I have a question for all the PIC experts out there:  I am trying to
interface a quadrature decoder to a PIC which currently drives some
stepping motors.  I can easily figure out how to build an external up/down
counter and "roll my own" absolute position decoder-  but has anybody
successfully used the PIC itself to  do this?

I was thinking along the lines of using one externally clocked counter to
count all pulses, and another to count only those in one direction.
Subtracting these two give a relative number of steps in a particular
direction.

Any comments?

David

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David Darknell
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              |--|__|--|___|--|__|--|   david@xia.com david@papdev.com

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