All GPIB cards available in system

I would like to find the names of all the available GPIB cards present in a computer. How in LabWindows/CVI? For DAQmx boards, it is possible by the DAQmxGetSystemInfoAttribute function with the first parameter to the DAQmx_Sys_DevNames value. However, I can't find similar function for GPIB cards.

Thanks for the following tips. Querying all the possible GPIB Board is not good solution because I n know the range of numbers of boards of appeal. I think I found the best solution based on the viFindRsrc and viFindNext functions. The idea was to correctly specify the second parameter of the viFindRsrc function. The code is listed below. Maybe it helps someone. The function presented returns the table of pointers to string that describe all the available GPIB cards.

int FindGpibBoards (char ***gpibList){  ViStatus status;  ViSession defaultRM, instr;  ViFindList fList;  ViChar desc[VI_FIND_BUFLEN], *gpib;  ViUInt32 numBrds, brd=0;  int i;

  status = viOpenDefaultRM (&defaultRM);  if (status < VI_SUCCESS)  {    // Error initializing VISA ... exiting    return -1;  }

  // Find all GPIB boards in the system  status = viFindRsrc (defaultRM, "GPIB[0-9]*::INTFC", &fList, &numBrds, desc);  if (status < VI_SUCCESS)  {    // Error finding resources ... exiting    viClose (defaultRM);    // 0xBFFF0011 = Insufficient location information or the device or resource    // is not present in the system. It happens when there is not a GPIB board.    if (status == 0xBFFF0011)      return -2;    else      return -3;  }

  if (numBrds > 0)  {    *gpibList = (char **)malloc (numBrds*sizeof(char **));    while (brd < numBrds)    {      gpib = strtok (desc, ":");      *(*gpibList+brd) = malloc ((strlen(gpib)+1)*sizeof(char));      strcpy (*gpibList[brd], gpib);      brd++;      if (brd < numBrds)        viFindNext (fList, desc);    }  }  viClose (defaultRM);

  return (int)numBrds;}

Tags: NI Software

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