Hi Sabachka,

The following code converts a 8bit number to 3 digit decimal. The x into y
method as I call it is nothing more than subtracting until y begomes negative.

dec_8bit
 clrf   digits                          ;clear any previous data
 clrf   digits+1
 clrf   digits+2
 movf   data_in+1,w                             ;find number of hundreds
 movwf  MA
dec_8bit_100s
 movf         MA,w
 movwf  MB                              ;store data_in+1 - hundreds in MB
 movlw  100
 subwf  MA,f
 btfsc  STATUS,C
  incf  digits+2,f              ;find number of tens
 btfsc  STATUS,C
  goto  dec_8bit_100s
dec_8bit_10s
 movf         MB,w
 movwf  MA                              ;store data_in+1 -(hundreds + tens)
 movlw  10                              ;find number of tens
 subwf  MB,f
 btfsc  STATUS,C
  incf  digits+1,f
 btfsc  STATUS,C
  goto  dec_8bit_10s
 movf   MA,w                          ;whatever is left must be numver of ones
 movwf  digits

On second thought, if you're displaying in HEX this method is worthless :)

Glad I finally contributed to the list :)
Steve


> On Sat, Aug 16, 2003 at 05:41:08PM -0600, stesquib@MINES.EDU wrote:
> > When you go to display the second digit, for example if you want
> > to display 0x10, you send 0x10 to your lookup function instead of
> > 1! your program jumps over your code and wraps arround! (the PCL
> > is incremented 16 instead of 1.) You need to divide the number by
> > 16! You could save to a var and rotate right four times ect. I
>
> That is precisely what was breaking the program, it seems. I am now
> using some of your suggestion by using ANDLW 0x0F after a SWAPF for
> the digits that will end up on the left half of each pair.
>
> > think it would be easiest to have a var for each digit and check
> > the DC flag for rollovers. Or use the how many times can I suff x
> > into y method
>
> I was pondering this, but realized that it would definately add a lot
> of code unless there is a way to define that I am using a 4-bit word
> instead of an 8-bit word, as each LED digit only really handles 0-F.
>
> I'm not sure about the x into y method. I don't really know what it
> is. Could you explain it to me, please?
>
> Thanks,
> Sabachka
>
> --
> sabachka-piclist@oddmagic.net
>
> The koan is like the pebble in the mouth of a man who walks
> in the destert. It does not quench existing thirst, but it
> stimulates the means of quenching it.
>     -- Christmas Humphreys, Buddhism
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.
>

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.