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How to create union in simulink

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WJKIM on 8 May 2024
Commented: WJKIM on 13 May 2024
I have a question about how to union in simulink in simulink coder.
I know how to create the bus of struct using the 'Simulink bus' in dictionary file. (*.sldd)
However, i can't see the part that creates the union.
Does Mathoworks support the method of generating code an union as shown below?
If so, could you tell me how?
thank you
typedef union
uint32 R;
uint16 H;
} Test_u;

Answers (2)

Anurag on 8 May 2024
You can refer to following file exchange link to get more information:
I hope this helps you resolve your query
WJKIM on 10 May 2024
Thank you for feedback.
I will try it
WJKIM on 13 May 2024
I have a question about your link.
I found the 'TempBus' in *.m file. And its configuration of code generation is as follow:
Data scope : Imported
Header file : DataTypeImport.h
However, i don't find the DataTypeImport.h file.
Could you tell me where it is? How can i get that?

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Angelo Yeo
Angelo Yeo on 8 May 2024
Current Simulink bus does not support union. Could we get a clearer understanding of why you want to realize the Simulink.Bus object as a union in the generated code? Is there any particular use case for this request?
  1 Comment
WJKIM on 10 May 2024
I respond to that.
If there are many flags (for example, Fault Flags), i can save memory space by using union.
This is only my opinion.

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