No I2S support in Raspberry Pi Pico builds?

[danr]

I'd like to use a MAX98357A board with my Pico output sounds. These boards have an I2S interface, and I've found some example code that I think I can adapt to run on the Pico. But, even though the author says, "I2S has been available in the nightly builds since July 5, 2021," I'm not finding the I2S class in the latest Pico build - rp2-pico-20210827-unstable-v1.16-242-g145fedef8.uf2. When I install that build, and try to import the I2S class, I get the following:

>>> from machine import I2S
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: can't import name I2S

Was it left out on purpose? Is there any way that I can still use that class even if it's not part of the build?

Thanks, Dan

[Roberthh]

The I2s class was added to the ESP32 port, not the rp2 port. The rp2040 chip has no I2S hardware, so it cannot support it directly. It is possible to use a software implementation using the PIO. Examples exist: https://arduino-pico.readthedocs.io/en/latest/i2s.html

[danr]

Thanks for that link!

[Mike Teachman]

I just started working on rPi Pico I2S support yesterday. The I2S support on the rPi Pico will be the same as the Pyboards and ESP32. Look for a new PR sometime in the next month.

In the meantime, you can get familiar with I2S on one of the supported platforms.

I have a repo of examples that might be helpful:
https://github.com/miketeachman/micropy ... s-examples