Writing Fixed-Point S-Functions

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This appendix discusses the API for user-written fixed-point S-functions, which enables you to write Simulink C S-functions that directly handle fixed-point data types. Note that the API also provides support for standard floating-point and integer data types. You can find the files and demos associated with this API in the following locations:

• matlabroot/simulink/include/

• matlabroot/toolbox/simulink/fixedandfloat/fxpdemos/

• Data Type Support

• Structure of the S-Function

• Storage Containers

• Data Type IDs

• Overflow Handling and Rounding Methods

• Creating MEX-Files

• Fixed-Point S-Function Examples

• API Function Reference

Prepare for Code Generation

Data Type Support

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