The FreeRTOS source code is licensed by a *modified* GNU General Public | |
License (GPL). The modification is provided in the form of an exception. | |
NOTE: The modification to the GPL is included to allow you to distribute a | |
combined work that includes FreeRTOS without being obliged to provide the source | |
code for proprietary components outside of the FreeRTOS kernel. | |
---------------------------------------------------------------------------- | |
The FreeRTOS GPL Exception Text: | |
Any FreeRTOS source code, whether modified or in it's original release form, | |
or whether in whole or in part, can only be distributed by you under the terms | |
of the GNU General Public License plus this exception. An independent module is | |
a module which is not derived from or based on FreeRTOS. | |
Clause 1: | |
Linking FreeRTOS statically or dynamically with other modules is making a | |
combined work based on FreeRTOS. Thus, the terms and conditions of the GNU | |
General Public License cover the whole combination. | |
As a special exception, the copyright holder of FreeRTOS gives you permission | |
to link FreeRTOS with independent modules that communicate with FreeRTOS | |
solely through the FreeRTOS API interface, regardless of the license terms of | |
these independent modules, and to copy and distribute the resulting combined | |
work under terms of your choice, provided that | |
+ Every copy of the combined work is accompanied by a written statement that | |
details to the recipient the version of FreeRTOS used and an offer by yourself | |
to provide the FreeRTOS source code (including any modifications you may have | |
made) should the recipient request it. | |
+ The combined work is not itself an RTOS, scheduler, kernel or related product. | |
+ The independent modules add significant and primary functionality to FreeRTOS | |
and do not merely extend the existing functionality already present in FreeRTOS. | |
Clause 2: | |
FreeRTOS may not be used for any competitive or comparative purpose, including the | |
publication of any form of run time or compile time metric, without the express | |
permission of Real Time Engineers Ltd. (this is the norm within the industry and | |
is intended to ensure information accuracy). | |
-------------------------------------------------------------------- | |
The standard GPL exception text: | |
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 your | |
freedom to share and change it. By contrast, the GNU General Public | |
License is intended to guarantee your freedom to share and change free | |
software--to make sure the software is free for all its users. This | |
General Public License applies to most of the Free Software | |
Foundation's software and to any other program whose authors commit to | |
using it. (Some other Free Software Foundation software is covered by | |
the GNU Library General Public License instead.) You can apply it to | |
your programs, too. | |
When we speak of free software, we are referring to freedom, not | |
price. Our General Public Licenses are designed to make sure that you | |
have the freedom to distribute copies of free software (and charge for | |
this service if you wish), that you receive source code or can get it | |
if you want it, that you can change the software or use pieces of it | |
in new free programs; and that you know you can do these things. | |
To protect your rights, we need to make restrictions that forbid | |
anyone to deny you these rights or to ask you to surrender the rights. | |
These restrictions translate to certain responsibilities for you if you | |
distribute copies of the software, or if you modify it. | |
For example, if you distribute copies of such a program, whether | |
gratis or for a fee, you must give the recipients all the rights that | |
you have. You must make sure that they, too, receive or can get the | |
source code. And you must show them these terms so they know their | |
rights. | |
We protect your rights with two steps: (1) copyright the software, and | |
(2) offer you this license which gives you legal permission to copy, | |
distribute and/or modify the software. | |
Also, for each author's protection and ours, we want to make certain | |
that everyone understands that there is no warranty for this free | |
software. If the software is modified by someone else and passed on, we | |
want its recipients to know that what they have is not the original, so | |
that any problems introduced by others will not reflect on the original | |
authors' reputations. | |
Finally, any free program is threatened constantly by software | |
patents. We wish to avoid the danger that redistributors of a free | |
program will individually obtain patent licenses, in effect making the | |
program proprietary. To prevent this, we have made it clear that any | |
patent must be licensed for everyone's free use or not licensed at all. | |
The precise terms and conditions for copying, distribution and | |
modification follow. | |
GNU GENERAL PUBLIC LICENSE | |
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | |
0. This License applies to any program or other work which contains | |
a notice placed by the copyright holder saying it may be distributed | |
under the terms of this General Public License. The "Program", below, | |
refers to any such program or work, and a "work based on the Program" | |
means either the Program or any derivative work under copyright law: | |
that is to say, a work containing the Program or a portion of it, | |
either verbatim or with modifications and/or translated into another | |
language. (Hereinafter, translation is included without limitation in | |
the term "modification".) Each licensee is addressed as "you". | |
Activities other than copying, distribution and modification are not | |
covered by this License; they are outside its scope. The act of | |
running the Program is not restricted, and the output from the Program | |
is covered only if its contents constitute a work based on the | |
Program (independent of having been made by running the Program). | |
Whether that is true depends on what the Program does. | |
1. You may copy and distribute verbatim copies of the Program's | |
source code as you receive it, in any medium, provided that you | |
conspicuously and appropriately publish on each copy an appropriate | |
copyright notice and disclaimer of warranty; keep intact all the | |
notices that refer to this License and to the absence of any warranty; | |
and give any other recipients of the Program a copy of this License | |
along with the Program. | |
You may charge a fee for the physical act of transferring a copy, and | |
you may at your option offer warranty protection in exchange for a fee. | |
