Err. -200303: External sample clock source...

Question

Dear Readers
I'm using Ni-DAQmx 8 and have a PCIe-6259 card.
I wrote the following code (in VC++ 6).
int main(int argc, char* argv[])
    int32       error=0;
    TaskHandle  taskHandle=0;
    uInt8      data[10]={1,2,4,8,16,32,64,128,256,0xFFFFFFFF};
    char        errBuff[2048]={'\0'};
    (error = DAQmxCreateTask("",&taskHandle));
    (error = DAQmxCreateDOChan(taskHandle,"Dev1/port0","",DAQmx_Val_ChanForAllLines));
    (error = DAQmxCfgSampClkTiming(taskHandle,NULL,1000.0,DAQmx_Val_Rising,DAQmx_Val_ContSamps,1000));
    error = DAQmxWriteRaw(taskHandle, 10, true, 10.0, data, NULL, NULL);
        if( DAQmxFailed(error) )
        DAQmxGetExtendedErrorInfo(errBuff,2048);
    ERROR: -200303: External sample clock source must be specified for this application
    error = DAQmxStartTask(taskHandle);
I See no output on the oscilloscope.
I tried to put in several values for ClockSource in DAQmxCfgSampClkTiming like Dev1/PFI0, .... - but it never worked.
Could anyone please help me?
Thanks...
Pascal

Answer 1

Hi Robert
Do yo mean something like this:
int main(int argc, char* argv[])
    int32       error=0;
    TaskHandle digiTaskHandle = 0;
    TaskHandle aiTaskHandle = 0;
    uInt32      data[10]={0xFFFFFFFF,2,4,8,16,32,64,128,256,0xFFFFFFFF};
    float64        dummyBuffer[10];
    char        errBuff[4096]={'\0'};
    error = DAQmxCreateTask("",&digiTaskHandle);
    error = DAQmxCreateTask("",&aiTaskHandle);
    error = DAQmxCreateDOChan(digiTaskHandle,"Dev1/port0","",DAQmx_Val_ChanForAllLines);
    error = DAQmxCreateAIVoltageChan(aiTaskHandle, "Dev1/ai0", "", DAQmx_Val_RSE, -5.0, 5.0, DAQmx_Val_Volts, "");
    error = DAQmxCfgSampClkTiming(aiTaskHandle, "/Dev1/ai/SampleClock", 1000.0, DAQmx_Val_Rising, DAQmx_Val_ContSamps, 1000);
    error = DAQmxCfgSampClkTiming(digiTaskHandle,"/Dev1/ai/SampleClock" ,1000.0,DAQmx_Val_Rising,DAQmx_Val_ContSamps,1000);
    error = DAQmxStartTask(aiTaskHandle);
ERROR:
"An attempt has been made to perform a route when the source and the destination are the same terminal.
In many cases, such as when configuring an external clock or a counter source, you must select a PFI, PXI Trigger, or RTSI line as the sou"
//    error = DAQmxReadAnalogF64(aiTaskHandle, 10, 20.0, DAQmx_Val_GroupByChannel, dummyBuffer, 10, NULL, NULL);
    if( DAQmxFailed(error) )
      DAQmxGetExtendedErrorInfo(errBuff,4096);
    error = DAQmxWriteRaw(digiTaskHandle, 10, true, 10.0, data, NULL, NULL);
    //error = DAQmxStartTask(aiTaskHandle);
    if( DAQmxFailed(error) )
      DAQmxGetExtendedErrorInfo(errBuff,2048);
    return 0;
Could you please explain me how to do it right?
Pascal