How to call a function that uses a function pointer argument from Simulink?

2024 1 12
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更新时间：2024 1 27
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I want to load the following C code function as the C -Caller in the simulink.
There is no build error, but I can't find the function in the Function name.
I think, it can't recognize Void (*func) (CONST IF_AppDiagStatus_t), one of the argument of the function. (Use of function pointer)
Is there a way to solve this?
********************************************************************************************************************************************
void IF_AppDiagSetFuncForGetDiagStatus(void(*func)(CONST IF_AppDiagStatus_t), CONST App_ID_e appID)
{
if (appID < APP_ID_END)
{
appDiagGetFunc[appID].getDiagStatusFunc = func;
}
}

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WJKIM
WJKIM 2024-1-12
It doesn't seem to be associated with SUGESTED ACTIONS.
The functions mentioned in SUGESTED ACTIONS are different from the functions I mentioned.
The function name is similar, so it can be confusing.
IF_AppDiagSetFuncForGetDiagStatus
IF_AppDiagUpdateDiagStatus

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 采纳的回答

Benjamin Thompson
Benjamin Thompson 2024-1-21

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Simulink only supports certain data types as inputs to blocks: integers, double, single, busses, enumerations, or arrays of those basic types. How would Simulink know how to pass a memory address pointer to your block as an input? If your C code defines an array of C functions in appDiagGetFunc, can your block use an integer input for appID? Then Simulink can pass an integer to the C Caller block to select which function in appDiagGetFunc to call.

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WJKIM
WJKIM 2024-1-26
Hello, @Benjamin Thompson.
Thank you for answer.
How would Simulink know how to pass a memory address pointer to your block as an input?
> Actually, it is main point of my question how to pass memory address.
So, i requested the Mathworks support about this issue.
Then, Mathworks support reply was as follow.
"The C Caller block does not support code of type void pointer. Please refer to the answers below for cases similar to yours. In these cases, we recommend using the C Function block instead of the C Caller block. a video explaining how to use it can be found at the link below.
- Using the C Function Block to Integrate Custom Code in Simulink
https://www.mathworks.com/videos/using-the-c-function-block-to-integrate-custom-code-in-simulink-1612779540844.html "
If your C code defines an array of C functions in appDiagGetFunc, can your block use an integer input for appID?
> Yes, the appID defined in c code can be used.
Benjamin Thompson
Benjamin Thompson 2024-1-27
If your question has been answered please accept it. If you would like more help with the problem please provide more information and the Community can suggest different approaches.

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