Simultaniously Input / Output

[doctorbluex]

Hello,

i tried to Output an analog signal and read it simultaneously with  Borland C++ Builder 6.0 and a NI-DAQ 6115 Card.

That is the code I’m using:

/*********************************************/

/*/ DAQmx Configure Code
/*********************************************/
/*SEND OUTPUT*/
DAQmxErrChk (DAQmxCreateTask("",&taskHandle));
DAQmxErrChk (DAQmxCreateAOVoltageChan(taskHandle,"Dev1/ao0","",-10.0,10.0,DAQmx_Val_Volts,NULL));
DAQmxErrChk (DAQmxCfgSampClkTiming(taskHandle,"",sampleRate,DAQmx_Val_Rising,DAQmx_Val_FiniteSamps,transcount));

/*READ AI0*/

DAQmxErrChk (DAQmxCreateTask("",&taskHandle1));

DAQmxErrChk (DAQmxCreateAIVoltageChan(taskHandle1,"Dev1/ai0","",DAQmx_Val_Cfg_Default,-10.0,10.0,DAQmx_Val_Volts,NULL));

DAQmxErrChk (DAQmxCfgSampClkTiming(taskHandle1,"",100,DAQmx_Val_Rising,DAQmx_Val_FiniteSamps,1000));

/*********************************************/

/*/ DAQmx Write Code
/*********************************************/

DAQmxErrChk (DAQmxWriteAnalogF64(taskHandle,1000,0,10.0,DAQmx_Val_GroupByChannel,voltageOutput,&written,NULL));

/*********************************************/

/*/ DAQmx Read Code
/*********************************************/

DAQmxErrChk (DAQmxReadAnalogF64(taskHandle1,10000,10.0,DAQmx_Val_GroupByChannel,input1,10000,&read,NULL));

/*********************************************/

/*/ DAQmx Start Code
/*********************************************/
DAQmxErrChk (DAQmxStartTask(taskHandle1));
DAQmxErrChk (DAQmxStartTask(taskHandle));

[doctorbluex]

second part

---------------------------

/*********************************************/
/*/ DAQmx Stop Code
/*********************************************/

DAQmxStopTask(taskHandle);

DAQmxClearTask(taskHandle); DAQmxStopTask(taskHandle1);
DAQmxClearTask(taskHandle1);

Error:

if( DAQmxFailed(error) )
DAQmxGetExtendedErrorInfo(errBuff,2048);
if( taskHandle!=0 ) {

/*********************************************/

 /*/ DAQmx Stop Code
/*********************************************/

DAQmxStopTask(taskHandle);

DAQmxClearTask(taskHandle);

DAQmxStopTask(taskHandle1);

            DAQmxClearTask(taskHandle1);

      }

      if( DAQmxFailed(error) ){

            Application->MessageBoxA(("DAQmx Error: %s\n",errBuff),"ERROR");

                errorLog = true;

}

  for(int i = 0; i < 1000; i++){

   asLine += input1[i];

asLine += ";";
              asLine += "\n";

  }

But somehow I don’t get the input I expected. Have You any idea how I can solve this problem?

Thanks in advance