S Function Builder - To implement existing C code

Hello,

I am working on Simulink, S-Function Builder Block. I have a query about that, to explain in brief.

I have a working C code, I have to implement this C code somehow in S-Function Builder block so that the code uses the real-time values from inputs and gives the necessary output according to the action of C code.

My question is where exactly to implement this C code ??

I hope you understand my question, please give me the possible solution.

Answer 1

[Sean de Wolski]

If you're using 18b, consider using the C Caller block:

https://www.mathworks.com/help/releases/R2018b/simulink/ug/integrate-ccode-ccaller.html

[Titus Edelhofer]

Good point. I've used it last week and it's simple to use!

[Ravikiran Nagaraja]

I am using 2013b version. Is the C Caller block availabe for this version?

Answer 2

[Titus Edelhofer]

Hi Ravikiran,

usually (as long as your working C code has no states) you simply put it into the "outputs" function of the S-function builder. Something like

y0[0] = yourWorkingCode(u0[0], u1[0]);

Titus