> On May 28, 2018, at 2:43 PM, Jason Thorpe <thor...@me.com> wrote: > > The PCA9685 also doesn’t have a variable clock UNLESS it’s driven by an > external clock source, in which case a pre-scaler value can be applied > (though, I’m not 100% certain on this — need to re-read the data sheet). So > having to configure the period as the current API requires is kind of > inconvenient.
Ah, I did, in fact, mis-read the data sheet. The PWM period is set by the following formula: pre_scale = round((clock / (4096 * period)) - 1; …regardless of internal or external clock. So, my objection to having to set the period is hereby withdrawn :-) -- thorpej
