"Peter L. Peres" wrote:
>
>       ... The bit-banged operations I
>implement always use bsf and bcf to access the port. The code size is rather
>good like this (for me)...

        I'd be careful with this approach. BSF and BCF are read before
write operations, so use the actual voltages on the pins to determine what
to write back to the GPIO port. If there's a 'difficult' load on the pin
(user puts very small R, large cap, etc. there) then the pin will be
written as this incorrect value, not what you originally wrote to it.


        Jim

  Elm Electronics
  ICs for Experimenters
http://www.elmelectronics.com/