MATLAB: How to change tunable parameters in generated C++ class from private to public

c++ class accesscode generationsimulink codertunable parameters

Hello,

I have a simulink model with some tunable parameters. If these parameters are configured as "SimulinkGlobal", in the generated C++ code they will be defined in a structure and this structure is declared as a private element in the model class. I would like to access these parameters from another file. But if these parameters are configured as "ExportedGlobal", each of them will be defined as an extern variable in the generated code which is not what I want. Is it possible to gather all tunable parameters in one structure and make this structure a public element in the model class?

Thank you in advance

Best Answer

If you set parameter member visibility option to 'public' this will move the tunable parameters structure from private to public:

set_param(h, 'ParameterMemberVisibility', 'public');

Where h is the handle to your Simulink model.

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MATLAB: How to make workspace variables appear as class members of a C++ class in generated code

For getting per-instance members of a class,I have followed these steps:

1. In the Model Data editor, set these parameters to be of StorageClass Model Default

2. In Model configuration parameters (Model Settings) , under Code Generation->Optimization set the Default parameter behavior to be "Tunable"

The generated code creates a structure named - struct P_<model_name>_T_ in <model_name>.h. This structure contains the tunable parameters.

An instance of this structure is defined as a private static member of the class in<model_name>.h as shown below :

// private data and function members
 private:
   // Tunable parameters
   static P_<model_name>_T <struct_name>;

The current limitation here is that it is not possible to generate these as non-static members of the class.

MATLAB: How to declare class member data public

This behavior is supported by implementing the SUBSREF and SUBSASGN members for an object. These are invoked to handle the following cases:

A=MyClass(initial)
out = A(I)% Invoke out=A.SUBSREF(A,S)
out = A{I}
out = A.field
A(I) = in% Invoke A.SUBSASN(A,S,in)
A{I} = in
A.field = in

where S is a structure that describes the type of indexing.

More information about the SUBSASGN and SUBSREF commands can be found here:

https://www.mathworks.com/help/matlab/ref/subsasgn.html

https://www.mathworks.com/help/matlab/ref/subsref.html

Best Answer

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MATLAB: How to make workspace variables appear as class members of a C++ class in generated code

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