> -----Original Message-----
> From: Bob Axtell [SMTP:cr_axtell@YAHOO.COM]
> Sent: Monday, June 23, 2003 2:19 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [PIC]: Byte to Digits
>
> Repeatedly dividing by 10, extracting each place as it spits out, is a
> good
> way to do this but consumes incredible # of machine cycles. If you have to
> generate lots of these, you can easily overrun your time budget.
>
> I use a compromise routine that (for an 8-bit value) subtracts off the100s
> place character, then uses a lookup table to extract a packed BCD char, to
> compose the last two characters. This is extremely fast- about 30
> instruction cycles to extract and compose all three ASCII characters.
>
> --Bob
>
Scott Dattalo's 3 digit BCD code on http://www.piclist.com runs in about 28
cycles.  You would then have to add the ASCII '0' offset to each value, but
the final result would still be very fast and without using any lookup
tables.

Mike


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