private InstrumentNothingEvent DiscoverInstrument()
{
// Create the return event.
InstrumentNothingEvent instrumentNothingEvent = new InstrumentNothingEvent(this);
InstrumentController instrumentController = SwitchService.CreateInstrumentController();
try
{
// Open the serial port connection needed to communicate with the instrument.
instrumentController.Initialize(InstrumentController.Mode.Batch);
// MX4 is the default instrument controller created for MX4 docking stations.
if (instrumentController is MX4)
{
// VPRO instrument controller may need created instead depending on type of docked instrument.
if (instrumentController.GetInstrumentType() == DeviceType.VPRO)
{
// Clean up MX4 controller.
instrumentController.Dispose();
// Create and initialize VPRO controller.
instrumentController = new VPRO();
instrumentController.Initialize(InstrumentController.Mode.Batch);
}
}
// If we make it through InstrumentController.Initialize without throwing, then
// we assume the instrument is now on, or at least it's IrDA is.
InstrumentOff = false;
Stopwatch sw = new Stopwatch();
sw.Start();
// TxRxRetries value is returned by modbuslibrary.dll. It continally increments the value and never resets it back to zero.
// So, before reading data from the instrument, we get the current value. Farther below, when we're finished reading, we get
// the value again, and subtract this starting value to determine how many retries occurred during this particular discovery.
// Getting this starting value also lets us subtract out any of the retries occurring during initializing above.
int startTxRxRetries = instrumentController.Driver.TxRxRetries;
// Retrieve the docked instrument.
instrumentNothingEvent.DockedInstrument = instrumentController.DiscoverDockedInstrument(true);
// INS-8228 RHP v7.6, Service accounts need to perform auto-upgrade on instruments even in error/fail state
Master.Instance.SwitchService.IsInstrumentInSystemAlarm = instrumentController.IsInstrumentInSystemAlarm;
sw.Stop();
int txRxCount = instrumentController.Driver.TxRxCount;
double txRxCountPerSecond = (double)txRxCount / (sw.ElapsedMilliseconds / 1000.0);
int txRxRetries = instrumentController.Driver.TxRxRetries - startTxRxRetries;
Log.Debug(string.Format("Modbus statistics: stopwatch={0}ms, TxRx={1} ({2}/s), retries={3}",
sw.ElapsedMilliseconds, txRxCount, txRxCountPerSecond.ToString("f0"), txRxRetries));
}
catch (InstrumentSystemAlarmException) // SGF Nov-23-2009 DSW-355 (DS2 v7.6)
{
// If the user docked an instrument in system alarm, then just rethrow up to the service
// that invoked this discovery and let it deal with it.
throw;
}
catch (HardwareConfigurationException)
{
// If user failed to reconfigure the docking station hardware, then just rethrow up to the service
// that invoked this discovery and let it deal with it.
throw;
}
catch (Exception e)
{
Log.Error(this.GetType().ToString() + ".Execute.DiscoverDockedInstrument", e);
// ********************************************************************
// See INS-6671 and INS-6682 as to why the second discover was removed.
// ********************************************************************
throw;
} // end-catch
finally
{
instrumentController.Dispose();
}
return(instrumentNothingEvent);
}
