How to add Get function to the Simulink model generated code

Question

Oldrich 2024-4-22

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https://ww2.mathworks.cn/matlabcentral/answers/2110086-how-to-add-get-function-to-the-simulink-model-generated-code

编辑： MULI 2024-9-20，9:14

Hello,

I'm generation code from the Simulink model (2 inputs, three outpus). I'd like to add Get function for the output(s), e.g.:

RLS_OnOff LGTC_getRearLightOn(void)

{

return strVarRear.enuRearLightOn;

}

I tried it using Access Data Through Functions with Storage Class GetSet but not successfuly. In the Code Mapping, Data Defaults ribon, I updated Storage class for updates to the "GetSet". But during the code generation I received the folloiwng error message:

In model code mappings, default storage class for outports is set to 'GetSet', making generated code noncompliant with function prototype control feature. Set default storage class to 'Default'.

If I update it to Default to get rid of the error Get function is not created.

Does anybody know how to update the Code generation setting/code mapping to sucessfully build the model to get code containing the Get function for the output?

Thank you very much in advance

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Answer 1

MULI 2024-9-20，9:13

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编辑：MULI 2024-9-20，9:14

在 MATLAB Online 中打开

Hi Oldirch,

I understand that you are encountering errors when trying to generate code from your Simulink model when including a ‘Get’ function for the outputs.

To address this error, you will need to manually implement the ‘Get’ function in your code as follows,

Write a header file (e.g., ‘foo.h’) where you declare your ‘Get’ functions as ‘extern’.

Example:

            #ifndef FOO_H 
            #define FOO_H 
            extern RLS_OnOff LGTC_getRearLightOn(void); 
            #endif 

In your source file, implement the ‘Get’ functions.

             RLS_OnOff LGTC_getRearLightOn(void) 
             { 
             return strVarRear.enuRearLightOn; 
             } 

Go to Configuration Parameters > Code Generation > Custom Code and include your header file by adding ‘foo.h’ to include headers and set the correct path in include directories.
Also ensure that default storage class for outports is set to ‘Default’ to avoid any errors.