Create C/C++ S-Functions
R2026bWrite S-functions using C or C++ code
You can create C/C++ S-functions by writing an S-function from scratch, using the S-function builder, or using the Legacy Code Tool. Each of these approaches involves a tradeoff between the ease of writing an S-function and the features supported by the S-function.
Blocks
 | S-Function | Include S-function in model |
 | S-Function Builder | Integrate C or C++ code to create S-functions |
Topics
About C/C++ S-Functions
- Create and Implement a Basic C MEX S-Function
Construct the code to create an S-function. - Simulink Engine Interaction with C S-Functions
Learn how the Simulink® engine interacts with a C S-function to create and debug your own C S-functions. - S-Function Callback Methods
Implement S-function callback methods. - S-Function SimStruct Functions
Access Simulink data structure through SimStruct macros and functions.
Create C S-Functions
- Templates for C S-Functions
Use code templates as starting points for writing your own C S-functions. - C MEX S-Function Examples
Model systems through C MEX S-function examples. - S-Function Examples
Create various types of S-functions and S-function features. - MATLAB Data in C S-Functions
PerformmxArraymanipulation in C S-functions. - Convert Level-1 C MEX S-Functions
Convert S-functions written for earlier Simulink releases to work with the current version.
Create C++ S-Functions
- Create C++ Source File
Create a C++ S-function from a C S-function. - Make C++ Objects Persistent
Create C++ objects that persist across invocations of the S-function. - Build C++ S-Functions
Build a C++ S-function.
