Brian,
How about a lookup table - if you don't want to use 256 bytes you can
do it nibble by nibble & only use a 16 byte table for a small speed
reduction.

RP

On 09/06/06, Brian Millward <b.millward@ntlworld.com> wrote:
> I am fairly new to PIC programming and I am building a radio clock to decode
> Rugby MSF transmissions.
>
>
>
> It all works, but I have not done any parity checking.
>
>
>
> I have some BCD variables and a checksum bit and I need to check that all
> the bits add up to an odd number.
>
>
>
> I have thought of checking the lsb, then shifting right and repeating etc,
> adding all the bits together, but I am sure that there is an easier way I
> just cannot think of it
>
>
>
> Apologies for seeming to be a bit dense, but I am trying to master it.
>
>
>
> By the way, I am using CCS 'C' compiler.
>
>
>
> Thanks for any help you may be able to give.
>
>
>
> Regards ... Brian
>
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist