产品名称：里程表，电压表LCD驱动HT1621的PIC单片机源代码

13556886847  陈先生 LCD驱动HT1621的PIC单片机源代码

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STATUS  EQU     3H FSR     EQU     4H RB      EQU     6H RC      EQU     7H OPTIONA EQU     81H TRISB   EQU     86H TRISC   EQU     87H GENR0   EQU     053H GENR1   EQU     054H WD_RG   EQU     055H DA_AG0  EQU     056H      ;SEG0 SEG1 DA_AG8  EQU     05EH      ;SEG16 SEG17 ;............................. C       EQU     0 Z       EQU     2 RP0     EQU     5 RP1     EQU     6 CS      EQU     2     WDA     EQU     5     ;RC,5数据线 WCLK    EQU     1     ;RB,1写时钟线 RCLK    EQU     4     ;RB,4读时钟线 ;.............................. ORG     0H GOTO    START ;............................... START   BSF     STATUS,RP0         MOVLW   00H         MOVWF   TRISB         MOVLW   81H         MOVWF   TRISC         BCF     STATUS,RP0         MOVLW   12H         MOVWF   RB         BSF     RC,2         BSF     RC,5         MOVLW   4         MOVWF   OPTIONA LOOP    NOP         CALL  X_QUAN         NOP         GOTO   LOOP ;............................ X_QUAN               MOVLW   8H              CALL    ON_LCD   ;TRANSMIT TH1621 WORK MODE VALUE                                      MOVLW   9H       ;显示9位LCD           CALL    DIS_DATA                 RETURN ;............................ ON_LCD  MOVWF GENR1         BCF     RC,2 MOVLW 80H  ;HI_W3 BITS:100 MOVWF WD_RG         MOVLW 3        ;3位命令100 CALL TRAM_DATA        ON_LCD0 MOVF GENR1,0 CALL ON_VALUE ;查表初始化LCD MOVWF WD_RG MOVLW 8        ;送8位查表值 CALL TRAM_DATA              BCF     RC,WDA         NOP         NOP         BCF     RB,1         NOP         NOP         BSF     RB,1         BSF     RC,2 DECFSZ GENR1,1 GOTO ON_LCD+1        RETURN ;........................ ON_VALUE ADDWF 2         NOP RETLW 03H ;LCD ON RETLW 01H ;SYS ON RETLW 08H ;TONE OFF RETLW 29H ;BISA1/3  4 COM       RETLW 18H ;256K             RETLW 05H ;WDT DISABLE RETLW 80H ;/IRQ DISABLE  * RETLW 0E3H ;NORMAL MODE   * ;................................ ;TRANSMIT BITS SUBROUTINE TRAM_DATA         BCF     STATUS,0      MOVWF GENR0        BCF RB,1         RLF WD_RG         BTFSS 3,0 GOTO $+3 BSF RC,WDA GOTO $+2 BCF RC,WDA                     BSF RB,1        DECFSZ GENR0,1 GOTO TRAM_DATA+2                RETURN ;....................... DIS_DATA        MOVWF GENR1   ;9位LCD         BCF     RC,2 MOVLW 0A0H MOVWF WD_RG ;WRITE CONTROL MOVLW 3H      ;3位写命令101 CALL TRAM_DATA        MOVLW 00 MOVWF WD_RG ;WRITE ADDRESS MOVLW 6H      ;6位地址   CALL TRAM_DATA ;               DIS_DATA0 MOVLW 0FFH MOVWF WD_RG ;DISPLAY CODE MOVLW 8       ;8段数据 CALL TRAM_DATA DECFSZ GENR1,1 GOTO DIS_DATA0         BSF     RC,2 RETLW 0         END

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