Porting guide

[beriberikix]

Is there an existing or planned guide on how to port to platforms? I'm specifically interested in new RTOSes (see discussion on zephyrproject-rtos/zephyr#22247) but I imagine the same guide would be helpful for anyone trying to bring up a new baremetal platform using the Arduino core API.

[alranel]

Hi @beriberikix - sorry for the late answer. There's no guide at the moment, but it would be very nice to have one. I think a good starting point it the github.com/arduino/ArduinoCore-mbed repository which shows how a platform implementing this API can be developed.
Maybe could you help drafting such guide? :)

[beriberikix]

No worries @alranel! I've also found the arduin-cli to have little nuggets of good information, especially the Platform specification section.

Your reply is actually well timed - my team and are currently exploring this space! Would you be open to chatting further?

[beriberikix]

Hello! As a small update I submitted a related project for the Google Summer of Code (GSoC) under the linux foundation: https://wiki.linuxfoundation.org/gsoc/2022-gsoc-zephyr#arduino_module_based_on_zephyr

[beriberikix]

Hello! The GSoC season has ended and we've achieved a lot. The Zephyr Core can be found at zephyrproject-rtos/gsoc-2022-arduino-core. Key Arduino APIs are implemented as well as the ability to call into the Zephyr APIs for advanced usage. Additionally:

• 4 Arduino Variants are implemented, and one non-Arduino board added as a reference
• Toolchain (build, flash & debug) supported via the Zephyr SDK
• Arduino channel created on the official Zephyr Discord server (invite if you need it)
• First outside contributor!

@alranel integrating into the Arduino IDE 2.0 & CLI will be a critical milestone for the project. Do you know anyone from the community or organization with experience and willingness to help with the implementation?

[beriberikix]

@alranel bringing this up again as we'd really love help with the IDE/CLI integration. A porting guide is a lot of work so perhaps someone can develop a "minimal" Core implementation that we can study?

[aentinger]

Hello! The GSoC season has ended and we've achieved a lot. The Zephyr Core can be found at zephyrproject-rtos/gsoc-2022-arduino-core. Key Arduino APIs are implemented as well as the ability to call into the Zephyr APIs for advanced usage.

Well, this is pretty cool 😎 👍

@alranel bringing this up again as we'd really love help with the IDE/CLI integration. A porting guide is a lot of work so perhaps someone can develop a "minimal" Core implementation that we can study?

I'd suggest analyzing a simple 3rd party core, i.e. arduino-pico which is a 3rd party core targeting only a single architecture (and MCU for that matter), the RP2040.