Call C Functions Using C Caller Block

This example shows how to use the C Caller block to call your handwritten C functions.

In this example, five custom C functions are defined in my_func.h and implemented in my_func.c.

The header file and the source file are specified in the Simulation Target pane of the Model Configuration Parameters. Then C functions can be called via C Caller blocks. For example, the block add adds a signal and a constant together and the block timesK multiplies the signal by a parameter K. The C Caller block supports C structure and enumeration types. Use command Simulink.importExternalCTypes to import these types into Simulink as matching Simulink.Bus objects or Simulink.IntEnumType classes.

Set up custom C code in model configuration

Add '#include "my_func.h"' to ''Configuration Parameters > Simulation Target > Include headers'' field.

Add 'include' to ''Configuration Parameters > Simulation Target > Include directories'' field.

Add 'src/my_func.c' to ''Configuration Parameters > Simulation Target > Source files'' field.