2. You may modify your copy or copies of the Program or any portion | |
of it, thus forming a work based on the Program, and copy and | |
distribute such modifications or work under the terms of Section 1 | |
above, provided that you also meet all of these conditions: | |
a) You must cause the modified files to carry prominent notices | |
stating that you changed the files and the date of any change. | |
b) You must cause any work that you distribute or publish, that in | |
whole or in part contains or is derived from the Program or any | |
part thereof, to be licensed as a whole at no charge to all third | |
parties under the terms of this License. | |
c) If the modified program normally reads commands interactively | |
when run, you must cause it, when started running for such | |
interactive use in the most ordinary way, to print or display an | |
announcement including an appropriate copyright notice and a | |
notice that there is no warranty (or else, saying that you provide | |
a warranty) and that users may redistribute the program under | |
these conditions, and telling the user how to view a copy of this | |
License. (Exception: if the Program itself is interactive but | |
does not normally print such an announcement, your work based on | |
the Program is not required to print an announcement.) | |
These requirements apply to the modified work as a whole. If | |
identifiable sections of that work are not derived from the Program, | |
and can be reasonably considered independent and separate works in | |
themselves, then this License, and its terms, do not apply to those | |
sections when you distribute them as separate works. But when you | |
distribute the same sections as part of a whole which is a work based | |
on the Program, the distribution of the whole must be on the terms of | |
this License, whose permissions for other licensees extend to the | |
entire whole, and thus to each and every part regardless of who wrote it. | |
Thus, it is not the intent of this section to claim rights or contest | |
your rights to work written entirely by you; rather, the intent is to | |
exercise the right to control the distribution of derivative or | |
collective works based on the Program. | |
In addition, mere aggregation of another work not based on the Program | |
with the Program (or with a work based on the Program) on a volume of | |
a storage or distribution medium does not bring the other work under | |
the scope of this License. | |
3. You may copy and distribute the Program (or a work based on it, | |
under Section 2) in object code or executable form under the terms of | |
Sections 1 and 2 above provided that you also do one of the following: | |
a) Accompany it with the complete corresponding machine-readable | |
source code, which must be distributed under the terms of Sections | |
1 and 2 above on a medium customarily used for software interchange; or, | |
b) Accompany it with a written offer, valid for at least three | |
years, to give any third party, for a charge no more than your | |
cost of physically performing source distribution, a complete | |
machine-readable copy of the corresponding source code, to be | |
distributed under the terms of Sections 1 and 2 above on a medium | |
customarily used for software interchange; or, | |
c) Accompany it with the information you received as to the offer | |
to distribute corresponding source code. (This alternative is | |
allowed only for noncommercial distribution and only if you | |
received the program in object code or executable form with such | |
an offer, in accord with Subsection b above.) | |
The source code for a work means the preferred form of the work for | |
making modifications to it. For an executable work, complete source | |
code means all the source code for all modules it contains, plus any | |
associated interface definition files, plus the scripts used to | |
control compilation and installation of the executable. However, as a | |
special exception, the source code distributed need not include | |
anything that is normally distributed (in either source or binary | |
form) with the major components (compiler, kernel, and so on) of the | |
operating system on which the executable runs, unless that component | |
itself accompanies the executable. | |
If distribution of executable or object code is made by offering | |
access to copy from a designated place, then offering equivalent | |
access to copy the source code from the same place counts as | |
distribution of the source code, even though third parties are not | |
compelled to copy the source along with the object code. | |
4. You may not copy, modify, sublicense, or distribute the Program | |
except as expressly provided under this License. Any attempt | |
otherwise to copy, modify, sublicense or distribute the Program is | |
void, and will automatically terminate your rights under this License. | |
However, parties who have received copies, or rights, from you under | |
this License will not have their licenses terminated so long as such | |
parties remain in full compliance. | |
5. You are not required to accept this License, since you have not | |
signed it. However, nothing else grants you permission to modify or | |
distribute the Program or its derivative works. These actions are | |
prohibited by law if you do not accept this License. Therefore, by | |
modifying or distributing the Program (or any work based on the | |
Program), you indicate your acceptance of this License to do so, and | |
all its terms and conditions for copying, distributing or modifying | |
the Program or works based on it. | |
6. Each time you redistribute the Program (or any work based on the | |
Program), the recipient automatically receives a license from the | |
original licensor to copy, distribute or modify the Program subject to | |
these terms and conditions. You may not impose any further | |
restrictions on the recipients' exercise of the rights granted herein. | |
You are not responsible for enforcing compliance by third parties to | |
this License. | |
7. If, as a consequence of a court judgment or allegation of patent | |
infringement or for any other reason (not limited to patent issues), | |
conditions are imposed on you (whether by court order, agreement or | |
otherwise) that contradict the conditions of this License, they do not | |
excuse you from the conditions of this License. If you cannot | |
distribute so as to satisfy simultaneously your obligations under this | |
License and any other pertinent obligations, then as a consequence you | |
may not distribute the Program at all. For example, if a patent | |
license would not permit royalty-free redistribution of the Program by | |
