Questions about stepper example program

stgislander

The subtitle would be, "Why things are done the way they are."

I'm reviewing render.cpp for the stepper motor example program. From what I'm seeing, it's all digital IO. No audio or analog IO.

If that is true, then why in setup() should I care if the audio and digital sample rates are the same?

The same goes with the for loop in render(). Why is it written for(unsigned int n = 0; n < context->audioFrames; n++), and not for(unsigned int n = 0; n < context->digitalFrames; n++)?

Or does it even matter?

giuliomoro

stgislander If that is true, then why in setup() should I care if the audio and digital sample rates are the same?

There is no good reason for that. That example hasn't been updated significantly since 2016 so it needs a bit of extra love. You can safely remove the check in setup() and use context->digitalFrames instead of context->audioFrames in render()

stgislander

giuliomoro Thanks Giulio. I was looking for examples where both analog and digital IO operations were being performed to see how to do my program, and stumbled across the stepper example. The check in setup() and use of context->audioFrames threw me off.