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How to create a S-function for targetlink generated code .

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Sumit
Sumit 2024-8-8
回答： Sahas 2024-8-20
I tried legacy tool for generating S-function which I was able to do .
eg. when I have a function with input parameters and return type well defined there is no issue .
When the function looks like this==>int sum (int a, int b) inside sum.c.
But in Targetlink generated code the main function is a void function.
eg. void sum (void), where i am struggling to create S-Function.
Can you please let me know any workaround for the same.
Regards
Sumit

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回答（2 个）

arushi
arushi 2024-8-12
Hi Sumit,
You may try creating an S-Function by managing the inputs and outputs through global variables or by wrapping the void function to fit the S-Function interface.Workaround Steps
  1. Wrap the void Function: Create a wrapper function that takes inputs and returns outputs, and inside this wrapper, call the original void function. The wrapper function will handle the interaction with the S-Function.
  2. Define Global Variables: Use global variables to pass inputs to the void function and retrieve outputs from it.
  3. Create the S-Function: Use the legacy code tool to create the S-Function for the wrapper function.
Hope this helps.
Sahas
Sahas 2024-8-20
Hi @Sumit,
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:
I hope this is beneficial!

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