流水灯1.asm

单片机应用的基本程序

	ORG 0000H
        AJMP START1
        ORG 000BH
        LJMP BRT
START1: MOV A,#01H
        MOV P1,#01H
        MOV P0,#0FEH        
        SETB EA
        SETB ET0
        SETB PT0        
        MOV TMOD,#01
 START: MOV TH0,#3CH
        MOV TL0,#0B0H
        MOV R0,#14H
        SETB TR0
 LOOP:  JNB TF0,LOOP
 BRT:   DJNZ R0,NEXT
        CLR TR0
        RL A
        MOV P1,A
        CPL A
        MOV P0,A
	CPL A
        AJMP L4
 NEXT:  MOV TH0,#3CH
        MOV TL0,#0B0H
        RETI
 L4:    LJMP START
        END