Revision 154
Added by markw about 11 years ago
| chameleon/chameleon_c64_joykeyb.vhd | ||
|---|---|---|
|
signal cnt : unsigned(3 downto 0) := (others => '0');
|
||
|
signal col : integer range 0 to 7 := 0;
|
||
|
signal keys_reg : unsigned(63 downto 0) := (others => '1');
|
||
|
signal last_keys_reg : unsigned(63 downto 0) := (others => '1');
|
||
|
signal approved_keys_reg : unsigned(63 downto 0) := (others => '1');
|
||
|
signal joystick1_reg : unsigned(4 downto 0);
|
||
|
signal joystick1_prev_reg : unsigned(4 downto 0);
|
||
| ... | ... | |
|
if enable_4player then
|
||
|
state <= READ_JOY34;
|
||
|
end if;
|
||
|
if ((joystick1_reg and d(4 downto 0) and joystick1_prev_reg and joystick2_prev_reg) = "11111") then
|
||
|
last_keys_reg <= keys_reg;
|
||
|
if ((joystick1_reg and d(4 downto 0) and joystick1_prev_reg and joystick2_prev_reg) = "11111" and last_keys_reg = keys_reg) then
|
||
|
approved_keys_reg <= keys_reg;
|
||
|
end if;
|
||
|
joystick2_prev_reg <= d(4 downto 0);
|
||
Also available in: Unified diff
keyboard must match for 2 cycles and joystick must match for 2 cycles (2 loops of state machine). This seems to pretty much prevent false keypresses. Of course cannot type when stick moved...