digital PWM output support

[damercer]

Hi:
I have some professors at RPI who are looking to use the digital PWM outputs to drive external H-Bridge motor drivers. Ideally, I think, how they might use the 4 digital pins would be to control maybe two motors using 2 pins as PWM outputs for motor speed and the other two pins as simple digital outputs for direction control (or maybe just one motor using the other 3 pins as simple digital controls).

I realize there are conflicts when changing PWM signals while the main analog ADC/DAC streaming is running. But allowing the host program to change PWM settings between the gaps in the ADC/DAC stream during discontinuous mode would still be useful I think.

If you could maybe post a possible implementation here I could clone it and play around with it some on my own.

Thanks

Doug