priority_encoder82.vhd

计数器、频率计、优先编码器、数码管扫描电路、数据选择器

library ieee;
use ieee.std_logic_1164.all;

entity priority_encoder82 is
	port ( a: in std_logic_vector(7 downto 0);
		   b: out std_logic_vector(2 downto 0));

end priority_encoder82;
architecture a of priority_encoder82 is
begin
priority:process(a)
begin
	if a(0)='1' then b<="000";end if;
	if a(1)='1' then b<="001";end if;
	if a(2)='1' then b<="010";end if;
	if a(3)='1' then b<="011";end if;
	if a(4)='1' then b<="100";end if;
	if a(5)='1' then b<="101";end if;
	if a(6)='1' then b<="110";end if;
	if a(7)='1' then b<="111";end if;
end process;
end a;