Supported boards - AtmelUniversityFrance/atmel-samd21-xpro-boardmanagermodule Wiki

This module brings new boards to Arduino IDE:

Each variant (board definition, in term of Arduino world) provides the according pinmap as close as possible to usual Arduino definitions (Analog, Digital, Serial, Wire, SPI, etc...).

Atmel boards having a user button, named SW0, a specific definition for the pin driving this button has been added to the usual Arduino definitions: PIN_BUTTON, a.k.a. PIN_SW0.