matlab function call,Function Call

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);

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;

}