continuous data acquisition, visual c, excel

[kg_yan]

 

Hi,

I’m trying to build an MFC application with MSVC++6, where I would continuously acquire
samples from 2 channels of a USB-6289. I’m using the DAQmx C functions. First I declear the callback fun as static function in the dialog class:

       class DataCollectionWin : public CDialog 
{.....

static int32 CVICALLBACK EveryNCallback(TaskHandle taskHandle, int32 everyNsamplesEventType, uInt32 nSamples, void *callbackData);
static int32 CVICALLBACK DoneCallback(TaskHandle taskHandle, int32 status, void *callbackData);

CString str;
 char* FileName;

} 

Click "start tracking" to start data collection and save to an excel file:

void DataCollectionWin::OnStartTracking()
{
    // TODO: Add your control notification handler code here

     
float64 data[2000];
int32    read=0;
int32 errorcode=0;
int i,length;
int32   error=0;
    char    errBuff[2048]={'\0'};
    

//********Connect DAQ channels***********


    
    CString    szButtonText;
    CString szFilter = "Excel Files (*.xls)|*.xls|All Files (*.*)|*.*||";
    CFileDialog dlg(FALSE,"Excel",NULL,OFN_OVERWRITEPROMPT,szFilter);

    GetDlgItem( IDStartTracking)->GetWindowText( szButtonText );

    /* if the text read Start, then we start, else we stop tracking */
    if (  szButtonText == "Start Tracking" )
    {
       
          if(dlg.DoModal()==IDOK)
    {
        str=dlg.GetPathName ();
        UpdateData(TRUE);

        if(!cfData.Open (str,CFile::modeCreate|CFile::modeReadWrite))
        {
        
            MessageBox("create/read/write file fail","warning", MB_ICONWARNING | MB_OK);

        }
    
        length=str.GetLength();
        FileName=new char[length];
        for(i=0;i<length;i++)
        *(FileName+i)=str.GetAt(i);
        *(FileName+length)=NULL;

   DAQmxErrChk(DAQmxCreateTask ("connect", &taskHandle)); DAQmxErrChk(DAQmxCreateAIVoltageChan(taskHandle,"Dev1/ai0,Dev1/ai1","",DAQmx_Val_Cfg_Default,-10.0,10.0,DAQmx_Val_Volts,NULL));
        DAQmxErrChk(DAQmxReadAnalogF64(taskHandle,1000,-1,DAQmx_Val_GroupByChannel,data,2000,&read,NULL));
        DAQmxErrChk (DAQmxRegisterEveryNSamplesEvent(taskHandle,DAQmx_Val_Acquired_Into_Buffer,1000,0,EveryNCallback,NULL));
        DAQmxErrChk (DAQmxRegisterDoneEvent(taskHandle,0,DoneCallback,NULL));

        Error:
    if( DAQmxFailed(error) ) {
        DAQmxGetExtendedErrorInfo(errBuff,2048);
        MessageBox(errBuff);
        DAQmxStopTask(taskHandle);
        DAQmxClearTask(taskHandle);
            return;
    }

        GetDlgItem( IDStartTracking )->SetWindowText("Stop Tracking");
    
    }

    }
    else
    //    nStopTracking();
    {    GetDlgItem( IDStartTracking )->SetWindowText("Start Tracking");
    DAQmxStopTask(taskHandle);
    DAQmxClearTask(taskHandle);
     cfData.Close();

    }
    
    }

static int32 EveryNCallback(TaskHandle taskHandle, int32 everyNsamplesEventType, uInt32 nSamples, void *callbackData)
{
    int32       error=0;
    char    errBuff[2048]={'\0'};
    static int  totalRead=0;
    int32       read=0;
    float64     data[1000];
    FILE *datafile;
    datafile = fopen(FileName,"w+");
    int i;
 

 if (datafile == NULL )
      printf( "The file was not opened\n" );

