float64 readAnalog(char eingangNr = '0'){ //Default Eingang = 0
// Task parameters
TaskHandle taskHandle = 0;
// Channel parameters
char chan[8] = "Dev1/ai";
float64 min = 0.0;
float64 max = 5.0;
// Timing parameters
uInt64 samplesPerChan = 1;
// Data read parameters
float64 data;
int32 pointsToRead = 1;
int32 pointsRead;
float64 timeout = 10.0;
chan[7] = eingangNr;
DAQmxErrChk (DAQmxBaseCreateTask("",&taskHandle));
DAQmxErrChk (DAQmxBaseCreateAIVoltageChan(taskHandle,chan,"",DAQmx_Val_RSE,min,max,DAQmx_Val_Volts,NULL));
DAQmxErrChk (DAQmxBaseStartTask(taskHandle));
DAQmxErrChk (DAQmxBaseReadAnalogF64(taskHandle,pointsToRead,timeout,DAQmx_Val_GroupByChannel,&data,samplesPerChan,&pointsRead,NULL));
// printf ("Acquired reading: %f\n", data); //Debug
DAQmxErrChk (DAQmxBaseStopTask (taskHandle));
return data;
}
int main (int argc, char *argv[])
{
// Task parameters
int32 error = 0;
TaskHandle taskHandle = 0;
char errBuff[2048]= {'\0'};
int32 i;
// Channel parameters
char chan[] = "Dev1/ai0";
float64 min = -10.0;
float64 max = 10.0;
// Timing parameters
char source[] = "OnboardClock";
uInt64 samplesPerChan = 100;
float64 sampleRate = 1200.0;
// Data read parameters
#define bufferSize (uInt32)1000
float64 data[bufferSize];
int32 pointsToRead = -1;
int32 pointsRead;
float64 timeout = 10.0;
while(1) {
printf("new task\n\n");
DAQmxErrChk (DAQmxBaseCreateTask ("", &taskHandle));
DAQmxErrChk (DAQmxBaseCreateAIVoltageChan (taskHandle, chan, "", DAQmx_Val_NRSE, min, max, DAQmx_Val_Volts, NULL));
DAQmxErrChk (DAQmxBaseCfgSampClkTiming (taskHandle, source, sampleRate, DAQmx_Val_Rising, DAQmx_Val_FiniteSamps, samplesPerChan));
DAQmxErrChk (DAQmxBaseStartTask (taskHandle));
DAQmxErrChk (DAQmxBaseReadAnalogF64 (taskHandle, pointsToRead, timeout, 0, data, bufferSize, &pointsRead, NULL));
printf("pointsRead: %d\n",pointsRead);
// Just print out the first 10 points
for (i = 0; i < 8; ++i) {
printf ("%f\n", data[i]);
}
DAQmxBaseStopTask (taskHandle);
DAQmxBaseClearTask (taskHandle);
}
Error:
if (DAQmxFailed (error))
DAQmxBaseGetExtendedErrorInfo (errBuff, 2048);
if (taskHandle != 0)
{
DAQmxBaseStopTask (taskHandle);
DAQmxBaseClearTask (taskHandle);
}
if (error)
printf ("DAQmxBase Error %d: %s\n", error, errBuff);
return 0;
}
double DAQManager::getVoltage(){
float64 sum;
int32 read;
#ifdef _WIN32
DAQmxStartTask(adcTaskHandle);
trigger();
while(!dataAcquired);
dataAcquired=0;
DAQmxStopTask(adcTaskHandle);
#elif __APPLE__
/*bool32 isDone;
DAQmxBaseIsTaskDone(adcTaskHandle,&isDone);*/
DAQmxBaseReadAnalogF64(adcTaskHandle, SAMPLE_COUNT, 10.0, DAQmx_Val_GroupByScanNumber, data, SAMPLE_COUNT, &read, NULL);
/*while(!isDone);
DAQmxBaseStopTask(adcTaskHandle);
DAQmxBaseClearTask(adcTaskHandle);*/
#endif
sum = 0;
for (int i = 0; i < SAMPLE_COUNT; ++i){
sum += voltageData[i];
}
return sum / SAMPLE_COUNT;
}
