control.vhd

交通灯控制器的VHDL设计,能控制十字路口的红绿灯转换,通过目标芯片EPF10KLC84-4验证

library ieee;
use ieee.std_logic_1164.all;


entity control is
port ( clk : in std_logic;
      clks :out  std_logic);
end control;

architecture aa of control is
signal count : integer range 0 to 41; 
begin
 PROCESS (clk)
   BEGIN
      IF clk'event and clk='1' THEN
        if count=40 then count<=0; 
           else count<=count+1; 
        end if;
      END IF;
END PROCESS;

 PROCESS (count)
   BEGIN
     IF count=40 then clks<='1';
        else clks<='0'; 
     END IF;
END PROCESS;
end aa;