MOV A，R2 RLC A MOV R2，A MOV A，R3 ADDC A，R3 DA A MOV R3，A DJNZ R7，LOOP MOV A, R3 MOV R4, A
MOV R7，#200
DELAY1: MOV R6，#100 DELAY2: MOV R5，#100 DELAY3: MOV A，R3 MOV R4, A CLR P3.1
MOV R1, #100 DJNZ R1, $ SETB P3.0
MOV R1, #100 DJNZ R1, $ MOV A, #0F0H
ANL A, R4 SWAP A
ADD A, #31 MOVC A, @A+PC MOV P1, A MOV A, R3 MOV R4, A CLR P3.0 MOV R1, #100 DJNZ R1, $ SETB P3.1
MOV R1, #100 DJNZ R1, $ MOV A，#0FH
ANL A，R4 ADD A，#9 MOVC A，@A+PC MOV P1，A
DJNZ R5，DELAY3 DJNZ R6，DELAY2 DJNZ R7，DELAY1 RET
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DB 0C0H，0F9H，0A4H，0B0H，99H DB 92H，82H，0F8H，80H，90H END
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