    /*********************************************/
    // DAQmx Read Code
    /*********************************************/
    DAQmxErrChk(DAQmxReadAnalogF64(taskHandle,1000,-1,DAQmx_Val_GroupByChannel,data,2000,&read,NULL));
    printf("data number: %d\n",read);
        if( read>0 ) {
         
    for (i=0;i<2000;i++)
    {
            fprintf(datafile,"%f\n",data[i]);
        }

        fflush(stdout);
     }
  
       
             Error:
    if( DAQmxFailed(error) )
    {
        DAQmxGetExtendedErrorInfo(errBuff,2048);
        DAQmxStopTask(taskHandle);
        DAQmxClearTask(taskHandle);
        printf("DAQmx Error: %s\n",errBuff);
            return 0;
    }

}

static int32 CVICALLBACK DoneCallback(TaskHandle taskHandle, int32 status, void *callbackData)
{
    int32   error=0;
    char    errBuff[2048]={'\0'};

    printf("hello"); 

    // Check to see if an error stopped the task.
    DAQmxErrChk (status);

Error:
    if( DAQmxFailed(error) ) {        DAQmxGetExtendedErrorInfo(errBuff,2048);
              DAQmxClearTask(taskHandle);
            }
    return 0;
}

 Can anyone check the codes for me? when i run the program, no data is save into the excel file. It seems the EveryNCallback function does not work, because when I put "printf("hello"); "for checking,nothing happens. Also there is an debug assertion error (see enclosure). 

Actually how does the callback function work to continuously collect the data? 

Thank you!

kg 

[kgy]

Can anyone help me on it, please?

[Doiron]

Hello,

So is your read code not working at all? Are you getting data and just not able to write it to excel?

Have you tried the ANSI C examples? Which version of Measurement Studio are you using?

[kgy]

Hi, David,

Thank you very much for your reply. When I run the ANSI C sample, it seems ok. I tried to use DAQmxReadAnalogF64 to collect 2000 samples and save to a CFile. No problem. But when I add the everyNCallback to continuously collect data, then it seems not work. Do I need to add head file for measurement studio? I only add "NIDAQmx.h". Must I use measurement studio to complete this task? I thought I can directly use NIDAQmx library for this purpose. Please advice. Thanks!

[Doiron]

Hello,

You can use the DAQmx functions, yes. I was just curious how Measurement Studio played into this equation since you posted in the Measurement Studio forum rather than the Multifunction DAQ forum. Have you tried the "Cont Acq - Int Clk" example? This should give you a template for acquiring data continuously using ANSI C.

[kgy]

I was directed to this forum. I pasted similar questions in Multifunction DAQ forum. But was told I should come here for help. I tried the example you mentioned. Seems no problem. Anyone can help checking the codes please?

[Doiron]

Hello,

It looks the original post was in the LabVIEW forum. For future reference, the best place for questions about the DAQmx functions or programming in DAQmx (even text-based) is the Multifunction DAQ forum, this forum is for questions about Measurement Studio functions or programming.

All that aside, have you tried the standard debugging methods? IE diff-ing your program with the example, single-stepping to see exactly where you are getting the error? Have you tried using any other callbacks successfully? Did you check the C++ documentation for asserts as mentioned in that error?

[kgy]

I tried to debug. It didn't get into the everyNcallback function. I get following error information. It seems that I miss sth. Can anyone give me a clue?

Loaded 'ntdll.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\kernel32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nicaiu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nipalu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nipalut.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\msvcr71.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nipal32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\advapi32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\rpcrt4.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\secur32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\setupapi.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\msvcrt.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\gdi32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\user32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\shell32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\shlwapi.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\niorbu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nirpc.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\wsock32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\ws2_32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\ws2help.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nimdbgu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nimstsu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nimxdfu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nidmxfu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nimru2u.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nidimu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nimxpu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nimhwcfu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\ole32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\oleaut32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nimercu.dll', no matching symbolic information found.

