用汇编语言编写一个按钮控制8个流水灯的亮灭

KEY EQU P3.2

LED EQU P1

ORG 0000H

LJMP MAIN

ORG 0030H

MAIN:

CLR 00H

MOV A,#0FEH

LOOP:

JB P3.2，LOOP1

JNB P3.2，$

CPL 00H

LOOP1：

JB 00H,LOOP2

MOV LED,#0FFH

SJMP LOOP

LOOP2:

MOV P1,A

RL A

LCALL DELAY

SJMP LOOP

DELAY:

MOV R2,#200

DLY1:

MOV R3,#250

DJNZ R3,$

DJNZ R2,DLY1

RET

END

LED EQU 30H

ORG 0000H

LJMP MAIN

ORG 0030H

MAIN:

MOV LED,#0FEH

MOV R2,#8

LOOP:

MOV P0,LED

MOV A,LED

RL A

MOV LED,A

JNB KEY,KEYC

DJNZ R2,LOOP

MOV R2,#8

LOOP1:

MOV P0,LED

MOV A,LED

RR A

MOV LED,A

JNB KEY,KEYC

DJNZ R2,LOOP1

SJMP LOOP

KEYC:

MOV P0,#00H

JNB KEY,KEYC

LJMP LOOP

END