Why we cannot use S-function for real-time applications?

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Mohamed-Mourad Lafifi

Dear Mansour Bechar,

I suggest you to see links in topic.

-The S-Function Target (Real-Time Workshop User's Guide)

radio.feld.cvut.cz/matlab/toolbox/rtw/rtw_ug/sfunc_t2.html

-Writing S-Functions - COPPE / UFRJ

www2.peq.coppe.ufrj.br/Pessoal/Professores/Arge/COQ897/sfunctions.pdf

-C S-Function Techniques - dSPACE

www.dspace.com/shared/support/faqpdf/faq202.pdf

-Real-Time Simulation Technologies: Principles, Methodologies, and ...

https://books.google.dz/books?isbn=1439847231

-Simulink S-Function for RT-LAB - 1b - Creation and ... - Opal-RT

https://www.opal-rt.com/.../index.php?/.../Simulink+S-Function...

Best regards

Mansour Bechar

The links are very useful, thank you so much dear Mohamed-Mourad Lafifi

Benhaoua Mohammed Kamal

Additionnaly to the links of Mohamed-Mourad Lafifi, you van use this document:

http://www.lirmm.fr/~chemori/Temp/Matlab/sfunctions.pdf

Best Regards

Constantin Wiesener

You can directly generate real-time capable sfunctions if you have legacy C-code using the legacy code tool:

https://www.mathworks.com/help/simulink/sfg/integrating-existing-c-functions-into-simulink-models-with-the-legacy-code-tool.html

Or if you have matlab code you make it even simpler and use the matlab_code block. This gets directly generated to real-time C code.

Daniela Yamashita

Hello,

I have a similar problem, but I am struggling to solve it. When I try to build the model, I get the following error:

ntox86-g++-3.3.5: sfunc_teste2.o: No such file or directory

My S-function calls a .c file named "sfunc_teste2.c". It works very well in Simulink environment. However, when I build the model it fails to generate the code and do not find the file "sfunc_teste2.c".