Non-static tunable parameters in C++ class code generation.

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db1024 2019-5-7

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https://ww2.mathworks.cn/matlabcentral/answers/460802-non-static-tunable-parameters-in-c-class-code-generation

回答： David Balbuena 2023-7-26

Hello,

I use Simulink Coder and Embedded Coder to auto-generate a C++ class from a Simulink model. The Simulink model contains only Simulink function blocks (Simulink/User-Defined Functions/Simulink Function) on the root level. The C++ class is instantiated several times from a C++ wrapper and its functions (Simulink function blocks) are called. A parameter structure with a bus data type in the base workspace is used to parametrize the Simulink function blocks. The storage class of the parameter structure is set to Model default.

The code generation uses the following settings:

Code interface packaging: C++ class
Parameter visibility: public

In MATLAB R2018b the generated C++ class contains:

// Class declaration for model Test
class TestModelClass {
    // public data and function members
  public:
    // Tunable parameters
    P_Test_t Test_P;

In MATLAB R2019a the generated C++ class contains:

// Class declaration for model Test
class TestModelClass {
    // public data and function members
  public:
    // Tunable parameters
    static P_Test_t Test_P;   

The only difference is the static keyword for the tunable parameters.

As a result, I cannot change the tunable parameters for a single instance, since the parameters are declared as static and, therefore, shared across all instances. Is there a possibility to avoid the static keyword or should I use a different approach in MATLAB R2019a?

Thx for helping...