Function Call - MATLAB & Simulink (original) (raw)
Main Content
This example shows how to generate a function call by adding a subsystem, which implements the operations that you want.
C Construct
void add_function(void) { y1 = u1 + u2; }
Procedure
1. Open example model ex_function_call.
The subsystem has two inputs and returns one output.
Selecting the Treat as atomic unit parameter enables parameters on the Code Generation tab. The Code Generation tab provides these customizations:
- Function packaging set to
Nonreusable function - Function name options set to
User specified - Function name specified as
add_function - File name options set to
Use function name
2. To build the model and generate code, press Ctrl+B.
Results
In ex_function_call.c, the function is called from ex_function_call_step:
/* Model step function / void ex_function_call_step(void) { / Outputs for Atomic SubSystem: '/Add_Subsystem' */ add_function();
/* End of Outputs for SubSystem: '/Add_Subsystem' */ }
The function prototype is externally declared through the subsystem file, add_function.h:
extern void add_function(void);
#endif /* add_function_h_ */
/*
- File trailer for generated code.
- [EOF] */
The function definition is in the subsystem file add_function.c:
void add_function(void) { /* Outport: '/y1' incorporates:
- Inport: '/u1'
- Inport: '/u2'
- Sum: '/Sum' */ rtY.y1 = u1 + u2; }