Ad the ability to read the PIO PC location?

[dclaar]

The code doesn't currently support reading the PIO PC. Would this be a reasonable thing to add?

Use case:

I found this interesting PIO button debouncer. You determine the button state by reading the PIO PC with pio_sm_get_pc. I think most of the rest of it is already possible with the existing PIO support: Would it be reasonable to add this functionality?

[peterhinch]

I'm agnostic on reading the PIO PC.

In the specific use case of a debouncer I don't think it's a very good API, requiring the user code to regularly poll N state machines. You really want each debounced switch to trigger a callback or set an asyncio.Event on a state change, so that asynchronous switch operations can trigger a response.

At the moment I can't think of a neat way of doing this with multiple SM's.