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SX Microcontroller Radix Math Method


8 bit binary to 3 digit ASCII

From: Scott Dattalo 

W_to_ascii:

        mov     bin, W                  ;added

        clr     hundreds
        mov     W, <>bin                ;w  = A0*16+A1
        add     W, bin                  ;w  = A0+A1
        and     W, #00001111b           ;w  = A0+A1 % 16

        mov     tens_and_ones, W        ;tens_and_ones = A0+A1 % 16
        mov     W, #$16
        snb     DC                      ;if A0+A1 > 16
        add     tens_and_ones, W        ;  tens_and_ones  += 16
        mov     W, #$06
        snb     DC                      ;if tens_and_ones % 16 > 10
        add     tens_and_ones, W        ;  tens_and_ones  += 6

        add     tens_and_ones, W        ;tens_and_ones  += 6
        sb      DC                      ;if tens_and_ones < 10
        sub     tens_and_ones, W        ;  tens_and_ones  -= 6

        mov     W, #$16 - 1 + $6
        snb     bin.4
        add     tens_and_ones, W
        mov     W, #-$06
        sb      DC
        add     tens_and_ones, W
        mov     W, #$30
        snb     bin.5
        add     tens_and_ones, W

        mov     W, #$20
        snb     bin.7
        add     tens_and_ones, W

        mov     W, #$60
        snb     bin.6
        add     tens_and_ones, W

        add     tens_and_ones, W

        rl      hundreds
        sb      hundreds.0
        sub     tens_and_ones, W

        snb     bin.7
        inc     hundreds

                                        ;added (from here to bottom)
        mov     W, hundreds             ;
        or      W, #$30                 ;convert to ascii
        call    send_lcd                ;hundreds to LCD

        mov     W, <>tens_and_ones
        and     W, #$0f
        or     W, #$30                  ;always less than 0x0A
        call    send_lcd                ;tens to LCD

        mov     W, tens_and_ones
        and     W, #$0f
        or      W, #$30
        add     W, Hack
        call    send_lcd                ;ones to LCD

        ret

See also:

file: /Techref/scenix/lib/math/radix/bhp2ad-3d8b_sx.htm, 2KB, , updated: 2004/6/10 13:40, local time: 2012/2/10 16:03,
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<A HREF="http://www.piclist.com/techref/scenix/lib/math/radix/bhp2ad-3d8b_sx.htm"> SX Microcontroller Radix Math Method BCD half-packed to ASCII decimal 3 digit to 8 bit</A>
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Peter Todd has released source and sample projects for his artwork, including his 3d wireframe cube renderer for the PIC 18f6520 This includes examples of hardware developed with free software tools such as gEDA/gschem/PCB, SDCC, gputils and picp all on Linux. http://petertodd.ca/art/source-code/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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