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Fixed Timing error with debounce.vhd #2

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Fixed Timing error with debounce.vhd #2

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81 changes: 44 additions & 37 deletions sd_v3/source/vhdl_lib/debounce.vhd
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Original file line number Diff line number Diff line change
Expand Up @@ -63,49 +63,56 @@ begin
debounced <= last;

debounce_process: process(rst, clk, key)
begin
if rst = '0' then
s_tick <= '0';
val_s <= 0;
last <= key;
else
--#############################
--#############################
if last = key then
val_s <= 0;
begin

elsif clk'event and clk = '1' then
if clk'event and clk = '1' then
if clk_en = '1' then
--======================
case val_s is
when n =>
---------------
if key = '0' then
s_tick <= '1';
end if;
last <= key;
val_s <= 0;
---------------
when others =>
val_s <= val_s + 1;
end case;
--======================

--======================
case val_s is
when n =>
---------------
if key = '0' then
s_tick <= '1';
end if;
last <= key;
val_s <= 0;
---------------
when others =>
val_s <= val_s + 1;
end case;
--======================

end if;
if rst = '0' then
s_tick <= '0';
val_s <= 0;
last <= key;
else
if last = key then
val_s <= 0;
end if;
end if;
end if;
end if;

--#############################
--#############################
if clk'event and clk = '1' then
if clk_en = '1' then
--#############################
--#############################
if clk'event and clk = '1' then
if clk_en = '1' then
--======================
if s_tick = '1' then
s_tick <= '0';
s_tick <= '0';
end if;
--======================
end if;
end if;

end if;
end process;
end debounce_a;
if rst = '0' then
s_tick <= '0';
val_s <= 0;
last <= key;
else
if last = key then
val_s <= 0;
end if;
end if;
end if;
end process;
end debounce_a;