Hi all,
I am a first time poster to this list. I am currently working on my first
PIC project, an intelligent  motor controller. It will control two modified
hobby servos (to power my robot) and read two shaft encoders. I am hoping to
build PID control based on the feedback from the shaft encoders.

I am using a PIC16F84 and programming it in Hi-tec C.

The PIC will be slaved to a BASIC Stamp II, which will tell the PIC what to
do, i.e. drive forward, turn left/right...etc I think one byte should be
more than enough, splitting bits out to represent direction ( 01 might mean
turn left ) and speed....

My question is about the messaging from the BSII to the PIC. If I send a
message from the Stamp how do I read it in on the PIC? I am thinking about
using two lines one connected to an interrupt pin on the PIC that will say
"get ready for a message", then the second line that will receive the
message.

The bit I am stuck on it how to write the code (in C) to read in a byte on
any of the PIC pins.

Thanks for any suggestions and advice,
best regards,
James Fitzsimons

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