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DCC_Bit_1 TB

This commit is contained in:
Adrien Bourmault 2022-03-21 12:19:58 +01:00
parent 621a211a97
commit 9e78c99990
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GPG Key ID: 6EB408FE0ACEC664
2 changed files with 38 additions and 12 deletions
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14
DCC_Bit_1.vhd
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@ -17,7 +17,7 @@ architecture behaviour of dcc_bit_1 is
type state is (idle, out_0, out_1);
signal cs, fs : state;
signal inc_cpt : std_logic;
signal cpt : integer range 0 to 126;
signal cpt : integer range 0 to 116;
signal out_value : std_logic := '0';
begin
dcc_1 <= out_value;
@ -25,7 +25,9 @@ begin
--MAE
process(clk_100MHz, reset)
begin
if reset = '1' then fs <= idle;
if reset = '1' then
fs <= idle;
elsif rising_edge(clk_100MHz) then
if cs = idle then
@ -42,15 +44,17 @@ begin
out_value <= '0';
if cpt > 57 then fs <= out_1;
if cpt >= 57 then
fs <= out_1;
end if;
elsif cs = out_1 then
out_value <= '1';
if cpt > 125 then
if cpt >= 115 then
fs <= idle;
out_value <= '0';
fin <= '1';
inc_cpt <= '0';
end if;
@ -72,6 +76,8 @@ begin
if inc_cpt = '1' then
cpt <= cpt + 1;
else
cpt <= 0;
end if;
end if;

28
DCC_Bit_1_TB.vhd
View File

@ -32,11 +32,31 @@ begin
process
begin
reset <= '0';
wait for 20 ns;
go <= '1';
wait for 30 ns;
go <= '0';
for i in 0 to 50 loop
go <= '1';
wait until rising_edge(clk_100MHz);
go <= '0';
assert(dcc_1 = '0') report "dcc_1 invalide avant 58us, est à 1 (test"
& integer'image(i) & ")";
wait until rising_edge(dcc_1) for 58 us;
assert(dcc_1 = '1') report "dcc_1 invalide après 58us, est à 0 (test"
& integer'image(i) & ")";
wait until falling_edge(dcc_1) for 58 us;
assert(dcc_1 = '0') report "dcc_1 invalide après 58us * 2, est à 1 (test"
& integer'image(i) & ")";
--assert(false) report "test" & integer'image(i) severity warning;
assert(fin = '1') report "fin invalide, est à 0";
wait until rising_edge(clk_1MHz);
end loop;
assert(false) report "Test DCC_Bit_1 terminé" severity warning;
wait;
end process;