displaysel.vhd

电子打铃器 在max plus 2 下编译通过

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
use ieee.std_logic_arith.all;

ENTITY displaysel IS
	PORT(
		jishusel: IN STD_LOGIC_VECTOR(2 DOWNTO 0);
		selectcon: OUT STD_LOGIC_VECTOR(2 DOWNTO 0));
END displaysel;

ARCHITECTURE a OF displaysel IS
	BEGIN
	
	PROCESS (jishusel)
	BEGIN
			IF	jishusel(0)='1'THEN
				selectcon<="100";
			
			ELSIF jishusel(1)='1'   THEN
				selectcon<="010";
			ELSIF jishusel(2)='1' THEN
				selectcon<="001";
			ELSE 
				selectcon<="000";

			END IF;
	END PROCESS ;
	
	
		
END a;