lc2.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;

entity lc2 is
port(
		en, ien: in std_logic;
		oen: out std_logic;
		reset: in std_logic
		
	);
	end lc2;

architecture rtl of lc2 is
signal temp: std_logic_vector(1 downto 0);
begin
	process(ien)
		begin 
			if ien'event and ien='1' then
				if reset='1' then
					temp<="00";
				else
					temp<=temp+1;
				end if;
			end if;
			
	end process;
	oen<=temp(0) and en;
	
end rtl;