zldj.asm

达盛单片机试验箱

CH0			BIT		P1.0
CH1			BIT		P1.1

			ORG		0000H
		
			AJMP	MAIN
		
			ORG		0030H
			
MAIN:		MOV		P1,#00H
			CLR		CH0		;正转	
			SETB	CH1	
			CALL	DELAY
			CLR		CH0		;停止
			CLR		CH1
			CALL	DELAY		
			SETB	CH0		;反转
			CLR		CH1
			CALL	DELAY
			CLR		CH0		;停止
			CLR		CH1
			CALL	DELAY	
			AJMP	MAIN

DELAY:		MOV		R5,#2FH
DELAY2:		MOV		R6,#0FFH
DELAY1:		MOV		R7,#0FFH
			DJNZ	R7,$
			DJNZ	R6,DELAY1
			DJNZ	R5,DELAY2
			RET
		
			END