Richard O'Keefe wrote:
How hard would it be to use Copilot with ESP32 boards, using their C SDK libraries for I/O?
The RPi Pico is also a candidate for the project we've just submitted a grant proposal for. The Pico has "PIO" and the ESP32 chips have "ULP" and they are both basically very low power finite state machines that can handle basic I/O while the main CPU(s) is(are) dead to the world.
zephyr-copilot can be used to program both ESP32 and RPI Pico, since the Zephyr project supports both. I've only spent a few weeks developing zephyr-copilot so far, and so it only supports a very small subset of what Zepyhr can do with these boards. Zephyr does not appear to support PIO/ULP yet though. The disadvantage of using a general-purpose RTOS rather than board-specific SDKs. Seems that it's possible to use Arduino to program ULP, via https://github.com/duff2013/ulptool so I do think it would be possible to use arduino-copilot or something like it to program these coprocessors. -- see shy jo