_PC;
sCTRL_REG_CHK <= EvenParity(SALS.SALS_CD & SALS.SALS_SA & SALS.SALS_CS & SALS.SALS_CV & SALS.SALS_CC & SALS.SALS_CF & SALS.SALS_CG & SALS.SALS_PC);
CTRL_REG_CHK <= sCTRL_REG_CHK;
-- Fig 5-01B
-- W Reg assembly
PRIORITY_PARITY <= not N1401_MODE and not GT_SWS_TO_WX_LCH;
W_ASSM <= (
mux(GT_GWX_TO_WX_REG, GW & GW_P) or -- AA2G2
-- mux(ANY_PRIORITY_PULSE_PWR, (N1401_MODE & ROS_SCAN & '0' & (not GT_SWS_TO_WX_LCH and not N1401_MODE) & '0' & ROS_SCAN)) or -- AA2J2,AA2E3 ?? Sets W6 on restart ??
mux(ANY_PRIORITY_PULSE_PWR, (N1401_MODE & '0' & '0' & ROS_SCAN & ROS_SCAN & PRIORITY_PARITY)) or -- AA2J2,AA2E3 ?? See above for original version
mux(MACH_RST_2A,"00000" & not GT_SWS_TO_WX_LCH) or -- AA2F2,AA2E7 ?? See above
mux(GT_SWS_TO_WX_PWR, (SWS_F3 & SWS_G & SWS_FGP)) or -- AA2J2,AA2F2,AA2E3,AA2E2
mux(GT_UV_TO_WX_REG, U3_7 & U_P) or -- AA2J2,AA2F2,AA2E3,AA2E2
mux(GT_CK_TO_W_REG, (N1401_MODE & SALS.SALS_CK & SALS.SALS_PK)) or -- AA2J2,AA2F2,AA2E3,AA2E2
mux(GT_CA_TO_W_REG, (SALS.SALS_AA & SALS.SALS_CA & SALS.SALS_PK)) or -- AA2H2,AA2J2,AA2F2
mux(GT_FWX_TO_WX_REG, FW & FW_P)); -- AA2H2,AA2J2,AA2F2
-- X Reg assembly
sINH_NORM_ENTRY <= '1' when SALS.SALS_CK="0101" and SALS.SALS_AK='1' and CARRY_0_LCHD='1' else '0'; -- AB3H7,AA2F5 CK=0101 AK=1 ACFORCE
X_ASSM <= (
mux(GT_FWX_TO_WX_REG, FX & FX_P) or -- AA2G3
mux(ANY_PRIORITY_PULSE_PWR, PRIORITY_BUS & PRIORITY_BUS_P) or -- AA2G3
mux(GT_GWX_TO_WX_REG, GX & GX_P) or -- AA2G3
mux(GT_SWS_TO_WX_PWR, SWS_H & SWS_J & SWS_HJP) or -- AA2F3
mux(GT_UV_TO_WX_REG, V & V_P) or -- AA2F3
mux(NORMAL_ENTRY and not sINH_NORM_ENTRY, (SALS.SALS_CN & X6 & X7 & (SALS.SALS_PN xor X6 xor X7))) or -- AA2F3
mux(sINH_NORM_ENTRY, "000000001") or -- AA2H5 XP=1 for ACFORCE
mux(ANY_PRIORITY_PULSE_PWR and SEL_CC_ROS_REQ and SX_CHAIN_PULSE, "000000110") or -- AA2H3
mux(HSMPX_TRAP and SX_CHAIN_PULSE, "000001001") -- AA2E7
);
-- WX Reg loading
GT_CK_TO_W_REG <= '1' when USE_ALT_CU_DECODER='1' and SALS.SALS_CU="10" else '0'; -- AB3D6
sGT_BU_ROSAR_TO_WX_REG <= '1' when USE_ALT_CU_DECODER='1' and SALS.SALS_CU="11" else '0'; -- AB3D6
GT_BU_ROSAR_TO_WX_REG <= sGT_BU_ROSAR_TO_WX_REG;
NORMAL_ENTRY <= not sGT_BU_ROSAR_TO_WX_REG and not GT_UV_TO_WX_REG and not ANY_PRIORITY_PULSE; -- AA2C7
-- W_LATCH:
SET_W2A <= not ANY_PRIORITY_PULSE_PWR or not ALU_CHK_LCH or not CHK_SW_PROC_SW; -- AA2H5 ?? What does this do?
-- SET_W2A <= '1';
SET_W2B <= sGT_BU_ROSAR_TO_WX_REG or not NORMAL_ENTRY; -- AA2F2
SET_W2 <= SET_W2A and SET_W2B; -- AA2H5,AA2F2 Wired-AND
SET_W_REG <= ((GT_CA_TO_W_REG or GT_CK_TO_W_REG or SET_W2) and T1) or MACH_RST_SET_LCH_DLY; -- AA2D2 ?? P1 or T1 ??
REG_W: entity work.PHV5 port map(W_ASSM(3 to 7),SET_W_REG,sWX(0 to 4)); -- AA2D2
REG_WP: entity work.PH port map(W_ASSM(8),SET_W_REG,W_P); -- AA2D2
-- X_LATCH:
SET_X_REG <= (not INH_ROSAR_SET and T1) or MACH_RST_SET_LCH_DLY; -- AA2D2 ?? P1 or T1 ??
REG_X: entity work.PHV8 port map(X_ASSM(0 to 7),SET_X_REG,sWX(5 to 12)); -- AA2D3
REG_XP: entity work.PH port map(X_ASSM(8),SET_X_REG,X_P); -- AA2D3
WX <= sWX;
-- Backup ROSAR regs
SET_F <= (MPX_SHARE_PULSE and T4) or MACH_RST_4; -- AA3G3
SET_FW <= SET_F;
FWX_LCH: entity work.PHV13 port map(sWX,SET_F,FWX); -- AA3H2,AA3H3
FWP_LCH: entity work.PH port map(W_P,SET_F,FW_P); -- AA3H2
FXP_LCH: entity work.PH port map(X_P,SET_F,FX_P); -- AA3H3
SET_G <= (SX_CHAIN_PULSE and T4) or MACH_RST_5; -- AA3K2
GWX_LCH: entity work.PHV13 port map(sWX,SET_G,GWX); -- AA2K5,AA2L2
GWP_LCH: entity work.PH port map(W_P,SET_G,GW_P); -- AA2K5
GXP_LCH: entity work.PH port map(X_P,SET_G,GX_P); -- AA2L2
-- CROS triggering
-- This is what the ALD shows:
-- CROS_GO_PULSE <= not (T2 and CHK_OR_DIAG_STOP_SW and ALLOW_PC_SALS and (sSAL_PC or sCTRL_REG_CHK)); -- AA2E7,AA2E2,AA2C2
-- This is what I think it should be
CROS_GO_PULSE <= T2 and not (CHK_OR_DIAG_STOP_SW and ALLOW_PC_SALS and (sSAL_PC or sCTRL_REG_CHK)); -- AA2E7,AA2E2,AA2C2 ??
CROS_STROBE <= T3; -- AA3L6
with DEBUG.SELECTION select
DEBUG.PROBE <=
FWX(0) when 0,
FWX(1) when 1,
FWX(2) when 2,
FWX(3) when 3,
FWX(4) when 4,
FWX(5) when 5,
FWX(6) when 6,
FWX(7) when 7,
FWX(8) when 8,
FWX(9) when 9,
FWX(10) when 10,
FWX(11) when 11,
FWX(12) when 12,
FW_P when 13,
FX_P when 14,
MPX_SHARE_PULSE when 15;
end FMD;
|
-- ----------------------------------------------------------------------------
-- Entity for implementation of Clark Strided NFA
-- ----------------------------------------------------------------------------
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
use IEEE.std_logic_arith.all;
-- ----------------------------------------------------------------------------
-- Entity declaration
-- ----------------------------------------------------------------------------
entity CLARK_STRIDED_NFA is
generic(
DATA_WIDTH : integer := %$%;
RULES : integer := %$%
);
port(
CLK : in std_logic;
RESET : in std_logic;
-- input data interface
DATA : in std_logic_vector(DATA_WIDTH - 1 downto 0);
SOF : in std_logic;
EOF : in std_logic;
SRC_RDY : in std_logic;
DST_RDY : out std_logic;
-- output data interface
BITMAP : out std_logic_vector(RULES - 1 downto 0);
VLD : out std_logic;
ACK : in std_logic
);
end entity CLARK_STRIDED_NFA;
-- ----------------------------------------------------------------------------
-- Architecture: full
-- ----------------------------------------------------------------------------
architecture full of CLARK_STRIDED_NFA is
signal local_reset : std_logic;
signal local_reset_fsm : std_logic;
signal we : std_logic;
-- signal rdy : std_logic;
-- signal vld_internal : std_logic;
-- signal set : std_logic;
%$%
begin
local_reset <= RESET or local_reset_fsm;
ctrl_fsm: entity work.CONTROL_FSM
port map(
CLK => CLK,
RESET => RESET,
-- input interface
EOF => EOF,
SRC_RDY => SRC_RDY,
DST_RDY => DST_RDY,
-- output interface
WE => we,
LOCAL_RESET => local_reset_fsm,
-- inner interface
VLD => VLD,
ACK => ACK
);
-- local_reset <= RESET or ACK;
-- we <= SRC_RDY and rdy;
-- DST_RDY <= rdy;
-- VLD <= vld_internal;
-- set <= SRC_RDY and EOF and rdy;
-- rdy <= not vld_internal;
--
-- end_reg: process(CLK)
-- begin
-- if (CLK'event and CLK = '1') then
-- if (local_reset = '1') then
-- vld_internal <= '0';
-- else
-- if set = '1' then
-- vld_internal <= '1';
-- end if;
-- end if;
-- end if;
-- end process end_reg;
%$%
final_bitmap_u: entity work.FINAL_BITMAP
generic map(
DATA_WIDTH => RULES
)
port map(
CLK => CLK,
RESET => local_reset,
-- input data interface
SET => bitmap_in,
-- output data interface
BITMAP => BITMAP
);
end architecture full;
|
-- ----------------------------------------------------------------------------
-- Entity for conversion from one hot encoding to binary state encoding
-- ----------------------------------------------------------------------------
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_unsigned.all;
use IEEE.std_logic_arith.all;
-- ----------------------------------------------------------------------------
-- Entity declaration
-- ----------------------------------------------------------------------------
entity ENCODER%$% is
generic(
INPUT_DATA_WIDTH : integer := %$%;
OUTPUT_DATA_WIDTH : integer := %$%
);
port(
-- input data interface
INPUT : in std_logic_vector(INPUT_DATA_WIDTH - 1 downto 0);
-- output data interface
OUTPUT : out std_logic_vector(OUTPUT_DATA_WIDTH - 1 downto 0);
VLD : out std_logic
);
end entity ENCODER%$%;
-- ----------------------------------------------------------------------------
-- Architecture: full
-- ----------------------------------------------------------------------------
architecture full of ENCODER%$% is
signal bin : std_logic_vector(OUTPUT_DATA_WIDTH - 1 downto 0);
begin
%$%
OUTPUT <= bin;
generic_or: process(INPUT)
begin
if (INPUT = conv_std_logic_vector(0, INPUT_DATA_WIDTH)) then
VLD <= '0';
else
VLD <= '1';
end if;
end process generic_or;
end architecture full; |
-- (c) Copyright 1995-2016 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
-- liability) for any loss or damage of any kind or nature
-- related to, arising under or in connection with these
-- materials, including for any direct, or any indirect,
-- special, incidental, or consequential loss or damage
-- (including loss of data, profits, goodwill, or any type of
-- loss or damage suffered as a result of any action brought
-- by a third party) even if such damage or loss was
-- reasonably foreseeable or Xilinx had been advised of the
-- possibility of the same.
--
-- CRITICAL APPLICATIONS
-- Xilinx products are not designed or intended to be fail-
-- safe, or for use in any application requiring fail-safe
-- performance, such as life-support or safety devices or
-- systems, Class III medical devices, nuclear facilities,
-- applications related to the deployment of airbags, or any
-- other applications that could lead to death, personal
-- injury, or severe property or environmental damage
-- (individually and collectively, "Critical
-- Applications"). Customer assumes the sole risk and
-- liability of any use of Xilinx products in Critical
-- Applications, subject only to applicable laws and
-- regulations governing limitations on product liability.
--
-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
-- PART OF THIS FILE AT ALL TIMES.
--
-- DO NOT MODIFY THIS FILE.
-- IP VLNV: xilinx.com:ip:blk_mem_gen:8.3
-- IP Revision: 1
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
USE ieee.numeric_std.ALL;
LIBRARY blk_mem_gen_v8_3_1;
USE blk_mem_gen_v8_3_1.blk_mem_gen_v8_3_1;
ENTITY FrameBuffer IS
PORT (
clka : IN STD_LOGIC;
ena : IN STD_LOGIC;
wea : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
addra : IN STD_LOGIC_VECTOR(13 DOWNTO 0);
dina : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
douta : OUT STD_LOGIC_VECTOR(7 DOWNTO 0);
clkb : IN STD_LOGIC;
web : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
addrb : IN STD_LOGIC_VECTOR(13 DOWNTO 0);
dinb : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
doutb : OUT STD_LOGIC_VECTOR(7 DOWNTO 0)
);
END FrameBuffer;
ARCHITECTURE FrameBuffer_arch OF FrameBuffer IS
ATTRIBUTE DowngradeIPIdentifiedWarnings : string;
ATTRIBUTE DowngradeIPIdentifiedWarnings OF FrameBuffer_arch: ARCHITECTURE IS "yes";
COMPONENT blk_mem_gen_v8_3_1 IS
GENERIC (
C_FAMILY : STRING;
C_XDEVICEFAMILY : STRING;
C_ELABORATION_DIR : STRING;
C_INTERFACE_TYPE : INTEGER;
C_AXI_TYPE : INTEGER;
C_AXI_SLAVE_TYPE : INTEGER;
C_USE_BRAM_BLOCK : INTEGER;
C_ENABLE_32BIT_ADDRESS : INTEGER;
C_CTRL_ECC_ALGO : STRING;
C_HAS_AXI_ID : INTEGER;
C_AXI_ID_WIDTH : INTEGER;
C_MEM_TYPE : INTEGER;
C_BYTE_SIZE : INTEGER;
C_ALGORITHM : INTEGER;
C_PRIM_TYPE : INTEGER;
C_LOAD_INIT_FILE : INTEGER;
C_INIT_FILE_NAME : STRING;
C_INIT_FILE : STRING;
C_USE_DEFAULT_DATA : INTEGER;
C_DEFAULT_DATA : STRING;
C_HAS_RSTA : INTEGER;
C_RST_PRIORITY_A : STRING;
C_RSTRAM_A : INTEGER;
C_INITA_VAL : STRING;
C_HAS_ENA : INTEGER;
C_HAS_REGCEA : INTEGER;
C_USE_BYTE_WEA : INTEGER;
C_WEA_WIDTH : INTEGER;
C_WRITE_MODE_A : STRING;
C_WRITE_WIDTH_A : INTEGER;
C_READ_WIDTH_A : INTEGER;
C_WRITE_DEPTH_A : INTEGER;
C_READ_DEPTH_A : INTEGER;
C_ADDRA_WIDTH : INTEGER;
C_HAS_RSTB : INTEGER;
C_RST_PRIORITY_B : STRING;
C_RSTRAM_B : INTEGER;
C_INITB_VAL : STRING;
C_HAS_ENB : INTEGER;
C_HAS_REGCEB : INTEGER;
C_USE_BYTE_WEB : INTEGER;
C_WEB_WIDTH : INTEGER;
C_WRITE_MODE_B : STRING;
C_WRITE_WIDTH_B : INTEGER;
C_READ_WIDTH_B : INTEGER;
C_WRITE_DEPTH_B : INTEGER;
C_READ_DEPTH_B : INTEGER;
C_ADDRB_WIDTH : INTEGER;
C_HAS_MEM_OUTPUT_REGS_A : INTEGER;
C_HAS_MEM_OUTPUT_REGS_B : INTEGER;
C_HAS_MUX_OUTPUT_REGS_A : INTEGER;
C_HAS_MUX_OUTPUT_REGS_B : INTEGER;
C_MUX_PIPELINE_STAGES : INTEGER;
C_HAS_SOFTECC_INPUT_REGS_A : INTEGER;
C_HAS_SOFTECC_OUTPUT_REGS_B : INTEGER;
C_USE_SOFTECC : INTEGER;
C_USE_ECC : INTEGER;
C_EN_ECC_PIPE : INTEGER;
C_HAS_INJECTERR : INTEGER;
C_SIM_COLLISION_CHECK : STRING;
C_COMMON_CLK : INTEGER;
C_DISABLE_WARN_BHV_COLL : INTEGER;
C_EN_SLEEP_PIN : INTEGER;
C_USE_URAM : INTEGER;
C_EN_RDADDRA_CHG : INTEGER;
C_EN_RDADDRB_CHG : INTEGER;
C_EN_DEEPSLEEP_PIN : INTEGER;
C_EN_SHUTDOWN_PIN : INTEGER;
C_EN_SAFETY_CKT : INTEGER;
C_DISABLE_WARN_BHV_RANGE : INTEGER;
C_COUNT_36K_BRAM : STRING;
C_COUNT_18K_BRAM : STRING;
C_EST_POWER_SUMMARY : STRING
);
PORT (
clka : IN STD_LOGIC;
rsta : IN STD_LOGIC;
ena : IN STD_LOGIC;
regcea : IN STD_LOGIC;
wea : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
addra : IN STD_LOGIC_VECTOR(13 DOWNTO 0);
dina : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
douta : OUT STD_LOGIC_VECTOR(7 DOWNTO 0);
clkb : IN STD_LOGIC;
rstb : IN STD_LOGIC;
enb : IN STD_LOGIC;
regceb : IN STD_LOGIC;
web : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
addrb : IN STD_LOGIC_VECTOR(13 DOWNTO 0);
dinb : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
doutb : OUT STD_LOGIC_VECTOR(7 DOWNTO 0);
injectsbiterr : IN STD_LOGIC;
injectdbiterr : IN STD_LOGIC;
eccpipece : IN STD_LOGIC;
sbiterr : OUT STD_LOGIC;
dbiterr : OUT STD_LOGIC;
rdaddrecc : OUT STD_LOGIC_VECTOR(13 DOWNTO 0);
sleep : IN STD_LOGIC;
deepsleep : IN STD_LOGIC;
shutdown : IN STD_LOGIC;
rsta_busy : OUT STD_LOGIC;
rstb_busy : OUT STD_LOGIC;
s_aclk : IN STD_LOGIC;
s_aresetn : IN STD_LOGIC;
s_axi_awid : IN STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_awaddr : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
s_axi_awlen : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
s_axi_awsize : IN STD_LOGIC_VECTOR(2 DOWNTO 0);
s_axi_awburst : IN STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_awvalid : IN STD_LOGIC;
s_axi_awready : OUT STD_LOGIC;
s_axi_wdata : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
s_axi_wstrb : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
s_axi_wlast : IN STD_LOGIC;
s_axi_wvalid : IN STD_LOGIC;
s_axi_wready : OUT STD_LOGIC;
s_axi_bid : OUT STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_bresp : OUT STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_bvalid : OUT STD_LOGIC;
s_axi_bready : IN STD_LOGIC;
s_axi_arid : IN STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_araddr : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
s_axi_arlen : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
s_axi_arsize : IN STD_LOGIC_VECTOR(2 DOWNTO 0);
s_axi_arburst : IN STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_arvalid : IN STD_LOGIC;
s_axi_arready : OUT STD_LOGIC;
s_axi_rid : OUT STD_LOGIC_VECTOR(3 DOWNTO 0);
s_axi_rdata : OUT STD_LOGIC_VECTOR(7 DOWNTO 0);
s_axi_rresp : OUT STD_LOGIC_VECTOR(1 DOWNTO 0);
s_axi_rlast : OUT STD_LOGIC;
s_axi_rvalid : OUT STD_LOGIC;
s_axi_rready : IN STD_LOGIC;
s_axi_injectsbiterr : IN STD_LOGIC;
s_axi_injectdbiterr : IN STD_LOGIC;
s_axi_sbiterr : OUT STD_LOGIC;
s_axi_dbiterr : OUT STD_LOGIC;
s_axi_rdaddrecc : OUT STD_LOGIC_VECTOR(13 DOWNTO 0)
);
END COMPONENT blk_mem_gen_v8_3_1;
ATTRIBUTE X_INTERFACE_INFO : STRING;
ATTRIBUTE X_INTERFACE_INFO OF clka: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA CLK";
ATTRIBUTE X_INTERFACE_INFO OF ena: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA EN";
ATTRIBUTE X_INTERFACE_INFO OF wea: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA WE";
ATTRIBUTE X_INTERFACE_INFO OF addra: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA ADDR";
ATTRIBUTE X_INTERFACE_INFO OF dina: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA DIN";
ATTRIBUTE X_INTERFACE_INFO OF douta: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTA DOUT";
ATTRIBUTE X_INTERFACE_INFO OF clkb: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB CLK";
ATTRIBUTE X_INTERFACE_INFO OF web: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB WE";
ATTRIBUTE X_INTERFACE_INFO OF addrb: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB ADDR";
ATTRIBUTE X_INTERFACE_INFO OF dinb: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB DIN";
ATTRIBUTE X_INTERFACE_INFO OF doutb: SIGNAL IS "xilinx.com:interface:bram:1.0 BRAM_PORTB DOUT";
BEGIN
U0 : blk_mem_gen_v8_3_1
GENERIC MAP (
C_FAMILY => "artix7",
C_XDEVICEFAMILY => "artix7",
C_ELABORATION_DIR => "./",
C_INTERFACE_TYPE => 0,
C_AXI_TYPE => 1,
C_AXI_SLAVE_TYPE => 0,
C_USE_BRAM_BLOCK => 0,
C_ENABLE_32BIT_ADDRESS => 0,
C_CTRL_ECC_ALGO => "NONE",
C_HAS_AXI_ID => 0,
C_AXI_ID_WIDTH => 4,
C_MEM_TYPE => 2,
C_BYTE_SIZE => 8,
C_ALGORITHM => 1,
C_PRIM_TYPE => 1,
C_LOAD_INIT_FILE => 1,
C_INIT_FILE_NAME => "FrameBuffer.mif",
C_INIT_FILE => "FrameBuffer.mem",
C_USE_DEFAULT_DATA => 0,
C_DEFAULT_DATA => "0",
C_HAS_RSTA => 0,
C_RST_PRIORITY_A => "CE",
C_RSTRAM_A => 0,
C_INITA_VAL => "0",
C_HAS_ENA => 1,
C_HAS_REGCEA => 0,
C_USE_BYTE_WEA => 1,
C_WEA_WIDTH => 1,
C_WRITE_MODE_A => "WRITE_FIRST",
C_WRITE_WIDTH_A => 8,
C_READ_WIDTH_A => 8,
C_WRITE_DEPTH_A => 10240,
C_READ_DEPTH_A => 10240,
C_ADDRA_WIDTH => 14,
C_HAS_RSTB => 0,
C_RST_PRIORITY_B => "CE",
C_RSTRAM_B => 0,
C_INITB_VAL => "0",
C_HAS_ENB => 0,
C_HAS_REGCEB => 0,
C_USE_BYTE_WEB => 1,
C_WEB_WIDTH => 1,
C_WRITE_MODE_B => "WRITE_FIRST",
C_WRITE_WIDTH_B => 8,
C_READ_WIDTH_B => 8,
C_WRITE_DEPTH_B => 10240,
C_READ_DEPTH_B => 10240,
C_ADDRB_WIDTH => 14,
C_HAS_MEM_OUTPUT_REGS_A => 0,
C_HAS_MEM_OUTPUT_REGS_B => 1,
C_HAS_MUX_OUTPUT_REGS_A => 0,
C_HAS_MUX_OUTPUT_REGS_B => 0,
C_MUX_PIPELINE_STAGES => 0,
C_HAS_SOFTECC_INPUT_REGS_A => 0,
C_HAS_SOFTECC_OUTPUT_REGS_B => 0,
C_USE_SOFTECC => 0,
C_USE_ECC => 0,
C_EN_ECC_PIPE => 0,
C_HAS_INJECTERR => 0,
C_SIM_COLLISION_CHECK => "ALL",
C_COMMON_CLK => 0,
C_DISABLE_WARN_BHV_COLL => 0,
C_EN_SLEEP_PIN => 0,
C_USE_URAM => 0,
C_EN_RDADDRA_CHG => 0,
C_EN_RDADDRB_CHG => 0,
C_EN_DEEPSLEEP_PIN => 0,
C_EN_SHUTDOWN_PIN => 0,
C_EN_SAFETY_CKT => 0,
C_DISABLE_WARN_BHV_RANGE => 0,
C_COUNT_36K_BRAM => "2",
C_COUNT_18K_BRAM => "1",
C_EST_POWER_SUMMARY => "Estimated Power for IP : 4.61856 mW"
)
PORT MAP (
clka => clka,
rsta => '0',
ena => ena,
regcea => '0',
wea => wea,
addra => addra,
dina => dina,
douta => douta,
clkb => clkb,
rstb => '0',
enb => '0',
regceb => '0',
web => web,
addrb => addrb,
dinb => dinb,
doutb => doutb,
injectsbiterr => '0',
injectdbiterr => '0',
eccpipece => '0',
sleep => '0',
deepsleep => '0',
shutdown => '0',
s_aclk => '0',
s_aresetn => '0',
s_axi_awid => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 4)),
s_axi_awaddr => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 32)),
s_axi_awlen => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 8)),
s_axi_awsize => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 3)),
s_axi_awburst => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 2)),
s_axi_awvalid => '0',
s_axi_wdata => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 8)),
s_axi_wstrb => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 1)),
s_axi_wlast => '0',
s_axi_wvalid => '0',
s_axi_bready => '0',
s_axi_arid => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 4)),
s_axi_araddr => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 32)),
s_axi_arlen => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 8)),
s_axi_arsize => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 3)),
s_axi_arburst => STD_LOGIC_VECTOR(TO_UNSIGNED(0, 2)),
s_axi_arvalid => '0',
s_axi_rready => '0',
s_axi_injectsbiterr => '0',
s_axi_injectdbiterr => '0'
);
END FrameBuffer_arch;
|
-------------------------------------------------------------------------------
-- AXI Lite IP Interface (IPIF) - entity/architecture pair
-------------------------------------------------------------------------------
--
-- ************************************************************************
-- ** DISCLAIMER OF LIABILITY **
-- ** **
-- ** This file contains proprietary and confidential information of **
-- ** Xilinx, Inc. ("Xilinx"), that is distributed under a license **
-- ** from Xilinx, and may be used, copied and/or disclosed only **
-- ** pursuant to the terms of a valid license agreement with Xilinx. **
-- ** **
-- ** XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION **
-- ** ("MATERIALS") "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER **
-- ** EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING WITHOUT **
-- ** LIMITATION, ANY WARRANTY WITH RESPECT TO NONINFRINGEMENT, **
-- ** MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. Xilinx **
-- ** does not warrant that functions included in the Materials will **
-- ** meet the requirements of Licensee, or that the operation of the **
-- ** Materials will be uninterrupted or error-free, or that defects **
-- ** in the Materials will be corrected. Furthermore, Xilinx does **
-- ** not warrant or make any representations regarding use, or the **
-- ** results of the use, of the Materials in terms of correctness, **
-- ** accuracy, reliability or otherwise. **
-- ** **
-- ** Xilinx products are not designed or intended to be fail-safe, **
-- ** or for use in any application requiring fail-safe performance, **
-- ** such as life-support or safety devices or systems, Class III **
-- ** medical devices, nuclear facilities, applications related to **
-- ** the deployment of airbags, or any other applications that could **
-- ** lead to death, personal injury or severe property or **
-- ** environmental damage (individually and collectively, "critical **
-- ** applications"). Customer assumes the sole risk and liability **
-- ** of any use of Xilinx products in critical applications, **
-- ** subject only to applicable laws and regulations governing **
-- ** limitations on product liability. **
-- ** **
-- ** Copyright 2010 Xilinx, Inc. **
-- ** All rights reserved. **
-- ** **
-- ** This disclaimer and copyright notice must be retained as part **
-- ** of this file at all times. **
-- ************************************************************************
--
-------------------------------------------------------------------------------
-- Filename: system_xadc_wiz_0_0_axi_lite_ipif.vhd
-- Version: v1.01.a
-- Description: This is the top level design file for the axi_lite_ipif
-- function. It provides a standardized slave interface
-- between the IP and the AXI. This version supports
-- single read/write transfers only. It does not provide
-- address pipelining or simultaneous read and write
-- operations.
