/// <summary>
/// Create calibration task
/// </summary>
/// <param name="properties">The properties relevant for the task</param>
/// <returns>The task to be activated</returns>
public Task CreateCalibrationTask(TaskProperties properties)
{
Task analogInputTask = new Task();
analogInputTask.AIChannels.CreateVoltageChannel(Settings.Default.DAQPhysicalChannelName0, string.Empty,
GetAITerminalConfiguration(),
-10, 0, AIVoltageUnits.Volts);
analogInputTask.Timing.ConfigureSampleClock(string.Empty, properties.SampleRate,
SampleClockActiveEdge.Rising,
SampleQuantityMode.ContinuousSamples,
properties.SamplesPerChannel);
analogInputTask.Timing.SampleTimingType = SampleTimingType.SampleClock;
return analogInputTask;
}
/// <summary>
/// Get continuous analog-in task (calibration task)
/// </summary>
/// <param name="settings"></param>
/// <param name="worker"></param>
/// <param name="e"></param>
/// <returns></returns>
private Task GetCalibrationTask(CalibrationSettings settings, string taskName,BackgroundWorker worker, DoWorkEventArgs e)
{
//
// Create the task with its propertites
//
TaskProperties taskProperties = new TaskProperties(settings.CalibirationSettings.SampleRate,
settings.ChannelsSettings.ActiveChannels, taskName);
return m_daqController.CreateContinuousAITask(taskProperties);
}
/// <summary>
/// Creates a continuous read task.
/// </summary>
/// <param name="properties"></param>
/// <returns></returns>
public Task CreateContinuousAITask(TaskProperties properties)
{
//
// Create anaglog input task with the specified name
//
Task analogInputTask = new Task(c_refContAITask);
//
// Construct the the physical channel name according to the desired inputs.
//
StringBuilder physicalChannelName = new StringBuilder();
foreach (var channel in properties.ActiveChannels)
{
physicalChannelName.Append(channel.PhysicalName);
physicalChannelName.Append(",");
}
//
// Remove last ':' from channel name
//
physicalChannelName.Remove(physicalChannelName.Length - 1, 1);
//
// Define a voltage channel
//
AIChannel anaglogChannel = analogInputTask.AIChannels.CreateVoltageChannel(physicalChannelName.ToString(), string.Empty,
GetAITerminalConfiguration(),
-10, 10, AIVoltageUnits.Volts);
//
// Configure sampling timing. the buffer size is large enough for 10 minutes reading
//
analogInputTask.Timing.ConfigureSampleClock(string.Empty, properties.SampleRate, SampleClockActiveEdge.Rising,
SampleQuantityMode.ContinuousSamples, (int)properties.SampleRate * 600);
//
// Verify the task
//
analogInputTask.Control(TaskAction.Verify);
//
// read the data from the buffer from the last read point.
//
analogInputTask.Stream.ReadRelativeTo = ReadRelativeTo.CurrentReadPosition;
analogInputTask.Stream.ReadOffset = 0;
//
// no time limitation for the reading process
//
analogInputTask.Stream.Timeout = -1;
return analogInputTask;
}
/// <summary>
/// Get Continuous Analog Input Task
/// </summary>
/// <param name="settings"></param>
/// <returns></returns>
private Task GetContinuousAITask(int sampleRate, IList<IDataChannel> activeChannels, string taskName)
{
//
// get the properties required for the input task
//
TaskProperties inputTaskProperties = new TaskProperties(sampleRate, activeChannels, taskName);
//
// return the input task
//
return m_daqController.CreateContinuousAITask(inputTaskProperties);
}