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

This core is available as a package in the Arduino IDE cores manager.Just open the "Boards Manager" and install the package called:

"Arduino SAMD Boards (32-bit ARM Cortex-M0+)"

There is a dedicated section of the Arduino Forum for general discussion and project assistance:

http://forum.arduino.cc/index.php?board=98.0

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

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

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

Contributions are always welcome. The preferred way to receive code contribution is by submitting aPull Request on github.

1. Clone theArduinoCore-API repo to any convenient location:

   git clone https://github.com/arduino/ArduinoCore-API.git

2. Create an<SKETCHBOOK>/hardware/arduino-git folder, where<SKETCHBOOK> is the location of yourArduino sketchbook.
3. Change directories:

   cd <SKETCHBOOK>/hardware/arduino-git

4. Clone this repo:

   git clone https://github.com/arduino/ArduinoCore-samd.git samd

5. Change directories:

   cd samd/cores/arduino

6. Copy or symlink theapi folder from theArduinoCore-API repo:

   ln -s <ARDUINO_CORE_API>/api .

   where<ARDUINO_CORE_API> is the location where you've cloned the ArduinoCore-API repository to.
7. Restart the IDE.

This repository is under a Continuous Integration system that every hour checks if there are updates andbuilds a release for testing (the so called "Hourly builds").

The hourly builds are available through Boards Manager. If you want to install them:

1. Open thePreferences of the Arduino IDE.
2. Add this URLhttp://downloads.arduino.cc/Hourly/samd/package_samd-hourly-build_index.json in theAdditional Boards Manager URLs field, and click OK.
3. Open theBoards Manager (menu Tools->Board->Board Manager...)
4. InstallArduino SAMD core - Hourly build
5. Select one of the boards underSAMD Hourly build XX in Tools->Board menu
6. Compile/Upload as usual

If you already installed an hourly build and you want to update it with the latest:

1. Open theBoards Manager (menu Tools->Board->Board Manager...)
2. RemoveArduino SAMD core - Hourly build
3. Install againArduino SAMD core - Hourly build, the Board Manager will download the latest build replacing the old one.

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