-------------------------------------------------------------------------------
-- Structure: This section shows the hierarchical structure of axi_lite_ipif.
--
-- --axi_lite_ipif.vhd
-- --slave_attachment.vhd
-- --address_decoder.vhd
-------------------------------------------------------------------------------
-- Author: BSB
--
-- History:
--
-- BSB 05/20/10 -- First version
-- ~~~~~~
-- - Created the first version v1.00.a
-- ^^^^^^
-- ~~~~~~
-- SK 06/09/10 -- v1.01.a
-- 1. updated to reduce the utilization
-- Closed CR #574507
-- 2. Optimized the state machine code
-- 3. Optimized the address decoder logic to generate the CE's with common logic
-- 4. Address GAP decoding logic is removed and timeout counter is made active
-- for all transactions.
-- ^^^^^^
-------------------------------------------------------------------------------
-- Naming Conventions:
-- active low signals: "*_n"
-- clock signals: "clk", "clk_div#", "clk_#x"
-- reset signals: "rst", "rst_n"
-- generics: "C_*"
-- user defined types: "*_TYPE"
-- state machine next state: "*_ns"
-- state machine current state: "*_cs"
-- combinatorial signals: "*_cmb"
-- pipelined or register delay signals: "*_d#"
-- counter signals: "*cnt*"
-- clock enable signals: "*_ce"
-- internal version of output port "*_i"
-- device pins: "*_pin"
-- ports: - Names begin with Uppercase
-- processes: "*_PROCESS"
-- component instantiations: "<ENTITY_>I_<#|FUNC>
-------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
use ieee.numeric_std.all;
use ieee.std_logic_misc.all;
library work;
use work.system_xadc_wiz_0_0_proc_common_pkg.all;
use work.system_xadc_wiz_0_0_proc_common_pkg.clog2;
use work.system_xadc_wiz_0_0_proc_common_pkg.max2;
use work.system_xadc_wiz_0_0_family_support.all;
use work.system_xadc_wiz_0_0_ipif_pkg.all;
--library axi_lite_ipif_v1_01_a;
-- use axi_lite_ipif_v1_01_a.all;
-------------------------------------------------------------------------------
-- Definition of Generics
-------------------------------------------------------------------------------
-- C_S_AXI_DATA_WIDTH -- AXI data bus width
-- C_S_AXI_ADDR_WIDTH -- AXI address bus width
-- C_S_AXI_MIN_SIZE -- Minimum address range of the IP
-- C_USE_WSTRB -- Use write strobs or not
-- C_DPHASE_TIMEOUT -- Data phase time out counter
-- C_ARD_ADDR_RANGE_ARRAY-- Base /High Address Pair for each Address Range
-- C_ARD_NUM_CE_ARRAY -- Desired number of chip enables for an address range
-- C_FAMILY -- Target FPGA family
-------------------------------------------------------------------------------
-- Definition of Ports
-------------------------------------------------------------------------------
-- s_axi_aclk -- AXI Clock
-- s_axi_aresetn -- AXI Reset
-- s_axi_awaddr -- AXI Write address
-- s_axi_awvalid -- Write address valid
-- s_axi_awready -- Write address ready
-- s_axi_wdata -- Write data
-- s_axi_wstrb -- Write strobes
-- s_axi_wvalid -- Write valid
-- s_axi_wready -- Write ready
-- s_axi_bresp -- Write response
-- s_axi_bvalid -- Write response valid
-- s_axi_bready -- Response ready
-- s_axi_araddr -- Read address
-- s_axi_arvalid -- Read address valid
-- s_axi_arready -- Read address ready
-- s_axi_rdata -- Read data
-- s_axi_rresp -- Read response
-- s_axi_rvalid -- Read valid
-- s_axi_rready -- Read ready
-- Bus2IP_Clk -- Synchronization clock provided to User IP
-- Bus2IP_Reset -- Active high reset for use by the User IP
-- Bus2IP_Addr -- Desired address of read or write operation
-- Bus2IP_RNW -- Read or write indicator for the transaction
-- Bus2IP_BE -- Byte enables for the data bus
-- Bus2IP_CS -- Chip select for the transcations
-- Bus2IP_RdCE -- Chip enables for the read
-- Bus2IP_WrCE -- Chip enables for the write
-- Bus2IP_Data -- Write data bus to the User IP
-- IP2Bus_Data -- Input Read Data bus from the User IP
-- IP2Bus_WrAck -- Active high Write Data qualifier from the IP
-- IP2Bus_RdAck -- Active high Read Data qualifier from the IP
-- IP2Bus_Error -- Error signal from the IP
-------------------------------------------------------------------------------
entity system_xadc_wiz_0_0_axi_lite_ipif is
generic (
C_S_AXI_DATA_WIDTH : integer range 32 to 32 := 32;
C_S_AXI_ADDR_WIDTH : integer := 32;
C_S_AXI_MIN_SIZE : std_logic_vector(31 downto 0):= X"000001FF";
C_USE_WSTRB : integer := 0;
C_DPHASE_TIMEOUT : integer range 0 to 512 := 8;
C_ARD_ADDR_RANGE_ARRAY: SLV64_ARRAY_TYPE := -- not used
(
X"0000_0000_7000_0000", -- IP user0 base address
X"0000_0000_7000_00FF", -- IP user0 high address
X"0000_0000_7000_0100", -- IP user1 base address
X"0000_0000_7000_01FF" -- IP user1 high address
);
C_ARD_NUM_CE_ARRAY : INTEGER_ARRAY_TYPE := -- not used
(
4, -- User0 CE Number
12 -- User1 CE Number
);
C_FAMILY : string := "virtex6"
);
port (
--System signals
s_axi_aclk : in std_logic;
s_axi_aresetn : in std_logic;
s_axi_awaddr : in std_logic_vector
(C_S_AXI_ADDR_WIDTH-1 downto 0);
s_axi_awvalid : in std_logic;
s_axi_awready : out std_logic;
s_axi_wdata : in std_logic_vector
(C_S_AXI_DATA_WIDTH-1 downto 0);
s_axi_wstrb : in std_logic_vector
((C_S_AXI_DATA_WIDTH/8)-1 downto 0);
s_axi_wvalid : in std_logic;
s_axi_wready : out std_logic;
s_axi_bresp : out std_logic_vector(1 downto 0);
s_axi_bvalid : out std_logic;
s_axi_bready : in std_logic;
s_axi_araddr : in std_logic_vector
(C_S_AXI_ADDR_WIDTH-1 downto 0);
s_axi_arvalid : in std_logic;
s_axi_arready : out std_logic;
s_axi_rdata : out std_logic_vector
(C_S_AXI_DATA_WIDTH-1 downto 0);
s_axi_rresp : out std_logic_vector(1 downto 0);
s_axi_rvalid : out std_logic;
s_axi_rready : in std_logic;
-- Controls to the IP/IPIF modules
Bus2IP_Clk : out std_logic;
Bus2IP_Resetn : out std_logic;
Bus2IP_Addr : out std_logic_vector
((C_S_AXI_ADDR_WIDTH-1) downto 0);
Bus2IP_RNW : out std_logic;
Bus2IP_BE : out std_logic_vector
(((C_S_AXI_DATA_WIDTH/8)-1) downto 0);
Bus2IP_CS : out std_logic_vector
(((C_ARD_ADDR_RANGE_ARRAY'LENGTH)/2-1) downto 0);
Bus2IP_RdCE : out std_logic_vector
((calc_num_ce(C_ARD_NUM_CE_ARRAY)-1) downto 0);
Bus2IP_WrCE : out std_logic_vector
((calc_num_ce(C_ARD_NUM_CE_ARRAY)-1) downto 0);
Bus2IP_Data : out std_logic_vector
((C_S_AXI_DATA_WIDTH-1) downto 0);
IP2Bus_Data : in std_logic_vector
((C_S_AXI_DATA_WIDTH-1) downto 0);
IP2Bus_WrAck : in std_logic;
IP2Bus_RdAck : in std_logic;
IP2Bus_Error : in std_logic
);
end system_xadc_wiz_0_0_axi_lite_ipif;
-------------------------------------------------------------------------------
-- Architecture
-------------------------------------------------------------------------------
architecture imp of system_xadc_wiz_0_0_axi_lite_ipif is
-------------------------------------------------------------------------------
-- Begin architecture logic
-------------------------------------------------------------------------------
begin
-------------------------------------------------------------------------------
-- Slave Attachment
-------------------------------------------------------------------------------
I_SLAVE_ATTACHMENT: entity work.system_xadc_wiz_0_0_slave_attachment
generic map(
C_ARD_ADDR_RANGE_ARRAY => C_ARD_ADDR_RANGE_ARRAY,
C_ARD_NUM_CE_ARRAY => C_ARD_NUM_CE_ARRAY,
C_IPIF_ABUS_WIDTH => C_S_AXI_ADDR_WIDTH,
C_IPIF_DBUS_WIDTH => C_S_AXI_DATA_WIDTH,
C_USE_WSTRB => C_USE_WSTRB,
C_DPHASE_TIMEOUT => C_DPHASE_TIMEOUT,
C_S_AXI_MIN_SIZE => C_S_AXI_MIN_SIZE,
C_FAMILY => C_FAMILY
)
port map(
-- AXI signals
s_axi_aclk => s_axi_aclk,
s_axi_aresetn => s_axi_aresetn,
s_axi_awaddr => s_axi_awaddr,
s_axi_awvalid => s_axi_awvalid,
s_axi_awready => s_axi_awready,
s_axi_wdata => s_axi_wdata,
s_axi_wstrb => s_axi_wstrb,
s_axi_wvalid => s_axi_wvalid,
s_axi_wready => s_axi_wready,
s_axi_bresp => s_axi_bresp,
s_axi_bvalid => s_axi_bvalid,
s_axi_bready => s_axi_bready,
s_axi_araddr => s_axi_araddr,
s_axi_arvalid => s_axi_arvalid,
s_axi_arready => s_axi_arready,
s_axi_rdata => s_axi_rdata,
s_axi_rresp => s_axi_rresp,
s_axi_rvalid => s_axi_rvalid,
s_axi_rready => s_axi_rready,
-- IPIC signals
Bus2IP_Clk => Bus2IP_Clk,
Bus2IP_Resetn => Bus2IP_Resetn,
Bus2IP_Addr => Bus2IP_Addr,
Bus2IP_RNW => Bus2IP_RNW,
Bus2IP_BE => Bus2IP_BE,
Bus2IP_CS => Bus2IP_CS,
Bus2IP_RdCE => Bus2IP_RdCE,
Bus2IP_WrCE => Bus2IP_WrCE,
Bus2IP_Data => Bus2IP_Data,
IP2Bus_Data => IP2Bus_Data,
IP2Bus_WrAck => IP2Bus_WrAck,
IP2Bus_RdAck => IP2Bus_RdAck,
IP2Bus_Error => IP2Bus_Error
);
end imp;
|
--------------------------------------------------------------------------------
-- Company:
-- Engineer:
--
-- Create Date: 17:55:00 11/18/2013
-- Design Name:
-- Module Name: C:/Users/etingi01/Mips32_948282_18.11.2013/My_16bitOr_tb_948282.vhd
-- Project Name: Mips32_948282_18.11.2013
-- Target Device:
-- Tool versions:
-- Description:
--
-- VHDL Test Bench Created by ISE for module: My_16bitOr_948282
--
-- Dependencies:
--
-- Revision:
-- Revision 0.01 - File Created
-- Additional Comments:
--
-- Notes:
-- This testbench has been automatically generated using types std_logic and
-- std_logic_vector for the ports of the unit under test. Xilinx recommends
-- that these types always be used for the top-level I/O of a design in order
-- to guarantee that the testbench will bind correctly to the post-implementation
-- simulation model.
--------------------------------------------------------------------------------
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
--USE ieee.numeric_std.ALL;
ENTITY My_16bitOr_tb_948282 IS
END My_16bitOr_tb_948282;
ARCHITECTURE behavior OF My_16bitOr_tb_948282 IS
-- Component Declaration for the Unit Under Test (UUT)
COMPONENT My_16bitOr_948282
PORT(
A_el_8282 : IN std_logic_vector(15 downto 0);
B_el_8282 : IN std_logic_vector(15 downto 0);
R_el_8282 : OUT std_logic_vector(15 downto 0)
);
END COMPONENT;
--Inputs
signal A_el_8282 : std_logic_vector(15 downto 0) := (others => '0');
signal B_el_8282 : std_logic_vector(15 downto 0) := (others => '0');
--Outputs
signal R_el_8282 : std_logic_vector(15 downto 0);
-- No clocks detected in port list. Replace <clock> below with
-- appropriate port name
constant clk_period : time := 10 ns;
BEGIN
-- Instantiate the Unit Under Test (UUT)
uut: My_16bitOr_948282 PORT MAP (
A_el_8282 => A_el_8282,
B_el_8282 => B_el_8282,
R_el_8282 => R_el_8282
);
-- Stimulus process
stim_proc: process
begin
-- hold reset state for 100 ns.
wait for 100 ns;
wait for clk_period*10;
A_el_8282<="0011001111001101";
B_el_8282<="0100100010001100";
wait;
end process;
END;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc885.vhd,v 1.2 2001-10-26 16:30:01 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c10s01b00x00p10n01i00885ent IS
END c10s01b00x00p10n01i00885ent;
ARCHITECTURE c10s01b00x00p10n01i00885arch OF c10s01b00x00p10n01i00885ent IS
signal S: INTEGER := 356;
BEGIN
TESTING: PROCESS
constant I: INTEGER := 105; -- loop parameter has same name
variable k: integer := 0;
BEGIN
-- assign process constant I to S
S <= I;
wait for 1 ns;
assert ( S = 105 )
report "constant not properly assigned to signal"
severity FAILURE;
-- loop parameter has same name as constant declared in process
for I in 1 to 5 loop
-- assign loop parameter I to S
S <= I;
wait for 1 ns;
if ((S<1) or (S>5)) then
k := 1;
end if;
assert ( ( S >= 1 ) and ( S <= 5 ) )
report "loop parameter not properly assigned to signal"
severity FAILURE;
end loop;
assert NOT( k=0 )
report "***PASSED TEST: c10s01b00x00p10n01i00885"
severity NOTE;
assert ( k=0 )
report "***FAILED TEST: c10s01b00x00p10n01i00885 - A declaration region is formed by the text of a loop statement."
severity ERROR;
wait;
END PROCESS TESTING;
END c10s01b00x00p10n01i00885arch;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc885.vhd,v 1.2 2001-10-26 16:30:01 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c10s01b00x00p10n01i00885ent IS
END c10s01b00x00p10n01i00885ent;
ARCHITECTURE c10s01b00x00p10n01i00885arch OF c10s01b00x00p10n01i00885ent IS
signal S: INTEGER := 356;
BEGIN
TESTING: PROCESS
constant I: INTEGER := 105; -- loop parameter has same name
variable k: integer := 0;
BEGIN
-- assign process constant I to S
S <= I;
wait for 1 ns;
assert ( S = 105 )
report "constant not properly assigned to signal"
severity FAILURE;
-- loop parameter has same name as constant declared in process
for I in 1 to 5 loop
-- assign loop parameter I to S
S <= I;
wait for 1 ns;
if ((S<1) or (S>5)) then
k := 1;
end if;
assert ( ( S >= 1 ) and ( S <= 5 ) )
report "loop parameter not properly assigned to signal"
severity FAILURE;
end loop;
assert NOT( k=0 )
report "***PASSED TEST: c10s01b00x00p10n01i00885"
severity NOTE;
assert ( k=0 )
report "***FAILED TEST: c10s01b00x00p10n01i00885 - A declaration region is formed by the text of a loop statement."
severity ERROR;
wait;
END PROCESS TESTING;
END c10s01b00x00p10n01i00885arch;
|
-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version.
-- VESTs is distributed in the hope that it will be useful, but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
-- You should have received a copy of the GNU General Public License
-- along with VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: tc885.vhd,v 1.2 2001-10-26 16:30:01 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c10s01b00x00p10n01i00885ent IS
END c10s01b00x00p10n01i00885ent;
ARCHITECTURE c10s01b00x00p10n01i00885arch OF c10s01b00x00p10n01i00885ent IS
signal S: INTEGER := 356;
BEGIN
TESTING: PROCESS
constant I: INTEGER := 105; -- loop parameter has same name
variable k: integer := 0;
BEGIN
-- assign process constant I to S
S <= I;
wait for 1 ns;
assert ( S = 105 )
report "constant not properly assigned to signal"
severity FAILURE;
-- loop parameter has same name as constant declared in process
for I in 1 to 5 loop
-- assign loop parameter I to S
S <= I;
wait for 1 ns;
if ((S<1) or (S>5)) then
k := 1;
end if;
assert ( ( S >= 1 ) and ( S <= 5 ) )
report "loop parameter not properly assigned to signal"
severity FAILURE;
end loop;
assert NOT( k=0 )
report "***PASSED TEST: c10s01b00x00p10n01i00885"
severity NOTE;
assert ( k=0 )
report "***FAILED TEST: c10s01b00x00p10n01i00885 - A declaration region is formed by the text of a loop statement."
severity ERROR;
wait;
END PROCESS TESTING;
END c10s01b00x00p10n01i00885arch;
|
----------------------------------------------------------------------------------
----------------------------------------------------------------------------
-- Author: Sam Bobrowicz
-- Copyright 2014 Digilent, Inc.
----------------------------------------------------------------------------
--
-- Create Date: 15:40:47 03/15/2013
-- Design Name:
-- Module Name: logo_display - Behavioral
-- Project Name:
-- Target Devices:
-- Tool versions:
-- Description:
--
--
-- Revision:
-- Revision 0.01 - File Created
-- Additional Comments:
--
----------------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
--use IEEE.NUMERIC_STD.ALL;
-- Uncomment the following library declaration if instantiating
-- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;
entity LogoDisplay is
Generic (
X_START : integer range 2 to (Integer'high) := 40;
Y_START : integer := 512
);
Port ( CLK_I : in STD_LOGIC;
H_COUNT_I : in STD_LOGIC_VECTOR(11 downto 0);
V_COUNT_I : in STD_LOGIC_VECTOR(11 downto 0);
RED_O : out STD_LOGIC_VECTOR(3 downto 0);
BLUE_O : out STD_LOGIC_VECTOR(3 downto 0);
GREEN_O : out STD_LOGIC_VECTOR(3 downto 0));
end LogoDisplay;
architecture Behavioral of LogoDisplay is
constant SZ_LOGO_WIDTH : natural := 335; -- Width of the logo frame
constant SZ_LOGO_HEIGHT : natural := 280; -- Height of the logo frame
COMPONENT BRAM_1
PORT (
clka : IN STD_LOGIC;
addra : IN STD_LOGIC_VECTOR(16 DOWNTO 0);
douta : OUT STD_LOGIC_VECTOR(11 DOWNTO 0)
);
END COMPONENT;
signal addr_reg : std_logic_vector(16 downto 0) := (others => '0');
signal douta : std_logic_vector(11 downto 0);
signal rst : std_logic;
signal en : std_logic;
begin
-- BRAM containing the logo data,
-- content in the BRAM_1.ngc file
Inst_BRAM_1 : BRAM_1
PORT MAP (
clka => CLK_I,
addra => addr_reg,
douta => douta
);
-- Restart Address Counter when Vcount arrives to the beginning of the Logo frame
rst <= '1' when (H_COUNT_I = 0 and V_COUNT_I = Y_START-1) else '0';
-- Increment Address counter only inside the frame
en <= '1' when (H_COUNT_I > X_START-2 and H_COUNT_I < X_START + SZ_LOGO_WIDTH - 1
and V_COUNT_I > Y_START and V_COUNT_I < Y_START + SZ_LOGO_HEIGHT -1 )
else '0';
-- Address counter
process (CLK_I, rst, en)
begin
if(rising_edge(CLK_I))then
if(rst = '1') then
addr_reg <= (others => '0');
elsif(en = '1') then
addr_reg <= addr_reg + 1;
end if;
end if;
end process;
-- Assign Outputs
RED_O <= douta(11 downto 8);
BLUE_O <= douta(3 downto 0);
GREEN_O <= douta(7 downto 4);
end Behavioral;
|
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity koc_signal is
generic (
axi_address_width : integer := 16; --! Defines the AXI4-Lite Address Width.
axi_data_width : integer := 32;
axi_control_offset : integer := 0;
axi_control_signal_bit_loc : integer := 0;
axi_control_status_bit_loc : integer := 1);
port (
-- Global Interface.
aclk : in std_logic; --! Clock. Tested with 50 MHz.
aresetn : in std_logic; --! Reset on low.
-- Slave AXI4-Lite Write interface.
axi_awaddr : in std_logic_vector(axi_address_width-1 downto 0); --! AXI4-Lite Address Write signal.
axi_awprot : in std_logic_vector(2 downto 0); --! AXI4-Lite Address Write signal.
axi_awvalid : in std_logic; --! AXI4-Lite Address Write signal.
axi_awready : out std_logic; --! AXI4-Lite Address Write signal.
axi_wvalid : in std_logic; --! AXI4-Lite Write Data signal.
axi_wready : out std_logic; --! AXI4-Lite Write Data signal.
axi_wdata : in std_logic_vector(axi_data_width-1 downto 0); --! AXI4-Lite Write Data signal.
axi_wstrb : in std_logic_vector(axi_data_width/8-1 downto 0); --! AXI4-Lite Write Data signal.
axi_bvalid : out std_logic; --! AXI4-Lite Write Response signal.
axi_bready : in std_logic; --! AXI4-Lite Write Response signal.
axi_bresp : out std_logic_vector(1 downto 0); --! AXI4-Lite Write Response signal.
-- Slave AXI4-Lite Read interface.
axi_araddr : in std_logic_vector(axi_address_width-1 downto 0); --! AXI4-Lite Address Read signal.
axi_arprot : in std_logic_vector(2 downto 0); --! AXI4-Lite Address Read signal.
axi_arvalid : in std_logic; --! AXI4-Lite Address Read signal.
axi_arready : out std_logic; --! AXI4-Lite Address Read signal.
axi_rdata : out std_logic_vector(axi_data_width-1 downto 0) := (others=>'0'); --! AXI4-Lite Read Data signal.
axi_rvalid : out std_logic; --! AXI4-Lite Read Data signal.
axi_rready : in std_logic; --! AXI4-Lite Read Data signal.
axi_rresp : out std_logic_vector(1 downto 0);
-- Events.
sig_out : out std_logic;
sig_in : in std_logic;
int : out std_logic);
end koc_signal;
architecture Behavioral of koc_signal is
component koc_signal_cntrl is
port (
aclk : in std_logic;
aresetn : in std_Logic;
sig_ack : in std_logic;
sig_trig : in std_logic;
sig_in : in std_logic;
sig_out : out std_logic;
int : out std_logic);
end component;
component koc_signal_axi4_write_cntrl is
generic (
axi_address_width : integer := 16;
axi_data_width : integer := 32;
reg_control_offset : std_logic_vector := X"0000";
reg_control_signal_bit_loc : integer := 0;
reg_control_status_bit_loc : integer := 1);
port (
aclk : in std_logic;
aresetn : in std_logic;
axi_awaddr : in std_logic_vector(axi_address_width-1 downto 0);
axi_awprot : in std_logic_vector(2 downto 0);
axi_awvalid : in std_logic;
axi_awready : out std_logic;
axi_wvalid : in std_logic;
axi_wready : out std_logic;
axi_wdata : in std_logic_vector(axi_data_width-1 downto 0);
axi_wstrb : in std_logic_vector(axi_data_width/8-1 downto 0);
axi_bvalid : out std_logic;
axi_bready : in std_logic;
axi_bresp : out std_logic_vector(1 downto 0);
sig_trig : out std_logic;
sig_ack : out std_logic);
end component;
component koc_signal_axi4_read_cntrl is
generic (
axi_address_width : integer := 16;
axi_data_width : integer := 32;
reg_control_offset : std_logic_vector := X"0000";
reg_control_signal_bit_loc : integer := 0;
reg_control_status_bit_loc : integer := 1);
port (
aclk : in std_logic;
aresetn : in std_logic;
axi_araddr : in std_logic_vector(axi_address_width-1 downto 0);
axi_arprot : in std_logic_vector(2 downto 0);
axi_arvalid : in std_logic;
axi_arready : out std_logic;
axi_rdata : out std_logic_vector(axi_data_width-1 downto 0) := (others=>'0');
axi_rvalid : out std_logic;
axi_rready : in std_logic;
axi_rresp : out std_logic_vector(1 downto 0);
int : in std_logic);
end component;
constant axi_control_offset_slv : std_logic_vector := std_logic_vector(to_unsigned(axi_control_offset,axi_address_width));
signal sig_ack : std_logic;
signal sig_trig : std_logic;
signal int_buff : std_logic;
begin
int <= int_buff;
koc_signal_cntrl_inst : koc_signal_cntrl
port map (
aclk => aclk,
aresetn => aresetn,
sig_ack => sig_ack,
sig_trig => sig_trig,
sig_in => sig_in,
sig_out => sig_out,
int => int_buff);
koc_signal_axi4_write_cntrl_inst : koc_signal_axi4_write_cntrl
generic map (
axi_address_width => axi_address_width,
axi_data_width => axi_data_width,
reg_control_offset => axi_control_offset_slv,
reg_control_signal_bit_loc => axi_control_signal_bit_loc,
reg_control_status_bit_loc => axi_control_status_bit_loc)
port map (
aclk => aclk,
aresetn => aresetn,
axi_awaddr => axi_awaddr,
axi_awprot => axi_awprot,
axi_awvalid => axi_awvalid,
axi_awready => axi_awready,
axi_wvalid => axi_wvalid,
axi_wready => axi_wready,
axi_wdata => axi_wdata,
axi_wstrb => axi_wstrb,
axi_bvalid => axi_bvalid,
axi_bready => axi_bready,
axi_bresp => axi_bresp,
sig_trig => sig_trig,
sig_ack => sig_ack);
koc_signal_axi4_read_cntrl_inst : koc_signal_axi4_read_cntrl
generic map (
axi_address_width => axi_address_width,
axi_data_width => axi_data_width,
reg_control_offset => axi_control_offset_slv,
reg_control_signal_bit_loc => axi_control_signal_bit_loc,
reg_control_status_bit_loc => axi_control_status_bit_loc)
port map (
aclk => aclk,
aresetn => aresetn,
axi_araddr => axi_araddr,
axi_arprot => axi_arprot,
axi_arvalid => axi_arvalid,
axi_arready => axi_arready,
axi_rdata => axi_rdata,
axi_rvalid => axi_rvalid,
axi_rready => axi_rready,
axi_rresp => axi_rresp,
int => int_buff);
end Behavioral;
|
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
entity adder is
port(A : out std_logic;
clock : in std_logic);
end adder;
architecture behv of adder is
function rising_edge(c : in std_logic) return std_logic;
begin
process(A) is
begin
if rising_edge(clock) then
A <= '0';
end if;
end process;
end behv;
|
library ieee;
use ieee.std_logic_1164.all;
library ieee;
use ieee.numeric_std.all;
entity mul_192 is
port (
result : out std_logic_vector(29 downto 0);
in_a : in std_logic_vector(29 downto 0);
in_b : in std_logic_vector(10 downto 0)
);
end mul_192;
architecture augh of mul_192 is
signal tmp_res : signed(40 downto 0);
begin
-- The actual multiplication
tmp_res <= signed(in_a) * signed(in_b);
-- Set the output
result <= std_logic_vector(tmp_res(29 downto 0));
end architecture;
|
library ieee;
use ieee.std_logic_1164.all;
library ieee;
use ieee.numeric_std.all;
entity mul_192 is
port (
result : out std_logic_vector(29 downto 0);
in_a : in std_logic_vector(29 downto 0);
in_b : in std_logic_vector(10 downto 0)
);
end mul_192;
architecture augh of mul_192 is
signal tmp_res : signed(40 downto 0);
begin
-- The actual multiplication
tmp_res <= signed(in_a) * signed(in_b);
-- Set the output
result <= std_logic_vector(tmp_res(29 downto 0));
end architecture;
|
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity alu is
generic (WIDTH: integer := 8);
port ( I_a, I_b : in STD_LOGIC_VECTOR (WIDTH-1 downto 0);
I_op : in STD_LOGIC_VECTOR (2 downto 0);
O_isZero : out STD_LOGIC;
O_y : buffer STD_LOGIC_VECTOR (WIDTH-1 downto 0));
end alu;
architecture Behavioral of alu is
begin
process(I_a, I_b, I_op)
variable aluResult : STD_LOGIC_VECTOR (WIDTH-1 downto 0);
variable checkForZero : STD_LOGIC_VECTOR (WIDTH-1 downto 0);
begin
if(I_op = "000") then
-- ADD
aluResult := I_a + I_b;
checkForZero := aluResult;
elsif (I_op = "001") then
-- SUB
aluResult := I_a - I_b;
checkForZero := aluResult;
elsif (I_op = "010") then
-- NOT A + B
aluResult := NOT I_a + I_b;
checkForZero := aluResult;
elsif (I_op = "011") then
-- SLT
aluResult := (0 => I_a(WIDTH-1), others => '0'); -- SLT: implied comparison with 0
checkForZero := I_a; -- isZero is set based on the value of I_a
elsif (I_op = "100") then
-- Inverse SUB
aluResult := I_b - I_a;
checkForZero := aluResult;
else
aluResult := (others => 'X');
checkForZero := (others => 'X');
end if;
-- Outputs
O_y <= aluResult;
if(checkForZero = X"0") then
O_isZero <= '1';
else
O_isZero <= '0';
end if;
end process;
end Behavioral;
|
-- libraries --------------------------------------------------------------------------------- {{{
library IEEE;
use IEEE.STD_LOGIC_1164.all;
use IEEE.NUMERIC_STD.ALL;
use ieee.std_logic_textio.all;
use std.textio.all;
------------------------------------------------------------------------------------------------- }}}
package FGPU_definitions is
constant N_CU_W : natural := 2; --0 to 3
-- Bitwidth of # of CUs
constant LMEM_ADDR_W : natural := 10;
-- bitwidth of local memory address for a single PE
constant N_AXI_W : natural := 0;
-- Bitwidth of # of AXI data ports
constant SUB_INTEGER_IMPLEMENT : natural := 0;
-- implement sub-integer store operations
constant N_STATIONS_ALU : natural := 6;
-- # stations to store memory requests sourced by a single ALU
constant ATOMIC_IMPLEMENT : natural := 0;
-- implement global atomic operations
constant LMEM_IMPLEMENT : natural := 1;
-- implement local scratchpad
constant N_TAG_MANAGERS_W : natural := N_CU_W+0; -- 0 to 1
-- Bitwidth of # tag controllers per CU
constant RD_CACHE_N_WORDS_W : natural := 0;
constant RD_CACHE_FIFO_PORTB_ADDR_W : natural := 6;
constant FLOAT_IMPLEMENT : natural := 0;
constant FADD_IMPLEMENT : integer := 1;
constant FMUL_IMPLEMENT : integer := 1;
constant FDIV_IMPLEMENT : integer := 0;
constant FSQRT_IMPLEMENT : integer := 1;
constant UITOFP_IMPLEMENT : integer := 1;
constant FSLT_IMPLEMENT : integer := 0;
constant FRSQRT_IMPLEMENT : integer := 0;
constant FADD_DELAY : integer := 11;
constant UITOFP_DELAY : integer := 5;
constant FMUL_DELAY : integer := 8;
constant FDIV_DELAY : integer := 28;
constant FSQRT_DELAY : integer := 28;
constant FRSQRT_DELAY : integer := 28;
constant FSLT_DELAY : integer := 2;
constant MAX_FPU_DELAY : integer := FDIV_DELAY;
constant CACHE_N_BANKS_W : natural := 3;
-- Bitwidth of # words within a cache line. Minimum is 2
constant N_RECEIVERS_CU_W : natural := 6-N_CU_W;
-- Bitwidth of # of receivers inside the global memory controller per CU. (6-N_CU_W) will lead to 64 receivers whatever the # of CU is.
constant BURST_WORDS_W : natural := 5;
-- Bitwidth # of words within a single AXI burst
constant ENABLE_READ_PRIORIRY_PIPE : boolean := false;
constant FIFO_ADDR_W : natural := 3;
-- Bitwidth of the fifo size to store outgoing memory requests from a CU
constant N_RD_FIFOS_TAG_MANAGER_W : natural := 0;
constant FINISH_FIFO_ADDR_W : natural := 3;
-- Bitwidth of the fifo depth to mark dirty cache lines to be cleared at the end
-- constant CRAM_BLOCKS : natural := 1;
-- # of CRAM replicates. Each replicate will serve some CUs (1 or 2 supported only)
constant CV_W : natural := 3;
-- bitwidth of # of PEs within a CV
constant CV_TO_CACHE_SLICE : natural := 3;
constant INSTR_READ_SLICE : boolean := true;
constant RTM_WRITE_SLICE : boolean := true;
constant WRITE_PHASE_W : natural := 1;
-- # of MSBs of the receiver index in the global memory controller which will be selected to write. These bits increments always.
-- This incrmenetation should help to balance serving the receivers
constant RCV_PRIORITY_W : natural := 3;
constant N_WF_CU_W : natural := 3;
-- bitwidth of # of WFs that can be simultaneously managed within a CU
constant AADD_ATOMIC : natural := 1;
constant AMAX_ATOMIC : natural := 1;
constant GMEM_N_BANK_W : natural := 1;
constant ID_WIDTH : natural := 6;
constant PHASE_W : natural := 3;
constant CV_SIZE : natural := 2**CV_W;
constant RD_CACHE_N_WORDS : natural := 2**RD_CACHE_N_WORDS_W;
constant WF_SIZE_W : natural := PHASE_W + CV_W;
-- A WF will be executed on the PEs of a single CV withen PAHSE_LEN cycels
constant WG_SIZE_W : natural := WF_SIZE_W + N_WF_CU_W;
-- A WG must be executed on a single CV. It contains a number of WFs which is at maximum the amount that can be managed within a CV
constant RTM_ADDR_W : natural := 1+2+N_WF_CU_W+PHASE_W; -- 1+2+3+3 = 9bit
-- The MSB if select between local indcs or other information
-- The lower 2 MSBs for d0, d1 or d2. The middle N_WF_CU_W are for the WF index with the CV. The lower LSBs are for the phase index
constant RTM_DATA_W : natural := CV_SIZE*WG_SIZE_W; -- Bitwidth of RTM data ports
constant BURST_W : natural := BURST_WORDS_W - GMEM_N_BANK_W; -- burst width in number of transfers on the axi bus
constant RD_FIFO_N_BURSTS_W : natural := 1;
constant RD_FIFO_W : natural := BURST_W + RD_FIFO_N_BURSTS_W;
constant N_TAG_MANAGERS : natural := 2**N_TAG_MANAGERS_W;
constant N_AXI : natural := 2**N_AXI_W;
constant N_WR_FIFOS_AXI_W : natural := N_TAG_MANAGERS_W-N_AXI_W;
constant INTERFCE_W_ADDR_W : natural := 14;
constant CRAM_ADDR_W : natural := 12; -- TODO
constant DATA_W : natural := 32;
constant BRAM18kb32b_ADDR_W : natural := 9;
constant BRAM36kb64b_ADDR_W : natural := 9;
constant BRAM36kb_ADDR_W : natural := 10;
constant INST_FIFO_PRE_LEN : natural := 8;
constant CV_INST_FIFO_W : natural := 3;
constant LOC_MEM_W : natural := BRAM18kb32b_ADDR_W;
constant N_PARAMS_W : natural := 4;
constant GMEM_ADDR_W : natural := 32;
constant WI_REG_ADDR_W : natural := 5;
constant N_REG_BLOCKS_W : natural := 2;
constant REG_FILE_BLOCK_W : natural := PHASE_W+WI_REG_ADDR_W+N_WF_CU_W-N_REG_BLOCKS_W; -- default=3+5+3-2=9
constant N_WR_FIFOS_W : natural := N_WR_FIFOS_AXI_W + N_AXI_W;
constant N_WR_FIFOS_AXI : natural := 2**N_WR_FIFOS_AXI_W;
constant N_WR_FIFOS : natural := 2**N_WR_FIFOS_W;
constant STAT : natural := 1;
constant STAT_LOAD : natural := 0;
-- cache & gmem controller constants
constant BRMEM_ADDR_W : natural := BRAM36kb_ADDR_W; -- default=10
constant N_RD_PORTS : natural := 4;
constant N : natural := CACHE_N_BANKS_W; -- max. 3
constant L : natural := BURST_WORDS_W-N; -- min. 2
constant M : natural := BRMEM_ADDR_W - L; -- max. 8
-- L+M = BMEM_ADDR_W = 10 = #address bits of a BRAM
-- cache size = 2^(N+L+M) words; max.=8*4KB=32KB
constant N_RECEIVERS_CU : natural := 2**N_RECEIVERS_CU_W;
constant N_RECEIVERS_W : natural := N_CU_W + N_RECEIVERS_CU_W;
constant N_RECEIVERS : natural := 2**N_RECEIVERS_W;
constant N_CU_STATIONS_W : natural := 6;
constant GMEM_WORD_ADDR_W : natural := GMEM_ADDR_W - 2;
constant TAG_W : natural := GMEM_WORD_ADDR_W -M -L -N;
constant GMEM_N_BANK : natural := 2**GMEM_N_BANK_W;
constant CACHE_N_BANKS : natural := 2**CACHE_N_BANKS_W;
constant REG_FILE_W : natural := N_REG_BLOCKS_W+REG_FILE_BLOCK_W;
constant N_REG_BLOCKS : natural := 2**N_REG_BLOCKS_W;
constant REG_ADDR_W : natural := BRAM18kb32b_ADDR_W+BRAM18kb32b_ADDR_W;
constant REG_FILE_SIZE : natural := 2**REG_ADDR_W;
constant REG_FILE_BLOCK_SIZE : natural := 2**REG_FILE_BLOCK_W;
constant GMEM_DATA_W : natural := GMEM_N_BANK * DATA_W;
constant N_PARAMS : natural := 2**N_PARAMS_W;
constant LOC_MEM_SIZE : natural := 2**LOC_MEM_W;
constant PHASE_LEN : natural := 2**PHASE_W;
constant CV_INST_FIFO_SIZE : natural := 2**CV_INST_FIFO_W;
constant N_CU : natural := 2**N_CU_W;
constant N_WF_CU : natural := 2**N_WF_CU_W;
constant WF_SIZE : natural := 2**WF_SIZE_W;
constant CRAM_SIZE : natural := 2**CRAM_ADDR_W;
constant RTM_SIZE : natural := 2**RTM_ADDR_W;
constant BRAM18kb_SIZE : natural := 2**BRAM18kb32b_ADDR_W;
constant regFile_addr : natural := 2**(INTERFCE_W_ADDR_W-1); -- "10" of the address msbs to choose the register file
constant Rstat_addr : natural := regFile_addr + 0; --address of status register in the register file
constant Rstart_addr : natural := regFile_addr + 1; --address of stat register in the register file
constant RcleanCache_addr : natural := regFile_addr + 2; --address of cleanCache register in the register file
constant RInitiate_addr : natural := regFile_addr + 3; --address of cleanCache register in the register file
constant Rstat_regFile_addr : natural := 0; --address of status register in the register file
constant Rstart_regFile_addr : natural := 1; --address of stat register in the register file
constant RcleanCache_regFile_addr : natural := 2; --address of cleanCache register in the register file
constant RInitiate_regFile_addr : natural := 3; --address of initiate register in the register file
constant N_REG_W : natural := 2;
constant PARAMS_ADDR_LOC_MEM_OFFSET : natural := LOC_MEM_SIZE - N_PARAMS;
-- constant GMEM_RQST_BUS_W : natural := GMEM_DATA_W;
-- new kernel descriptor ----------------------------------------------------------------
constant NEW_KRNL_DESC_W : natural := 5; -- length of the kernel's descripto
constant NEW_KRNL_INDX_W : natural := 4; -- bitwidth of number of kernels that can be started
constant NEW_KRNL_DESC_LEN : natural := 12;
constant WG_MAX_SIZE : natural := 2**WG_SIZE_W;
constant NEW_KRNL_DESC_MAX_LEN : natural := 2**NEW_KRNL_DESC_W;
constant NEW_KRNL_MAX_INDX : natural := 2**NEW_KRNL_INDX_W;
constant KRNL_SCH_ADDR_W : natural := NEW_KRNL_DESC_W + NEW_KRNL_INDX_W;
constant NEW_KRNL_DESC_N_WF : natural range 0 to NEW_KRNL_DESC_MAX_LEN-1 := 0;
constant NEW_KRNL_DESC_ID0_SIZE : natural range 0 to NEW_KRNL_DESC_MAX_LEN-1 := 1;
constant NEW_KRNL_DESC_ID1_SIZE : natural range 0 to NEW_KRNL_DESC_MAX_LEN-1 := 2;
constant NEW_KRNL_DESC_ID2_SIZE : natural range 0 to NEW_KRNL_DESC_MAX_LEN-1 := 3;
constant NEW_KRNL_DESC_ID0_OFFSET : natural range 0 to NEW_KRNL_DESC_MAX_LEN-1 := 4;
constant NEW_KRNL_DESC_ID1_OFFSET : natural range 0 to NEW_KRNL_DESC_MAX_LEN-1 := 5;
constant NEW_KRNL_DESC_ID2_OFFSET : natural range 0 to NEW_KRNL_DESC_MAX_LEN-1 := 6;
constant NEW_KRNL_DESC_WG_SIZE : natural range 0 to NEW_KRNL_DESC_MAX_LEN-1 := 7;
constant NEW_KRNL_DESC_N_WG_0 : natural range 0 to NEW_KRNL_DESC_MAX_LEN-1 := 8;
constant NEW_KRNL_DESC_N_WG_1 : natural range 0 to NEW_KRNL_DESC_MAX_LEN-1 := 9;
constant NEW_KRNL_DESC_N_WG_2 : natural range 0 to NEW_KRNL_DESC_MAX_LEN-1 := 10;
constant NEW_KRNL_DESC_N_PARAMS : natural range 0 to NEW_KRNL_DESC_MAX_LEN-1 := 11;
constant PARAMS_OFFSET : natural range 0 to NEW_KRNL_DESC_MAX_LEN-1 := 16;
constant WG_SIZE_0_OFFSET : natural := 0;
constant WG_SIZE_1_OFFSET : natural := 10;
constant WG_SIZE_2_OFFSET : natural := 20;
constant N_DIM_OFFSET : natural := 30;
constant ADDR_FIRST_INST_OFFSET : natural := 0;
constant ADDR_LAST_INST_OFFSET : natural := 14;
constant N_WF_OFFSET : natural := 28;
constant N_WG_0_OFFSET : natural := 16;
constant N_WG_1_OFFSET : natural := 0;
constant N_WG_2_OFFSET : natural := 16;
constant WG_SIZE_OFFSET : natural := 0;
constant N_PARAMS_OFFSET : natural := 28;
type cram_type is array (2**CRAM_ADDR_W-1 downto 0) of std_logic_vector (DATA_W-1 downto 0);
type slv32_array is array (natural range<>) of std_logic_vector(DATA_W-1 downto 0);
type krnl_scheduler_ram_TYPE is array (2**KRNL_SCH_ADDR_W-1 downto 0) of std_logic_vector (DATA_W-1 downto 0);
type cram_addr_array is array (natural range <>) of unsigned(CRAM_ADDR_W-1 downto 0); -- range 0 to CRAM_SIZE-1;
type rtm_ram_type is array (natural range <>) of unsigned(RTM_DATA_W-1 downto 0);
type gmem_addr_array is array (natural range<>) of unsigned(GMEM_ADDR_W-1 downto 0);
type op_arith_shift_type is (op_add, op_lw, op_mult, op_bra, op_shift, op_slt, op_mov, op_ato, op_lmem);
type op_logical_type is (op_andi, op_and, op_ori, op_or, op_xor, op_xori, op_nor);
type be_array is array(natural range <>) of std_logic_vector(DATA_W/8-1 downto 0);
type gmem_be_array is array(natural range <>) of std_logic_vector(GMEM_N_BANK*DATA_W/8-1 downto 0);
type sl_array is array(natural range <>) of std_logic;
type nat_array is array(natural range <>) of natural;
type nat_2d_array is array(natural range <>, natural range <>) of natural;
type reg_addr_array is array (natural range <>) of unsigned(REG_FILE_W-1 downto 0);
type gmem_word_addr_array is array(natural range <>) of unsigned(GMEM_WORD_ADDR_W-1 downto 0);
type gmem_addr_array_no_bank is array (natural range <>) of unsigned(GMEM_WORD_ADDR_W-CACHE_N_BANKS_W-1 downto 0);
type alu_en_vec_type is array(natural range <>) of std_logic_vector(CV_SIZE-1 downto 0);
type alu_en_rdAddr_type is array(natural range <>) of unsigned(PHASE_W+N_WF_CU_W-1 downto 0);
type tag_array is array (natural range <>) of unsigned(TAG_W-1 downto 0);
type gmem_word_array is array (natural range <>) of std_logic_vector(DATA_W*GMEM_N_BANK-1 downto 0);
type wf_active_array is array (natural range <>) of std_logic_vector(N_WF_CU-1 downto 0);
type cache_addr_array is array(natural range <>) of unsigned(M+L-1 downto 0);
type cache_word_array is array(natural range <>) of std_logic_vector(CACHE_N_BANKS*DATA_W-1 downto 0);
type tag_addr_array is array(natural range <>) of unsigned(M-1 downto 0);
type reg_file_block_array is array(natural range<>) of unsigned(REG_FILE_BLOCK_W-1 downto 0);
type id_array is array(natural range<>) of std_logic_vector(ID_WIDTH-1 downto 0);
type real_array is array (natural range <>) of real;
type atomic_sgntr_array is array (natural range <>) of std_logic_vector(N_CU_STATIONS_W-1 downto 0);
attribute max_fanout: integer;
attribute keep: string;
attribute mark_debug : string;
impure function init_krnl_ram(file_name : in string) return KRNL_SCHEDULER_RAM_type;
impure function init_SLV32_ARRAY_from_file(file_name : in string; len: in natural; file_len: in natural) return SLV32_ARRAY;
impure function init_CRAM(file_name : in string; file_len: in natural) return cram_type;
function pri_enc(datain: in std_logic_vector) return integer;
function max (LEFT, RIGHT: integer) return integer;
function min_int (LEFT, RIGHT: integer) return integer;
function clogb2 (bit_depth : integer) return integer;
