Autogenerate board support

[beriberikix]

Note: this is currently out of scope for the GSoC season due to the time required to implement but I'm leaving this here for future contributions.

Arduino cores call each board a "variant" and place board-specific files in the variants folder. These files, plus specifying them in the boards.txt (see #10,) is what let's the Arduino tools know how to build, flash and generally interact with a board.

In the Zephyr world, a lot of that information is encapsulated in files like a board's device tree. It is theoretically possible to use this information to partially (or fully?) autogenerate Arduino variants and boards.txt. There are many libraries out there, but for example lopper is a common Python library to manipulate DTS files.

[DhruvaG2000]

This is a good idea @beriberikix , and since it involves devicetree I think a potential topic to bring up in coming Linux Plumbers Conf 2023. Do update if you have had any more insights on this topic from since when you've raised this issue.

[beriberikix]

Okay! I still think creating a custom output for lopper might be the most straightforward. I know the MicroPython folks are asking a similar question.

The idea was inspired by this talk: https://youtu.be/m8wh0pT_P-c?si=KPeCzlqY5_yIaPZ8