PWM

[Jay]

I have a single one of the PWM modules working working with DMA as a 3 output arbitrary waveform generator. This works but I would like to make a 6 output arbitrary waveform generator. 

Is there a way to synchronize two of the PWM modules together?

Thanks

[Sigurd]

Hi,

Yes, that should be possible. I assume you want to start the 2 PWM instances precisely at the same time ? You could use EGU and PPI for that. Configure a PPI channel with task end-point(TEP) e.g. TASKS_SEQSTART[0] for PWM instance 0, and on the same PPI channel add a fork(FORK[channel].TEP) for TASKS_SEQSTART[0] for PWM instance 1. Then use a EGU event as the PPI event end-point(EEP) that triggers the start of the PWM, and to trigger the EGU event, write 1 to the corresponding EGU TASK.

[Jay]

Thanks I will try this

[Sigurd]

Great. You can find the PPI driver API here, if you don't use the driver, you can find a bare-metal example for ppi in this repo.