Use pyupdi for UPDI uploads

[platformio]

Use pyupdi for UPDI uploads

[valeros]

It seems that their device names differ a bit from ours, so you probably won't be able to use the $BOARD_MCU variable. Anyway, just install the pyudpi package via pip pip install https://github.com/mraardvark/pyupdi/archive/master.zip and it should work with your slightly modified configuration:

...
upload_speed = 115200
upload_flags =
    -d
    mega3209
    -c
    $UPLOAD_PORT
    -b
    $UPLOAD_SPEED
upload_command = pyupdi $UPLOAD_FLAGS -f $SOURCE

[MCUdude]

Cool, I'll give it a try a little later. So it wouldn't make sense to include it in the atmelmegaavr toolchain? It's easy to install pyupdi on a Mac/Linux computer, but on Windows, you'll probably have to install the whole python/pip package first, so the bar is a little higher.

Could pyupdi be installed automatically by PlatformIO if called?

[valeros]

If someone uses PlatformIO they already have Python and pip installed, so you can type directly in the IDE terminal python -m pip install https://github.com/mraardvark/pyupdi/archive/master.zip

[MCUdude]

It would be great if you could document this in your docs as an option for a custom upload command. I will also document it in the MegaCoreX repo

[valeros]

Thanks, added!