--- ISA --------------------------------------------------------------------------------------
constant FAMILY_W : natural := 4;
constant CODE_W : natural := 4;
constant IMM_ARITH_W : natural := 14;
constant IMM_W : natural := 16;
constant BRANCH_ADDR_W : natural := 14;
constant FAMILY_POS : natural := 28;
constant CODE_POS : natural := 24;
constant RD_POS : natural := 0;
constant RS_POS : natural := 5;
constant RT_POS : natural := 10;
constant IMM_POS : natural := 10;
constant DIM_POS : natural := 5;
constant PARAM_POS : natural := 5;
constant BRANCH_ADDR_POS : natural := 10;
--------------- families
constant ADD_FAMILY : std_logic_vector(FAMILY_W-1 downto 0) := X"1";
constant SHF_FAMILY : std_logic_vector(FAMILY_W-1 downto 0) := X"2";
constant LGK_FAMILY : std_logic_vector(FAMILY_W-1 downto 0) := X"3";
constant MOV_FAMILY : std_logic_vector(FAMILY_W-1 downto 0) := X"4";
constant MUL_FAMILY : std_logic_vector(FAMILY_W-1 downto 0) := X"5";
constant BRA_FAMILY : std_logic_vector(FAMILY_W-1 downto 0) := X"6";
constant GLS_FAMILY : std_logic_vector(FAMILY_W-1 downto 0) := X"7";
constant ATO_FAMILY : std_logic_vector(FAMILY_W-1 downto 0) := X"8";
constant CTL_FAMILY : std_logic_vector(FAMILY_W-1 downto 0) := X"9";
constant RTM_FAMILY : std_logic_vector(FAMILY_W-1 downto 0) := X"A";
constant CND_FAMILY : std_logic_vector(FAMILY_W-1 downto 0) := X"B";
constant FLT_FAMILY : std_logic_vector(FAMILY_W-1 downto 0) := X"C";
constant LSI_FAMILY : std_logic_vector(FAMILY_W-1 downto 0) := X"D";
--------------- codes
--RTM
constant LID : std_logic_vector(CODE_W-1 downto 0) := X"0"; --upper two MSBs indicate if the operation is localdx or offsetdx
constant WGOFF : std_logic_vector(CODE_W-1 downto 0) := X"1";
constant SIZE : std_logic_vector(CODE_W-1 downto 0) := X"2";
constant WGID : std_logic_vector(CODE_W-1 downto 0) := X"3";
constant WGSIZE : std_logic_vector(CODE_W-1 downto 0) := X"4";
constant LP : std_logic_vector(CODE_W-1 downto 0) := X"8";
--ADD
constant ADD : std_logic_vector(CODE_W-1 downto 0) := "0000";
constant SUB : std_logic_vector(CODE_W-1 downto 0) := "0010";
constant ADDI : std_logic_vector(CODE_W-1 downto 0) := "0001";
constant LI : std_logic_vector(CODE_W-1 downto 0) := "1001";
constant LUI : std_logic_vector(CODE_W-1 downto 0) := "1101";
--MUL
constant MACC : std_logic_vector(CODE_W-1 downto 0) := "1000";
--BRA
constant BEQ : std_logic_vector(CODE_W-1 downto 0) := "0010";
constant BNE : std_logic_vector(CODE_W-1 downto 0) := "0011";
constant JSUB : std_logic_vector(CODE_W-1 downto 0) := "0100";
--GLS
constant LW : std_logic_vector(CODE_W-1 downto 0) := "0100";
constant SW : std_logic_vector(CODE_W-1 downto 0) := "1100";
--CTL
constant RET : std_logic_vector(CODE_W-1 downto 0) := "0010";
--SHF
constant SLLI : std_logic_vector(CODE_W-1 downto 0) := "0001";
--LGK
constant CODE_AND : std_logic_vector(CODE_W-1 downto 0) := "0000";
constant CODE_ANDI : std_logic_vector(CODE_W-1 downto 0) := "0001";
constant CODE_OR : std_logic_vector(CODE_W-1 downto 0) := "0010";
constant CODE_ORI : std_logic_vector(CODE_W-1 downto 0) := "0011";
constant CODE_XOR : std_logic_vector(CODE_W-1 downto 0) := "0100";
constant CODE_XORI : std_logic_vector(CODE_W-1 downto 0) := "0101";
constant CODE_NOR : std_logic_vector(CODE_W-1 downto 0) := "1000";
--ATO
constant CODE_AMAX : std_logic_vector(CODE_W-1 downto 0) := "0010";
constant CODE_AADD : std_logic_vector(CODE_W-1 downto 0) := "0001";
type branch_distance_vec is array(natural range <>) of unsigned(BRANCH_ADDR_W-1 downto 0);
type code_vec_type is array(natural range <>) of std_logic_vector(CODE_W-1 downto 0);
type atomic_type_vec_type is array(natural range <>) of std_logic_vector(2 downto 0);
end FGPU_definitions;
package body FGPU_definitions is
-- function called clogb2 that returns an integer which has the
--value of the ceiling of the log base 2
function clogb2 (bit_depth : integer) return integer is
variable depth : integer := bit_depth;
variable count : integer := 1;
begin
for clogb2 in 1 to bit_depth loop -- Works for up to 32 bit integers
if (bit_depth <= 2) then
count := 1;
else
if(depth <= 1) then
count := count;
else
depth := depth / 2;
count := count + 1;
end if;
end if;
end loop;
return(count);
end;
impure function init_krnl_ram(file_name : in string) return KRNL_SCHEDULER_RAM_type is
file init_file : text open read_mode is file_name;
variable init_line : line;
variable temp_bv : bit_vector(DATA_W-1 downto 0);
variable temp_mem : KRNL_SCHEDULER_RAM_type;
begin
for i in 0 to 16*32-1 loop
readline(init_file, init_line);
hread(init_line, temp_mem(i));
-- read(init_line, temp_bv);
-- temp_mem(i) := to_stdlogicvector(temp_bv);
end loop;
return temp_mem;
end function;
function max (LEFT, RIGHT: integer) return integer is
begin
if LEFT > RIGHT then return LEFT;
else return RIGHT;
end if;
end max;
function min_int (LEFT, RIGHT: integer) return integer is
begin
if LEFT > RIGHT then return RIGHT;
else return LEFT;
end if;
end min_int;
impure function init_CRAM(file_name : in string; file_len : in natural) return cram_type is
file init_file : text open read_mode is file_name;
variable init_line : line;
variable cram : cram_type;
-- variable tmp: std_logic_vector(DATA_W-1 downto 0);
begin
for i in 0 to file_len-1 loop
readline(init_file, init_line);
hread(init_line, cram(i)); -- vivado breaks when synthesizing hread(init_line, cram(0)(i)) without giving any indication about the error
-- cram(i) := tmp;
-- if CRAM_BLOCKS > 1 then
-- for j in 1 to max(1,CRAM_BLOCKS-1) loop
-- cram(j)(i) := cram(0)(i);
-- end loop;
-- end if;
end loop;
return cram;
end function;
impure function init_SLV32_ARRAY_from_file(file_name : in string; len : in natural; file_len : in natural) return SLV32_ARRAY is
file init_file : text open read_mode is file_name;
variable init_line : line;
variable temp_mem : SLV32_ARRAY(len-1 downto 0);
begin
for i in 0 to file_len-1 loop
readline(init_file, init_line);
hread(init_line, temp_mem(i));
end loop;
return temp_mem;
end function;
function pri_enc(datain: in std_logic_vector) return integer is
variable res : integer range 0 to datain'high;
begin
res := 0;
for i in datain'high downto 1 loop
if datain(i) = '1' then
res := i;
end if;
end loop;
return res;
end function;
end FGPU_definitions;
|
--========================================================================================================================
-- This VVC was generated with Bitvis VVC Generator
--========================================================================================================================
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
library uvvm_util;
context uvvm_util.uvvm_util_context;
library uvvm_vvc_framework;
use uvvm_vvc_framework.ti_vvc_framework_support_pkg.all;
use work.vvc_methods_pkg.all;
use work.vvc_cmd_pkg.all;
use work.td_target_support_pkg.all;
use work.td_vvc_entity_support_pkg.all;
use work.td_cmd_queue_pkg.all;
use work.td_result_queue_pkg.all;
--========================================================================================================================
entity clock_generator_vvc is
generic (
GC_INSTANCE_IDX : natural;
GC_CLOCK_NAME : string;
GC_CLOCK_PERIOD : time;
GC_CLOCK_HIGH_TIME : time;
GC_CMD_QUEUE_COUNT_MAX : natural := 1000;
GC_CMD_QUEUE_COUNT_THRESHOLD : natural := 950;
GC_CMD_QUEUE_COUNT_THRESHOLD_SEVERITY : t_alert_level := WARNING;
GC_RESULT_QUEUE_COUNT_MAX : natural := 1000;
GC_RESULT_QUEUE_COUNT_THRESHOLD : natural := 950;
GC_RESULT_QUEUE_COUNT_THRESHOLD_SEVERITY : t_alert_level := warning
);
port (
clk : out std_logic
);
begin
assert (GC_CLOCK_NAME'length <= 20) report "Clock name is too long (max 30 characters)" severity ERROR;
end entity clock_generator_vvc;
--========================================================================================================================
--========================================================================================================================
architecture behave of clock_generator_vvc is
constant C_SCOPE : string := C_VVC_NAME & "," & to_string(GC_INSTANCE_IDX);
constant C_VVC_LABELS : t_vvc_labels := assign_vvc_labels(C_SCOPE, C_VVC_NAME, GC_INSTANCE_IDX, NA);
signal executor_is_busy : boolean := false;
signal queue_is_increasing : boolean := false;
signal last_cmd_idx_executed : natural := 0;
signal terminate_current_cmd : t_flag_record;
signal clock_ena : boolean := false;
-- Instantiation of the element dedicated executor
shared variable command_queue : work.td_cmd_queue_pkg.t_generic_queue;
shared variable result_queue : work.td_result_queue_pkg.t_generic_queue;
alias vvc_config : t_vvc_config is shared_clock_generator_vvc_config(GC_INSTANCE_IDX);
alias vvc_status : t_vvc_status is shared_clock_generator_vvc_status(GC_INSTANCE_IDX);
alias transaction_info : t_transaction_info is shared_clock_generator_transaction_info(GC_INSTANCE_IDX);
alias clock_name : string is vvc_config.clock_name;
alias clock_period : time is vvc_config.clock_period;
alias clock_high_time : time is vvc_config.clock_high_time;
impure function get_clock_name
return string is
begin
return clock_name(1 to pos_of_leftmost(NUL, clock_name, clock_name'length));
end function;
begin
--========================================================================================================================
-- Constructor
-- - Set up the defaults and show constructor if enabled
--========================================================================================================================
work.td_vvc_entity_support_pkg.vvc_constructor(C_SCOPE, GC_INSTANCE_IDX, vvc_config, command_queue, result_queue, C_VOID_BFM_CONFIG,
GC_CMD_QUEUE_COUNT_MAX, GC_CMD_QUEUE_COUNT_THRESHOLD, GC_CMD_QUEUE_COUNT_THRESHOLD_SEVERITY,
GC_RESULT_QUEUE_COUNT_MAX, GC_RESULT_QUEUE_COUNT_THRESHOLD, GC_RESULT_QUEUE_COUNT_THRESHOLD_SEVERITY);
--========================================================================================================================
--========================================================================================================================
-- Config initializer
-- - Set up the VVC specific config fields
--========================================================================================================================
config_initializer : process
begin
loop
wait for 0 ns;
exit when shared_uvvm_state = PHASE_B;
end loop;
clock_name := (others => NUL);
clock_name(1 to GC_CLOCK_NAME'length) := GC_CLOCK_NAME;
clock_period := GC_CLOCK_PERIOD;
clock_high_time := GC_CLOCK_HIGH_TIME;
wait;
end process;
--========================================================================================================================
--========================================================================================================================
-- Command interpreter
-- - Interpret, decode and acknowledge commands from the central sequencer
--========================================================================================================================
cmd_interpreter : process
variable v_cmd_has_been_acked : boolean; -- Indicates if acknowledge_cmd() has been called for the current shared_vvc_cmd
variable v_local_vvc_cmd : t_vvc_cmd_record := C_VVC_CMD_DEFAULT;
begin
-- 0. Initialize the process prior to first command
work.td_vvc_entity_support_pkg.initialize_interpreter(terminate_current_cmd, global_awaiting_completion);
-- initialise shared_vvc_last_received_cmd_idx for channel and instance
shared_vvc_last_received_cmd_idx(NA, GC_INSTANCE_IDX) := 0;
-- Then for every single command from the sequencer
loop -- basically as long as new commands are received
-- 1. wait until command targeted at this VVC. Must match VVC name, instance and channel (if applicable)
-- releases global semaphore
-------------------------------------------------------------------------
work.td_vvc_entity_support_pkg.await_cmd_from_sequencer(C_VVC_LABELS, vvc_config, THIS_VVCT, VVC_BROADCAST, global_vvc_busy, global_vvc_ack, v_local_vvc_cmd);
v_cmd_has_been_acked := false; -- Clear flag
-- update shared_vvc_last_received_cmd_idx with received command index
shared_vvc_last_received_cmd_idx(NA, GC_INSTANCE_IDX) := v_local_vvc_cmd.cmd_idx;
-- 2a. Put command on the executor if intended for the executor
-------------------------------------------------------------------------
if v_local_vvc_cmd.command_type = QUEUED then
work.td_vvc_entity_support_pkg.put_command_on_queue(v_local_vvc_cmd, command_queue, vvc_status, queue_is_increasing);
-- 2b. Otherwise command is intended for immediate response
-------------------------------------------------------------------------
elsif v_local_vvc_cmd.command_type = IMMEDIATE then
case v_local_vvc_cmd.operation is
when AWAIT_COMPLETION =>
-- Await completion of all commands in the cmd_executor executor
work.td_vvc_entity_support_pkg.interpreter_await_completion(v_local_vvc_cmd, command_queue, vvc_config, executor_is_busy, C_VVC_LABELS, last_cmd_idx_executed);
when AWAIT_ANY_COMPLETION =>
if not v_local_vvc_cmd.gen_boolean then
-- Called with lastness = NOT_LAST: Acknowledge immediately to let the sequencer continue
work.td_target_support_pkg.acknowledge_cmd(global_vvc_ack,v_local_vvc_cmd.cmd_idx);
v_cmd_has_been_acked := true;
end if;
work.td_vvc_entity_support_pkg.interpreter_await_any_completion(v_local_vvc_cmd, command_queue, vvc_config, executor_is_busy, C_VVC_LABELS, last_cmd_idx_executed, global_awaiting_completion);
when DISABLE_LOG_MSG =>
uvvm_util.methods_pkg.disable_log_msg(v_local_vvc_cmd.msg_id, vvc_config.msg_id_panel, to_string(v_local_vvc_cmd.msg) & format_command_idx(v_local_vvc_cmd), C_SCOPE, v_local_vvc_cmd.quietness);
when ENABLE_LOG_MSG =>
uvvm_util.methods_pkg.enable_log_msg(v_local_vvc_cmd.msg_id, vvc_config.msg_id_panel, to_string(v_local_vvc_cmd.msg) & format_command_idx(v_local_vvc_cmd), C_SCOPE, v_local_vvc_cmd.quietness);
when FLUSH_COMMAND_QUEUE =>
work.td_vvc_entity_support_pkg.interpreter_flush_command_queue(v_local_vvc_cmd, command_queue, vvc_config, vvc_status, C_VVC_LABELS);
when TERMINATE_CURRENT_COMMAND =>
work.td_vvc_entity_support_pkg.interpreter_terminate_current_command(v_local_vvc_cmd, vvc_config, C_VVC_LABELS, terminate_current_cmd, executor_is_busy);
when others =>
tb_error("Unsupported command received for IMMEDIATE execution: '" & to_string(v_local_vvc_cmd.operation) & "'", C_SCOPE);
end case;
else
tb_error("command_type is not IMMEDIATE or QUEUED", C_SCOPE);
end if;
-- 3. Acknowledge command after runing or queuing the command
-------------------------------------------------------------------------
if not v_cmd_has_been_acked then
work.td_target_support_pkg.acknowledge_cmd(global_vvc_ack,v_local_vvc_cmd.cmd_idx);
end if;
end loop;
end process;
--========================================================================================================================
--========================================================================================================================
-- Command executor
-- - Fetch and execute the commands
--========================================================================================================================
cmd_executor : process
variable v_cmd : t_vvc_cmd_record;
variable v_timestamp_start_of_current_bfm_access : time := 0 ns;
variable v_timestamp_start_of_last_bfm_access : time := 0 ns;
variable v_timestamp_end_of_last_bfm_access : time := 0 ns;
variable v_command_is_bfm_access : boolean := false;
variable v_prev_command_was_bfm_access : boolean := false;
begin
-- 0. Initialize the process prior to first command
-------------------------------------------------------------------------
work.td_vvc_entity_support_pkg.initialize_executor(terminate_current_cmd);
loop
-- 1. Set defaults, fetch command and log
-------------------------------------------------------------------------
work.td_vvc_entity_support_pkg.fetch_command_and_prepare_executor(v_cmd, command_queue, vvc_config, vvc_status, queue_is_increasing, executor_is_busy, C_VVC_LABELS);
-- 2. Execute the fetched command
-------------------------------------------------------------------------
case v_cmd.operation is -- Only operations in the dedicated record are relevant
-- VVC dedicated operations
--===================================
when START_CLOCK =>
if clock_ena then
tb_error("Clock " & clock_name & " already running. " & format_msg(v_cmd), C_SCOPE);
else
clock_ena <= true;
wait for 0 ns;
log(ID_CLOCK_GEN, "Clock " & clock_name & " started", C_SCOPE);
end if;
when STOP_CLOCK =>
if not clock_ena then
tb_error("Clock " & clock_name & " already stopped. " & format_msg(v_cmd), C_SCOPE);
else
clock_ena <= false;
if clk then
wait until not clk;
end if;
log(ID_CLOCK_GEN, "Clock" & clock_name & " stopped", C_SCOPE);
end if;
when SET_CLOCK_PERIOD =>
clock_period := v_cmd.clock_period;
log(ID_CLOCK_GEN, "Clock " & clock_name & " period set to " & to_string(clock_period), C_SCOPE);
when SET_CLOCK_HIGH_TIME =>
clock_high_time := v_cmd.clock_high_time;
log(ID_CLOCK_GEN, "Clock " & clock_name & " high time set to " & to_string(clock_high_time), C_SCOPE);
-- UVVM common operations
--===================================
when INSERT_DELAY =>
log(ID_INSERTED_DELAY, "Running: " & to_string(v_cmd.proc_call) & " " & format_command_idx(v_cmd), C_SCOPE, vvc_config.msg_id_panel);
if v_cmd.gen_integer_array(0) = -1 then
-- Delay specified using time
wait until terminate_current_cmd.is_active = '1' for v_cmd.delay;
else
-- Delay specified using integer
wait until terminate_current_cmd.is_active = '1' for v_cmd.gen_integer_array(0) * vvc_config.clock_period;
end if;
when others =>
tb_error("Unsupported local command received for execution: '" & to_string(v_cmd.operation) & "'", C_SCOPE);
end case;
if v_command_is_bfm_access then
v_timestamp_end_of_last_bfm_access := now;
v_timestamp_start_of_last_bfm_access := v_timestamp_start_of_current_bfm_access;
if ((vvc_config.inter_bfm_delay.delay_type = TIME_START2START) and
((now - v_timestamp_start_of_current_bfm_access) > vvc_config.inter_bfm_delay.delay_in_time)) then
alert(vvc_config.inter_bfm_delay.inter_bfm_delay_violation_severity, "BFM access exceeded specified start-to-start inter-bfm delay, " &
to_string(vvc_config.inter_bfm_delay.delay_in_time) & ".", C_SCOPE);
end if;
end if;
-- Reset terminate flag if any occurred
if (terminate_current_cmd.is_active = '1') then
log(ID_CMD_EXECUTOR, "Termination request received", C_SCOPE, vvc_config.msg_id_panel);
uvvm_vvc_framework.ti_vvc_framework_support_pkg.reset_flag(terminate_current_cmd);
end if;
last_cmd_idx_executed <= v_cmd.cmd_idx;
-- Reset the transaction info for waveview
transaction_info := C_TRANSACTION_INFO_DEFAULT;
end loop;
end process;
--========================================================================================================================
--========================================================================================================================
-- Command termination handler
-- - Handles the termination request record (sets and resets terminate flag on request)
--========================================================================================================================
cmd_terminator : uvvm_vvc_framework.ti_vvc_framework_support_pkg.flag_handler(terminate_current_cmd); -- flag: is_active, set, reset
--========================================================================================================================
--========================================================================================================================
-- Clock Generator process
-- - Process that generates the clock signal
--========================================================================================================================
clock_generator : process
variable v_clock_period : time;
variable v_clock_high_time : time;
begin
wait for 0 ns; -- wait for clock_ena to be set
loop
-- Clock period is sampled so it won't change during a clock cycle and potentialy introduce negative time in
-- last wait statement
v_clock_period := clock_period;
v_clock_high_time := clock_high_time;
if v_clock_high_time >= v_clock_period then
tb_error(clock_name & ": clock period must be larger than clock high time; clock period: " & to_string(v_clock_period) & ", clock high time: " & to_string(clock_high_time), C_SCOPE);
end if;
if not clock_ena then
clk <= '0';
wait until clock_ena;
end if;
clk <= '1';
wait for v_clock_high_time;
clk <= '0';
wait for (v_clock_period - v_clock_high_time);
end loop;
end process;
--========================================================================================================================
end architecture behave;
|
--
-- Copyright (C) 2012 Chris McClelland
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU Lesser General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU Lesser General Public License for more details.
