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opengeode 1.3.7

A tiny, free SDL editor for TASTE


OpenGEODE is a tiny open-source SDL editor that is developed for
the purpose of providing an easy to use and free state machine editor and
Ada code generator to the TASTE toolchain from the European Space Agency,
running in combination with ESA's ASN.1 "Space Certifiable" ASN.1 compiler.

SDL is the Specification and Description Language (Z100 standard from ITU-T).

This is NOT related to the graphical Simple DirectMedia Layer libraries!

Visit for more information about SDL.
Visit to get a full-featured commercial SDL tool and support

![alt tag](icons/opengeode-screenshot.png)


- Graphical editor of SDL processes and procedures.
- SDL2010 features: state composition and state aggregation
- Works on pure PR+CIF files (textual SDL notation)
- Supports ASN.1 data types - using ESA Space Certified compiler (
- Generates Ada code
- Automatic conversion to Statechart diagrams
- Save the complete or parts of the model to PNG/SVG/PDF files
- Hyperlinks (link a symbol content to any external document or web page)
- Context-dependent text auto-completion
- Syntax highlighting
- Undo/Redo, Copy-Paste
- (Limited) VIM mode - You can use :wq or :%s,search,replace,g, and /search pattern
- SDL to LLVM code generation
- Python API to parse and render SDL from other Python modules


On Windows, download the binary from [here](

Uzip it and run opengeode.exe. It contains everything without any other external dependencies.

Linux Pre-requisites

There are several dependencies for OpenGEODE:

- Python 2.7 with pip
- Pyside (the Qt bindings for Python)
- Python ANTLR Runtime
- PyGraphviz
- enum34, singledispatch
- [ASN1SCC](
- (optional) GNAT to build the generated Ada code
- mono
- optional: llvmpy (tested with 0.12.7)
- optional: LLVM (tested with 3.3)

On Debian, Ubuntu, and probably other distributions:

$ sudo apt-get install python-pyside pyside-tools graphviz python-pip gnat libmono-system-runtime4.0-cil \
libmono-corlib4.0-cil libmono-system-runtime-serialization-formatters-soap4.0-cil libmono-system-web4.0-cil \
libmono-system-xml4.0-cil libmono-system4.0-cil mono-runtime libmono-system-numerics4.0-cil \
libmono-system-data-linq4.0-cil libmono-corlib2.0-cil libmono-system2.0-cil
$ sudo pip install --upgrade graphviz enum34 singledispatch
$ sudo pip install antlr_python_runtime --allow-external antlr_python_runtime --allow-unverified antlr_python_runtime

To install the ASN.1 compiler:

$ cd /opt
$ sudo wget
$ sudo tar zxvf ASN1SCC-latest.tgz
$ echo 'export PATH=$PATH:/opt/<path to="" latest="" asn1scc="">/bin' >> ~/.bashrc

Check that it works:

$ asn1.exe

Optionally, to install llvmpy and LLVM follow the instructions [here](

OpenGEODE installation

To install the application on your machine, once all dependencies are met:

$ pip install --upgrade opengeode

This is sufficient to get opengeode running

Installation from source

You can get the source from the TASTE repositories or from GitHub

$ git clone

Then enter the opengeode directory and as root, type:

$ make install

Installation is optional. You can simply run to get it work.

Information and contact

OpenGEODE is part of the TASTE project.

Find more information and download at

TASTE allows to create embedded software systems that combine SDL models with C, Ada,
Matlab-Simulink and a few other languages or tools.

OpenGEODE is mainly designed, developed and maintained by Maxime Perrotin
maxime (dot) perrotin (at) esa (dot) int

The LLVM backend was designed and implemented by Diego Barbera during the ESA Summer of Code 2014

Some parts have been implemented by Laurent Meyer (native SDL type support in the parser)

The background pattern was downloaded from

The ASN.1 compiler (ASN1Scc) that OpenGEODE is based on was
developed by George Mamais and Thanassis Tsiodras for the European
Space Agency. Information at


License is LGPL (see file LICENSE)
The fonts are the fonts from Ubuntu, check licence in file FONT-LICENSE.TXT


1.3.7 (12/2015)
- Added icon to use Continuous Signals from the GUI

1.3.6 (11/2015)
- Support external procedures having a return statement
this allows to import math functions from the libmath without having
to provide manual code. see test-math

1.3.5 (11/2015)
- Better support for continous signals

1.3.4 (11/2015)
- Early support for continous signals
- Regression issue fixed (test-nocif2)

1.3.3 (11/2015)
- Better support of platform-dependent screen resolution and dpi
- Minor fixes in statechart scenes (no negative coordinates)

1.3.1 (11/2015)
- Support for State Aggregations (parallel states)
- Improved statechart rendering

1.2.10 (10/2015)
- Better support of renamePolicy
- Better handling of models without CIF coordinates
- Minor bug fixes
- Forloop syntax error handled correctly when using range
- support Hex and bit string literals when working with OCTET STRING
- support OUT keyword for procedure FPAR

1.2.4 (07/2015)
- Use version 3.2.x of the ASN1SCC compiler with new -renamePolicy flag
- Improve robustness

1.1.1 (07/2015)
- Strongly report syntax errors with symbol location and warning if user
tries to save a model with syntax errors

1.1.0 (07/2015)
- Write/Writeln procedure support enumerated types

1.0.1 (06/2015)
- Bugfix: use mono when calling asn1.exe by default (needed redhat-based

1.0.0 (06/2015)
- Bugfixes and minor improvements
- Python API / Simulator function (coupled with other TASTE components)

1.0RC (10/2014)
- Release candidate Version 1
- Allow standalone systems (made of one process)
- Major refactoring of parser and Ada backend
- Many bugfixes and improvements
- First version of LLVM backend

0.994 (07/2014)
- Maintenance release, minor fixes

0.993 (07/2014)
- Parser bugfixes
- Better support for nested states
- Ada generator improvements
- Support for unicode
- Indentation of PR code
- Copy-paste of procedures and nested states
- Improved regression testing

0.99 (04/2014)
- Refactoring of the backend engine, now using singledispatch
- Support of hierachical states
- Minor bugfixes

- Added support for FOR loops
In a task, use "for x in range([start], stop, [range]): ... endfor"
or "for x in sequenceOfvariable: ... endfor"
- Default symbol size is smaller
- Various minor bugfixes

- added support for default value when declaring a variable
e.g. DCL myVar myType ::= { x 5, y 2 };
default value must be a ground expression  
File Type Py Version Uploaded on Size
opengeode-1.3.7.tar.gz (md5) Source 2015-12-06 1MB
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