SAMD21 and SAMD51
This port supports many development boards that utilize SAMD21 and SAMD51 chips. See https://circuitpython.org/downloads for all supported boards.
Building
For build instructions see this guide: https://learn.adafruit.com/building-circuitpython/
Debugging
For debugging instructions see this guide: https://learn.adafruit.com/debugging-the-samd21-with-gdb