使用LABWINDOWS/CVI调用MATLAB作为后台的数据传输的问题

feitengyu · 发表于 2013-5-13 19:03:21

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使用LABWINDOWS/CVI调用MATLAB作为后台的数据传输的问题

通过create activeX cnotroler...生成成的的函数中有一个MLApp_DIMLAppGetWorkspaceData，函数定义如下：
HRESULT CVIFUNC MLApp_DIMLAppGetWorkspaceData (CAObjHandle objectHandle,
                                             ERRORINFO *errorInfo,
                                             const char *name,
                                             const char *workspace,
                                             VARIANT *pdata);

其中VARIANT *pdata这个应该怎么用？这个应该是数据输出

如何控制LABWINDOWS/CVI来获取MATLAB的计算数据？下面的代码目前还存在问题，无法获取到数值
完整代码见附件

int CVICALLBACK runMCB (int panel, int control, int event,
      void *callbackData, int eventData1, int eventData2)
{
int       status;

char       filename[300];

char       number[300];
int       result    = 0;
int i;

////////////////

double    time[256] = { 0 };
double    freq[128];
double    vect_r[256],vect_i[256];
double    *vecReal = NULL;
double    *vecImag = NULL;

size_t
dim1;
size_t
dim2;

//////////////////////////////////////////

static char pathname[MAX_PATHNAME_LEN], dirname[MAX_PATHNAME_LEN];
double  num,num1;
static FILE *file_handle;

char       *cStr    = NULL;



char DA[3200];

double tmp1,tmp2;

  VARIANT DATA1;

  int DATA2[5];


switch (event)
      {
      case EVENT_COMMIT:

CA_VariantSetEmpty(&DATA1);

file_handle = fopen ("C:\\matlab\\matlabfiletest\\test.txt", "w+");

  result = RunMatlabCommand(hMatlab,"x=1;");

  result = RunMatlabCommand(hMatlab,"y=2;");

  result = RunMatlabCommand(hMatlab,"z=x+y;");

  MLApp_DIMLAppGetWorkspaceData (hMatlab, NULL, "z", "base", &DATA1);



            fclose (file_handle);

if (result != SUCCESS)
         {
            MessagePopup ("ERROR", "Error in running MATLAB Script");
            return 0;
         }
         break;



      }
return 0;
}

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