joey castilloMar 5

EDIT: Solved! Thanks to @projectgus and @mnl for pointing me in the right direction. https://mastodon.social/@joeycastillo/116178688050493057

PREVIOUSLY: desperate plea for help from any #circuitpython oriented folks: I've purchased a bunch of ESP32-S2 Reverse TFT Feather boards (S2, not S3) for my students' assignment 3, but any attempt to initialize audioio.AudioOut, even for the most basic example, is met with an error:

RuntimeError: Failed to create continuous channels: not found

Show threadGusMar 5

@joeycastillo I don't know CircuitPython very well, but ESP32-S2 only has two DAC pins, IO17 and IO18 - does pin "board.A0" map to one of those?

https://docs.espressif.com/projects/esp-idf/en/stable/esp32s2/api-reference/peripherals/dac.html

Digital To Analog Converter (DAC) - ESP32-S2 - — ESP-IDF Programming Guide v5.5.3 documentation

Show threadGusMar 5
@joeycastillo ah nvm, I checked https://learn.adafruit.com/esp32-s2-reverse-tft-feather/pinouts and it does indeed! Sorry for the noise.
Adafruit ESP32-S2 Reverse TFT Feather

The Reverse TFT Feather comes with the 240x135 color TFT display on the back-side not the front-side. That makes it great for panel-mounted projects, especially with the included buttons. It's like an all-in-one display interface development board, powered by the fantastic ESP32-S2 WiFi module.

Adafruit Learning System
Show threadjoey castilloMar 5
@projectgus no worries, good to check these things! A look at the board definition confirms it, A0 is GPIO18, and looking further at the internals, this message seems to come from dac_continuous_new_channels returning ESP_ERR_NOT_FOUND, so I'm chasing into Espressif internals next. https://github.com/adafruit/circuitpython/blob/77c17696e5be01d40b78d5cbe157539d733af73a/ports/espressif/common-hal/audioio/AudioOut.c#L480
Show threadmnl mnl mnl mnl mnl

@joeycastillo @projectgus that means I think that all DMA channels were allocated, indeed the esp-idf version used by circuitpython now supports continuous mode. Maybe the board setup already allocates them already (for the display?)

Anyway, before I go too deep from my armchair peanut gallery, let me know if you want to hash this out maybe with gus too (the more the merrier)

Mar 5 at 9:19pmWeb
Show threadGusMar 5
@mnl @joeycastillo I do love a rabbit hole (a little too much), but I have to go do other things. Sorry, best of luck!