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required (and optional) source files for the Arduino development environment, specifically the hardware/arduino sub-directory, to support xmega processors
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bootloaders
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README.md
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patch-avrdude.6.1-avrdude.conf
patch.boards.txt

README.md

arduino

(The XMegaForArduino project would not be possible without the Arduino IDE)

This repository contains the files and other additions for the 'hardware/arduino' sub-directory in the arduino development environment that are necessary for supporting specific ATXmega CPU's.

This software is provided 'as-is' with no warranty, implied or otherwise

On versions of the IDE as of 1.6 you should be able to use the downloadable hardware manager configuration file at the following location:

     hardware manager URL for package_XMegaForArduino_index.json

In some cases, you might want to do this manually, by downloading the latest 'tarball' of the distribution files, and extracting them directly into the

    sketchbook/hardware

directory tree. In some cases, this may be the preferable method.

The distribution archives are located on the IDE repository, with names similar to the following:

    XMegaForArduino-0.9.1.snapshot.txz

where '0.9.1' would be the release snapshot version. Note that the 'tar.bz2' files are used by the JSON file, and don't have the correct directory tree.

For earlier IDE versions (prior to 1.6), you will need to patch boards.txt and avrdude.conf manually, and probably patch avr-gcc, avr-binutils, and avr-libc . The patch files are available in the 'patches' repository as a part of this project.

NOTE: in some cases there may be USB vendor IDs or product IDs that have been placed into the code FOR DEMONSTRATION PURPOSES ONLY. Under NO circumstances are you to ship ANY products with these IDs in place. They are only assigned for demonstration purposes, primarily so that the code will compile without errors or user-side edits.

If your 'FOSS' product needs a vendor ID and product ID, you might try

   openmoko.org - USB Product IDs
   arduino on github - 'usbdrv' free USB IDs

* DERIVED OPEN SOURCE SOFTWARE *

This software has been modified from Arduino 1.06 source that is covered by either [L]GPLv2 or [L]GPLv3. The licensing details are generally contained within the files themselves. However, if there are no licensing specifications, it should be treated as being the same as for the Arduino 1.06 environment (and later, as appropriate). It is also available free of charge.

For more information, see http://arduino.cc/ and relevant source files.

* ADDITIONAL LICENSING FOR XMEGA-SPECIFIC CODE - MIT-like license *

Portions of this code were written SPECIFICALLY for the XMEGA series processor and are not actually 'derived code', but are included in the source as part of a 'derived work'. As such, within the context of the Arduino build environment, and with respect to the implementation of the supporting functions, the entire work should be considered a 'derived work'.

HOWEVER, if you were to make copies of ONLY the XMEGA-specific code for your own purpose, you may license use of ONLY the XMEGA-specific code, which does not appear in the original Arduino files from which this work was derived, to use in your own work, provided that you include a copyright statement similar to the following:

  Portions of this work have been used by permission from the XMegaForArduino
  project and are Copyright (c) 2015 by S.F.T. Inc. - all rights reserved

So if you simply included portions of the 'clock setup' code for the XMEGA processor within your own work, you could license that under an MIT-like as stated above, in lieu of an [L]GPLv2 or [L]GPLv3 license (as appropriate). Keep in mind that inclusion of actual GPL-derived code would not be allowed, so at the most you could copy the XMEGA-specific code, but not the entire function, nor implement something that could be considered 'derived from' the GPL version of the code. This distinction has been provided specifically so that you can use this project as 'sample code' for your own work, for doing some of the more difficult tasks (like setting up the clock), without being locked into using GPL for your own code afterwards.

If you believe that your resulting work MIGHT STILL be a derived work, you should consider using the appropriate [L]GPL license.

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