/// <summary>
/// Start a constant output by the DAQ device. This function starts a task named "OutputTask",
/// Don't forget to stop it when it's no longer needed.
/// </summary>
/// <param name="voltage">the requested voltage to apply</param>
public void StartConstantOutputTask(double voltage)
{
int samplesPerChannel = 2500;
int sampleRate = 2500;
//
// generate output array
//
m_functionGenerator = new FunctionGenerator(samplesPerChannel, voltage, voltage);
//
// get the properties required for the output task
//
ContinuousAOTaskProperties outputProperties = new ContinuousAOTaskProperties(null, sampleRate, samplesPerChannel, voltage);
//
// create the output task
//
m_outputTask = m_daqController.CreateContinuousAOTask(outputProperties);
//
// create the writer of the output task
//
writer = new AnalogSingleChannelWriter(m_outputTask.Stream);
//
// write static voltage
//
writer.WriteMultiSample(true, m_functionGenerator.ConstWave);
}
/// <summary>
/// Create continuous Analog Out Task
/// </summary>
/// <param name="properties">The properties of the task</param>
/// <returns>The task to be activated</returns>
public Task CreateContinuousAOTask(ContinuousAOTaskProperties properties)
{
//
// Create analog output task with the specified name
//
Task analogOutputTask = new Task(c_refContAOTask);
//
// Define a voltage channel
//
AOChannel analogChannel = analogOutputTask.AOChannels.CreateVoltageChannel(Settings.Default.DAQPhysicalChannelName_IVOutput,
string.Empty, -properties.Amplitude, properties.Amplitude, AOVoltageUnits.Volts);
//
// Configure sampling clock, rate, number of samples
//
analogOutputTask.Timing.ConfigureSampleClock(string.Empty, properties.SampleRate, SampleClockActiveEdge.Rising,
SampleQuantityMode.ContinuousSamples, properties.SamplesPerChannel);
//
// allow regeneration of the writing process - that means the output will keep working until we stop or change it.
//
analogOutputTask.Stream.WriteRegenerationMode = WriteRegenerationMode.AllowRegeneration;
//
// verify task
//
analogOutputTask.Control(TaskAction.Verify);
return analogOutputTask;
}
/// <summary>
/// Get Continuous Analog Output Task
/// </summary>
/// <param name="settings"></param>
/// <returns></returns>
private Task GetContinuousAOTask(IVSettings settings)
{
//
// get the properties required for the output task
//
ContinuousAOTaskProperties outputProperties = new ContinuousAOTaskProperties(null, settings.IVGeneralSettings.OutputUpdateRate,
settings.IVGeneralSettings.SamplesPerCycle,
settings.IVGeneralSettings.VoltageAmplitude);
//
// return the output task
//
return m_daqController.CreateContinuousAOTask(outputProperties);
}