--
-- You should have received a copy of the GNU Lesser General Public License
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
--
--library verilog;
--use verilog.vl_types.all;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity sdram_model is
port(
-- SDRAM interface
ramClk_in : in std_logic;
ramCmd_in : in std_logic_vector(2 downto 0);
ramBank_in : in std_logic_vector(1 downto 0);
ramAddr_in : in std_logic_vector(11 downto 0);
ramData_io : inout std_logic_vector(15 downto 0)
);
end entity;
|
----------------------------------------------------------------------------------
-- Company:
-- Engineer:
--
-- Create Date: 17:52:01 04/27/2015
-- Design Name:
-- Module Name: UDP_1Gbe_Core - Behavioral
-- Project Name:
-- Target Devices:
-- Tool versions:
-- Description:
--
-- Dependencies:
--
-- Revision:
-- Revision 0.01 - File Created
-- Additional Comments:
--
----------------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
--use IEEE.NUMERIC_STD.ALL;
-- Uncomment the following library declaration if instantiating
-- any Xilinx primitives in this code.
library UNISIM;
use UNISIM.VComponents.all;
entity UDP_1GbE_if is
port(
GIGE_COL : in std_logic;
GIGE_CRS : in std_logic;
GIGE_MDC : out std_logic;
GIGE_MDIO : inout std_logic;
GIGE_TX_CLK : in std_logic;
GIGE_nRESET : out std_logic;
GIGE_RXD : in std_logic_vector( 7 downto 0 );
GIGE_RX_CLK : in std_logic;
GIGE_RX_DV : in std_logic;
GIGE_RX_ER : in std_logic;
GIGE_TXD : out std_logic_vector( 7 downto 0 );
GIGE_GTX_CLK : out std_logic;
GIGE_TX_EN : out std_logic;
GIGE_TX_ER : out std_logic;
sys_clk_p : in std_logic;
sys_clk_n : in std_logic;
sys_rst_i : in std_logic
);
end UDP_1GbE_if;
architecture Behavioral of UDP_1GbE_if is
---------------------------------------------------------------------------
-- Signal declaration section
---------------------------------------------------------------------------
attribute S: string;
attribute keep : string;
attribute S of GIGE_RXD : signal is "TRUE";
attribute S of GIGE_RX_DV : signal is "TRUE";
attribute S of GIGE_RX_ER : signal is "TRUE";
-- define constants
constant UDP_TX_DATA_BYTE_LENGTH : integer := 128;
constant UDP_RX_DATA_BYTE_LENGTH : integer := 37;
constant TX_DELAY : integer := 10;
-- system control
signal clk_125mhz : std_logic;
signal clk_100mhz : std_logic;
signal clk_25mhz : std_logic;
signal clk_6_25mhz : std_logic;
signal clk_3_125mhz : std_logic;
signal reset : std_logic;
-- MAC signals
signal udp_tx_pkt_data : std_logic_vector (8 * UDP_TX_DATA_BYTE_LENGTH - 1 downto 0);
signal udp_tx_pkt_vld : std_logic;
signal udp_tx_pkt_sent : std_logic;
signal udp_tx_pkt_vld_r : std_logic;
signal udp_tx_rdy : std_logic;
signal udp_rx_pkt_data : std_logic_vector(8 * UDP_RX_DATA_BYTE_LENGTH - 1 downto 0);
signal udp_rx_pkt_data_r: std_logic_vector(8 * UDP_RX_DATA_BYTE_LENGTH - 1 downto 0);
signal udp_rx_pkt_req : std_logic;
signal udp_rx_rdy : std_logic;
signal udp_rx_rdy_r : std_logic;
signal dst_mac_addr : std_logic_vector(47 downto 0);
signal tx_state : std_logic_vector(2 downto 0) := "000";
signal rx_state : std_logic_vector(2 downto 0) := "000";
signal locked : std_logic;
signal mac_init_done : std_logic;
signal GIGE_GTX_CLK_r : std_logic;
signal GIGE_MDC_r : std_logic;
signal tx_delay_cnt : integer := 0;
---------------------------------------------------------------------------
-- Component declaration section
---------------------------------------------------------------------------
component UDP_1GbE is
generic(
UDP_TX_DATA_BYTE_LENGTH : natural := 1;
UDP_RX_DATA_BYTE_LENGTH : natural:= 1
);
port(
-- user logic interface
own_ip_addr : in std_logic_vector (31 downto 0);
own_mac_addr : in std_logic_vector (47 downto 0);
dst_ip_addr : in std_logic_vector (31 downto 0);
dst_mac_addr : out std_logic_vector(47 downto 0);
udp_src_port : in std_logic_vector (15 downto 0);
udp_dst_port : in std_logic_vector (15 downto 0);
udp_tx_pkt_data : in std_logic_vector (8 * UDP_TX_DATA_BYTE_LENGTH - 1 downto 0);
udp_tx_pkt_vld : in std_logic;
udp_tx_rdy : out std_logic;
udp_rx_pkt_data : out std_logic_vector(8 * UDP_RX_DATA_BYTE_LENGTH - 1 downto 0);
udp_rx_pkt_req : in std_logic;
udp_rx_rdy : out std_logic;
mac_init_done : out std_logic;
udp_tx_clk_66mhz : out std_logic;
-- MAC interface
GIGE_COL : in std_logic;
GIGE_CRS : in std_logic;
GIGE_MDC : out std_logic;
GIGE_MDIO : inout std_logic;
GIGE_TX_CLK : in std_logic;
GIGE_nRESET : out std_logic;
GIGE_RXD : in std_logic_vector( 7 downto 0 );
GIGE_RX_CLK : in std_logic;
GIGE_RX_DV : in std_logic;
GIGE_RX_ER : in std_logic;
GIGE_TXD : out std_logic_vector( 7 downto 0 );
GIGE_GTX_CLK : out std_logic;
GIGE_TX_EN : out std_logic;
GIGE_TX_ER : out std_logic;
-- system control
sys_clk_p : in std_logic;
sys_clk_n : in std_logic;
sys_rst_i : in std_logic;
debug : out std_logic_vector(2 downto 0)
);
end component UDP_1GbE;
---------------------------------------------------------------------------
-- DUBUGGING SECTION
---------------------------------------------------------------------------
component icon
PORT (
CONTROL0 : INOUT STD_LOGIC_VECTOR(35 DOWNTO 0);
CONTROL1 : INOUT STD_LOGIC_VECTOR(35 DOWNTO 0));
end component;
component ila0
PORT (
CONTROL : INOUT STD_LOGIC_VECTOR(35 DOWNTO 0);
CLK : IN STD_LOGIC;
DATA : IN STD_LOGIC_VECTOR(299 DOWNTO 0);
TRIG0 : IN STD_LOGIC_VECTOR(7 DOWNTO 0));
end component;
component ila1
PORT (
CONTROL : INOUT STD_LOGIC_VECTOR(35 DOWNTO 0);
CLK : IN STD_LOGIC;
DATA : IN STD_LOGIC_VECTOR(63 DOWNTO 0);
TRIG0 : IN STD_LOGIC_VECTOR(7 DOWNTO 0));
end component;
signal control0 : std_logic_vector(35 downto 0);
signal control1 : std_logic_vector(35 downto 0);
signal ila_data0 : std_logic_vector(299 downto 0);
signal ila_data1 : std_logic_vector(63 downto 0);
signal trig0 : std_logic_vector(7 downto 0);
signal trig1 : std_logic_vector(7 downto 0);
---------------------------------------------------------------------------
-- END OF DUBUGGING SECTION
---------------------------------------------------------------------------
begin
UDP_1GbE_inst : UDP_1GbE
generic map(
UDP_TX_DATA_BYTE_LENGTH => UDP_TX_DATA_BYTE_LENGTH,
UDP_RX_DATA_BYTE_LENGTH => UDP_RX_DATA_BYTE_LENGTH
)
port map(
-- user logic interface
own_ip_addr => x"c0a80003",
own_mac_addr => x"0024ba7d1d70",
dst_ip_addr => x"c0a80001",
dst_mac_addr => dst_mac_addr,
udp_src_port => x"26CA", --9930
udp_dst_port => x"26CA",
udp_tx_pkt_data => udp_tx_pkt_data,
udp_tx_pkt_vld => udp_tx_pkt_vld,
udp_tx_rdy => udp_tx_rdy,
udp_rx_pkt_data => udp_rx_pkt_data,
udp_rx_pkt_req => udp_rx_pkt_req,
udp_rx_rdy => udp_rx_rdy,
mac_init_done => mac_init_done,
udp_tx_clk_66mhz => clk_100mhz,
-- MAC interface
GIGE_COL => GIGE_COL,
GIGE_CRS => GIGE_CRS,
GIGE_MDC => GIGE_MDC,
GIGE_MDIO => GIGE_MDIO,
GIGE_TX_CLK => GIGE_TX_CLK,
GIGE_nRESET => GIGE_nRESET,
GIGE_RXD => GIGE_RXD,
GIGE_RX_CLK => GIGE_RX_CLK,
GIGE_RX_DV => GIGE_RX_DV,
GIGE_RX_ER => GIGE_RX_ER,
GIGE_TXD => GIGE_TXD,
GIGE_GTX_CLK => GIGE_GTX_CLK,
GIGE_TX_EN => GIGE_TX_EN,
GIGE_TX_ER => GIGE_TX_ER,
-- system control
sys_clk_p => sys_clk_p,
sys_clk_n => sys_clk_n,
sys_rst_i => sys_rst_i
);
-----------------------------------------------------------------------
-- UDP TRANSMISSION SECTION
-----------------------------------------------------------------------
tx_proc : process(sys_rst_i,clk_100mhz)
begin
if(sys_rst_i = '1') then
elsif(rising_edge(clk_100mhz)) then
case tx_state is
when "000" =>
tx_delay_cnt <= 0;
if(udp_tx_rdy = '1') then
tx_state <= "001";
end if;
when "001" =>
if(udp_tx_rdy = '1') then
if(tx_delay_cnt = TX_DELAY) then
tx_delay_cnt <= 0;
udp_tx_pkt_vld_r <= '0';--'1';
udp_tx_pkt_data <= x"4833657a4769385670795139574134754e6563334e794d57685a4f5a346872697656315869796a71366a51463437525241333034734a72486567726f4d6f6c34486a4b4467696f484f6f67486d3073364b505348305a734f6a464a4b554d4e44775071416f526e4266366d50544c736c51736c78596b36335a584375666b3535";
else
udp_tx_pkt_vld_r <= '0';
tx_delay_cnt <= tx_delay_cnt + 1;
end if;
else
tx_state <= "000";
end if;
when others =>
null;
end case;
end if;
end process;
udp_tx_pkt_vld <= udp_tx_pkt_vld_r;
-----------------------------------------------------------------------
-- UDP RECEPTION SECTION
-----------------------------------------------------------------------
rx_proc : process(sys_rst_i,clk_100mhz)
begin
if(sys_rst_i = '1') then
elsif(rising_edge(clk_100mhz)) then
case rx_state is
when "000" =>
udp_rx_pkt_req <= '1';
udp_rx_rdy_r <= udp_rx_rdy;
rx_state <= "001";
when "001" =>
if(udp_rx_rdy = '1') then
udp_rx_pkt_data_r <= udp_rx_pkt_data;
udp_rx_rdy_r <= udp_rx_rdy;
rx_state <= "010";
end if;
when "010" =>
udp_rx_pkt_data_r <= (others => '0');
rx_state <= "000";
udp_rx_rdy_r <= udp_rx_rdy;
when others =>
null;
end case;
end if;
end process;
-----------------------------------------------------------------------
-- DEBUGGING SECTION
-----------------------------------------------------------------------
-- icon_inst : icon
-- port map (
-- CONTROL0 => CONTROL0,
-- CONTROL1 => CONTROL1);
-- ila0_inst : ila0
-- port map (
-- CONTROL => CONTROL0,
-- CLK => clk_100mhz,
-- DATA => ila_data0,
-- TRIG0 => TRIG0);
-- ila1_inst : ila1
-- port map (
-- CONTROL => CONTROL1,
-- CLK => clk_125mhz,
-- DATA => ila_data1,
-- TRIG0 => TRIG1);
-- ila_data0(0) <= udp_rx_rdy_r;
-- ila_data0(1) <= udp_rx_pkt_req;
-- ila_data0(297 downto 2) <= udp_rx_pkt_data_r;
-- trig0(0) <= udp_rx_rdy;
end Behavioral;
|
LIBRARY ieee;
USE ieee.std_logic_1164.all;
package float_types is
subtype float is std_logic_vector(31 downto 0);
type float_vector is array( NATURAL range <> ) of float;
type float_alu_mode is ( idle, add, sub, mul, div, exp);
end package float_types;
LIBRARY ieee;
USE ieee.std_logic_1164.all;
USE work.float_types.all;
package float_constants is
-- whole number constants
CONSTANT float_zero : float := "00000000000000000000000000000000";
CONSTANT float_one : float := "00111111100000000000000000000000";
-- other constants
CONSTANT float_half : float := "00111111000000000000000000000000";
CONSTANT float_1_10 : float := "00111101110011001100110011001100";
CONSTANT float_1_20 : float := "00111101010011001100110011001101";
CONSTANT float_1_100 : float := "00111100001000111101011100001010";
CONSTANT float_add_wait : INTEGER := 7;
CONSTANT float_sub_wait : INTEGER := 7;
CONSTANT float_div_wait : INTEGER := 6;
CONSTANT float_mul_wait : INTEGER := 11;
CONSTANT float_exp_wait : INTEGER := 17;
CONSTANT float_cmp_wait : INTEGER := 1;
end package float_constants;
LIBRARY ieee;
USE ieee.std_logic_1164.all;
USE work.float_types.all;
package float_components is
component fp_add
PORT
(
aclr : IN STD_LOGIC ;
clk_en : IN STD_LOGIC ;
clock : IN STD_LOGIC ;
dataa : IN STD_LOGIC_VECTOR (31 DOWNTO 0);
datab : IN STD_LOGIC_VECTOR (31 DOWNTO 0);
result : OUT STD_LOGIC_VECTOR (31 DOWNTO 0)
);
end component;
component fp_cmp
PORT
(
aclr : IN STD_LOGIC ;
clk_en : IN STD_LOGIC ;
clock : IN STD_LOGIC ;
dataa : IN STD_LOGIC_VECTOR (31 DOWNTO 0);
datab : IN STD_LOGIC_VECTOR (31 DOWNTO 0);
agb : OUT STD_LOGIC
);
end component;
component fp_div
PORT
(
aclr : IN STD_LOGIC ;
clk_en : IN STD_LOGIC ;
clock : IN STD_LOGIC ;
dataa : IN STD_LOGIC_VECTOR (31 DOWNTO 0);
datab : IN STD_LOGIC_VECTOR (31 DOWNTO 0);
result : OUT STD_LOGIC_VECTOR (31 DOWNTO 0)
);
end component;
component fp_exp
PORT
(
aclr : IN STD_LOGIC ;
clk_en : IN STD_LOGIC ;
clock : IN STD_LOGIC ;
data : IN STD_LOGIC_VECTOR (31 DOWNTO 0);
result : OUT STD_LOGIC_VECTOR (31 DOWNTO 0)
);
end component;
component fp_mul
PORT
(
aclr : IN STD_LOGIC ;
clk_en : IN STD_LOGIC ;
clock : IN STD_LOGIC ;
dataa : IN STD_LOGIC_VECTOR (31 DOWNTO 0);
datab : IN STD_LOGIC_VECTOR (31 DOWNTO 0);
result : OUT STD_LOGIC_VECTOR (31 DOWNTO 0)
);
end component;
component fp_sub
PORT
(
aclr : IN STD_LOGIC ;
clk_en : IN STD_LOGIC ;
clock : IN STD_LOGIC ;
dataa : IN STD_LOGIC_VECTOR (31 DOWNTO 0);
datab : IN STD_LOGIC_VECTOR (31 DOWNTO 0);
result : OUT STD_LOGIC_VECTOR (31 DOWNTO 0)
);
end component;
component float_alu IS
PORT (
reset, clock : IN STD_LOGIC;
a, b : IN float;
c : OUT float;
mode : IN float_alu_mode;
ready : OUT STD_LOGIC
);
end component float_alu;
end package float_components;
LIBRARY ieee;
USE ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
USE work.float_types.all;
USE work.float_components.all;
USE work.float_constants.all;
ENTITY float_alu IS
PORT (
reset, clock : IN STD_LOGIC;
a, b : IN float;
c : OUT float;
mode : IN float_alu_mode;
ready : OUT STD_LOGIC
);
END ENTITY float_alu;
ARCHITECTURE float_alu OF float_alu IS
-- wait counter
SIGNAL wait_counter : INTEGER := 0;
-- alu signals
SIGNAL add_enable, sub_enable, mul_enable, div_enable, exp_enable : STD_LOGIC := '0';
SIGNAL alu_a, alu_b, alu_c, add_c, sub_c, mul_c, div_c, exp_c : float := float_zero;
TYPE states IS (idle, add, sub, mul, div, exp);
SIGNAL state : states := idle;
BEGIN
c <= alu_c;
-- alu stuff
fp_add0 : fp_add port map (reset, add_enable, clock, alu_a, alu_b, add_c);
fp_sub0 : fp_sub port map (reset, sub_enable, clock, alu_a, alu_b, sub_c);
fp_mul0 : fp_mul port map (reset, mul_enable, clock, alu_a, alu_b, mul_c);
fp_div0 : fp_div port map (reset, div_enable, clock, alu_a, alu_b, div_c);
fp_exp0 : fp_exp port map (reset, exp_enable, clock, alu_a, exp_c);
fsm: PROCESS(clock, reset) IS
BEGIN
IF (reset = '1') THEN
wait_counter <= 0;
state <= idle;
ready <= '0';
ELSIF (clock = '1' AND clock'event) THEN
IF (wait_counter > 0) THEN
wait_counter <= wait_counter - 1;
ELSE
CASE state IS
WHEN idle =>
CASE mode IS
WHEN idle =>
ready <= '1';
state <= idle;
WHEN add =>
ready <= '0';
add_enable <= '1';
alu_a <= a;
alu_b <= b;
wait_counter <= float_add_wait;
state <= add;
WHEN sub =>
ready <= '0';
sub_enable <= '1';
alu_a <= a;
alu_b <= b;
wait_counter <= float_sub_wait;
state <= sub;
WHEN mul =>
ready <= '0';
mul_enable <= '1';
alu_a <= a;
alu_b <= b;
wait_counter <= float_mul_wait;
state <= mul;
WHEN div =>
ready <= '0';
div_enable <= '1';
alu_a <= a;
alu_b <= b;
wait_counter <= float_div_wait;
state <= div;
WHEN exp =>
ready <= '0';
exp_enable <= '1';
alu_a <= a;
wait_counter <= float_exp_wait;
state <= exp;
WHEN others =>
state <= idle;
END CASE;
WHEN add =>
alu_c <= add_c;
add_enable <= '0';
state <= idle;
ready <= '1';
WHEN sub =>
alu_c <= sub_c;
sub_enable <= '0';
state <= idle;
ready <= '1';
WHEN mul =>
alu_c <= mul_c;
mul_enable <= '0';
state <= idle;
ready <= '1';
WHEN div =>
alu_c <= div_c;
div_enable <= '0';
state <= idle;
ready <= '1';
WHEN exp =>
alu_c <= exp_c;
exp_enable <= '0';
state <= idle;
ready <= '1';
WHEN others =>
state <= idle;
END CASE;
END IF;
END IF;
END PROCESS;
END ARCHITECTURE float_alu;
|
--================================================================================================================================
-- Copyright 2020 Bitvis
-- Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 and in the provided LICENSE.TXT.
--
-- Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
-- an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and limitations under the License.
--================================================================================================================================
-- Note : Any functionality not explicitly described in the documentation is subject to change at any time
----------------------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------
-- Description : See library quick reference (under 'doc') and README-file(s)
---------------------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
library uvvm_util;
context uvvm_util.uvvm_util_context;
library uvvm_vvc_framework;
use uvvm_vvc_framework.ti_vvc_framework_support_pkg.all;
use work.support_pkg.all;
use work.transaction_pkg.all;
--==========================================================================================
--==========================================================================================
package vvc_cmd_pkg is
alias t_operation is work.transaction_pkg.t_operation;
--==========================================================================================
-- t_vvc_cmd_record
-- - Record type used for communication with the VVC
--==========================================================================================
type t_vvc_cmd_record is record
-- VVC dedicated fields
mac_destination : unsigned(47 downto 0);
mac_source : unsigned(47 downto 0);
payload_length : natural range 0 to C_MAX_PAYLOAD_LENGTH;
payload : t_byte_array(0 to C_MAX_PAYLOAD_LENGTH-1);
-- Common VVC fields
operation : t_operation;
proc_call : string(1 to C_VVC_CMD_STRING_MAX_LENGTH);
msg : string(1 to C_VVC_CMD_STRING_MAX_LENGTH);
data_routing : t_data_routing;
cmd_idx : natural;
command_type : t_immediate_or_queued;
msg_id : t_msg_id;
gen_integer_array : t_integer_array(0 to 1); -- Increase array length if needed
gen_boolean : boolean; -- Generic boolean
timeout : time;
alert_level : t_alert_level;
delay : time;
quietness : t_quietness;
parent_msg_id_panel : t_msg_id_panel;
end record;
constant C_VVC_CMD_DEFAULT : t_vvc_cmd_record := (
-- VVC dedicated fields
mac_destination => (others => '0'),
mac_source => (others => '0'),
payload_length => 0,
payload => (others => (others => '0')),
-- Common VVC fields
operation => NO_OPERATION,
proc_call => (others => NUL),
msg => (others => NUL),
data_routing => NA,
cmd_idx => 0,
command_type => NO_COMMAND_TYPE,
msg_id => NO_ID,
gen_integer_array => (others => -1),
gen_boolean => false,
timeout => 0 ns,
alert_level => FAILURE,
delay => 0 ns,
quietness => NON_QUIET,
parent_msg_id_panel => C_UNUSED_MSG_ID_PANEL
);
--==========================================================================================
-- shared_vvc_cmd
-- - Shared variable used for transmitting VVC commands
--==========================================================================================
shared variable shared_vvc_cmd : t_vvc_cmd_record := C_VVC_CMD_DEFAULT;
--==========================================================================================
-- t_vvc_result, t_vvc_result_queue_element, t_vvc_response and shared_vvc_response :
--
-- - Used for storing the result of a BFM procedure called by the VVC,
-- so that the result can be transported from the VVC to for example a sequencer via
-- fetch_result() as described in uvvm_vvc_framework/Common_VVC_Methods QuickRef.
-- - t_vvc_result includes the return value of the procedure in the BFM. It can also
-- be defined as a record if multiple values shall be transported from the BFM
--==========================================================================================
type t_vvc_result is record
ethernet_frame : t_ethernet_frame;
ethernet_frame_status : t_ethernet_frame_status;
end record t_vvc_result;
type t_vvc_result_queue_element is record
cmd_idx : natural; -- from UVVM handshake mechanism
result : t_vvc_result;
end record;
type t_vvc_response is record
fetch_is_accepted : boolean;
transaction_result : t_transaction_result;
result : t_vvc_result;
end record;
shared variable shared_vvc_response : t_vvc_response;
--==========================================================================================
-- t_last_received_cmd_idx :
-- - Used to store the last queued cmd in VVC interpreter.
