MATLAB: S function execution based on Simulation and RTW build

Question

I have a requirement to execute portion of S function based on if S function is invoked by Simulation or by RTW build.

I tried to use flags like MATLAB_MEX_FILE and MDL_RTW. But I couldn't make it working.

Any pointers how to differentiate these two situations?

Thanks.

Answer 1

Typically this is achieved by creating a TLC file for the S-function (see Inlining S-functions). The TLC implementation is used for code-generation, and the code in the MEX-file is used for simulation.