@AnalysIR, SparkIntervalTimer is a library I created. I will be releasing the Photon compatible version in the next couple of days after having found a few issues.
- Fast GPIO is in the new firmware release and documented here. A pinSetFast or pinResetFast operation takes about 41ns each!
- ISR hooks for timers are available though not fully documented yet. I hope to start work on a new timer library soon though I have no ETA.
- Hardware PWM. I assume you mean vs the PWM done by analogueWrite(). The goal is to have that as part of the new timer library.
