Hi,
I’m working on a board similar to the Adafruit QT Py - SAMD21.
Where can I find more info on what the contents of the json file mean?
For example:
"core": "adafruit",
"extra_flags": "-DARDUINO_QTPY_M0 -DCRYSTALLESS -DADAFRUIT_QTPY_M0 -D__SAMD21E18A__ -DARM_MATH_CM0PLUS",
"variant": "qtpy_m0"
How do I change the assignments of the SERCOM pins?
See https://learn.adafruit.com/using-atsamd21-sercom-to-add-more-spi-i2c-serial-ports?view=all and redirect to a new variant; For the usage of the attributes within the JSON file, see the platform + builder code and docs.
https://github.com/platformio/platform-atmelsam/blob/develop/platform.py
https://docs.platformio.org/en/latest/platforms/creating_board.html
Note that the builder script gives you the possibility of redirecting the variant folder, so, you won’t need to touch any files within the package itself (C:\Users\<user>\.platformio\packages):