--==========================================================================================
type t_last_received_cmd_idx is array (t_channel range <>,natural range <>) of integer;
--==========================================================================================
-- shared_vvc_last_received_cmd_idx
-- - Shared variable used to get last queued index from VVC to sequencer
--==========================================================================================
shared variable shared_vvc_last_received_cmd_idx : t_last_received_cmd_idx(t_channel'left to t_channel'right, 0 to C_MAX_VVC_INSTANCE_NUM-1) := (others => (others => -1));
--==========================================================================================
-- Procedures
--==========================================================================================
function to_string(
result : t_vvc_result
) return string;
end package vvc_cmd_pkg;
package body vvc_cmd_pkg is
-- Custom to_string overload needed when result is of a record type
function to_string(
result : t_vvc_result
) return string is
begin
return to_string(result.ethernet_frame, HEADER) &
LF & " FCS error: " & to_string(result.ethernet_frame_status.fcs_error);
end;
end package body vvc_cmd_pkg; |
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
library UNISIM;
use UNISIM.Vcomponents.all;
entity DCMSID1 is
port (CLKIN_IN : in std_logic;
CLK0_OUT : out std_logic;
CLK0_OUT1 : out std_logic;
CLK2X_OUT : out std_logic);
end DCMSID1;
architecture BEHAVIORAL of DCMSID1 is
signal CLKFX_BUF : std_logic;
signal CLKIN_IBUFG : std_logic;
signal GND_BIT : std_logic;
begin
GND_BIT <= '0';
CLKFX_BUFG_INST : BUFG
port map (I => CLKFX_BUF, O => CLK0_OUT);
DCM_INST : DCM
generic map(CLK_FEEDBACK => "NONE",
CLKDV_DIVIDE => 4.0,
CLKFX_DIVIDE => 12,
CLKFX_MULTIPLY => 25,
CLKIN_DIVIDE_BY_2 => false,
CLKIN_PERIOD => 65.1,
CLKOUT_PHASE_SHIFT => "NONE",
DESKEW_ADJUST => "SYSTEM_SYNCHRONOUS",
DFS_FREQUENCY_MODE => "LOW",
DLL_FREQUENCY_MODE => "LOW",
DUTY_CYCLE_CORRECTION => true,
FACTORY_JF => x"C080",
PHASE_SHIFT => 0,
STARTUP_WAIT => false)
port map (CLKFB => GND_BIT,
CLKIN => CLKIN_IN,
DSSEN => GND_BIT,
PSCLK => GND_BIT,
PSEN => GND_BIT,
PSINCDEC => GND_BIT,
RST => GND_BIT,
CLKDV => open,
CLKFX => CLKFX_BUF,
CLKFX180 => open,
CLK0 => open,
CLK2X => CLK2X_OUT,
CLK2X180 => open,
CLK90 => open,
CLK180 => open,
CLK270 => open,
LOCKED => open,
PSDONE => open,
STATUS => open);
end BEHAVIORAL;
|
library ieee;
use ieee.std_logic_1164.all;
use work.graphics_types_pkg.all;
use work.game_state_pkg.all;
use work.npc_pkg.all;
-- "Artifical intelligence" (for lack of a better name) for moving NPCs
-- (non-player characters, such as enemies) around the screen. The "follower"
-- strategy consists in moving the NPC in the direction of a given point on
-- the screen, which may be variable.
entity npc_ai_follower is
port (
reset, clock: in std_logic;
-- time base pulse, NPC state gets updated when high (tipically every 100 ms)
time_base: in std_logic;
-- true if NPC is active in the game and must be updated
enabled: in boolean;
-- limits for NPC movement
allowed_region: in rectangle_type;
-- starting point for the NPC
initial_position: in point_type;
-- start velocity for the NPC
absolute_speed: in integer range 0 to NPC_SPEED_MAX;
slowdown_factor: in integer range 0 to NPC_SPEED_MAX;
-- goal position, NPC moves towards this point
assigned_position: in point_type;
-- calculated NPC position
npc_position: out point_type
);
end;
architecture rtl of npc_ai_follower is
-- current NPC position
signal position: point_type;
signal slowdown_counter: integer range 0 to NPC_SPEED_MAX;
signal scaled_time_base: std_logic;
begin
process (clock, reset) begin
if reset then
slowdown_counter <= 0;
scaled_time_base <= '0';
elsif rising_edge(clock) then
scaled_time_base <= '0';
if time_base = '1' then
if slowdown_counter < slowdown_factor then
slowdown_counter <= slowdown_counter + 1;
else
slowdown_counter <= 0;
scaled_time_base <= '1';
end if;
end if;
end if;
end process;
process (clock, reset, initial_position) is
variable new_position: point_type;
begin
if reset then
position <= initial_position;
elsif rising_edge(clock) then
-- if scaled_time_base then
if enabled and scaled_time_base = '1' then
if position.x < assigned_position.x then
new_position.x := position.x + absolute_speed;
elsif position.x > assigned_position.x then
new_position.x := position.x - absolute_speed;
end if;
if new_position.y < assigned_position.y then
new_position.y := position.y + absolute_speed;
elsif new_position.y > assigned_position.y then
new_position.y := position.y - absolute_speed;
end if;
-- make sure x position is within limits; invert horizontal speed
-- when NPC touches an edge
if new_position.x < allowed_region.left then
new_position.x := allowed_region.left;
elsif new_position.x > allowed_region.right then
new_position.x := allowed_region.right;
end if;
-- make sure y position is within limits
if new_position.y < allowed_region.top then
new_position.y := allowed_region.top;
elsif new_position.y > allowed_region.bottom then
new_position.y := allowed_region.bottom;
end if;
position <= new_position;
end if;
end if;
end process;
npc_position <= position;
end;
|
-- $Id: rlinklib.vhd 442 2011-12-23 10:03:28Z mueller $
--
-- Copyright 2007-2011 by Walter F.J. Mueller <[email protected]>
--
-- This program is free software; you may redistribute and/or modify it under
-- the terms of the GNU General Public License as published by the Free
-- Software Foundation, either version 2, or at your option any later version.
--
-- This program is distributed in the hope that it will be useful, but
-- WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for complete details.
--
------------------------------------------------------------------------------
-- Package Name: rlinklib
-- Description: Definitions for rlink interface and bus entities
--
-- Dependencies: -
-- Tool versions: xst 8.2, 9.1, 9.2, 11.4, 12.1, 13.1; ghdl 0.18-0.29
--
-- Revision History:
-- Date Rev Version Comment
-- 2011-12-21 442 3.2.1 retire old, deprecated interfaces
-- 2011-12-09 437 3.2 add rlink_core8
-- 2011-11-18 427 3.1.3 now numeric_std clean
-- 2010-12-25 348 3.1.2 drop RL_FLUSH support, add RL_MONI for rlink_core;
-- new rlink_serport interface;
-- rename rlink_core_serport->rlink_base_serport
-- 2010-12-24 347 3.1.1 rename: CP_*->RL->*
-- 2010-12-22 346 3.1 rename: [cd]crc->[cd]err, ioto->rbnak, ioerr->rberr
-- 2010-12-04 343 3.0 move rbus components to rbus/rblib; renames
-- rri_ -> rlink and c_rri -> c_rlink;
-- 2010-06-18 306 2.5.1 rename rbus data fields to _rbf_
-- 2010-06-06 302 2.5 use sop/eop framing instead of soc+chaining
-- 2010-06-03 300 2.1.5 use FAWIDTH=5 for rri_serport
-- 2010-05-02 287 2.1.4 ren CE_XSEC->CE_INT,RP_STAT->RB_STAT,AP_LAM->RB_LAM
-- drop RP_IINT from interfaces; drop RTSFLUSH generic
-- 2010-05-01 285 2.1.3 remove rri_rb_rpcompat, now obsolete
-- 2010-04-18 279 2.1.2 rri_core_serport: drop RTSFBUF generic
-- 2010-04-10 275 2.1.1 add rri_core_serport
-- 2010-04-03 274 2.1 add CP_FLUSH for rri_core, rri_serport;
-- CE_USEC, RTSFLUSH, CTS_N, RTS_N for rri_serport
-- 2008-08-24 162 2.0 all with new rb_mreq/rb_sres interface
-- 2008-08-22 161 1.3 renamed rri_rbres_ -> rb_sres_; drop rri_[24]rp
-- 2008-02-16 116 1.2.1 added rri_wreg(rw|w|r)_3
-- 2008-01-20 113 1.2 added rb_[mreq|sres]; _rbres_or_*; _rb_rpcompat
-- 2007-11-24 98 1.1 added RP_IINT for rri_core.
-- 2007-09-09 81 1.0 Initial version
------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use work.slvtypes.all;
use work.rblib.all;
use work.serport.all;
package rlinklib is
constant c_rlink_cpref : slv4 := "1000"; -- default comma prefix
constant c_rlink_ncomm : positive := 4; -- number commas (sop,eop,nak,attn)
constant c_rlink_dat_idle : slv9 := "100000000";
constant c_rlink_dat_sop : slv9 := "100000001";
constant c_rlink_dat_eop : slv9 := "100000010";
constant c_rlink_dat_nak : slv9 := "100000011";
constant c_rlink_dat_attn : slv9 := "100000100";
constant c_rlink_cmd_rreg : slv3 := "000";
constant c_rlink_cmd_rblk : slv3 := "001";
constant c_rlink_cmd_wreg : slv3 := "010";
constant c_rlink_cmd_wblk : slv3 := "011";
constant c_rlink_cmd_stat : slv3 := "100";
constant c_rlink_cmd_attn : slv3 := "101";
constant c_rlink_cmd_init : slv3 := "110";
constant c_rlink_iint_rbf_anena: integer := 15; -- anena flag
constant c_rlink_iint_rbf_itoena: integer := 14; -- itoena flag
subtype c_rlink_iint_rbf_itoval is integer range 7 downto 0; -- command code
subtype c_rlink_cmd_rbf_seq is integer range 7 downto 3; -- sequence number
subtype c_rlink_cmd_rbf_code is integer range 2 downto 0; -- command code
subtype c_rlink_stat_rbf_stat is integer range 7 downto 5; -- ext status bits
constant c_rlink_stat_rbf_attn: integer := 4; -- attention flags set
constant c_rlink_stat_rbf_cerr: integer := 3; -- command error
constant c_rlink_stat_rbf_derr: integer := 2; -- data error
constant c_rlink_stat_rbf_rbnak: integer := 1; -- rbus no ack or timeout
constant c_rlink_stat_rbf_rberr: integer := 0; -- rbus err bit set
type rl_moni_type is record -- rlink_core monitor port
eop : slbit; -- eop send in last cycle
attn : slbit; -- attn send in last cycle
lamp : slbit; -- attn (lam) pending
end record rl_moni_type;
constant rl_moni_init : rl_moni_type :=
('0','0','0'); -- eop,attn,lamp
-- ise 13.1 xst can bug check if generic defaults in a package are defined via
-- 'slv(to_unsigned())'. The conv_ construct prior to numeric_std was ok.
-- As workaround the ibus default addresses are defined here as constant.
constant rbaddr_rlink_serport : slv8 := slv(to_unsigned(2#11111110#,8));
-- this definition logically belongs into the 'for test benches' section'
-- must be here because it is needed as generic default in rlink_core8
-- simbus sb_cntl field usage for rlink
constant sbcntl_sbf_rlmon : integer := 15;
component rlink_core is -- rlink core with 9bit iface
generic (
ATOWIDTH : positive := 5; -- access timeout counter width
ITOWIDTH : positive := 6); -- idle timeout counter width
port (
CLK : in slbit; -- clock
CE_INT : in slbit := '0'; -- rlink ito time unit clock enable
RESET : in slbit; -- reset
RL_DI : in slv9; -- rlink 9b: data in
RL_ENA : in slbit; -- rlink 9b: data enable
RL_BUSY : out slbit; -- rlink 9b: data busy
RL_DO : out slv9; -- rlink 9b: data out
RL_VAL : out slbit; -- rlink 9b: data valid
RL_HOLD : in slbit; -- rlink 9b: data hold
RL_MONI : out rl_moni_type; -- rlink: monitor port
RB_MREQ : out rb_mreq_type; -- rbus: request
RB_SRES : in rb_sres_type; -- rbus: response
RB_LAM : in slv16; -- rbus: look at me
RB_STAT : in slv3 -- rbus: status flags
);
end component;
component rlink_aif is -- rlink, abstract interface
port (
CLK : in slbit; -- clock
CE_INT : in slbit := '0'; -- rlink ito time unit clock enable
RESET : in slbit :='0'; -- reset
RL_DI : in slv9; -- rlink 9b: data in
RL_ENA : in slbit; -- rlink 9b: data enable
RL_BUSY : out slbit; -- rlink 9b: data busy
RL_DO : out slv9; -- rlink 9b: data out
RL_VAL : out slbit; -- rlink 9b: data valid
RL_HOLD : in slbit := '0' -- rlink 9b: data hold
);
end component;
component rlink_core8 is -- rlink core with 8bit iface
generic (
ATOWIDTH : positive := 5; -- access timeout counter width
ITOWIDTH : positive := 6; -- idle timeout counter width
CPREF : slv4 := c_rlink_cpref; -- comma prefix
ENAPIN_RLMON : integer := sbcntl_sbf_rlmon; -- SB_CNTL for rlmon (-1=none)
ENAPIN_RBMON : integer := sbcntl_sbf_rbmon); -- SB_CNTL for rbmon (-1=none)
port (
CLK : in slbit; -- clock
CE_INT : in slbit := '0'; -- rlink ito time unit clock enable
RESET : in slbit; -- reset
RLB_DI : in slv8; -- rlink 8b: data in
RLB_ENA : in slbit; -- rlink 8b: data enable
RLB_BUSY : out slbit; -- rlink 8b: data busy
RLB_DO : out slv8; -- rlink 8b: data out
RLB_VAL : out slbit; -- rlink 8b: data valid
RLB_HOLD : in slbit; -- rlink 8b: data hold
RL_MONI : out rl_moni_type; -- rlink: monitor port
RB_MREQ : out rb_mreq_type; -- rbus: request
RB_SRES : in rb_sres_type; -- rbus: response
RB_LAM : in slv16; -- rbus: look at me
RB_STAT : in slv3 -- rbus: status flags
);
end component;
--
-- core + concrete_interface combo's
--
component rlink_sp1c is -- rlink_core8+serport_1clock combo
generic (
ATOWIDTH : positive := 5; -- access timeout counter width
ITOWIDTH : positive := 6; -- idle timeout counter width
CPREF : slv4 := c_rlink_cpref; -- comma prefix
IFAWIDTH : natural := 5; -- input fifo address width (0=none)
OFAWIDTH : natural := 5; -- output fifo address width (0=none)
ENAPIN_RLMON : integer := sbcntl_sbf_rlmon; -- SB_CNTL for rlmon (-1=none)
ENAPIN_RBMON : integer := sbcntl_sbf_rbmon; -- SB_CNTL for rbmon (-1=none)
CDWIDTH : positive := 13; -- clk divider width
CDINIT : natural := 15); -- clk divider initial/reset setting
port (
CLK : in slbit; -- clock
CE_USEC : in slbit; -- 1 usec clock enable
CE_MSEC : in slbit; -- 1 msec clock enable
CE_INT : in slbit := '0'; -- rri ito time unit clock enable
RESET : in slbit; -- reset
ENAXON : in slbit; -- enable xon/xoff handling
ENAESC : in slbit; -- enable xon/xoff escaping
RXSD : in slbit; -- receive serial data (board view)
TXSD : out slbit; -- transmit serial data (board view)
CTS_N : in slbit := '0'; -- clear to send (act.low, board view)
RTS_N : out slbit; -- request to send (act.low, board view)
RB_MREQ : out rb_mreq_type; -- rbus: request
RB_SRES : in rb_sres_type; -- rbus: response
RB_LAM : in slv16; -- rbus: look at me
RB_STAT : in slv3; -- rbus: status flags
RL_MONI : out rl_moni_type; -- rlink_core: monitor port
SER_MONI : out serport_moni_type -- serport: monitor port
);
end component;
--
-- components for use in test benches (not synthesizable)
--
component rlink_mon is -- rlink monitor
generic (
DWIDTH : positive := 9); -- data port width (8 or 9)
port (
CLK : in slbit; -- clock
CLK_CYCLE : in slv31 := (others=>'0'); -- clock cycle number
ENA : in slbit := '1'; -- enable monitor output
RL_DI : in slv(DWIDTH-1 downto 0); -- rlink: data in
RL_ENA : in slbit; -- rlink: data enable
RL_BUSY : in slbit; -- rlink: data busy
RL_DO : in slv(DWIDTH-1 downto 0); -- rlink: data out
RL_VAL : in slbit; -- rlink: data valid
RL_HOLD : in slbit -- rlink: data hold
);
end component;
component rlink_mon_sb is -- simbus wrap for rlink monitor
generic (
DWIDTH : positive := 9; -- data port width (8 or 9)
ENAPIN : integer := sbcntl_sbf_rlmon); -- SB_CNTL signal to use for enable
port (
CLK : in slbit; -- clock
RL_DI : in slv(DWIDTH-1 downto 0); -- rlink: data in
RL_ENA : in slbit; -- rlink: data enable
RL_BUSY : in slbit; -- rlink: data busy
RL_DO : in slv(DWIDTH-1 downto 0); -- rlink: data out
RL_VAL : in slbit; -- rlink: data valid
RL_HOLD : in slbit -- rlink: data hold
);
end component;
end package rlinklib;
|
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;
entity memory is
generic(N: integer := 7; M: integer := 32);
port(
clk: in STD_LOGIC := '0';
we: in STD_LOGIC := '0';
adr: in STD_LOGIC_VECTOR(N-1 downto 0) := (others => '0');
din: in STD_LOGIC_VECTOR(M-1 downto 0) := (others => '0');
dout: out STD_LOGIC_VECTOR(M-1 downto 0)
);
end;
architecture memory_arch of memory is
type mem_array is array(0 to (2**N-1)) of STD_LOGIC_VECTOR(M-1 downto 0);
signal mem: mem_array := (
x"abababab",
x"efefefef",
x"02146545",
x"85781546",
x"69782314",
x"25459789",
x"245a65c5",
x"ac5b4b5b",
x"ebebebeb",
x"cacacaca",
x"ecececec",
x"facfcafc",
x"ecaecaaa",
x"dadadeac",
others => (others => '1')
);
begin
process(clk) begin
if clk'event and clk='1' then
if we='1' then
mem(to_integer(unsigned(adr))) <= din;
end if;
end if;
end process;
dout <= mem(to_integer(unsigned(adr)));
end; |
-- Copyright 1986-2016 Xilinx, Inc. All Rights Reserved.
-- --------------------------------------------------------------------------------
-- Tool Version: Vivado v.2016.4 (win64) Build 1733598 Wed Dec 14 22:35:39 MST 2016
-- Date : Mon May 29 20:15:21 2017
-- Host : GILAMONSTER running 64-bit major release (build 9200)
-- Command : write_vhdl -force -mode synth_stub -rename_top system_buffer_register_0_0 -prefix
-- system_buffer_register_0_0_ system_buffer_register_0_0_stub.vhdl
-- Design : system_buffer_register_0_0
-- Purpose : Stub declaration of top-level module interface
-- Device : xc7z020clg484-1
-- --------------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
entity system_buffer_register_0_0 is
Port (
clk : in STD_LOGIC;
val_in : in STD_LOGIC_VECTOR ( 31 downto 0 );
val_out : out STD_LOGIC_VECTOR ( 31 downto 0 )
);
end system_buffer_register_0_0;
architecture stub of system_buffer_register_0_0 is
attribute syn_black_box : boolean;
attribute black_box_pad_pin : string;
attribute syn_black_box of stub : architecture is true;
attribute black_box_pad_pin of stub : architecture is "clk,val_in[31:0],val_out[31:0]";
attribute x_core_info : string;
attribute x_core_info of stub : architecture is "buffer_register,Vivado 2016.4";
begin
end;
|
--Copyright (C) 2016 Siavoosh Payandeh Azad Behrad Niazmand
library ieee;
use ieee.std_logic_1164.all;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity allocator_credit_counter_logic_pseudo_checkers is
port (
-- flow control
credit_in_N, credit_in_E, credit_in_W, credit_in_S, credit_in_L: in std_logic;
credit_counter_N_out, credit_counter_E_out, credit_counter_W_out, credit_counter_S_out, credit_counter_L_out : in std_logic_vector(1 downto 0);
valid_N, valid_E, valid_W, valid_S, valid_L: in std_logic; -- ?? Not sure yet ! grant or valid !