all those who receive copies directly or indirectly through you, then | |
the only way you could satisfy both it and this License would be to | |
refrain entirely from distribution of the Program. | |
If any portion of this section is held invalid or unenforceable under | |
any particular circumstance, the balance of the section is intended to | |
apply and the section as a whole is intended to apply in other | |
circumstances. | |
It is not the purpose of this section to induce you to infringe any | |
patents or other property right claims or to contest validity of any | |
such claims; this section has the sole purpose of protecting the | |
integrity of the free software distribution system, which is | |
implemented by public license practices. Many people have made | |
generous contributions to the wide range of software distributed | |
through that system in reliance on consistent application of that | |
system; it is up to the author/donor to decide if he or she is willing | |
to distribute software through any other system and a licensee cannot | |
impose that choice. | |
This section is intended to make thoroughly clear what is believed to | |
be a consequence of the rest of this License. | |
8. If the distribution and/or use of the Program is restricted in | |
certain countries either by patents or by copyrighted interfaces, the | |
original copyright holder who places the Program under this License | |
may add an explicit geographical distribution limitation excluding | |
those countries, so that distribution is permitted only in or among | |
countries not thus excluded. In such case, this License incorporates | |
the limitation as if written in the body of this License. | |
9. The Free Software Foundation may publish revised and/or new versions | |
of the General Public License from time to time. Such new versions will | |
be similar in spirit to the present version, but may differ in detail to | |
address new problems or concerns. | |
Each version is given a distinguishing version number. If the Program | |
specifies a version number of this License which applies to it and "any | |
later version", you have the option of following the terms and conditions | |
either of that version or of any later version published by the Free | |
Software Foundation. If the Program does not specify a version number of | |
this License, you may choose any version ever published by the Free Software | |
Foundation. | |
10. If you wish to incorporate parts of the Program into other free | |
programs whose distribution conditions are different, write to the author | |
to ask for permission. For software which is copyrighted by the Free | |
Software Foundation, write to the Free Software Foundation; we sometimes | |
make exceptions for this. Our decision will be guided by the two goals | |
of preserving the free status of all derivatives of our free software and | |
of promoting the sharing and reuse of software generally. | |
NO WARRANTY | |
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY | |
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN | |
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES | |
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED | |
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS | |
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE | |
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, | |
REPAIR OR CORRECTION. | |
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING | |
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR | |
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, | |
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING | |
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED | |
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY | |
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER | |
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE | |
POSSIBILITY OF SUCH DAMAGES. | |
END OF TERMS AND CONDITIONS | |
How to Apply These Terms to Your New Programs | |
If you develop a new program, and you want it to be of the greatest | |
possible use to the public, the best way to achieve this is to make it | |
free software which everyone can redistribute and change under these terms. | |
To do so, attach the following notices to the program. It is safest | |
to attach them to the start of each source file to most effectively | |
convey the exclusion of warranty; and each file should have at least | |
the "copyright" line and a pointer to where the full notice is found. | |
<one line to give the program's name and a brief idea of what it does.> | |
Copyright (C) <year> <name of author> | |
This program is free software; you can redistribute it and/or modify | |
it under the terms of the GNU General Public License** as published by | |
the Free Software Foundation; either version 2 of the License, or | |
(at your option) any later version. | |
This program 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 General Public License for more details. | |
You should have received a copy of the GNU General Public License | |
along with this program; if not, write to the Free Software | |
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
Also add information on how to contact you by electronic and paper mail. | |
If the program is interactive, make it output a short notice like this | |
when it starts in an interactive mode: | |
Gnomovision version 69, Copyright (C) year name of author | |
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. | |
This is free software, and you are welcome to redistribute it | |
under certain conditions; type `show c' for details. | |
The hypothetical commands `show w' and `show c' should show the appropriate | |
parts of the General Public License. Of course, the commands you use may | |
be called something other than `show w' and `show c'; they could even be | |
mouse-clicks or menu items--whatever suits your program. | |
You should also get your employer (if you work as a programmer) or your | |
school, if any, to sign a "copyright disclaimer" for the program, if | |
necessary. Here is a sample; alter the names: | |
Yoyodyne, Inc., hereby disclaims all copyright interest in the program | |
`Gnomovision' (which makes passes at compilers) written by James Hacker. | |
<signature of Ty Coon>, 1 April 1989 | |
Ty Coon, President of Vice | |
This General Public License does not permit incorporating your program into | |
proprietary programs. If your program is a subroutine library, you may | |
consider it more useful to permit linking proprietary applications with the | |
library. If this is what you want to do, use the GNU Library General | |
Public License instead of this License. | |