How do I build my model containing a C-MEX S-function if I don't have the S-function C source file using Simulink Coder?

I was given a model which contains an S-function and the MEX file for the S-function. I need to build this model but I do not have the source file used in the S-function block. With this set up, how should I build my model?

 

Answer 1

[MathWorks Support Team]

You can build the model even though you do not have the source file for the S-function. Please refer to the information below.

The person who gave you the model and MEX file, should follow the steps below: 

1. Build any model that contains the desired S-function, say mysfunction.c using Simulink Coder.
2. The generated RTW folder (modelname_target_rtw) will contain a file named mysfunction.obj.

They should send the following files to you: 

• Simulink Model
• S-function object (mysfunction.obj)
• MEX-file generated (mysfunction.mexext, which is mysfunction.mexw64 for 64-bit Windows OS) 

Once you have these files, you should follow the steps below:

1. Place the Model and MEX-file (mysfunction.mexext) in one directory.
2. Create another folder in this directory with the name : modelname_targetname_rtw (This would have been the name of the generated RTW folder. For example for GRT Target, the foldername will be modelname_grt_rtw ).
3. Place the object file (mysfunction.obj) in the above folder.
4. Build code for your model.