credit_counter_N_in, credit_counter_E_in, credit_counter_W_in, credit_counter_S_in, credit_counter_L_in : in std_logic_vector(1 downto 0);
-- Checker outputs
err_credit_in_N_grant_N_credit_counter_N_in_credit_counter_N_out_equal,
err_credit_in_N_credit_counter_N_out_increment,
err_not_credit_in_N_credit_counter_N_out_max_credit_counter_N_in_not_change,
err_grant_N_credit_counter_N_out_decrement,
err_not_grant_N_or_credit_counter_N_out_zero_credit_counter_N_in_not_change,
err_not_credit_in_N_not_grant_N_credit_counter_N_in_credit_counter_N_out_equal,
err_credit_in_E_grant_E_credit_counter_E_in_credit_counter_E_out_equal,
err_credit_in_E_credit_counter_E_out_increment,
err_not_credit_in_E_credit_counter_E_out_max_credit_counter_E_in_not_change,
err_grant_E_credit_counter_E_out_decrement,
err_not_grant_E_or_credit_counter_E_out_zero_credit_counter_E_in_not_change,
err_not_credit_in_E_not_grant_E_credit_counter_E_in_credit_counter_E_out_equal,
err_credit_in_W_grant_W_credit_counter_W_in_credit_counter_W_out_equal,
err_credit_in_W_credit_counter_W_out_increment,
err_not_credit_in_W_credit_counter_W_out_max_credit_counter_W_in_not_change,
err_grant_W_credit_counter_W_out_decrement,
err_not_grant_W_or_credit_counter_W_out_zero_credit_counter_W_in_not_change,
err_not_credit_in_W_not_grant_W_credit_counter_W_in_credit_counter_W_out_equal,
err_credit_in_S_grant_S_credit_counter_S_in_credit_counter_S_out_equal,
err_credit_in_S_credit_counter_S_out_increment,
err_not_credit_in_S_credit_counter_S_out_max_credit_counter_S_in_not_change,
err_grant_S_credit_counter_S_out_decrement,
err_not_grant_S_or_credit_counter_S_out_zero_credit_counter_S_in_not_change,
err_not_credit_in_S_not_grant_S_credit_counter_S_in_credit_counter_S_out_equal,
err_credit_in_L_grant_L_credit_counter_L_in_credit_counter_L_out_equal,
err_credit_in_L_credit_counter_L_out_increment,
err_not_credit_in_L_credit_counter_L_out_max_credit_counter_L_in_not_change,
err_grant_L_credit_counter_L_out_decrement,
err_not_grant_L_or_credit_counter_L_out_zero_credit_counter_L_in_not_change,
err_not_credit_in_L_not_grant_L_credit_counter_L_in_credit_counter_L_out_equal : out std_logic
);
end allocator_credit_counter_logic_pseudo_checkers;
architecture behavior of allocator_credit_counter_logic_pseudo_checkers is
begin
-- The combionational part
----------------------------------------------------------------
-- Checkers for the process handling the credit counters
-- North credit counter
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '1' and valid_N = '1' and credit_counter_N_in /= credit_counter_N_out) then
err_credit_in_N_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '1';
else
err_credit_in_N_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '0';
end if;
end process;
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '1' and valid_N = '1' and credit_counter_N_out < 3 and credit_counter_N_in /= credit_counter_N_out + 1) then
err_credit_in_N_credit_counter_N_out_increment <= '1';
else
err_credit_in_N_credit_counter_N_out_increment <= '0';
end if;
end process;
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '1' and valid_N = '0' and credit_counter_N_out = 3 and credit_counter_N_in /= credit_counter_N_out) then
err_not_credit_in_N_credit_counter_N_out_max_credit_counter_N_in_not_change <= '1';
else
err_not_credit_in_N_credit_counter_N_out_max_credit_counter_N_in_not_change <= '0';
end if;
end process;
process (valid_N, credit_in_N, credit_counter_N_in, credit_counter_N_out)
begin
if (valid_N = '1' and credit_in_N = '0' and credit_counter_N_out > 0 and credit_counter_N_in /= credit_counter_N_out - 1) then
err_grant_N_credit_counter_N_out_decrement <= '1';
else
err_grant_N_credit_counter_N_out_decrement <= '0';
end if;
end process;
process (valid_N, credit_in_N, credit_counter_N_in, credit_counter_N_out)
begin
if (valid_N = '1' and credit_in_N = '0' and credit_counter_N_out = 0 and credit_counter_N_in /= credit_counter_N_out) then
err_not_grant_N_or_credit_counter_N_out_zero_credit_counter_N_in_not_change <= '1';
else
err_not_grant_N_or_credit_counter_N_out_zero_credit_counter_N_in_not_change <= '0';
end if;
end process;
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '0' and valid_N = '0' and credit_counter_N_in /= credit_counter_N_out) then
err_not_credit_in_N_not_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '1';
else
err_not_credit_in_N_not_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '0';
end if;
end process;
-- East credit counter
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '1' and valid_E = '1' and credit_counter_E_in /= credit_counter_E_out) then
err_credit_in_E_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '1';
else
err_credit_in_E_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '0';
end if;
end process;
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '1' and valid_E = '0' and credit_counter_E_out < 3 and credit_counter_E_in /= credit_counter_E_out + 1) then
err_credit_in_E_credit_counter_E_out_increment <= '1';
else
err_credit_in_E_credit_counter_E_out_increment <= '0';
end if;
end process;
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '1' and valid_E = '0' and credit_counter_E_out = 3 and credit_counter_E_in /= credit_counter_E_out) then
err_not_credit_in_E_credit_counter_E_out_max_credit_counter_E_in_not_change <= '1';
else
err_not_credit_in_E_credit_counter_E_out_max_credit_counter_E_in_not_change <= '0';
end if;
end process;
process (valid_E, credit_in_E, credit_counter_E_in, credit_counter_E_out)
begin
if (valid_E = '1' and credit_in_E = '0' and credit_counter_E_out > 0 and credit_counter_E_in /= credit_counter_E_out - 1) then
err_grant_E_credit_counter_E_out_decrement <= '1';
else
err_grant_E_credit_counter_E_out_decrement <= '0';
end if;
end process;
process (valid_E, credit_in_E, credit_counter_E_in, credit_counter_E_out)
begin
if (valid_E = '1' and credit_in_E = '0' and credit_counter_E_out = 0 and credit_counter_E_in /= credit_counter_E_out) then
err_not_grant_E_or_credit_counter_E_out_zero_credit_counter_E_in_not_change <= '1';
else
err_not_grant_E_or_credit_counter_E_out_zero_credit_counter_E_in_not_change <= '0';
end if;
end process;
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '0' and valid_E = '0' and credit_counter_E_in /= credit_counter_E_out) then
err_not_credit_in_E_not_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '1';
else
err_not_credit_in_E_not_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '0';
end if;
end process;
-- West credit counter
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if (credit_in_W = '1' and valid_W = '1' and credit_counter_W_in /= credit_counter_W_out) then
err_credit_in_W_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '1';
else
err_credit_in_W_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '0';
end if;
end process;
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if (credit_in_W = '1' and valid_W = '0' and credit_counter_W_out < 3 and credit_counter_W_in /= credit_counter_W_out + 1) then
err_credit_in_W_credit_counter_W_out_increment <= '1';
else
err_credit_in_W_credit_counter_W_out_increment <= '0';
end if;
end process;
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if ( (credit_in_W = '1' and valid_W = '0' and credit_counter_W_out = 3) and credit_counter_W_in /= credit_counter_W_out) then
err_not_credit_in_W_credit_counter_W_out_max_credit_counter_W_in_not_change <= '1';
else
err_not_credit_in_W_credit_counter_W_out_max_credit_counter_W_in_not_change <= '0';
end if;
end process;
process (valid_W, credit_in_W, credit_counter_W_in, credit_counter_W_out)
begin
if (valid_W = '1' and credit_in_W = '0' and credit_counter_W_out > 0 and credit_counter_W_in /= credit_counter_W_out - 1) then
err_grant_W_credit_counter_W_out_decrement <= '1';
else
err_grant_W_credit_counter_W_out_decrement <= '0';
end if;
end process;
process (valid_W, credit_in_W, credit_counter_W_in, credit_counter_W_out)
begin
if ( valid_W = '1' and credit_in_W = '0' and credit_counter_W_out = 0 and credit_counter_W_in /= credit_counter_W_out) then
err_not_grant_W_or_credit_counter_W_out_zero_credit_counter_W_in_not_change <= '1';
else
err_not_grant_W_or_credit_counter_W_out_zero_credit_counter_W_in_not_change <= '0';
end if;
end process;
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if (credit_in_W = '0' and valid_W = '0' and credit_counter_W_in /= credit_counter_W_out) then
err_not_credit_in_W_not_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '1';
else
err_not_credit_in_W_not_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '0';
end if;
end process;
-- South credit counter
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if (credit_in_S = '1' and valid_S = '1' and credit_counter_S_in /= credit_counter_S_out) then
err_credit_in_S_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '1';
else
err_credit_in_S_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '0';
end if;
end process;
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if (credit_in_S = '1' and valid_S = '0' and credit_counter_S_out < 3 and credit_counter_S_in /= credit_counter_S_out + 1) then
err_credit_in_S_credit_counter_S_out_increment <= '1';
else
err_credit_in_S_credit_counter_S_out_increment <= '0';
end if;
end process;
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if ( credit_in_S = '1' and valid_S = '0' and credit_counter_S_out = 3 and credit_counter_S_in /= credit_counter_S_out) then
err_not_credit_in_S_credit_counter_S_out_max_credit_counter_S_in_not_change <= '1';
else
err_not_credit_in_S_credit_counter_S_out_max_credit_counter_S_in_not_change <= '0';
end if;
end process;
process (valid_S, credit_in_S, credit_counter_S_in, credit_counter_S_out)
begin
if (valid_S = '1' and credit_in_S = '0' and credit_counter_S_out > 0 and credit_counter_S_in /= credit_counter_S_out - 1) then
err_grant_S_credit_counter_S_out_decrement <= '1';
else
err_grant_S_credit_counter_S_out_decrement <= '0';
end if;
end process;
process (valid_S, credit_in_S, credit_counter_S_in, credit_counter_S_out)
begin
if (valid_S = '1' and credit_in_S = '0' and credit_counter_S_out = 0 and credit_counter_S_in /= credit_counter_S_out) then
err_not_grant_S_or_credit_counter_S_out_zero_credit_counter_S_in_not_change <= '1';
else
err_not_grant_S_or_credit_counter_S_out_zero_credit_counter_S_in_not_change <= '0';
end if;
end process;
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if (credit_in_S = '0' and valid_S = '0' and credit_counter_S_in /= credit_counter_S_out) then
err_not_credit_in_S_not_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '1';
else
err_not_credit_in_S_not_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '0';
end if;
end process;
-- Local credit counter
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '1' and valid_L = '1' and credit_counter_L_in /= credit_counter_L_out) then
err_credit_in_L_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '1';
else
err_credit_in_L_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '0';
end if;
end process;
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '1' and valid_L = '0' and credit_counter_L_out < 3 and credit_counter_L_in /= credit_counter_L_out + 1) then
err_credit_in_L_credit_counter_L_out_increment <= '1';
else
err_credit_in_L_credit_counter_L_out_increment <= '0';
end if;
end process;
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '1' and valid_L = '0' and credit_counter_L_out = 3 and credit_counter_L_in /= credit_counter_L_out) then
err_not_credit_in_L_credit_counter_L_out_max_credit_counter_L_in_not_change <= '1';
else
err_not_credit_in_L_credit_counter_L_out_max_credit_counter_L_in_not_change <= '0';
end if;
end process;
process (valid_L, credit_in_L, credit_counter_L_in, credit_counter_L_out)
begin
if (valid_L = '1' and credit_in_L = '0' and credit_counter_L_out > 0 and credit_counter_L_in /= credit_counter_L_out - 1) then
err_grant_L_credit_counter_L_out_decrement <= '1';
else
err_grant_L_credit_counter_L_out_decrement <= '0';
end if;
end process;
process (valid_L, credit_in_L, credit_counter_L_in, credit_counter_L_out)
begin
if (valid_L = '1' and credit_in_L = '0' and credit_counter_L_out = 0 and credit_counter_L_in /= credit_counter_L_out) then
err_not_grant_L_or_credit_counter_L_out_zero_credit_counter_L_in_not_change <= '1';
else
err_not_grant_L_or_credit_counter_L_out_zero_credit_counter_L_in_not_change <= '0';
end if;
end process;
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '0' and valid_L = '0' and credit_counter_L_in /= credit_counter_L_out) then
err_not_credit_in_L_not_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '1';
else
err_not_credit_in_L_not_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '0';
end if;
end process;
END;
|
--Copyright (C) 2016 Siavoosh Payandeh Azad Behrad Niazmand
library ieee;
use ieee.std_logic_1164.all;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity allocator_credit_counter_logic_pseudo_checkers is
port (
-- flow control
credit_in_N, credit_in_E, credit_in_W, credit_in_S, credit_in_L: in std_logic;
credit_counter_N_out, credit_counter_E_out, credit_counter_W_out, credit_counter_S_out, credit_counter_L_out : in std_logic_vector(1 downto 0);
valid_N, valid_E, valid_W, valid_S, valid_L: in std_logic; -- ?? Not sure yet ! grant or valid !
credit_counter_N_in, credit_counter_E_in, credit_counter_W_in, credit_counter_S_in, credit_counter_L_in : in std_logic_vector(1 downto 0);
-- Checker outputs
err_credit_in_N_grant_N_credit_counter_N_in_credit_counter_N_out_equal,
err_credit_in_N_credit_counter_N_out_increment,
err_not_credit_in_N_credit_counter_N_out_max_credit_counter_N_in_not_change,
err_grant_N_credit_counter_N_out_decrement,
err_not_grant_N_or_credit_counter_N_out_zero_credit_counter_N_in_not_change,
err_not_credit_in_N_not_grant_N_credit_counter_N_in_credit_counter_N_out_equal,
err_credit_in_E_grant_E_credit_counter_E_in_credit_counter_E_out_equal,
err_credit_in_E_credit_counter_E_out_increment,
err_not_credit_in_E_credit_counter_E_out_max_credit_counter_E_in_not_change,
err_grant_E_credit_counter_E_out_decrement,
err_not_grant_E_or_credit_counter_E_out_zero_credit_counter_E_in_not_change,
err_not_credit_in_E_not_grant_E_credit_counter_E_in_credit_counter_E_out_equal,
err_credit_in_W_grant_W_credit_counter_W_in_credit_counter_W_out_equal,
err_credit_in_W_credit_counter_W_out_increment,
err_not_credit_in_W_credit_counter_W_out_max_credit_counter_W_in_not_change,
err_grant_W_credit_counter_W_out_decrement,
err_not_grant_W_or_credit_counter_W_out_zero_credit_counter_W_in_not_change,
err_not_credit_in_W_not_grant_W_credit_counter_W_in_credit_counter_W_out_equal,
err_credit_in_S_grant_S_credit_counter_S_in_credit_counter_S_out_equal,
err_credit_in_S_credit_counter_S_out_increment,
err_not_credit_in_S_credit_counter_S_out_max_credit_counter_S_in_not_change,
err_grant_S_credit_counter_S_out_decrement,
err_not_grant_S_or_credit_counter_S_out_zero_credit_counter_S_in_not_change,
err_not_credit_in_S_not_grant_S_credit_counter_S_in_credit_counter_S_out_equal,
err_credit_in_L_grant_L_credit_counter_L_in_credit_counter_L_out_equal,
err_credit_in_L_credit_counter_L_out_increment,
err_not_credit_in_L_credit_counter_L_out_max_credit_counter_L_in_not_change,
err_grant_L_credit_counter_L_out_decrement,
err_not_grant_L_or_credit_counter_L_out_zero_credit_counter_L_in_not_change,
err_not_credit_in_L_not_grant_L_credit_counter_L_in_credit_counter_L_out_equal : out std_logic
);
end allocator_credit_counter_logic_pseudo_checkers;
architecture behavior of allocator_credit_counter_logic_pseudo_checkers is
begin
-- The combionational part
----------------------------------------------------------------
-- Checkers for the process handling the credit counters
-- North credit counter
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '1' and valid_N = '1' and credit_counter_N_in /= credit_counter_N_out) then
err_credit_in_N_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '1';
else
err_credit_in_N_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '0';
end if;
end process;
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '1' and valid_N = '1' and credit_counter_N_out < 3 and credit_counter_N_in /= credit_counter_N_out + 1) then
err_credit_in_N_credit_counter_N_out_increment <= '1';
else
err_credit_in_N_credit_counter_N_out_increment <= '0';
end if;
end process;
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '1' and valid_N = '0' and credit_counter_N_out = 3 and credit_counter_N_in /= credit_counter_N_out) then
err_not_credit_in_N_credit_counter_N_out_max_credit_counter_N_in_not_change <= '1';
else
err_not_credit_in_N_credit_counter_N_out_max_credit_counter_N_in_not_change <= '0';
end if;
end process;
process (valid_N, credit_in_N, credit_counter_N_in, credit_counter_N_out)
begin
if (valid_N = '1' and credit_in_N = '0' and credit_counter_N_out > 0 and credit_counter_N_in /= credit_counter_N_out - 1) then
err_grant_N_credit_counter_N_out_decrement <= '1';
else
err_grant_N_credit_counter_N_out_decrement <= '0';
end if;
end process;
process (valid_N, credit_in_N, credit_counter_N_in, credit_counter_N_out)
begin
if (valid_N = '1' and credit_in_N = '0' and credit_counter_N_out = 0 and credit_counter_N_in /= credit_counter_N_out) then
err_not_grant_N_or_credit_counter_N_out_zero_credit_counter_N_in_not_change <= '1';
else
err_not_grant_N_or_credit_counter_N_out_zero_credit_counter_N_in_not_change <= '0';
end if;
end process;
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '0' and valid_N = '0' and credit_counter_N_in /= credit_counter_N_out) then
err_not_credit_in_N_not_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '1';
else
err_not_credit_in_N_not_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '0';
end if;
end process;
-- East credit counter
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '1' and valid_E = '1' and credit_counter_E_in /= credit_counter_E_out) then
err_credit_in_E_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '1';
else
err_credit_in_E_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '0';
end if;
end process;
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '1' and valid_E = '0' and credit_counter_E_out < 3 and credit_counter_E_in /= credit_counter_E_out + 1) then
err_credit_in_E_credit_counter_E_out_increment <= '1';
else
err_credit_in_E_credit_counter_E_out_increment <= '0';
end if;
end process;
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '1' and valid_E = '0' and credit_counter_E_out = 3 and credit_counter_E_in /= credit_counter_E_out) then
err_not_credit_in_E_credit_counter_E_out_max_credit_counter_E_in_not_change <= '1';
else
err_not_credit_in_E_credit_counter_E_out_max_credit_counter_E_in_not_change <= '0';
end if;
end process;
process (valid_E, credit_in_E, credit_counter_E_in, credit_counter_E_out)
begin
if (valid_E = '1' and credit_in_E = '0' and credit_counter_E_out > 0 and credit_counter_E_in /= credit_counter_E_out - 1) then
err_grant_E_credit_counter_E_out_decrement <= '1';
else
err_grant_E_credit_counter_E_out_decrement <= '0';
end if;
end process;
process (valid_E, credit_in_E, credit_counter_E_in, credit_counter_E_out)
begin
if (valid_E = '1' and credit_in_E = '0' and credit_counter_E_out = 0 and credit_counter_E_in /= credit_counter_E_out) then
err_not_grant_E_or_credit_counter_E_out_zero_credit_counter_E_in_not_change <= '1';
else
err_not_grant_E_or_credit_counter_E_out_zero_credit_counter_E_in_not_change <= '0';
end if;
end process;
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '0' and valid_E = '0' and credit_counter_E_in /= credit_counter_E_out) then
err_not_credit_in_E_not_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '1';
else
err_not_credit_in_E_not_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '0';
end if;
end process;
-- West credit counter
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if (credit_in_W = '1' and valid_W = '1' and credit_counter_W_in /= credit_counter_W_out) then
err_credit_in_W_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '1';
else
err_credit_in_W_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '0';
end if;
end process;
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if (credit_in_W = '1' and valid_W = '0' and credit_counter_W_out < 3 and credit_counter_W_in /= credit_counter_W_out + 1) then
err_credit_in_W_credit_counter_W_out_increment <= '1';
else
err_credit_in_W_credit_counter_W_out_increment <= '0';
end if;
end process;
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if ( (credit_in_W = '1' and valid_W = '0' and credit_counter_W_out = 3) and credit_counter_W_in /= credit_counter_W_out) then
err_not_credit_in_W_credit_counter_W_out_max_credit_counter_W_in_not_change <= '1';
else
err_not_credit_in_W_credit_counter_W_out_max_credit_counter_W_in_not_change <= '0';
end if;
end process;
process (valid_W, credit_in_W, credit_counter_W_in, credit_counter_W_out)
begin
if (valid_W = '1' and credit_in_W = '0' and credit_counter_W_out > 0 and credit_counter_W_in /= credit_counter_W_out - 1) then
err_grant_W_credit_counter_W_out_decrement <= '1';
else
err_grant_W_credit_counter_W_out_decrement <= '0';
end if;
end process;
process (valid_W, credit_in_W, credit_counter_W_in, credit_counter_W_out)
begin
if ( valid_W = '1' and credit_in_W = '0' and credit_counter_W_out = 0 and credit_counter_W_in /= credit_counter_W_out) then
err_not_grant_W_or_credit_counter_W_out_zero_credit_counter_W_in_not_change <= '1';
else
err_not_grant_W_or_credit_counter_W_out_zero_credit_counter_W_in_not_change <= '0';
end if;
end process;
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if (credit_in_W = '0' and valid_W = '0' and credit_counter_W_in /= credit_counter_W_out) then
err_not_credit_in_W_not_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '1';
else
err_not_credit_in_W_not_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '0';
end if;
end process;
-- South credit counter
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if (credit_in_S = '1' and valid_S = '1' and credit_counter_S_in /= credit_counter_S_out) then
err_credit_in_S_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '1';
else
err_credit_in_S_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '0';
end if;
end process;
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if (credit_in_S = '1' and valid_S = '0' and credit_counter_S_out < 3 and credit_counter_S_in /= credit_counter_S_out + 1) then
err_credit_in_S_credit_counter_S_out_increment <= '1';
else
err_credit_in_S_credit_counter_S_out_increment <= '0';
end if;
end process;
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if ( credit_in_S = '1' and valid_S = '0' and credit_counter_S_out = 3 and credit_counter_S_in /= credit_counter_S_out) then
err_not_credit_in_S_credit_counter_S_out_max_credit_counter_S_in_not_change <= '1';
else
err_not_credit_in_S_credit_counter_S_out_max_credit_counter_S_in_not_change <= '0';
end if;
end process;
process (valid_S, credit_in_S, credit_counter_S_in, credit_counter_S_out)
begin
if (valid_S = '1' and credit_in_S = '0' and credit_counter_S_out > 0 and credit_counter_S_in /= credit_counter_S_out - 1) then
err_grant_S_credit_counter_S_out_decrement <= '1';
else
err_grant_S_credit_counter_S_out_decrement <= '0';
end if;
end process;
process (valid_S, credit_in_S, credit_counter_S_in, credit_counter_S_out)
begin
if (valid_S = '1' and credit_in_S = '0' and credit_counter_S_out = 0 and credit_counter_S_in /= credit_counter_S_out) then
err_not_grant_S_or_credit_counter_S_out_zero_credit_counter_S_in_not_change <= '1';
else
err_not_grant_S_or_credit_counter_S_out_zero_credit_counter_S_in_not_change <= '0';
end if;
end process;
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if (credit_in_S = '0' and valid_S = '0' and credit_counter_S_in /= credit_counter_S_out) then
err_not_credit_in_S_not_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '1';
else
err_not_credit_in_S_not_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '0';
end if;
end process;
-- Local credit counter
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '1' and valid_L = '1' and credit_counter_L_in /= credit_counter_L_out) then
err_credit_in_L_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '1';
else
err_credit_in_L_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '0';
end if;
end process;
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '1' and valid_L = '0' and credit_counter_L_out < 3 and credit_counter_L_in /= credit_counter_L_out + 1) then
err_credit_in_L_credit_counter_L_out_increment <= '1';
else
err_credit_in_L_credit_counter_L_out_increment <= '0';
end if;
end process;
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '1' and valid_L = '0' and credit_counter_L_out = 3 and credit_counter_L_in /= credit_counter_L_out) then
err_not_credit_in_L_credit_counter_L_out_max_credit_counter_L_in_not_change <= '1';
else
err_not_credit_in_L_credit_counter_L_out_max_credit_counter_L_in_not_change <= '0';
end if;
end process;
process (valid_L, credit_in_L, credit_counter_L_in, credit_counter_L_out)
begin
if (valid_L = '1' and credit_in_L = '0' and credit_counter_L_out > 0 and credit_counter_L_in /= credit_counter_L_out - 1) then
err_grant_L_credit_counter_L_out_decrement <= '1';
else
err_grant_L_credit_counter_L_out_decrement <= '0';
end if;
end process;
process (valid_L, credit_in_L, credit_counter_L_in, credit_counter_L_out)
begin
if (valid_L = '1' and credit_in_L = '0' and credit_counter_L_out = 0 and credit_counter_L_in /= credit_counter_L_out) then
err_not_grant_L_or_credit_counter_L_out_zero_credit_counter_L_in_not_change <= '1';
else
err_not_grant_L_or_credit_counter_L_out_zero_credit_counter_L_in_not_change <= '0';
end if;
end process;
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '0' and valid_L = '0' and credit_counter_L_in /= credit_counter_L_out) then
err_not_credit_in_L_not_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '1';
else
err_not_credit_in_L_not_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '0';
end if;
end process;
END;
|
--Copyright (C) 2016 Siavoosh Payandeh Azad Behrad Niazmand
library ieee;
use ieee.std_logic_1164.all;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity allocator_credit_counter_logic_pseudo_checkers is
port (
-- flow control
credit_in_N, credit_in_E, credit_in_W, credit_in_S, credit_in_L: in std_logic;
credit_counter_N_out, credit_counter_E_out, credit_counter_W_out, credit_counter_S_out, credit_counter_L_out : in std_logic_vector(1 downto 0);
valid_N, valid_E, valid_W, valid_S, valid_L: in std_logic; -- ?? Not sure yet ! grant or valid !
