I know that there was some traffic concerning encoders earlier....but at
the time I wasn't interested in them.  Now I am, and I feel a bit guilty
because this may be old news to others.

The encoder I've got has an A pin and a B pin.  I've noticed on the
scope that one pulse train will lead the other depending on the
direction of rotation (CW vs. CCW).  During a power up state there could
be one of four conditions (two bits, A and B, thus four possible
states).  I'm beginning to write my block diagram for the code (intended
for a PIC16C84) and it's getting pretty messy with all the decision
loops.

* I first check which state the encoder is in.
* Then determine which direction it is rotating.
* Each degree of motion will be put into a register that is either
incremented or decremented depending on direction.

So if you are not sick of discussing encoder applications with the PIC I
would love to hear what other people have done....advice, best
practices, code snippets, etc.

Thanks,
Pete
peter.cesarz@appl.ge.com