counter12test.vhd

来自「用于视频运动图像编码的HUFFMAN编码」· VHDL 代码 · 共 48 行

---------      电子系                 学号：J02301                姓名：张宗旺----
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;


entity COUNTER_BENCH is
end COUNTER_BENCH;


architecture BENCH of COUNTER_BENCH is

	component COUNTER12 is
		port	(RST,UPDOWN: in std_logic;
			CLK: in std_logic;
			COUNTER_Q: out std_logic_vector(3 downto 0));
	end component;


	signal CLK:std_logic:='0';
	signal RST,UPDOWN:std_logic;
	signal COUNTER_Q:std_logic_vector(3 downto 0);

begin 
	U1: entity work.COUNTER12(ALG) port map(RST,UPDOWN,CLK,COUNTER_Q); 
	RST<='0' ,'1' after 100 ns;
	CLK<= not CLK after 50 ns;	
	UPDOWN_WAVER: process
	begin 
		UPDOWN<='1';
		wait for 2000 ns;
		while true loop
		UPDOWN<='0';
		wait for 1500 ns;
		UPDOWN<='1';
		wait for 50 ns;
		end loop;
		
	end process;
	
	
	
end BENCH;