private void btnStart_Click(object sender, RoutedEventArgs e)
{
Mouse.OverrideCursor = Cursors.Wait;
try
{
// create the task and channel
myTask.AOChannels.CreateVoltageChannel(physicalChannelComboBox.Text,
"",
Convert.ToDouble(minimumTextBox.Text),
Convert.ToDouble(maximumTextBox.Text),
ni.AOVoltageUnits.Volts);
// verify the task before doing the waveform calculations
myTask.Control(ni.TaskAction.Verify);
// calculate some waveform parameters and generate data
FunctionGenerator fGen = new FunctionGenerator(
myTask.Timing,
edfrequency.Text,
edsamplesPerBuffer.Text,
edcyclesPerBuffer.Text,
signalTypeComboBox.Text,
edamplitude.Text);
// configure the sample clock with the calculated rate
myTask.Timing.ConfigureSampleClock("",
fGen.ResultingSampleClockRate,
ni.SampleClockActiveEdge.Rising,
ni.SampleQuantityMode.ContinuousSamples, 1000);
ni.AnalogSingleChannelWriter writer =
new ni.AnalogSingleChannelWriter(myTask.Stream);
//write data to buffer
writer.WriteMultiSample(false, fGen.Data);
profilechart.SetData(fGen.Data);
//start writing out data
myTask.Start();
btnStart.IsEnabled = false;
btnStop.IsEnabled = true;
timer.IsEnabled = true;
}
catch (ni.DaqException err)
{
timer.IsEnabled = false;
MessageBox.Show(err.Message);
myTask.Dispose();
}
Mouse.OverrideCursor = Cursors.Arrow;
}
private void Button_Click(object sender, RoutedEventArgs e)
{
Mouse.OverrideCursor = Cursors.Wait;
try
{
using (ni.Task myTask = new ni.Task())
{
myTask.AOChannels.CreateVoltageChannel(physicalChannelComboBox.Text, "aoChannel",
Convert.ToDouble(minimumValue.Text), Convert.ToDouble(maximumValue.Text),
ni.AOVoltageUnits.Volts);
ni.AnalogSingleChannelWriter writer = new ni.AnalogSingleChannelWriter(myTask.Stream);
writer.WriteSingleSample(true, Convert.ToDouble(voltageOutput.Text));
}
}
catch (ni.DaqException ex)
{
MessageBox.Show(ex.Message);
}
Mouse.OverrideCursor = Cursors.Arrow;
}