public DecompressieKamer(int maxTries = 3)
{
AreValuesUpToDate = false;
_SerialPort = new SerialPort();
//RP6 default config 38400,8N1
_SerialPort.BaudRate = 38400;
_SerialPort.DataBits = 8;
_SerialPort.Parity = Parity.None;
_SerialPort.StopBits = StopBits.One;
if (!SearchForDecompressionDevice(maxTries))
{
_SerialPort.Dispose();
throw new NoDeviceFoundException();
}
_Message = new Message(_SerialPort);
_LastTimeAlive = DateTime.Now;
_LastUpdateTime = DateTime.Now;
}
/// <summary>
/// Automatically check existing devices and see if they are a decompression chamber by trial and error
/// </summary>
/// <param name="maxTries"></param>
/// <returns>true if found false if not</returns>
private bool SearchForDecompressionDevice(int maxTries)
{
if (_SerialPort == null)
{
return false;
}
bool found = false;
int tries = 0;
Thread.Sleep(1000);
while (!found && tries < maxTries)
{
foreach (string port in SerialPort.GetPortNames())
{
if (_SerialPort.IsOpen)
{
try
{
_SerialPort.Close();
}
catch (Exception) { /*We just want to disconnect and continue searching*/ }
}
try
{
_SerialPort.PortName = port;
_SerialPort.Open();
Message message = new Message(_SerialPort);
message.BeginWrite();
message.Action = (byte)Actions.CHECK_FOR_DECOMPRESSION_DEVICE;
message.Write_byte((byte)MsgStruct.MS_DataBegin);
message.Send();
Stopwatch watch = new Stopwatch();
watch.Start();
while (message.Receive() != 6 && watch.ElapsedMilliseconds < 150) { }
if (message.DataLength == 1 && !message.IsCorrupt)
{
byte output = 0;
if (message.Action == (byte)Actions.HERE_IS_A_DECOMPRESSION_DEVICE && message.Read_byte(ref output))
{
if (output == (byte)MsgStruct.MS_DataEnd)
{
//found decompression device
return true;
}
}
}
}
catch (Exception)
{
continue;
}
}
++tries;
Thread.Sleep(1);
}
return false;
}
