toptest.vhd

用于视频运动图像编码的HUFFMAN编码

library ieee;
use ieee.std_logic_1164.all;
use work.roms.all;
use work.MYfunction.all;
use ieee.std_logic_unsigned.all;

entity TOP_TEST is
	
end TOP_TEST;

architecture  bench of TOP_TEST is
	component ROM_TOP
		port(	ADDR:in std_logic_vector(2 downto 0);
			RD,CLK:in std_logic;
			DATA_OUT:out std_logic_vector(7 downto 0));
	end component;
	
	signal ADDR:std_logic_vector(2 downto 0);
	signal DATA_OUT:std_logic_vector(7 downto 0);
	signal RD,CLK1,CLK:std_logic:='0';
	
	for DUT:ROM_TOP use entity work.ROM_TOP(BEHAVIOR); 
	
	
begin
	DUT: ROM_TOP port map (ADDR,RD,CLK,DATA_OUT);
	
	RD<= not RD after 100 ns;
	CLK1<=not CLK1 after 50 ns;
	CLK<=CLK1 and RD;
	
	ADDR_GEN:process
		variable CNT:std_logic_vector(2 downto 0):="000";
	
	begin
		ADDR<=CNT;
		wait for 200 ns;
		if CNT="111" then 
			CNT:="000";
		else
			CNT:=CNT+1;
		end if;
	end process;
end BEnch;