BEGIN:
ORL 0B1H, #01EH ;P3CON 0x1e ;初始化P3.1-4为输出
ORL 0C1H, #00FH ;C:P4CON(0xC1)初始化P4.0-3为输出
LOOP:
CPL 0xC0.0 ;取反,闪灯
CPL 0xC0.1
CPL 0xB0.2
ACALL DELAY
AJMP LOOP ;(5)跳转到第一句LOOP处
;以延时下子程序
;DELAY--------------------------
DELAY:
MOV R7, #200
DELAYLOOP1:
MOV R6, #200
DELAYLOOP2:
MOV R5, #100
DELAYLOOP3:
NOP
DJNZ R5, DELAYLOOP3
DJNZ R6, DELAYLOOP2
DJNZ R7, DELAYLOOP1
RET
END
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