DS18B20数字温度计的设计

;             DB 06H, 07H, 08H, 08H, 09H, 09H
DISPBCD:MOV A , TEMPLC
         ANL A , #0FH
         MOV 70H , A
         MOV A , TEMPLC
         SWAP A
         ANL A , #0FH
         MOV 71H , A
         MOV A , TEMPHC
         ANL A , #0FH
         MOV 72H , A
        MOV A , TEMPHC
        SWAP A
        ANL A , #0FH
        MOV 73H , A
        MOV A , TEMPHC
        ANL A , #OF0H
        CJNZ A , #010H , DISPBCD0
        SJMP DISPBCD2
DISPBCD0: MOV A , TEMPHC
        ANL A , #0FH
        JNZ DISPBCD2
        SWAP   A
        ANL A , #0FH
        MOV 73H , #0AH
        MOV 72H , A
DISPBCD2: RET
DISP1: MOV R1 , #70H
        MOV R5 , #0HEH
PLAY: MOV P1 , #0FFH
        MOV A , R5
        MOV P3 , A
        MOV A , @R1
        MOV DPTR , #TAB
        MOVC A , @A+DPTR
        MOV P1 , A
        MOV A , R5
       JB ACC.1 , LOOP5
       CLR P1.7
LOOP5: LCALL DL1MS
        INC R1
        MOV A , R5
        JNB ACC.3 , ENDOUT
        RL A
        MOV R5 , A
        AJMP PLAY
ENDOUT: MOV   P1 , #0FFH
         MOV P3 , #0FFH
         RET
TAB: DB 0C0H, 0F9H, 0A4H, 99H, 92H, 82H, 0F8H, 80H, 90H, 0FFH, 0BFH,
DL1MS: MOV R6 , #14H
DL1: MOV R7 , #19H
DL2: DJNZ R7 , DL2
      DJNZ R6 , DL1
      RET
HEX2

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DS18B20数字温度计的设计(八)