--- Quote Start ---
True parity generator would be:
process (a, b, c)
odd_out <= ((a xor b) xor c);
even_out <= (not odd_out);
end process;
If you actually want both outputs low when inputs are all low, then
process (a, b, c)
if (a or b or c) then
odd_out <= ((a xor b) xor c);
even_out <= (not odd_out);
else
odd_out <= '0';
even_out <= '0';
end if;
end process;
--- Quote End ---
When i tried your code, it gives 4 errors when i tried to compile.
Error: tyoe of identifier "a" does not agree with its usage as boolean type
Error: tyoe of identifier "b" does not agree with its usage as boolean type
Error: tyoe of identifier "c" does not agree with its usage as boolean type :(
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