60秒倒計時程序+仿真圖

ID:250103 · 發(fā)表于 2017-11-16 21:40

      ORG 0000H
         SJMP  STAR
         ORG 001BH
         SJMP  TLS
         ORG 30H
STAR: SETB  P3.0
         MOV R2,#0
         MOV R4,#20
         MOV IE,#88H
         MOV TMOD,#10H
         MOV TH1,#3CH
         MOV TL1,#0B0H
         SETB  TR1
         MOV A,R2
         MOV B,#10
         DIV AB
         ACALL LED7
         MOV P1,A
         MOV A,B
         ACALL LED7
         MOV P2,A
         SJMP $
TLS: MOV TH1,#3CH
         MOV TL1,#0B0H
         DJNZ  R4,T1S0
         MOV R4,#20
         DJNZ  R2,T1S1
         CLR TR1
         CLR P3.0
         SJMP  T1S1
T1S0: RETI
T1S1: MOV A,R2
         MOV B,#10
         DIV AB
         ACALL LED7
         MOV P1,A
         MOV A,B
         ACALL LED7
         MOV P2,A
         RETI
LED7:  INC A
         MOVC A,@A+PC
         RET
         DB 0C0H,0F9H,0A4H,0B0H
         DB 99H,92H,82H,0F8H
         DB 80H,90H,88H,83H
         DB 0C6H,0A1H,86H,8EH
         END

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