RP2040 PIO?

[objectiveSee]

This is library support programmable IO on the RP 2040? I am looking for a library that specifically supports this so that I don't have to have a lot of CPU dedicated to driving LEDs.

It's unclear whether the micro python core library for neopixel, supports PIO

https://github.com/micropython/micropython-lib/blob/master/micropython/drivers/led/neopixel/neopixel.py

Thanks!

[blaz-r]

This library uses PIO as the main way to send data out to leds, but some code is still executed on the cpu (like pixel assignment and operations on pixels).

[objectiveSee]

Thanks! Can you point to where the PIO stuff is in the code? I'm just curious to learn more about it.

[blaz-r]

These lines include the PIO program used to generate bitstream for LEDs. Here the state machine is initialized. Finally, this is the code used to send data from python to PIO. In PR #20 there was also some work done to rewrite the PIO program so we don't need sleep function inside the python, but it's not completely verified.

[objectiveSee]

Thank you for that clarification! Really helpful to see where in the code this happens.