keytest.vhd

用于视频运动图像编码的HUFFMAN编码

---------      电子系                 学号：J02301                姓名：张宗旺----

library ieee;
use ieee.std_logic_1164.all;

entity KEY_TEST is
	port(	KEY_IN: in std_logic;
		CLK: in std_logic;
		TEST_OUT: out std_logic;
		RST:in std_logic	);
end KEY_TEST;

architecture ALG of KEY_TEST is
signal COUNTER: integer range 0 to 100;
begin
	process(CLK,RST)
	
	begin 
	if RST='0' then 
		TEST_OUT<='0';
	else	
		if CLK'event and CLK='1' then
			if KEY_IN='1' then
				COUNTER<=COUNTER+1;
				TEST_OUT<='0'
			else
				if COUNTER<10 then
					
					COUNTER<=0;
				else
					COUNTER<=0;
					TEST_OUT<='1';
				end if;
			end if;
		end if;
	end if;
	end process;
end ALG;