public Task Handle(ConnectionUpdatedEvent notification, CancellationToken cancellationToken)
{
_connectionRepository.ClearCache();
_routeRepository.ClearCache();
return(Task.CompletedTask);
}
// connects to a specific COM port
public void Connect(byte portNumber, bool rtsDtrEnable, int attempts)
{
if (attempts > 0)
{
Disconnect();
port.PortNumber = portNumber;
if (rtsDtrEnable)
{
port.DtrControl = DTR_CONTROL.ENABLE;
port.RtsControl = RTS_CONTROL.ENABLE;
//port.DtrControl = true;
//port.RtsControl = true;
}
else
{
port.DtrControl = DTR_CONTROL.DISABLE;
port.RtsControl = RTS_CONTROL.DISABLE;
//port.DtrControl = false;
//port.RtsControl = false;
}
port.Open();
while (port.IsOpen == false)
{
} // wait for port to open
Thread.Sleep(300); // give time to Arduinos that reset upon port opening
port.Flush();
if (identify())
{
queryCapabilities();
queryErrorMessages();
activePortName = port.PortName;
ConnectionUpdatedEvent?.Invoke(); // raise connection updated event
dataToWrite.Clear();
comLoop.RunWorkerAsync();
}
else
{
port.Close();
while (port.IsOpen)
{
} // wait for port to close
Connect(portNumber, rtsDtrEnable, attempts - 1); // recursively call this function with one less attempt to try
}
}
else
{
throw new System.IO.IOException("Wrong device");
}
}
// connects to a specific COM port
public /*async*/ void Connect(byte portNumber, bool rtsDtrEnable)
{
if (port.IsOpen) // terminates any previous connection
{
Disconnect();
}
port.PortNumber = portNumber;
if (rtsDtrEnable)
{
port.DtrControl = DTR_CONTROL.ENABLE;
port.RtsControl = RTS_CONTROL.ENABLE;
}
else
{
port.DtrControl = DTR_CONTROL.DISABLE;
port.RtsControl = RTS_CONTROL.DISABLE;
}
port.Open();
while (port.IsOpen == false)
{
} // wait for port to open
Thread.Sleep(300); // give time to Arduinos that reset upon port opening
port.ReadExisting();
bool identified = false;
for (int i = 0; i < 3; i++)
{
if (identify())
{
identified = true;
break;
}
}
if (identified) // three attempts
{
activePortName = port.PortName;
ConnectionUpdatedEvent?.Invoke(); // raise connection updated event
this.comLoop.RunWorkerAsync();
}
else
{
port.Close();
while (port.IsOpen)
{
} // wait for port to close
throw new System.IO.IOException("Wrong device");
}
}
// disconnect from a COM port
public void Disconnect()
{
if (port.IsOpen)
{
try
{
comLoop.CancelAsync(); // stops monitoring for new data
port.Close();
while (port.IsOpen)
{
} // wait for port to close
}
catch (System.IO.IOException ex)
{
System.Windows.MessageBox.Show(ex.Message, "Error", System.Windows.MessageBoxButton.OK, System.Windows.MessageBoxImage.Error);
}
}
// resets all read data
current = 0;
voltage = 0;
temperature = 0;
status = 0;
UserPins = 0;
errorFlags = 0;
seriesResistance = 0;
// resets all port and device information
activePortName = null;
firmwareVersion = null;
boardRevision = null;
DeviceIdentification = string.Empty;
maxIdac = 0;
maxIadc = 0;
maxVdac = 0;
maxVadc = 0;
maxPower = 0;
dvmInputResistance = 0;
temperatureThreshold = 0;
errorMessages = null;
dataToWrite.Clear();
// raise connection updated event
ConnectionUpdatedEvent?.Invoke();
// last data update (with reset data)
DataUpdatedEvent?.Invoke(); // event for data update complete
}
