timer_ring2.vhd

关于自动打铃器的程序设计。应该还是不错的哦！~

LIBRARY ieee;
USE ieee.std_logic_1164.all;
USE ieee.std_logic_UNSIGNED.all;
USE ieee.std_logic_ARITH.all;
ENTITY TIMER_RING2 IS

	PORT
	(
		RESET	: IN	STD_LOGIC;
		ONKEY	: IN	STD_LOGIC;      ---整点报时开关
		ALARM	: OUT	STD_LOGIC;
		hourhdis	: IN    	INTEGER RANGE 0 TO 2;
		hourldis	: IN    	integer range 0 to 9;
		minhdis		: IN        integer range 0 to 5;
		minldis		: IN	 	integer range 0 to 9;
		sechdis	    : IN	 	integer range 0 to 5;
		secldis		: IN		integer range 0 to 9);
		--RT		: IN		INTEGER ;
		--STOP		: IN		INTEGER);
	
   END TIMER_RING2  ;

ARCHITECTURE TIMER_RING2_ARC OF TIMER_RING2  IS
 	CONSTANT RT :INTEGER :=5;
 	CONSTANT STOP:INTEGER:=2;

 	BEGIN
		
		PROCESS(SECLDIS)
		VARIABLE CNT :INTEGER;
			BEGIN
			CNT:=SECHDIS*10+SECLDIS;
			IF RESET='1' THEN  --打铃高电平有