Writing S-Functions

S-Function Examples

Most S-Function blocks require the handling of states, continuous or discrete. The following sections discuss common types of systems that you can model in Simulink with S-functions:

• Continuous state
• Discrete state
• Hybrid
• Variable step sample time
• Zero crossings
• Time-varying continuous transfer function

All examples are based on the C MEX-file S-function template sfuntmpl_basic.c and on sfuntmpl_doc.c, which contains a discussion of the S-function template.

Checking Array Bounds

Example of a Continuous State S-Function