Add Adafruit esp32s2 boards with custom bootloader, partition and upload.extra_flags

[hathach]

done on behalf of @ladyada, this PR does:

• Add Adafruit FunHouse and upcoming Adafruit Feather Esp32s2
• Update Adafruit magtag and metro esp32s2 to have tinyuf2 as factory app
• Also modify platform.txt as discussed in allow board variant to has its own custom partition.csv and bootloader.bin adafruit/arduino-esp32#2 + Add build.esptool_extra to allow optionally flash factory app adafruit/arduino-esp32#3 + use upload.extra_flags instead of build.esptool_extra adafruit/arduino-esp32#4 to add support for
  • Board/variant partition.csv, bootloader.bin ( priority is user sketch > variant > build.parition/boot )
  • upload.extra_flags to optionally flash tinyuf2 as factory application
  • Remove duplicated parameter in running python script in linux and windows

Please review and let me know if you want any changes.

Notes: tinyuf2 is a uf2 bootloader for multiple platforms. For esp32s2, it is an factory app to perform uf2 firmware update.

[hathach]

merge latest commit from master to resolve platform.txt conflict, set base branch to other and back to get github update file changes.

[me-no-dev]

Thanks @hathach :) merged

[UnexpectedMaker]

This is cool! @hathach does this mean I can duplicate this with the TinyS2 and FeatherS2 variant + UF2 firmware and it will also work for buy boards?

[hathach]

Thanks @hathach :) merged

Superb! Thank you for a quick review and merge.

This is cool! @hathach does this mean I can duplicate this with the TinyS2 and FeatherS2 variant + UF2 firmware and it will also work for buy boards?

yeah, you will need partition.csv bootloader.bin and tinyuf2.bin . You could find that in the tinyuf2 release or build it yourself. Just follow my changes for adafruit boards.

[me-no-dev]

@UnexpectedMaker I will suggest you hurry up :) I need to release 2.0.0-rc1 to the board manager and will be nice if it's in there

[UnexpectedMaker]

@UnexpectedMaker I will suggest you hurry up :) I need to release 2.0.0-rc1 to the board manager and will be nice if it's in there

Ok, please don't wait for me then. I need a few days to get something implemented and tested and to truly understand the implications of doing this... like that I assume I'd lose the ability to allow people to pick custom partitions from the tools menu in the IDE etc. Some folks actually use that ;)

Maybe I'll have something in for a future RC release.

It's very exciting though!