191问答库 > 89C51单片机P1.0引脚接的发光二极管先点亮至P1.1～P1.7引脚所接的发光二极

89C51单片机P1.0引脚接的发光二极管先点亮至P1.1～P1.7引脚所接的发光二极

2025-03-15 16:29:19
推荐回答（1个）
回答1：

ORG 0000H
LJMP MAIN
ORG 0030H
MAIN:
MOV R2,#8
MOV A,#0FEH
LOOP1:
MOV P1,A
LCALL DELAY
RL A
DJNZ R2,LOOP1
MOV R2,#8
LOOP2:
MOV P1,A
LCALL DELAY
RR A
DJNZ R2,LOOP2
SJMP MAIN
END

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