666.asm

8位AD转换器的使用加液晶显示,转换器是八通道并行转换器

    ORG 00H
    AJMP MAIN
    ORG 30H
MAIN:MOV SP,#60H
LOOP:LCALL AD
     LCALL CH
     LCALL SH
     LCALL DISPLAY
     LCALL DEL300MS
     AJMP LOOP
  AD:CLR P2.0
     CLR P2.1
     SETB P2.1
     SETB P2.4
     CLR P2.4
     JNB P2.3,$
     CLR P2.2
     SETB P2.2
     NOP
     NOP
     NOP
      MOV A,P1
     RET
  CH: 
      MOV R1,A
      MOV R2,#0C5H
      MOV R3,#0
      MOV R4,#0
      MOV 46H,#08H
MULLOOP1:
      CLR C
      MOV A,R3
      RLC A
      MOV R3,A
      MOV A,R4
      RLC A
      MOV R4,A
      MOV A,R2
      RLC A
      MOV R2,A
      JNC MULLOOP2
      CLR C
      MOV A,R3
      ADD A,R1
      MOV R3,A
      MOV A,R4
      ADDC A,#00H
      MOV R4,A
 MULLOOP2:
      DJNZ 46H,MULLOOP1
      RET
 SH:MOV 46H,#10H
    MOV R2,#03H
    MOV R1,#0E8H
    MOV R5,#0
    MOV R6,#0
 DIVLOOP1:MOV A,R3
          RLC A
          MOV R3,A
          MOV A,R4
          RLC A
          MOV R4,A
          MOV A,R5
          RLC A
          MOV R5,A
          MOV A,R6
          RLC A
          MOV R6,A
          CLR C
          MOV A,R5
          SUBB A,R1
          MOV B,A
          MOV A,R6
          SUBB A,R2
          JC DIVLOOP2
          MOV R5,B
          MOV R6,A
 DIVLOOP2:CPL C
          DJNZ 46H,DIVLOOP1
          MOV A,R3
          RLC A
          MOV R3,A
          MOV A,R4
          RLC A
          MOV R4,A
          RET
 DISPLAY:MOV DPTR,#TAB
         MOV A,R3
         CLR OV
         MOV B,#10
         DIV AB
         MOVC A,@A+DPTR
         MOV P0,A
         MOV A,B
         MOVC A,@A+DPTR
         MOV SBUF,A
         JNB TI,$
         CLR TI
         RET
    ;******延时300MS********
;^^^误差:超出391微秒^^^
DEL300MS: MOV R5,#0FFH
DL300MS0: MOV R6,#0EBH
DL300MS1: MOV R7,#01H
          DJNZ R7,$
          DJNZ R6,DL300MS1
          DJNZ R5,DL300MS0
          RET
     
   TAB: DB 0C0H,0F9H,0A4H,0B0H,099H
        DB 092H,082H,0F8H,080H,090H

      END