S-Function creation for Target link generated code

Hello Team,

I am creating on S-Function creation for Target Link generated codes.

I tried Legacy tool, but Legacy tool works well only when the input parameters and the return type are properly defined.

Example: When i have a function like==> double Sum( double a, double b).

Using def.OutputFcnSpec = 'double y1 = doubleIt(double u1, double u2)'.

But Target Link generated code, the main function is Void.

Example: The function looks like this, Void Sum(Void), in Sum.c file.

Facing difficulty in creating S-Function for this.

Can you please suggest any work around for the above issue.

Regards

Santhosh A

Answer 1

[Sahas]

Hi @santhosh,

As per my understanding of the question, you would like a way to generate “S-function” using “legacy tool” for a function whose “return” and “argument” parameters are of “void” type.

I was able to create a small example for this, please follow the steps below to create the “S-function” with required specifications:

• Create two code files named "sum.c" and "sum.h" that contain a void function and the headers, respectively.

• Generate the S-function using “legacy code tool”.

• A Simulink model will open with the required “void” type block.

To know more about using the “legacy code tool”, it’s integration with C/C++ code and a few examples, refer to the following documentation links:

• https:/www.mathworks.com/help/simulink/slref/legacy_code.html
• https://www.mathworks.com/help/simulink/sfg/integrating-existing-c-functions-into-simulink-models-with-the-legacy-code-tool
• https://www.mathworks.com/help/rtw/ug/legacy-code-tool-examples.html

I hope this is beneficial!