s16test.vhd

用于视频运动图像编码的HUFFMAN编码

library ieee;
	use ieee.std_logic_1164.all;
	use ieee.std_logic_unsigned.all;
	use ieee.std_logic_arith.all;
	
	
entity SHIFTER_OUT_16_TEST is
	
end SHIFTER_OUT_16_TEST;

architecture  BENCH of SHIFTER_OUT_16_TEST is
	
	component SHIFTER_OUT_16
			port(	CLK:	in 	std_logic;
				RESET,LOAD:in std_logic;
				DIN:	in 	std_logic_vector(15 downto 0);
				DOUT:	out std_logic				);
	end component;

	signal RESET,CLK,LOAD:std_logic:='0';
	signal DIN :std_logic_vector(15 downto 0);
	signal DOUT:std_logic;
	
	for DUT: SHIFTER_OUT_16 use entity work.SHIFTER_OUT_16(BEHAVIORAL);
	
begin
	DUT: SHIFTER_OUT_16 port map(CLK,RESET,LOAD,DIN,DOUT);
	LOAD<=not LOAD after 2000 ns;
	CLK<=not CLK after 50 ns;
	RESET<='1' after 80 ns;
	process
		variable CNT: std_logic_vector(15 downto 0):="0000000000000000";
	begin
		DIN<=CNT;
		wait for 100 ns;	
		if CNT="10101111" then
			CNT:="0000000000000000";
		else 
			CNT:=CNT+1;
		end if;	
	end process ;
	
end BENCH;