This repository contains the source code and configuration files of the Arduino Core for Atmel's SAMD21 and SAMD51 processor (used on the Arduino/Genuino Zero, MKR1000 and MKRZero boards).

In particular, this adds support for the Adafruit SAMD Boards such as the Feather M0

Note that this fork of adafruit/ArduinoCore-samd has had all USB files and references removed for use with a custom board that does not have a USB port. This follows instructions at

• https://github.com/maxgerhardt/ArduinoCore-samd and
• https://community.platformio.org/t/custom-samd21e16l-board-disable-usb-for-compiler/23068/2

• AREF must be tied to 3.3V for dac to work. This is a bug in the SAMD51 silicon.

If you find a bug you can submit an issue here on github:

https://github.com/robroypt/ArduinoCore-samd-adafruit

or if it is an issue with the upstream:

https://github.com/adafruit/ArduinoCore-samd/issues https://github.com/arduino/ArduinoCore-samd/issues

Before posting a new issue, please check if the same problem has been already reported by someone else to avoid duplicates.

This core has been developed by Arduino LLC in collaboration with Atmel.

  Copyright (c) 2015 Arduino LLC.  All right reserved.

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA