红绿灯的控制计算变化时间程序源代码

红绿灯的控制计算变化时间程序源代码:

-- MAX+plus II VHDL Example
-- Conditional Signal Assignment
-- Copyright (c) 1994AlteraCorporation

Library IEEE ;
use IEEE.std_logic_1164.all ;

ENTITY condsig IS
PORT
(
input0, input1, sel : IN BIT;
output : OUT BIT
);
END condsig;

ARCHITECTURE maxpld OF condsig IS
BEGIN

output <= input0 WHEN sel = '0' ELSE input1;

END maxpld;