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

Question

WJKIM 2024-1-12

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2069021-how-to-call-a-function-that-uses-a-function-pointer-argument-from-simulink

评论： Benjamin Thompson 2024-1-27

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;

}

2 个评论
显示无隐藏无

madhan ravi 2024-1-12

Did you try the suggested actions?

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

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Benjamin Thompson 2024-1-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2069021-how-to-call-a-function-that-uses-a-function-pointer-argument-from-simulink#answer_1393776

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.

2 个评论
显示无隐藏无

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 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.

请先登录，再进行评论。