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OMMatlab

Matlab scripting OpenModelica interface using ZEROMQ

Requirement:

Openmodelica
Matlab
zeromq/jeromq

The jeromq/zeromq library can be build by following the instructions in the repository, or the users can use the pre-build "jeromq-0.4.4-SNAPSHOT.jar" available in this repository and start using it straight away.

Installation

Clone the repository and add the installation directory to Matlab PATH for future sessions. For Example 

from the matlab terminal, in windows
>>> pathtool
will open a window, add the directory to the list of entries and save. For example in windows
"C:/OPENMODELICAGIT/OpenModelica/OMMatlab"

Then we have to set the java classpath, so that the jeromq library can be used from Matlab. for that we need to create a file called javaclasspath.txt and add the jar file location to the file, To do that 
>>> prefdir
will show the preferred directory path, For example in windows 
'C:\Users\arupa54\AppData\Roaming\MathWorks\MATLAB\R2017b'
create a file javaclasspath.txt in that location and add the jar file path to the file, for example in windows the entry would be
C:/OPENMODELICAGIT/OpenModelica/OMMatlab/jeromq-0.4.4-SNAPSHOT.jar
Note: The path should be added without any quotes either single or double

You can also directly use the OMMatlab package directly from the directory where you have cloned, without need to perform the above steps. But the package cannot be used globally.

Usage

>>> import OMMatlab.*;
>>> omc=OMMatlab();
>>> omc.sendExpression("getVersion()")
"v1.13.0-dev-531-gde26b558a (64-bit)"
>>> omc.sendExpression("model a end a;")
"{a}"
>>> omc.sendExpression('loadFile("C:\OMMatlab\BouncingBall.mo")')
true
>>> omc.sendExpression("getClassNames()")
{a,BouncingBall}
>>> omc.sendExpression("simulate(BouncingBall)")
record SimulationResult
    resultFile = "C:/Users/arupa54/BouncingBall_res.mat",
    simulationOptions = "startTime = 0.0, stopTime = 1.0, numberOfIntervals = 500, tolerance = 1e-006, method = 'dassl', fileNamePrefix = 'BouncingBall', options = '', outputFormat = 'mat', variableFilter = '.*', cflags = '', simflags = ''",
    messages = "LOG_SUCCESS       | info    | The initialization finished successfully without homotopy method.
LOG_SUCCESS       | info    | The simulation finished successfully.
",
    timeFrontend = 0.03334629789025638,
    timeBackend = 0.05818852816547053,
    timeSimCode = 0.02908068832276598,
    timeTemplates = 0.04130980342652182,
    timeCompile = 4.495768417986718,
    timeSimulation = 0.135430370984969,
    timeTotal = 4.795528603068404
end SimulationResult;

To see the list of available OpenModelicaScripting API see (https://www.openmodelica.org/doc/OpenModelicaUsersGuide/latest/scripting_api.html