How can I create a persistent structure variable that is initialized using external C-Code in Simulink 7.5 (R2010a)?

I would like to make a persistent Embedded MATLAB structure that is populated by an external C structure.

For example, I would like to use my custom function 'use_struct' to initialize an instance of a custom structure (MyStruct) to use the following values

my_instance.s1=42;

my_instance.s2=84;

Answer 1

[MathWorks Support Team]

The attached example demonstrates how you may externally initialize a persistent structure variable.

Note the following about the attached files:

1. The files "use_struct.h" and "use_struct.c" are included into the model through the following options:

use_struct.h

        Configuration Parameters> Simulation Target> Custom Code> Include custom C code in generated> Header file> #include "use_struct.h"

use_struct.c

       Configuration Parameters> Simulation Target> Custom Code> Include list of additional> Source files> use_struct.c

Check the option - Configuration Parameters> Real-Time Workshop> Custom Code> Use the same custom code settings as Simulation Target

2. In the Embedded MATLAB function block of TS_example.mdl, line 4 declares 'my_persistent_struct' as a persistent variable and then in lines 7 and 8 this persistent variable is first initialized to be a structure and then overwritten by a call to the custom C-code ('use_struct') that initializes this variable.

For more information, consult the documentation by executing the following at the MATLAB prompt:

doc struct