private void Button_Click(object sender, RoutedEventArgs e)
{
Start.IsEnabled = false;
ni.Task myTask = new ni.Task();
try
{
// Create a new task
// Initialize local variables
double sampleRate = Convert.ToDouble(edRate.Text);
double rangeMinimum = Convert.ToDouble(edMin.Text);
double rangeMaximum = Convert.ToDouble(edMax.Text);
int samplesPerChannel = Convert.ToInt32(edchannel.Text);
// Create a channel
myTask.AIChannels.CreateVoltageChannel(physicalChannelComboBox.Text, "",
(ni.AITerminalConfiguration)(-1), rangeMinimum, rangeMaximum, ni.AIVoltageUnits.Volts);
// Configure timing specs
myTask.Timing.ConfigureSampleClock("", sampleRate, ni.SampleClockActiveEdge.Rising,
ni.SampleQuantityMode.FiniteSamples, samplesPerChannel);
// Verify the task
myTask.Control(ni.TaskAction.Verify);
// Prepare the table for data
InitializeDataTable(myTask.AIChannels, ref dataTable);
//acquisitionDataGrid.DataContext = dataTable.DefaultView;
//acquisitionDataGrid.ItemsSource = dataTable.DefaultView;
// Read the data
reader = new ni.AnalogMultiChannelReader(myTask.Stream);
data = reader.ReadWaveform(samplesPerChannel);
dataToDataTable(data, ref dataTable);
myTask.Dispose();
}
catch (ni.DaqException exception)
{
MessageBox.Show(exception.Message);
}
finally
{
myTask.Dispose();
Start.IsEnabled = true;
}
}
private void btnStart_Click(object sender, RoutedEventArgs e)
{
if (runningTask == null)
{
try
{
btnStop.IsEnabled = true;
btnStart.IsEnabled = false;
double rangeMinimum = Convert.ToDouble(edminimum.Text);
double rangeMaximum = Convert.ToDouble(edmaximum.Text);
double sampleRate = Convert.ToDouble(edRate.Text);
int samplePerChannel = Convert.ToInt32(edchannel.Text);
//// Create a new task
//myTask = new ni.Task();
//// Create a virtual channel
//myTask.AIChannels.CreateVoltageChannel(physicalChannelComboBox.Text, "",
// (AITerminalConfiguration)(-1), rangeMinimum,
// rangeMaximum, AIVoltageUnits.Volts);
//// Configure the timing parameters
//myTask.Timing.ConfigureSampleClock("", sampleRate,
// SampleClockActiveEdge.Rising, SampleQuantityMode.ContinuousSamples, samplePerChannel * 10);
//// Configure the Every N Samples Event
//myTask.EveryNSamplesReadEventInterval = samplePerChannel;
//myTask.EveryNSamplesRead += new EveryNSamplesReadEventHandler(myTask_EveryNSamplesRead);
//// Verify the Task
//myTask.Control(TaskAction.Verify);
//// Prepare the table for Data
//InitializeDataTable(myTask.AIChannels, ref dataTable);
//runningTask = myTask;
//analogInReader = new AnalogMultiChannelReader(myTask.Stream);
//runningTask.SynchronizeCallbacks = true;
//runningTask.Start();
// Create a new task
ni.Task myTask = new ni.Task();
// Create a virtual channel
myTask.AIChannels.CreateVoltageChannel(physicalChannelComboBox.Text, "",
(ni.AITerminalConfiguration)(-1), rangeMinimum,
rangeMaximum, ni.AIVoltageUnits.Volts);
// Configure the timing parameters
myTask.Timing.ConfigureSampleClock("", sampleRate,
ni.SampleClockActiveEdge.Rising, ni.SampleQuantityMode.FiniteSamples, samplePerChannel * 10);
myTask.Triggers.StartTrigger.ConfigureDigitalEdgeTrigger("/Dev4/PFI12", ni.DigitalEdgeStartTriggerEdge.Rising);
myTask.Triggers.StartTrigger.Retriggerable = true;
// Configure the Every N Samples Event
myTask.EveryNSamplesReadEventInterval = samplePerChannel;
myTask.EveryNSamplesRead += new EveryNSamplesReadEventHandler(myTask_EveryNSamplesRead);
// Verify the Task
myTask.Control(TaskAction.Verify);
// Prepare the table for Data
InitializeDataTable(myTask.AIChannels, ref dataTable);
runningTask = myTask;
analogInReader = new AnalogMultiChannelReader(myTask.Stream);
runningTask.SynchronizeCallbacks = true;
runningTask.Start();
}
catch (DaqException exception)
{
// Display Errors
MessageBox.Show(exception.Message);
runningTask = null;
btnStop.IsEnabled = false;
btnStart.IsEnabled = true;
}
}
}