Jinx's post is a completion (separating the 10s from the 1s) of
http://www.piclist.com/techref/microchip/math/radix/b2bhp-8b3d.htm by Scott
Dattalo which is probably the fastest single byte binary to decimal
conversion for the PIC. It doesn't appear, at a glance, to be much larger
than the loop methods and it does it in one pass; no loops. BAM! Done!

Anyone who can understand how it works is smarter than I. Scotts notes:
http://www.piclist.com/techref/method/math/radixs.htm

---
James.
 
 

> -----Original Message-----
> From: piclist-bounces@mit.edu 
> [mailto:piclist-bounces@mit.edu] On Behalf Of Jinx
> Sent: 2007 Mar 06, Tue 13:07
> To: Microcontroller discussion list - Public.
> Subject: Re: [PIC] seperate num into tens+units
> 
> ;number 0-255 to extract is in temp
> ;result in d100:d010:d011, add 0x30 to each to make ASCII
> 
> bin2bcd  clrf    d100
>          swapf   temp,w
>          addwf   temp,w
>          andlw   b'00001111'
>          skpndc
>          addlw   0x16
>          skpndc
>          addlw   0x06
>          addlw   0x06
>          skpdc
>          addlw  -0x06
> 
>          btfsc   temp,4 
>          addlw   0x16 - 1 + 0x6 
>          skpdc 
>          addlw  -0x06 
> 
>          btfsc   temp,5 
>          addlw   0x30 
> 
>          btfsc   temp,6 
>          addlw   0x60 
> 
>          btfsc   temp,7 
>          addlw   0x20 
> 
>          addlw   0x60 
>          rlf     d100,f 
>          btfss   d100,w 
>          addlw  -0x60 
> 
>          movwf   d011 
>          btfsc   temp,7 
>          incf    d100,f
> 
>          movf    d100,w
>          movwf   d100
> 
>          swapf   d011,w       ;separate 10s
>          andlw   0x0f
>          movwf   d010
> 
>          movlw   0x0f         ;separate 1s
>          andwf   d011,w
>          movwf   d011
> 
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