p11_2.asm

单片机原理与应用实例教程 单片机原理与应用实例教程

		ORG		0000H
		LJMP	MAIN

		ORG		000BH
		LJMP	INT_T0	
		
		ORG		4100H

INT_T0:	INC R0
		CJNE R0, #10, RETURN
		MOV R0, #0
		INC R1
		CJNE R1, #10, RETURN
		MOV R1, #0
		INC R2
		CJNE R2, #6, RETURN
		MOV R2, #0
		INC R3
		CJNE R3, #10, RETURN
		MOV R3, #0	
RETURN:	MOV TH0, #3CH
		MOV TL0, #0B0H
		RETI

DELAY:	MOV R6,#0FFH
DL:		DJNZ R6,DL

		RET

TAB:	DB 40H, 4FH, 24H, 30H, 19H
		DB 12H, 02H, 78H, 00H, 10H
MAIN:	MOV DPTR, #TAB
		MOV R0, #0H
		MOV R1, #0H
		MOV R2, #0H
		MOV R3, #0H
		MOV TMOD, #00000001B
		MOV TH0, #3CH
		MOV TL0, #0B0H
		SETB EA
		SETB ET0
		SETB TR0
LOOP:	MOV P3, #1000B
		MOV A, R0
		MOVC A, @A+DPTR
		MOV P0, A
		ACALL DELAY

		MOV P3, #0100B
		MOV A, R1
		MOVC A, @A+DPTR
		MOV P0, A
		ACALL DELAY

		MOV P3, #0010B
		MOV A, R2
		MOVC A, @A+DPTR
		MOV P0, A
		ACALL DELAY

		MOV P3, #0001B
		MOV A, R3
		MOVC A, @A+DPTR
		MOV P0, A
		ACALL DELAY
		
		AJMP LOOP



		END