CSDA BIT P3.2
WRR BIT P3.6
WELA BIT P2.7
DULA BIT P2.6
ORG 0000H
LOOP0:
MOV P0,#0FFH ;关数码管显示
SETB WELA
CLR WELA
CLR DULA
SETB CSDA
SETB WR
MOV A,#0
LOOP1:
MOV P0,A
CLR CSDA
CLR WRR
LCALL DELAY
SETB WRR
SETB CSDA
INC A
SJMP LOOP1
DELAY: ;延时
SETB RS1
MOV R2,#04H
DELAY2:
MOV R1,#10
DELAY1:
MOV R0,#250
DELAY0:
NOP
NOP
DJNZ R0,DELAY0
DJNZ R1,DELAY1
//DJNZ R2,DELAY2
CLR RS1
RET
END
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