Add support for P1AM-100

[NeoGaius]

Hi,

This adds the support for the P1AM-100 board which is based on the SAMD21. Very similar to the mkrzero.

Information about the hardware can be found here: https://github.com/facts-engineering/P1AM

Is there anything else required to implement this?

Resolves issues #98, #111, and #173

Best regards,
NeoGaius

[Ragiton]

At this point the core should probably be added too since @AdamCummick added Serial2 support to the P1AMCore recently.

Here is a link to the core: https://github.com/facts-engineering/P1AMCore

Is this something you are still able to work on @NeoGaius?

I'm just getting started with using the P1AM with PlatformIO and it would be very nice to have the board supported off the shelf.

Thanks,
Ragiton

[patrickwasp]

@Ragiton what's issues are you having with https://registry.platformio.org/libraries/facts-engineering/P1AM?

[Ragiton]

@Ragiton what's issues are you having with https://registry.platformio.org/libraries/facts-engineering/P1AM?

@patrickwasp I'm not having issues with the library you mention.

https://registry.platformio.org/libraries/facts-engineering/P1AM_Serial doesn't compile because it can't find Serial2. Serial2 doesn't exist on the mkrzero but it was added to the core here: https://github.com/facts-engineering/P1AMCore

from what I understand, the custom P1AMCore would need to be added for this board to work with the P1AM_Serial library

[patrickwasp]

is that what's holding back from this pull request being merged? @ivankravets @valeros, can you please provide feedback?