[ozrien]

The Talon SRX counts the rising edges on the index pin and sends it over CAN using the Quad Status Frame (See section 20.3. Quadrature Encoder Status in software ref manual).

So if you wanted to react to the index pin, you'll have to track it yourself. I figured when you see a change in the index rise count you could re-zero your quad position.

So how exactly did you want to use the index pin? Is quad A/B decoding not sufficient?