推荐回答（1个）
两个地方有问题，修改如下：
ORG 00H
LJMP START
;//ORG 30H
;//ORG 00H
;//LJMP START
ORG 30H
START:
此处加入堆栈设置指令
MOV A, #0FFH
LOOP: RL A
DEC A
MOV P1, A
LCALL DELAY
LJMP LOOP
DELAY: MOV R5, #5
DELAY01: MOV R6, #200
DELAY02: MOV R7, #250
DELAY03:
DJNZ R7, DELAY03
DJNZ R6, DELAY02
DJNZ R5, DELAY01
RET
END
此外，硬件上检查复位电路，检查晶振，检查供电电源，都正确后，不会有问题的。
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