None of the sources on the piclist page worked for me so I just ended up
writing my own decimal -> BCD function off an algorithm I found on some
EE class on a university home page, works great! :)  I'd post it if it
wasn't so tailored to my own project :(

nick@veys.com | www.veys.com/nick


> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Mike Mansheim
> Sent: Thursday, July 26, 2001 6:21 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]: "itoa" routines? (16F870)
>
>
> > ...I have an 8bit number, only ranging 99 >= N >= 0 so it
> will only be
> > 2 digits.  I need to find a way to output it to my LCD...
>
> Not sure this will help, but just in case...
> pseudo-code for what you want to do:
>
>     lcd_digit1 = a2d_result / 10
>     lcd_digit2 = a2d_result - (lcd_digit1 * 10)
>
> in you're working in C, this is trivial.
> in asm, multiply by 10 is simple (x*8) + (x*2), but divide by
> 10 is not so simple. There is a lot of stuff in the source
> code section of piclist.com for basic multiplying and
> dividing, and (under conversions) all kinds of clever stuff
> for converting binary to decimal, which is really what you
> want to do.  If you're not familiar with this type of stuff,
> 'BCD' means binary coded decimal, and just means each byte of
> the result contains a digit of the input number. For example,
> if the input is one byte, say B9h (185 decimal), the output
> bytes will be 01, 08, 05.  'BCD packed' just means each digit
> is stored in a nibble, so there are two digits per byte
> (because the range for the digits is 0-9, and a nibble - 4
> bits - can hold 0-15).  You can grab the digit in the upper
> nibble via 'swapf' or dividing by 16.
>
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