/// <summary>
/// Bubble up power meter errors
/// </summary>
private void Meter_OnPowerMeterError(NewportMeter <BaseSerialPort> PowerMeter, string ErrorMessage, int ErrorCode)
{
if (ErrorHandler != null)
{
ErrorHandler.Invoke(this, ErrorMessage, ErrorCode);
}
}
/// <summary>
/// Open a connection to the power meter and start taking readings.
/// </summary>
/// <param name="COMPort">System COM port to open, must be a valid system serial port</param>
public async void StartReadingAsync(String COMPort = null)
{
StopReading();
if (String.IsNullOrEmpty(COMPort))
{
MeterUnableToConnect?.Invoke(null);
}
else
{
// Wait a bit to let connection settle
System.Threading.Thread.Sleep(250);
try
{
Meter = await System.Threading.Tasks.Task.Run(() =>
{
Meter = new NewportMeter <BaseSerialPort>(COMPort);
Meter.OnPowerMeterError += Meter_OnPowerMeterError;
MeterConnecting?.Invoke(Meter);
StartBackgroundReadingThread();
return(Meter);
});
}
catch (System.UnauthorizedAccessException e)
{
MeterUnableToConnect?.Invoke(e.Message);
}
}
}
/// <summary>
/// Check a COM port for the presence of a power meter.
/// </summary>
/// <param name="ComPort">COM port name to check</param>
/// <param name="FailedToOpen">On return, this is TRUE if the COM port failed to open (i.e., if another process had it open), FALSE if COM port opened but doesn't appear to be a power meter</param>
/// <returns>TRUE if an appropriate meter was found on the COM port specified, FALSE otherwise (FALSE if another process has COM port open)</returns>
public static Boolean CheckForMeter(String ComPort, out Boolean FailedToOpen)
{
FailedToOpen = true;
try
{
if (!String.IsNullOrEmpty(ComPort))
{
using (NewportMeter <Port> Newport = new NewportMeter <Port>(ComPort))
{
FailedToOpen = false;
Newport.SendCommand("", true);
Newport.GetDeviceID();
if (Newport.Make.Equals("NEWPORT"))
{
return(true);
}
}
}
}
catch
{
// An exception probably means somebody else has this COM port open, or it is not a
// power meter. In either case, we can't use it.
}
finally
{
}
return(false);
}
/// <summary>
/// Stop taking readings from any connected power meter. The Reading property will still contain the
/// last reading from the meter.
/// </summary>
public void StopReading()
{
if (Meter != null)
{
StopBackgroundReadingThread();
MeterDisconneting?.Invoke(Meter);
Meter.Dispose();
Meter = null;
}
}