credit_counter_N_in, credit_counter_E_in, credit_counter_W_in, credit_counter_S_in, credit_counter_L_in : in std_logic_vector(1 downto 0);
-- Checker outputs
err_credit_in_N_grant_N_credit_counter_N_in_credit_counter_N_out_equal,
err_credit_in_N_credit_counter_N_out_increment,
err_not_credit_in_N_credit_counter_N_out_max_credit_counter_N_in_not_change,
err_grant_N_credit_counter_N_out_decrement,
err_not_grant_N_or_credit_counter_N_out_zero_credit_counter_N_in_not_change,
err_not_credit_in_N_not_grant_N_credit_counter_N_in_credit_counter_N_out_equal,
err_credit_in_E_grant_E_credit_counter_E_in_credit_counter_E_out_equal,
err_credit_in_E_credit_counter_E_out_increment,
err_not_credit_in_E_credit_counter_E_out_max_credit_counter_E_in_not_change,
err_grant_E_credit_counter_E_out_decrement,
err_not_grant_E_or_credit_counter_E_out_zero_credit_counter_E_in_not_change,
err_not_credit_in_E_not_grant_E_credit_counter_E_in_credit_counter_E_out_equal,
err_credit_in_W_grant_W_credit_counter_W_in_credit_counter_W_out_equal,
err_credit_in_W_credit_counter_W_out_increment,
err_not_credit_in_W_credit_counter_W_out_max_credit_counter_W_in_not_change,
err_grant_W_credit_counter_W_out_decrement,
err_not_grant_W_or_credit_counter_W_out_zero_credit_counter_W_in_not_change,
err_not_credit_in_W_not_grant_W_credit_counter_W_in_credit_counter_W_out_equal,
err_credit_in_S_grant_S_credit_counter_S_in_credit_counter_S_out_equal,
err_credit_in_S_credit_counter_S_out_increment,
err_not_credit_in_S_credit_counter_S_out_max_credit_counter_S_in_not_change,
err_grant_S_credit_counter_S_out_decrement,
err_not_grant_S_or_credit_counter_S_out_zero_credit_counter_S_in_not_change,
err_not_credit_in_S_not_grant_S_credit_counter_S_in_credit_counter_S_out_equal,
err_credit_in_L_grant_L_credit_counter_L_in_credit_counter_L_out_equal,
err_credit_in_L_credit_counter_L_out_increment,
err_not_credit_in_L_credit_counter_L_out_max_credit_counter_L_in_not_change,
err_grant_L_credit_counter_L_out_decrement,
err_not_grant_L_or_credit_counter_L_out_zero_credit_counter_L_in_not_change,
err_not_credit_in_L_not_grant_L_credit_counter_L_in_credit_counter_L_out_equal : out std_logic
);
end allocator_credit_counter_logic_pseudo_checkers;
architecture behavior of allocator_credit_counter_logic_pseudo_checkers is
begin
-- The combionational part
----------------------------------------------------------------
-- Checkers for the process handling the credit counters
-- North credit counter
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '1' and valid_N = '1' and credit_counter_N_in /= credit_counter_N_out) then
err_credit_in_N_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '1';
else
err_credit_in_N_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '0';
end if;
end process;
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '1' and valid_N = '1' and credit_counter_N_out < 3 and credit_counter_N_in /= credit_counter_N_out + 1) then
err_credit_in_N_credit_counter_N_out_increment <= '1';
else
err_credit_in_N_credit_counter_N_out_increment <= '0';
end if;
end process;
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '1' and valid_N = '0' and credit_counter_N_out = 3 and credit_counter_N_in /= credit_counter_N_out) then
err_not_credit_in_N_credit_counter_N_out_max_credit_counter_N_in_not_change <= '1';
else
err_not_credit_in_N_credit_counter_N_out_max_credit_counter_N_in_not_change <= '0';
end if;
end process;
process (valid_N, credit_in_N, credit_counter_N_in, credit_counter_N_out)
begin
if (valid_N = '1' and credit_in_N = '0' and credit_counter_N_out > 0 and credit_counter_N_in /= credit_counter_N_out - 1) then
err_grant_N_credit_counter_N_out_decrement <= '1';
else
err_grant_N_credit_counter_N_out_decrement <= '0';
end if;
end process;
process (valid_N, credit_in_N, credit_counter_N_in, credit_counter_N_out)
begin
if (valid_N = '1' and credit_in_N = '0' and credit_counter_N_out = 0 and credit_counter_N_in /= credit_counter_N_out) then
err_not_grant_N_or_credit_counter_N_out_zero_credit_counter_N_in_not_change <= '1';
else
err_not_grant_N_or_credit_counter_N_out_zero_credit_counter_N_in_not_change <= '0';
end if;
end process;
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '0' and valid_N = '0' and credit_counter_N_in /= credit_counter_N_out) then
err_not_credit_in_N_not_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '1';
else
err_not_credit_in_N_not_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '0';
end if;
end process;
-- East credit counter
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '1' and valid_E = '1' and credit_counter_E_in /= credit_counter_E_out) then
err_credit_in_E_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '1';
else
err_credit_in_E_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '0';
end if;
end process;
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '1' and valid_E = '0' and credit_counter_E_out < 3 and credit_counter_E_in /= credit_counter_E_out + 1) then
err_credit_in_E_credit_counter_E_out_increment <= '1';
else
err_credit_in_E_credit_counter_E_out_increment <= '0';
end if;
end process;
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '1' and valid_E = '0' and credit_counter_E_out = 3 and credit_counter_E_in /= credit_counter_E_out) then
err_not_credit_in_E_credit_counter_E_out_max_credit_counter_E_in_not_change <= '1';
else
err_not_credit_in_E_credit_counter_E_out_max_credit_counter_E_in_not_change <= '0';
end if;
end process;
process (valid_E, credit_in_E, credit_counter_E_in, credit_counter_E_out)
begin
if (valid_E = '1' and credit_in_E = '0' and credit_counter_E_out > 0 and credit_counter_E_in /= credit_counter_E_out - 1) then
err_grant_E_credit_counter_E_out_decrement <= '1';
else
err_grant_E_credit_counter_E_out_decrement <= '0';
end if;
end process;
process (valid_E, credit_in_E, credit_counter_E_in, credit_counter_E_out)
begin
if (valid_E = '1' and credit_in_E = '0' and credit_counter_E_out = 0 and credit_counter_E_in /= credit_counter_E_out) then
err_not_grant_E_or_credit_counter_E_out_zero_credit_counter_E_in_not_change <= '1';
else
err_not_grant_E_or_credit_counter_E_out_zero_credit_counter_E_in_not_change <= '0';
end if;
end process;
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '0' and valid_E = '0' and credit_counter_E_in /= credit_counter_E_out) then
err_not_credit_in_E_not_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '1';
else
err_not_credit_in_E_not_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '0';
end if;
end process;
-- West credit counter
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if (credit_in_W = '1' and valid_W = '1' and credit_counter_W_in /= credit_counter_W_out) then
err_credit_in_W_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '1';
else
err_credit_in_W_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '0';
end if;
end process;
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if (credit_in_W = '1' and valid_W = '0' and credit_counter_W_out < 3 and credit_counter_W_in /= credit_counter_W_out + 1) then
err_credit_in_W_credit_counter_W_out_increment <= '1';
else
err_credit_in_W_credit_counter_W_out_increment <= '0';
end if;
end process;
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if ( (credit_in_W = '1' and valid_W = '0' and credit_counter_W_out = 3) and credit_counter_W_in /= credit_counter_W_out) then
err_not_credit_in_W_credit_counter_W_out_max_credit_counter_W_in_not_change <= '1';
else
err_not_credit_in_W_credit_counter_W_out_max_credit_counter_W_in_not_change <= '0';
end if;
end process;
process (valid_W, credit_in_W, credit_counter_W_in, credit_counter_W_out)
begin
if (valid_W = '1' and credit_in_W = '0' and credit_counter_W_out > 0 and credit_counter_W_in /= credit_counter_W_out - 1) then
err_grant_W_credit_counter_W_out_decrement <= '1';
else
err_grant_W_credit_counter_W_out_decrement <= '0';
end if;
end process;
process (valid_W, credit_in_W, credit_counter_W_in, credit_counter_W_out)
begin
if ( valid_W = '1' and credit_in_W = '0' and credit_counter_W_out = 0 and credit_counter_W_in /= credit_counter_W_out) then
err_not_grant_W_or_credit_counter_W_out_zero_credit_counter_W_in_not_change <= '1';
else
err_not_grant_W_or_credit_counter_W_out_zero_credit_counter_W_in_not_change <= '0';
end if;
end process;
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if (credit_in_W = '0' and valid_W = '0' and credit_counter_W_in /= credit_counter_W_out) then
err_not_credit_in_W_not_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '1';
else
err_not_credit_in_W_not_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '0';
end if;
end process;
-- South credit counter
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if (credit_in_S = '1' and valid_S = '1' and credit_counter_S_in /= credit_counter_S_out) then
err_credit_in_S_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '1';
else
err_credit_in_S_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '0';
end if;
end process;
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if (credit_in_S = '1' and valid_S = '0' and credit_counter_S_out < 3 and credit_counter_S_in /= credit_counter_S_out + 1) then
err_credit_in_S_credit_counter_S_out_increment <= '1';
else
err_credit_in_S_credit_counter_S_out_increment <= '0';
end if;
end process;
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if ( credit_in_S = '1' and valid_S = '0' and credit_counter_S_out = 3 and credit_counter_S_in /= credit_counter_S_out) then
err_not_credit_in_S_credit_counter_S_out_max_credit_counter_S_in_not_change <= '1';
else
err_not_credit_in_S_credit_counter_S_out_max_credit_counter_S_in_not_change <= '0';
end if;
end process;
process (valid_S, credit_in_S, credit_counter_S_in, credit_counter_S_out)
begin
if (valid_S = '1' and credit_in_S = '0' and credit_counter_S_out > 0 and credit_counter_S_in /= credit_counter_S_out - 1) then
err_grant_S_credit_counter_S_out_decrement <= '1';
else
err_grant_S_credit_counter_S_out_decrement <= '0';
end if;
end process;
process (valid_S, credit_in_S, credit_counter_S_in, credit_counter_S_out)
begin
if (valid_S = '1' and credit_in_S = '0' and credit_counter_S_out = 0 and credit_counter_S_in /= credit_counter_S_out) then
err_not_grant_S_or_credit_counter_S_out_zero_credit_counter_S_in_not_change <= '1';
else
err_not_grant_S_or_credit_counter_S_out_zero_credit_counter_S_in_not_change <= '0';
end if;
end process;
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if (credit_in_S = '0' and valid_S = '0' and credit_counter_S_in /= credit_counter_S_out) then
err_not_credit_in_S_not_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '1';
else
err_not_credit_in_S_not_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '0';
end if;
end process;
-- Local credit counter
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '1' and valid_L = '1' and credit_counter_L_in /= credit_counter_L_out) then
err_credit_in_L_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '1';
else
err_credit_in_L_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '0';
end if;
end process;
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '1' and valid_L = '0' and credit_counter_L_out < 3 and credit_counter_L_in /= credit_counter_L_out + 1) then
err_credit_in_L_credit_counter_L_out_increment <= '1';
else
err_credit_in_L_credit_counter_L_out_increment <= '0';
end if;
end process;
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '1' and valid_L = '0' and credit_counter_L_out = 3 and credit_counter_L_in /= credit_counter_L_out) then
err_not_credit_in_L_credit_counter_L_out_max_credit_counter_L_in_not_change <= '1';
else
err_not_credit_in_L_credit_counter_L_out_max_credit_counter_L_in_not_change <= '0';
end if;
end process;
process (valid_L, credit_in_L, credit_counter_L_in, credit_counter_L_out)
begin
if (valid_L = '1' and credit_in_L = '0' and credit_counter_L_out > 0 and credit_counter_L_in /= credit_counter_L_out - 1) then
err_grant_L_credit_counter_L_out_decrement <= '1';
else
err_grant_L_credit_counter_L_out_decrement <= '0';
end if;
end process;
process (valid_L, credit_in_L, credit_counter_L_in, credit_counter_L_out)
begin
if (valid_L = '1' and credit_in_L = '0' and credit_counter_L_out = 0 and credit_counter_L_in /= credit_counter_L_out) then
err_not_grant_L_or_credit_counter_L_out_zero_credit_counter_L_in_not_change <= '1';
else
err_not_grant_L_or_credit_counter_L_out_zero_credit_counter_L_in_not_change <= '0';
end if;
end process;
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '0' and valid_L = '0' and credit_counter_L_in /= credit_counter_L_out) then
err_not_credit_in_L_not_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '1';
else
err_not_credit_in_L_not_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '0';
end if;
end process;
END;
|
--Copyright (C) 2016 Siavoosh Payandeh Azad Behrad Niazmand
library ieee;
use ieee.std_logic_1164.all;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity allocator_credit_counter_logic_pseudo_checkers is
port (
-- flow control
credit_in_N, credit_in_E, credit_in_W, credit_in_S, credit_in_L: in std_logic;
credit_counter_N_out, credit_counter_E_out, credit_counter_W_out, credit_counter_S_out, credit_counter_L_out : in std_logic_vector(1 downto 0);
valid_N, valid_E, valid_W, valid_S, valid_L: in std_logic; -- ?? Not sure yet ! grant or valid !
credit_counter_N_in, credit_counter_E_in, credit_counter_W_in, credit_counter_S_in, credit_counter_L_in : in std_logic_vector(1 downto 0);
-- Checker outputs
err_credit_in_N_grant_N_credit_counter_N_in_credit_counter_N_out_equal,
err_credit_in_N_credit_counter_N_out_increment,
err_not_credit_in_N_credit_counter_N_out_max_credit_counter_N_in_not_change,
err_grant_N_credit_counter_N_out_decrement,
err_not_grant_N_or_credit_counter_N_out_zero_credit_counter_N_in_not_change,
err_not_credit_in_N_not_grant_N_credit_counter_N_in_credit_counter_N_out_equal,
err_credit_in_E_grant_E_credit_counter_E_in_credit_counter_E_out_equal,
err_credit_in_E_credit_counter_E_out_increment,
err_not_credit_in_E_credit_counter_E_out_max_credit_counter_E_in_not_change,
err_grant_E_credit_counter_E_out_decrement,
err_not_grant_E_or_credit_counter_E_out_zero_credit_counter_E_in_not_change,
err_not_credit_in_E_not_grant_E_credit_counter_E_in_credit_counter_E_out_equal,
err_credit_in_W_grant_W_credit_counter_W_in_credit_counter_W_out_equal,
err_credit_in_W_credit_counter_W_out_increment,
err_not_credit_in_W_credit_counter_W_out_max_credit_counter_W_in_not_change,
err_grant_W_credit_counter_W_out_decrement,
err_not_grant_W_or_credit_counter_W_out_zero_credit_counter_W_in_not_change,
err_not_credit_in_W_not_grant_W_credit_counter_W_in_credit_counter_W_out_equal,
err_credit_in_S_grant_S_credit_counter_S_in_credit_counter_S_out_equal,
err_credit_in_S_credit_counter_S_out_increment,
err_not_credit_in_S_credit_counter_S_out_max_credit_counter_S_in_not_change,
err_grant_S_credit_counter_S_out_decrement,
err_not_grant_S_or_credit_counter_S_out_zero_credit_counter_S_in_not_change,
err_not_credit_in_S_not_grant_S_credit_counter_S_in_credit_counter_S_out_equal,
err_credit_in_L_grant_L_credit_counter_L_in_credit_counter_L_out_equal,
err_credit_in_L_credit_counter_L_out_increment,
err_not_credit_in_L_credit_counter_L_out_max_credit_counter_L_in_not_change,
err_grant_L_credit_counter_L_out_decrement,
err_not_grant_L_or_credit_counter_L_out_zero_credit_counter_L_in_not_change,
err_not_credit_in_L_not_grant_L_credit_counter_L_in_credit_counter_L_out_equal : out std_logic
);
end allocator_credit_counter_logic_pseudo_checkers;
architecture behavior of allocator_credit_counter_logic_pseudo_checkers is
begin
-- The combionational part
----------------------------------------------------------------
-- Checkers for the process handling the credit counters
-- North credit counter
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '1' and valid_N = '1' and credit_counter_N_in /= credit_counter_N_out) then
err_credit_in_N_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '1';
else
err_credit_in_N_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '0';
end if;
end process;
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '1' and valid_N = '1' and credit_counter_N_out < 3 and credit_counter_N_in /= credit_counter_N_out + 1) then
err_credit_in_N_credit_counter_N_out_increment <= '1';
else
err_credit_in_N_credit_counter_N_out_increment <= '0';
end if;
end process;
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '1' and valid_N = '0' and credit_counter_N_out = 3 and credit_counter_N_in /= credit_counter_N_out) then
err_not_credit_in_N_credit_counter_N_out_max_credit_counter_N_in_not_change <= '1';
else
err_not_credit_in_N_credit_counter_N_out_max_credit_counter_N_in_not_change <= '0';
end if;
end process;
process (valid_N, credit_in_N, credit_counter_N_in, credit_counter_N_out)
begin
if (valid_N = '1' and credit_in_N = '0' and credit_counter_N_out > 0 and credit_counter_N_in /= credit_counter_N_out - 1) then
err_grant_N_credit_counter_N_out_decrement <= '1';
else
err_grant_N_credit_counter_N_out_decrement <= '0';
end if;
end process;
process (valid_N, credit_in_N, credit_counter_N_in, credit_counter_N_out)
begin
if (valid_N = '1' and credit_in_N = '0' and credit_counter_N_out = 0 and credit_counter_N_in /= credit_counter_N_out) then
err_not_grant_N_or_credit_counter_N_out_zero_credit_counter_N_in_not_change <= '1';
else
err_not_grant_N_or_credit_counter_N_out_zero_credit_counter_N_in_not_change <= '0';
end if;
end process;
process (credit_in_N, valid_N, credit_counter_N_in, credit_counter_N_out)
begin
if (credit_in_N = '0' and valid_N = '0' and credit_counter_N_in /= credit_counter_N_out) then
err_not_credit_in_N_not_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '1';
else
err_not_credit_in_N_not_grant_N_credit_counter_N_in_credit_counter_N_out_equal <= '0';
end if;
end process;
-- East credit counter
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '1' and valid_E = '1' and credit_counter_E_in /= credit_counter_E_out) then
err_credit_in_E_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '1';
else
err_credit_in_E_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '0';
end if;
end process;
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '1' and valid_E = '0' and credit_counter_E_out < 3 and credit_counter_E_in /= credit_counter_E_out + 1) then
err_credit_in_E_credit_counter_E_out_increment <= '1';
else
err_credit_in_E_credit_counter_E_out_increment <= '0';
end if;
end process;
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '1' and valid_E = '0' and credit_counter_E_out = 3 and credit_counter_E_in /= credit_counter_E_out) then
err_not_credit_in_E_credit_counter_E_out_max_credit_counter_E_in_not_change <= '1';
else
err_not_credit_in_E_credit_counter_E_out_max_credit_counter_E_in_not_change <= '0';
end if;
end process;
process (valid_E, credit_in_E, credit_counter_E_in, credit_counter_E_out)
begin
if (valid_E = '1' and credit_in_E = '0' and credit_counter_E_out > 0 and credit_counter_E_in /= credit_counter_E_out - 1) then
err_grant_E_credit_counter_E_out_decrement <= '1';
else
err_grant_E_credit_counter_E_out_decrement <= '0';
end if;
end process;
process (valid_E, credit_in_E, credit_counter_E_in, credit_counter_E_out)
begin
if (valid_E = '1' and credit_in_E = '0' and credit_counter_E_out = 0 and credit_counter_E_in /= credit_counter_E_out) then
err_not_grant_E_or_credit_counter_E_out_zero_credit_counter_E_in_not_change <= '1';
else
err_not_grant_E_or_credit_counter_E_out_zero_credit_counter_E_in_not_change <= '0';
end if;
end process;
process (credit_in_E, valid_E, credit_counter_E_in, credit_counter_E_out)
begin
if (credit_in_E = '0' and valid_E = '0' and credit_counter_E_in /= credit_counter_E_out) then
err_not_credit_in_E_not_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '1';
else
err_not_credit_in_E_not_grant_E_credit_counter_E_in_credit_counter_E_out_equal <= '0';
end if;
end process;
-- West credit counter
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if (credit_in_W = '1' and valid_W = '1' and credit_counter_W_in /= credit_counter_W_out) then
err_credit_in_W_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '1';
else
err_credit_in_W_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '0';
end if;
end process;
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if (credit_in_W = '1' and valid_W = '0' and credit_counter_W_out < 3 and credit_counter_W_in /= credit_counter_W_out + 1) then
err_credit_in_W_credit_counter_W_out_increment <= '1';
else
err_credit_in_W_credit_counter_W_out_increment <= '0';
end if;
end process;
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if ( (credit_in_W = '1' and valid_W = '0' and credit_counter_W_out = 3) and credit_counter_W_in /= credit_counter_W_out) then
err_not_credit_in_W_credit_counter_W_out_max_credit_counter_W_in_not_change <= '1';
else
err_not_credit_in_W_credit_counter_W_out_max_credit_counter_W_in_not_change <= '0';
end if;
end process;
process (valid_W, credit_in_W, credit_counter_W_in, credit_counter_W_out)
begin
if (valid_W = '1' and credit_in_W = '0' and credit_counter_W_out > 0 and credit_counter_W_in /= credit_counter_W_out - 1) then
err_grant_W_credit_counter_W_out_decrement <= '1';
else
err_grant_W_credit_counter_W_out_decrement <= '0';
end if;
end process;
process (valid_W, credit_in_W, credit_counter_W_in, credit_counter_W_out)
begin
if ( valid_W = '1' and credit_in_W = '0' and credit_counter_W_out = 0 and credit_counter_W_in /= credit_counter_W_out) then
err_not_grant_W_or_credit_counter_W_out_zero_credit_counter_W_in_not_change <= '1';
else
err_not_grant_W_or_credit_counter_W_out_zero_credit_counter_W_in_not_change <= '0';
end if;
end process;
process (credit_in_W, valid_W, credit_counter_W_in, credit_counter_W_out)
begin
if (credit_in_W = '0' and valid_W = '0' and credit_counter_W_in /= credit_counter_W_out) then
err_not_credit_in_W_not_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '1';
else
err_not_credit_in_W_not_grant_W_credit_counter_W_in_credit_counter_W_out_equal <= '0';
end if;
end process;
-- South credit counter
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if (credit_in_S = '1' and valid_S = '1' and credit_counter_S_in /= credit_counter_S_out) then
err_credit_in_S_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '1';
else
err_credit_in_S_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '0';
end if;
end process;
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if (credit_in_S = '1' and valid_S = '0' and credit_counter_S_out < 3 and credit_counter_S_in /= credit_counter_S_out + 1) then
err_credit_in_S_credit_counter_S_out_increment <= '1';
else
err_credit_in_S_credit_counter_S_out_increment <= '0';
end if;
end process;
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if ( credit_in_S = '1' and valid_S = '0' and credit_counter_S_out = 3 and credit_counter_S_in /= credit_counter_S_out) then
err_not_credit_in_S_credit_counter_S_out_max_credit_counter_S_in_not_change <= '1';
else
err_not_credit_in_S_credit_counter_S_out_max_credit_counter_S_in_not_change <= '0';
end if;
end process;
process (valid_S, credit_in_S, credit_counter_S_in, credit_counter_S_out)
begin
if (valid_S = '1' and credit_in_S = '0' and credit_counter_S_out > 0 and credit_counter_S_in /= credit_counter_S_out - 1) then
err_grant_S_credit_counter_S_out_decrement <= '1';
else
err_grant_S_credit_counter_S_out_decrement <= '0';
end if;
end process;
process (valid_S, credit_in_S, credit_counter_S_in, credit_counter_S_out)
begin
if (valid_S = '1' and credit_in_S = '0' and credit_counter_S_out = 0 and credit_counter_S_in /= credit_counter_S_out) then
err_not_grant_S_or_credit_counter_S_out_zero_credit_counter_S_in_not_change <= '1';
else
err_not_grant_S_or_credit_counter_S_out_zero_credit_counter_S_in_not_change <= '0';
end if;
end process;
process (credit_in_S, valid_S, credit_counter_S_in, credit_counter_S_out)
begin
if (credit_in_S = '0' and valid_S = '0' and credit_counter_S_in /= credit_counter_S_out) then
err_not_credit_in_S_not_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '1';
else
err_not_credit_in_S_not_grant_S_credit_counter_S_in_credit_counter_S_out_equal <= '0';
end if;
end process;
-- Local credit counter
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '1' and valid_L = '1' and credit_counter_L_in /= credit_counter_L_out) then
err_credit_in_L_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '1';
else
err_credit_in_L_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '0';
end if;
end process;
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '1' and valid_L = '0' and credit_counter_L_out < 3 and credit_counter_L_in /= credit_counter_L_out + 1) then
err_credit_in_L_credit_counter_L_out_increment <= '1';
else
err_credit_in_L_credit_counter_L_out_increment <= '0';
end if;
end process;
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '1' and valid_L = '0' and credit_counter_L_out = 3 and credit_counter_L_in /= credit_counter_L_out) then
err_not_credit_in_L_credit_counter_L_out_max_credit_counter_L_in_not_change <= '1';
else
err_not_credit_in_L_credit_counter_L_out_max_credit_counter_L_in_not_change <= '0';
end if;
end process;
process (valid_L, credit_in_L, credit_counter_L_in, credit_counter_L_out)
begin
if (valid_L = '1' and credit_in_L = '0' and credit_counter_L_out > 0 and credit_counter_L_in /= credit_counter_L_out - 1) then
err_grant_L_credit_counter_L_out_decrement <= '1';
else
err_grant_L_credit_counter_L_out_decrement <= '0';
end if;
end process;
process (valid_L, credit_in_L, credit_counter_L_in, credit_counter_L_out)
begin
if (valid_L = '1' and credit_in_L = '0' and credit_counter_L_out = 0 and credit_counter_L_in /= credit_counter_L_out) then
err_not_grant_L_or_credit_counter_L_out_zero_credit_counter_L_in_not_change <= '1';
else
err_not_grant_L_or_credit_counter_L_out_zero_credit_counter_L_in_not_change <= '0';
end if;
end process;
process (credit_in_L, valid_L, credit_counter_L_in, credit_counter_L_out)
begin
if (credit_in_L = '0' and valid_L = '0' and credit_counter_L_in /= credit_counter_L_out) then
err_not_credit_in_L_not_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '1';
else
err_not_credit_in_L_not_grant_L_credit_counter_L_in_credit_counter_L_out_equal <= '0';
end if;
end process;
END;
|
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.