Can I use typedef in a C-file S-function?

I'm simulating some C code from an STM32 MCU in a Matlab Simulink model using a C-file S-Function. In my MCU code I use a typedef as follows:

typedef enum
{
    DECEL = 0,			//
    ACCEL = 1,			//
    COAST = 2           //
} PFD_State_t;

I'd like to use this typedef in my S-Function mdlUpdate function to compute my algorithm using a case statement based on the enum. How do I do this? Can I include my own custom *.h file when compiling the S-Function?

Thanks,

Brianinclde

[James Tursa]

You should be able to use any valid C/C++ code in an S-Function, including using header h files. Have you tried something that didn't work? Can you post it?

[Brian Tremaine]

I had not tried it until just now and it looks like it's working. The total model is not complete, but compiling does not return any complains.

I added the file phase_det.h in my local project directory where the *.slx file resides. In the S-Function file I added the line #include "phase_det.h".

In the mdlUpdate function I am declaring and assigning variables using the new type. It compiles without error; so no problems yet. I had seen some Matlab documentation on creating custom typedefs for Simulink and that was rather confusing to me, hence my question.

Thanks,

Brian