Change parameters in Simscape model executable

I converted a Simscape model to C code and Matlab generated a .exe file as well. The idea is to deploy this model without giving access to the model content. The end-user will use Matlab to run this executable.

The executable runs and produces correct results, however I cannot figure out how to change the parameters used for the simulation.

Attached is a basic example where I would like to be able to change the value of the AC Voltage Source peak amplitude, which is currently given by a workspace variable.

Answer 1

[Urmila Rajpurohith]

you can follow below steps to change parameters in Simscape model executable

• In Preference -> Simscape enable "Show runtime parameter settings".

• Ensure that you have a Simulink parameter that defines the specified Run-time parameter you want to change.

• Set the parameter to Run-time.

• Ensure the Simulink parameter's storage class is "Model Default".

• Enable "Generate Example main program" in Simulink Configuration Parameters under Code Generation > Templates > Custom Templates.

• Enable "Generate C API for Parameters" in the Configuration Parameters under Code Generation > Interface > Data Exchange Interface.

• Generate code for the model.

You will have to edit the example main file to set the value for the parameter you want to change, but a function should be produced that looks like "rtDataAddrMap". Inside the main function before "rt_OneStep()" is called, handle the value for the tune-able parameter.

[Antonin Berthelot]

Thank you for your answer!

In the end, some of the parameters I wanted to change were compile-time only unfortunaly. I'm afraid I will have to wait for a Matlab update before being able to generate C code for this specific Simscape model.

However, Matlab support suggested a workaround that allows me to deploy the Simscape model without giving access to the content:

1) Group all Simscape blocks in a Subsystem

2) Create a mask and promote the necessary parameters (see: https://nl.mathworks.com/help/physmod/simscape/lang/converting-subsystems-into-composite-components.html )

3) Generate ssc code from the subsystem.

4) Protect the ssc code.

5) Build a Simscape block from it.