p7_1.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		4100H
MAIN:	MOV A, #0FEH    		;左边第一个开始显示
LOOP:	MOV P1, A
        RL A					;左移
        ACALL DELAY
		ACALL DELAY
		ACALL DELAY
		ACALL DELAY
		ACALL DELAY
        AJMP LOOP

DELAY:	MOV R7,#82H		;延迟程序
DL1:	MOV R6,#0FFH
DL2:	NOP
		DJNZ R6,DL2
		DJNZ R7,DL1
		RET
		
		END