Initialize Values to Inports in Embedded Coder

Hello all,

I am trying to initialize my Simulink model's inports with some variables. Currently I have done the same using the Root Inport Mapper and used a .mat file along with it to initialize my inports. The values are being initialized when I run the model although they do not show up in the model_init function in the generated C code of the model.

Can anyone tell me how to initialize values to inports that show up in the generated C code using Embedded Coder?

Answer 1

[Anudeep Kumar]

Hello Atif,

I've experienced a similar situation, and I found that Code Mappings provided an effective solution. In Simulink, Code Mappings are integral to the code generation process, allowing you to specify how model elements are represented in the generated code. This feature is especially beneficial when using Embedded Coder to produce high-quality C/C++ code. I recommend reviewing the Code Mapping documentation and exploring some examples to better understand the workflow based on your model's requirements.

Code Mapping Documentation:

https://www.mathworks.com/help/releases/R2023b/rtw/ref/codemappingseditorc.html

How to choose Data Configuration Approach: This page will help you answer various questions like what data elements to use, where to store the data, how to configure data to meet code generation objectives.

https://www.mathworks.com/help/releases/R2023b/rtw/ug/choose-a-data-configuration-approach.html

I hope these documentations help!

[Atif Penkar]

Hello Anudeep,

Thank you for your response.

I did check these documentations out, although I am still not able to find a way to initialize the inport values, even if I define them as ImportedExtern or ExportedGlobal. Do you have any specific information on that?

[Anudeep Kumar]

Hey Atif, If you dont mind, would you be able to share the model so that I can understand the issue and better help you solve the problem?

[Atif Penkar]

Hi Anudeep, unfortunately due to IP restrictions at my organization I can not share the model. If you have a sample model which I can refer, that would be really helpful.

[Anudeep Kumar]

I wanted to clarify our previous discussion regarding the use of root-level inports to map a MAT file to inports. I realize there was a misunderstanding on my part, as I have worked on just Code Mapping, which differs from your specific use case.

In my search for a solution, I discovered an example that demonstrates how to initialize root-level inports in the manner you require. I'm currently exploring how they set default values for these inports. Meanwhile, I've included a link to the relevant documentation. You might find it helpful to open the model and experiment with it yourself.

https://www.mathworks.com/help/releases/R2023b/ecoder/ug/removing-unnecessary-initialization-code.html

I have also attached a screenshot of model and the model itself.