This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English verison of the page.

Note: This page has been translated by MathWorks. Please click here
To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

S-Function SimStruct Functions

About SimStruct Functions

The Simulink® software provides a set of functions for accessing the fields of an S-function's simulation data structure (SimStruct). S-function callback methods use these functions to store and retrieve information about an S-function.

Language Support

Some SimStruct functions are available only in some of the languages supported by the Simulink software. The reference page for each SimStruct macro or function lists the languages in which it is available and gives the syntax for these languages.

    Note   Most SimStruct functions available in C are implemented as C macros. Individual reference pages indicate any SimStruct macro that becomes a function when you compile your S-function in debug mode (mex -g).

The SimStruct

The file simstruc.h is a C language header file that defines the Simulink data structure and the SimStruct access macros. It encapsulates all the data relating to the model or S-function, including block parameters and outputs.

There is one SimStruct data structure allocated for the Simulink model. Each S-function in the model has its own SimStruct associated with it. The organization of these SimStructs is much like a directory tree. The SimStruct associated with the model is the root SimStruct. The SimStructs associated with the S-functions are the child SimStructs.

Was this topic helpful?