[kgy]

Loaded symbols for 'C:\WINDOWS\system32\MFC42D.DLL'
Loaded symbols for 'C:\WINDOWS\system32\MSVCRTD.DLL'
Loaded symbols for 'C:\WINDOWS\system32\MFCO42D.DLL'
Loaded 'C:\WINDOWS\system32\shimeng.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\imm32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\lpk.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\usp10.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.2982_x-ww_ac3f9c03\comctl32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\comctl32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\uxtheme.dll', no matching symbolic information found.
Loaded 'C:\Program Files\Aculearn\AcuSTUDIO5\MsnHookDll.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\winmm.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\serwvdrv.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\umdmxfrm.dll', no matching symbolic information found.
Loaded 'C:\Program Files\SweetIM\Messenger\mgAdaptersProxy.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\MSCTF.dll', no matching symbolic information found.
Loaded 'C:\kaiguo\Powerword 2003\Cjktl32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\Downloaded Program Files\BDPlugin.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\version.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\apphelp.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\MSCTFIME.IME', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\comdlg32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\clbcatq.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\comres.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\cscui.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\cscdll.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\browseui.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\userenv.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\ntshrui.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\atl.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\netapi32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\shdocvw.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\crypt32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\msasn1.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\cryptui.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\wintrust.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\imagehlp.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\wininet.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\wldap32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\riched20.dll', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\MAX\mxs.dll', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\MAX\mxsutils.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\msvcp71.dll', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\MAX\mxsout.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\mswsock.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\hnetcfg.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\wshtcpip.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nismslu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nidevldu.dll', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\NI6535.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\nics.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\NIDSA.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\niem.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\nies.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\NIFILTER.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\NIHWDB.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\NIMAS.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\NISCXI.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\nisd.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\NISFT.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\niss.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\NISWCH.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\nitio.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\niwf.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\nixs.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\Compat\NI5690.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\Compat\NIDWG.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\Compat\NIHSD.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\Compat\NIPS.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\Compat\NIRFSA.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\Compat\NISL.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\Compat\NISRC.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\Compat\NISYNC.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\Compat\NITNR.sdc', no matching symbolic information found.
Loaded 'C:\Program Files\National Instruments\NI-DAQ\Caps\Compat\NITSU.sdc', no matching symbolic information found.

[kgy]

Loaded 'C:\WINDOWS\system32\nixsxu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nisciu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nicdru.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nimsdru.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nimsdxu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nicdxu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nitioru.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nixsru.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nicalgu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nisnseu.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\nilesru.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\browseui.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\shdocvw.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\crypt32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\msasn1.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\cryptui.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\wintrust.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\imagehlp.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\wininet.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\wldap32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\riched20.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\browseui.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\shdocvw.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\crypt32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\msasn1.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\cryptui.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\wintrust.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\imagehlp.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\wininet.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\wldap32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\riched20.dll', no matching symbolic information found.
The thread 0x1320 has exited with code 0 (0x0).
The thread 0xD20 has exited with code 0 (0x0).
The thread 0x11F0 has exited with code 0 (0x0).
The thread 0xD50 has exited with code 0 (0x0).
The thread 0xFF8 has exited with code 0 (0x0).
SCIFIS Project.exe DLL DETACH!!!!!
The thread 0x1058 has exited with code 0 (0x0).
Detected memory leaks!
Dumping objects ->
C:\Documents and Settings\Lei Fu\Desktop\SCIFIS Project\DataCollectionWin.cpp(221) : {186} normal block at 0x00DA73F0, 63 bytes long.
 Data: <C:\Documents and> 43 3A 5C 44 6F 63 75 6D 65 6E 74 73 20 61 6E 64
C:\Documents and Settings\Lei Fu\Desktop\SCIFIS Project\DataCollectionWin.cpp(221) : {157} normal block at 0x00DA6F20, 63 bytes long.
 Data: <C:\Documents and> 43 3A 5C 44 6F 63 75 6D 65 6E 74 73 20 61 6E 64
Object dump complete.
The thread 0x11AC has exited with code 0 (0x0).
The program 'C:\Documents and Settings\Lei Fu\Desktop\SCIFIS Project\Debug\SCIFIS Project.exe' has exited with code 0 (0x0).