private void OnTimedEvent(object source, ElapsedEventArgs args)
{
if (m_GotDataFinished)
{
HandleTimer();
return;
}
// we use the timer to update our data.
TimeSpan elapsedTime = DateTime.UtcNow - m_AcquisitionOnTime;
if (elapsedTime.TotalMilliseconds > m_DataPointSetInterval.TotalMilliseconds * (m_PacketIndex + 1))
{
Int32 numberOfSpectraToGenerate = Convert.ToInt32((elapsedTime.TotalMilliseconds - m_DataPointSetInterval.TotalMilliseconds * (m_DataIndex + 1)) / m_DataPointSetInterval.TotalMilliseconds);
for (int indexSpectrum = 0; indexSpectrum < numberOfSpectraToGenerate; indexSpectrum++)
{
// in minutes
double dCurrentTime = m_AcquisitionOnRetention + (double)m_DataIndex / m_RateProperty.Value.Value / 60.0;
m_ChannelTimeProperty.Update(dCurrentTime);
int signal = ChannelTestDriver.CurrentDataValue(dCurrentTime);
for (int indexDataPoint = 0; indexDataPoint < m_MyCmDevice.MaximumNumberOfDataPoints; indexDataPoint++)
{
m_Spectrum[indexDataPoint] = signal;
}
m_DataIndex++;
m_MyCmDevice.UpdateData(false, m_DataIndex, m_Spectrum);
// update the total number of spectra already acquired
m_SpectraIndexProperty.Update(m_DataIndex);
}
m_PacketIndex++;
}
HandleTimer();
}
private void OnTimedEvent(object source, ElapsedEventArgs args)
{
if (m_GotDataFinished)
{
HandleTimer();
return;
}
// we use the timer to update our data.
TimeSpan elapsedTime = DateTime.UtcNow - m_AcquisitionOnTime;
if (elapsedTime.TotalMilliseconds > m_DataPointInterval.TotalMilliseconds * (m_PacketIndex + 1))
{
// create as many data points as necessary
Int32 numberOfDataPointsToGenerate = Convert.ToInt32((elapsedTime.TotalMilliseconds - m_DataPointInterval.TotalMilliseconds * (m_DataIndex + 1)) / m_DataPointInterval.TotalMilliseconds);
m_DataPacket = new int[numberOfDataPointsToGenerate];
for (int i = 0; i < numberOfDataPointsToGenerate; i++)
{
// in minutes
double dCurrentTime = m_AcquisitionOnRetention + (double)m_DataIndex / m_RateProperty.Value.Value / 60.0;
m_ChannelTimeProperty.Update(dCurrentTime);
m_DataPacket[i] = ChannelTestDriver.CurrentDataValue(dCurrentTime);
m_DataIndex++;
}
// update the total number of data points already acquired
m_DataIndexProperty.Update(m_DataIndex);
m_PacketIndex++;
m_MyCmDevice.UpdateData(0, m_DataPacket);
}
HandleTimer();
}
/// <summary>
/// Create our Dionex.Chromeleon.Symbols.IDevice and our Properties and Commands
/// </summary>
/// <param name="cmDDK">The DDK instance</param>
/// <param name="driver">The driver instance</param>
/// <param name="name">The name for our device</param>
/// <returns>our IDevice object</returns>
internal IDevice OnCreate(ChannelTestDriver driver, IDDK cmDDK, string name)
{
m_Driver = driver;
// Create our Dionex.Chromeleon.Symbols.IDevice
m_MyCmDevice = cmDDK.CreateDevice(name, "This is the master device of the ChannelTest driver.");
m_MyCmDevice.ImmediateNotReady = true;
// NOTE:
// Setting 'ImmediateNotReady' to true on the main device toggles the 'Ready' property for 5s(default) to false when entering TransferPreflightToRun, unless one updates the ready property explicitly.
// Therefore it's also necessary to create a standard property 'Ready' which can be toggled and which can be added to instrument methods in a Wait statement.
// More background:
// In common LC/GC environments an injector is used in the instrument configuration and it's Inject command in the method would cause a natural delay.
// In our example driver we have no delay like this and can run into a kind of data exchange delay issue.
// Setting the parameter FixedRate in a method updates also the channel parameters TimeStepFactorProperty and TimeStepDevisorProperty.
// If setting the parameter FixedRate is immediately followed by an AcqOn command, the 'Real Time Kernel' might not be updated via interprocess communication soon enough and
// calculates the number of expected datapoints with old settings of TimeStepFactorProperty and TimeStepDevisorProperty. This might stop the data acquisition by 'OnDataFinished' when faulty 'enough' data points have been dumped.
// To avoid this in this example, following to steps in combination are necessary:
// 1) introducing a standard property 'Ready' which can be checked in the instrument method.
// 2) Set ChannelTest.ImmediateNotReady to true
// 3) Adding a Wait ChannelTest.Ready in the method before AcqOn.
// This provides enough time when setting FixedRate in our example to update the 'Real Time Kernel's TimeStepFactorProperty and TimeStepDevisorProperty.
// Create a command for the hardware error simulation.
m_HardwareErrorCommand =
m_MyCmDevice.CreateCommand("HardwareError", "This command simulates a hardware error.");
m_HardwareErrorCommand.OnCommand += new CommandEventHandler(m_HardwareErrorCommand_OnCommand);
//Create ready property
ITypeInt tReady = cmDDK.CreateInt(0, 1);
//Add named values
tReady.AddNamedValue("NotReady", 0);
tReady.AddNamedValue("Ready", 1);
ReadyProperty = m_MyCmDevice.CreateStandardProperty(StandardPropertyID.Ready, tReady);
ReadyProperty.Update(1);
return(m_MyCmDevice);
}
