Ted Linn wrote:
>
> One of the things I need to get a 16C57 to do is to convert a 32 bit binary
> number to ascii for output to an LCD display.  I know an algorithm for doing
> this but being new to this pic world I wondered if anyone would share code
> or offer some suggestions or 'tricks' that might be helpful for doing this.
>
> Thanks

This routine converts a 32 bit binary number to BCD compacted,
to convert to ASCII just split the nibbles and add '0'
;******************************************************
; BIN2BCD
;RECEIVE BINARY NUMBER IN REG4,REG3,REG2,REG1 AND RETURN
DIG4,DIG3,DIG2,DIG1 AS BCD
;******************************************************
BIN2BCD
        BCF     STATUS,C
        MOVLW   32
        MOVWF   COUNT
        CLRF    DIG6
        CLRF    DIG5
        CLRF    DIG4
        CLRF    DIG3
        CLRF    DIG2
        CLRF    DIG1
LOOP24  RLF     REG1,1
        RLF     REG2,1
        RLF     REG3,1
        RLF     REG4,1
        RLF     DIG1,1
        RLF     DIG2,1
        RLF     DIG3,1
        RLF     DIG4,1
        RLF     DIG5,1
        RLF     DIG6,1
        DECFSZ  COUNT,1
        GOTO    ADJDEC
        RETURN
ADJDEC
        MOVLW   DIG1
        MOVWF   FSR
        CALL    ADJBCD
        MOVLW   DIG2
        MOVWF   FSR
        CALL    ADJBCD
        MOVLW   DIG3
        MOVWF   FSR
        CALL    ADJBCD
        MOVLW   DIG4
        MOVWF   FSR
        CALL    ADJBCD
        GOTO    LOOP24

ADJBCD
        MOVLW   3
        ADDWF   0,W
        MOVWF   TEMP
        BTFSC   TEMP,3
        MOVWF   0
        MOVLW   0x30
        ADDWF   0,W
        MOVWF   TEMP
        BTFSC   TEMP,7
        MOVWF   0
        RETLW   0


Octavio
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Octavio Nogueira
e-mail:   nogueira@mandic.com.br
homepage: http://ourworld.compuserve.com/homepages/tato
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