Writing S-Functions    

Creating Code-Reuse-Compatible S-Functions

The code reuse feature of the Real-Time Workshop generates code for a subsystem in the form of a function that is invoked wherever the subsystem occurs in the model (see Nonvirtual Subsystem Code Generation Options in the online Real-Time Workshop documentation). If a subsystem contains S-functions, the S-functions must be compatible with the code reuse feature. Otherwise, the Real-Time Workshop may not generate reusable code from the subsystem or may generate incorrect code.

If you want your S-function to support the subsystem code reuse feature, you must ensure that the S-function meets the following requirements:

In addition to meeting the preceding requirements, your S-function must set the SS_OPTION_WORKS_WITH_CODE_REUSE flag (see ssSetOptions). This flag assures RTW that your S-function meets the requirements for subsystem code reuse.


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