帮忙看下，显示程序只显示十位，不显示个位（P2.5是十位位选，P2.4为个位位选）...

ID:62923 · 发表于 2014-6-15 13:35

ORG  0000H
AJMP  MAIN
MAIN: MOV  R2,#50
   CLR C
D0:  CALL ADCINT
      CALL DISP
D1: JNB P2.3,KEY1
JNB P2.2,KEY2
LJMP D0

//A/D转换程序
ADCINT :MOV R1,#30H
      MOV DPTR,#7FF8H
      MOV R7,#08H
  ADC: MOVX  @DPTR,A
HER: JNB  P3.0,HER
      MOVX  A,@DPTR
      MOV @R1,A
      INC DPTR
      INC R1
      DJNZ  R7,ADC
   RETI

显示程序
DISP: MOV  A,R2
   MOV  B,#10
   DIV  AB
   MOV  20H,A
   MOV  21H,B
   MOV DPTR,#TABLE

   CLR  P2.4       //十位显示
   CLR  P2.5
   MOV  A,20H
   MOVC  A,@A+DPTR
   MOV  P1,A
   SETB P2.4
   CALL  DELAY

   CLR  P2.4    //个位显示
   MOV DPTR,#TABLE
   MOV A,21H
   MOVC  A,@A+DPTR
   MOV P1,A
   SETB P2.5
   CALL  DELAY
   RET
KEY1:  CALL DELAY1
   JB  P2.3,D1
   MOV A,R2
   INC A
   MOV R2,A
   CALL DISP
   RET

KEY2:  CALL DELAY1
   JB  P2.2,D1
   MOV A,R2
   DEC A
   MOV R2,A
   RET

DELAY: MOV  R6,#5
D2: MOV  R5,#249
DL0: NOP
   NOP
   DJNZ R5,DL0
   DJNZ R6,D2
   RET
DELAY1: MOV  R6,#10
D3: MOV  R5,#249
DL1: NOP
   NOP
   DJNZ R5,DL0
   DJNZ R6,D3
   RET
TABLE: DB  0C0H,0F9H,0A4H,0B0H,99H
      DB  92H,82H,0F8H,80H,90H
      END

ID:63747 · 发表于 2014-7-17 21:51

看到汇编就头疼，楼主学C吧

ID:66645 · 发表于 2014-9-27 09:58

显示程序没问题

ID:19715 · 发表于 2014-9-27 12:55

小错误：
显示程序
DISP:  MOV  A,R2
         MOV  B,#10
         DIV  AB
         MOV  20H,A
         MOV  21H,B
         MOV DPTR,#TABLE

      MOV  A,20H
      MOVC  A,@A+DPTR
      MOV  P1,A
      CLR  P2.5       //十位显示
      CALL  DELAY
      SETB P2.5

      MOV A,21H
      MOVC  A,@A+DPTR
      MOV P1,A
      CLR  P2.4    //个位显示
      CALL  DELAY
      SETB P2.4
      RET

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