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= Welcome to Cheddar Wiki =

Cheddar is a free real time scheduling tool. Cheddar is designed for checking task temporal constraints of a real time application/system. Systems to analyze can be described with [http://www.aadl.info/ AADL] or a with Cheddar specific language. It can help you for quick prototyping of real time schedulers. It can also be used for educational purpose. Cheddar is developed and maintained by the [http://www.ea2215.univ-brest.fr/ LISYC] Team, University of Brest.

Cheddar relies on Ocarina to provide schedulability analysis of AADL models. The ocarina team also use the Cheddar analyzer for their research projects and some tutorial/labs. There is a strong cooperation between the two teams.

Cheddar can be run as a [http://www.ellidiss.com/ STOOD] or as a [http://www.topcased.org/ TOPCASED] plug in. The interoperability of STOOD/TOPCASED/Cheddar is managed by Pierre Dissaux ([http://www.ellidiss.com/ Ellidiss software]) . There is also a strong cooperation between the Cheddar team and Ellidiss technologies to investigate how Cheddar can be efficiently analyze AADL models built with STOOD.

Our real time scheduling simulator is composed of two independent parts : a graphical editor used to describe a real time application/system, and a framework which includes most of classical real time scheduling/feasibility algorithms/tests.

Cheddar is written in [wiki:Ada]. The graphical editor is made with [wiki:GtkAda]. Cheddar runs on Solaris, Linux and win32 boxes and should run on every GNAT/GtkAda supported platforms ( see [http://www.act-europe.fr/ AdaCore web site] for details). 

= Cheddar Users  =

Useful information can be found at [http://beru.univ-brest.fr/~singhoff/cheddar/ Cheddar official web page] :

 * [http://beru.univ-brest.fr/~singhoff/cheddar/#Ref2 Download] and [http://beru.univ-brest.fr/~singhoff/cheddar/#Ref3 install] instructions.

 * A [http://beru.univ-brest.fr/~singhoff/cheddar/#Ref9 mailing list] which is used to share information between Cheddar users.


Furthermore, if you want to report bugs, ask for a new features, participate to Cheddar development, ... You can [wiki:subscribe] to the Cheddar wiki list. 


= Cheddar developers =

This wiki is also use to provide support for Cheddar developers.

== Cheddar Source Code ==

Cheddar source code can be found at the following [http://beru.univ-brest.fr/svn/CHEDDAR-2.0/ SVN repository address] (a write access will be granted if you have subscribed to the Cheddar wiki list).

One can use several tools to access Cheddar [http://subversion.tigris.org/ SVN] repository like [http://tortoisesvn.net/ TortoiseSVN] (a list of SVN client is available [http://subversion.tigris.org/links.html#clients here]).

== Cheddar Compilation/Installation ==

One can use any text editor and shell tool or the following IDE to build and install Cheddar : 

 * [https://libre.adacore.com/gps/ GPS] (GNAT Programming Studio) (recommended). 
   
 * [http://www.usafa.af.mil/df/dfcs/bios/mcc_html/adagide.cfm AdaGide].

Check the [wiki:building building instructions] page for further information.