PREFACEConceiving and understanding a new license is not an easy task. To make thingseasier for both, the author and the licensee, we have decided to base ourlicense for the USB driver on an existing license with well-understoodproperties.Our favorite choice for the base license was the GNU General Public License(GPL). However, we cannot use the GNU GPL directly for the following reasons:(1) It was not intended for projects involving hardware -- we must extend the    term "source code" to at least the circuit diagram.(2) The GNU GPL does not require publication. Only if a binary is published,    it requires that the source is published as well. This is reasonable for    software because unpublished software is of little relevance. For projects    involving hardware, we want to REQUIRE publication. More than that, we    even want to define HOW the publication must be done (files contained,    file formats etc).(3) As the author of the software, we can distribute it under more than one    license. For people who don't want to meet the obligations of the GNU GPL,    we want to offer commercial licenses. To avoid a split in revisions of    the driver, we need special privileges to distribute contributed    modifications under proprietary licenses.We can not simply modify the GNU GPL and incorporate our changes because theFree Software Foundation (FSF) who holds the copyright for the text of theGNU GPL does not allow modifications. We therefore set up our own smalllicense which incorporates the GNU GPL by reference:LICENSE FOR PROJECTS BUILT WITH "OBJECTIVE DEVELOPMENT'SFIRMWARE-ONLY USB-DRIVER FOR ATMEL'S AVR MICROCONTROLLERS"Version 2006-01I. Definitions"OBDEV" shall mean OBJECTIVE DEVELOPMENT Software GmbH or any legal successorthereof."Software Source Code" shall mean the preferred form of the software formaking modifications to it."USB Driver" shall mean the Software Source Code for OBDEV's firmware-onlyUSB-driver for Atmel's AVR microcontrollers."Function" shall mean the Software Source Code for all software executed onthe microcontroller except the USB Driver."Host Software" shall mean the Software Source Code for all software requiredto control the USB device from the USB host running any operating system."Project" shall mean the USB Driver, the Function, the Host Software, circuitdiagrams of the controller based hardware and accompanying documentation."source code" shall have the same meaning as the term "Project" above."Web Site" shall mean a collection of text and multimedia documents accessibleworldwide over internet through the HyperText Transfer Protocol (HTTP) onTCP port 80 (standard HTTP port).II. General License TermsThe general terms of this license consist of the GNU General Public LicenseVersion 2 (GNU GPL2) which is hereby incorporated into this section as thoughit were fully set forth here. A copy of the GNU GPL2 is included for yourconvenience in appendix A of this license.The term "source code" in the GNU GPL2 is to be understood as defined insection I above. If any term or definition in section I, III, IV or Vconflicts with the GNU GPL2, the term or definition in section I, III, IV orV has precedence of the GNU GPL2.III. Distribution of the ProjectThe distributed form of a Project must contain at least the following files:(a) Software Source Code files for the USB Driver, the Function and the Host    Software.(b) Circuit diagrams for the hardware in PDF, PNG or GIF image file format.(c) A file with name "Readme.txt" in ASCII format with at least the following    content (in English language):    - An explanation what the Project does.    - What to do with the distributed files (installation procedure etc.).    - A reference to Objective Development's USB driver.    - Your (author's) name and contact information. E-mail and/or URL is      sufficient.(d) Optionally a text file with a description of the circuit diagram, an    explanation of special (software) techniques used etc. (e) A copy of this license in a file with the name "License.txt". This copy    can be in the "usbdrv" subdirectory which contains the driver.IV. Requirement for PublicationAll modifications and derived work (Projects using the USB Driver) MUST bedistributed (published) as described in section III above on a Web Site. Themain page must reproduce at least a description of the Project (e.g. ascontained in the "Readme.txt" file distributed) and a download link for theentire Project. The URL of the main page must be submitted to OBDEV. OBDEVwill provide a mechanism for submitting Project URLs and for publishingProjects on their Web Site. The Project must remain available for at leasttwelve (12) months after the initial publication or at least six (6) monthsafter a subsequent version of that particular Project has been published.V. Author PrivilegesOBDEV reserves the right to distribute the USB Driver and all modifiedversions under other (proprietary) licenses. If you modify the USB Driverunder the grants of this license, you therefore grant OBDEV (in addition tothe grants of the GNU GPL2) a worldwide, perpetual, irrevocable royalty freelicense for your modifications. OBDEV shall not automatically gain rightsother than those of the GNU GPL2 in the other parts of the Project. Thissection V overrides possibly contradicting terms in the GNU GPL2 referencedin section II.APPENDIX A                    GNU GENERAL PUBLIC LICENSE                       Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc.                       59 Temple Place, Suite 330, Boston, MA  02111-1307  USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.                            Preamble  The licenses for most software are designed to take away yourfreedom to share and change it.  By contrast, the GNU General PublicLicense is intended to guarantee your freedom to share and change freesoftware--to make sure the software is free for all its users.  ThisGeneral Public License applies to most of the Free SoftwareFoundation's software and to any other program whose authors commit tousing it.  (Some other Free Software Foundation software is covered bythe GNU Library General Public License instead.)  You can apply it toyour programs, too.  When we speak of free software, we are referring to freedom, notprice.  Our General Public Licenses are designed to make sure that youhave the freedom to distribute copies of free software (and charge forthis service if you wish), that you receive source code or can get itif you want it, that you can change the software or use pieces of itin new free programs; and that you know you can do these things.  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If the software is modified by someone else and passed on, wewant its recipients to know that what they have is not the original, sothat any problems introduced by others will not reflect on the originalauthors' reputations.  Finally, any free program is threatened constantly by softwarepatents.  We wish to avoid the danger that redistributors of a freeprogram will individually obtain patent licenses, in effect making theprogram proprietary.  To prevent this, we have made it clear that anypatent must be licensed for everyone's free use or not licensed at all.  The precise terms and conditions for copying, distribution andmodification follow.                    GNU GENERAL PUBLIC LICENSE   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION  0. This License applies to any program or other work which containsa notice placed by the copyright holder saying it may be distributedunder the terms of this General Public License.  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