call MEX-Funcion in a simulink userdefined block

Question

omid jab 2013-4-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/73755-call-mex-funcion-in-a-simulink-userdefined-block

Hi, I have a MEX-function that have several inputs and 2 outputs. In addition I creat a simulink model whit several blocks. I need to call the MEX-Function whit these blocks in the model. how can I do it? It's important for me that arrive to minimum executing and calling time.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Kaustubha Govind 2013-4-30

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/73755-call-mex-funcion-in-a-simulink-userdefined-block#answer_83984

MEX-functions can essentially be called just like any other MATLAB function. Please see the available MATLAB Function blocks to find a Simulink block that can be used to execute a MATLAB function.

6 个评论
显示 4更早的评论隐藏 4更早的评论

omid jab 2013-5-1

编辑：omid jab 2013-5-1

在 MATLAB Online 中打开

thanks dear Kaustubha,I have a MEX-file only. this Mex-file name is "Screen.mexw64", I fond it in psychtoolbox (www.psychtoolbox.org). but I don't have "Screen.c" and "Screen_wrapper.c". I can call it from "MATLAB Fcn" block. but this block is not fast enough. How can I call "Screen.mexw64" as a C-function in "S-Function Builder" for creat a "Level2 matlab s-function"? I use below cod in "s-function builder" block. this cod generate "example.c" and "example_wrapper.c" and "example.mexw64". but when I run my model (tha included genarated MEX-file), MATLAB show me a "matlab system error" window.

*typedef int (__cdecl *MYPROC)(int, mxArray[], int, const mxArray*[]); int nlhs=1; mxArray plhs[2]; int nrhs=1; const mxArray *prhs[2];

    HINSTANCE hinstLib; 
    MYPROC ProcAdd; 
    BOOL fFreeResult, fRunTimeLinkSuccess = FALSE;
    O1 = 1;
     hinstLib = LoadLibrary(TEXT("Screen.mexw64")); 
     if (hinstLib != NULL)
     {
         ProcAdd = (MYPROC) GetProcAddress(hinstLib, "mexFunction");
         if (NULL != ProcAdd) 
         {
             fRunTimeLinkSuccess = TRUE;
//             (ProcAdd) (nlhs, plhs, nrhs, prhs);
             (ProcAdd) ('OpenWindow',0);
         }
         fFreeResult = FreeLibrary(hinstLib);
     }
     if (! fRunTimeLinkSuccess) 
          printf("unable to call the other MEX file\n");*