I know there's support for the Arduino IDE, but from my experience, many more people use VSCode and PlatformIO for embedded development these days. Especially on the more serious end.

I have used PlatformIO with the P1AM in the past and targeted the MKRZERO board. That works OK until you need the P1AM-SERIAL add-on, and then you're stuck, as the MKR board does not have any concept of another hardware serial port, let alone two of them.

I have tried to have a go at it myself, but it quickly turned out to be too hard as I do not have any of the technical details regarding the ATMEL toolchain. Guessing and trying to copy from the ATMELSAM toolchain only gets you some way and you get stuck in the weeds of dependencies that might or might not be required.

You can view some of the work here: https://github.com/leogaggl/P1AMCore - I left it up in case it serves as a starting point.

I would think it is definitely worth supporting for serious dev. And not too far from the Arduino space.

Cheers, Leo