/// <summary>
/// Initialize and connect the disigtal system.
/// </summary>
public override bool Connect()
{
Logger.LogDebug(this, "[CLASS].Connect()");
try
{
LenzBufferManager.Clear();
this.SerialPort = new SerialPort(this.PortName, this.BaudRate, Parity.None, 8, StopBits.One);
//this.SerialPort.Parity = Parity.None;
this.SerialPort.Handshake = Handshake.None;
//this.SerialPort.DataBits = 8;
//this.SerialPort.StopBits = StopBits.One;
this.SerialPort.RtsEnable = false;
this.SerialPort.DtrEnable = false;
this.SerialPort.WriteTimeout = this.ReadWriteTimeout;
this.SerialPort.ReadTimeout = this.ReadWriteTimeout;
this.SerialPort.ReadBufferSize = 1024;
if (this.SerialPort != null && !this.SerialPort.IsOpen)
{
this.SerialPort.DataReceived += SerialPort_DataReceived;
this.SerialPort.Open();
// Send information
this.OnInformationReceived(new SystemConsoleEventArgs(SystemConsoleEventArgs.MessageType.Information, "{0} connected", this.Name));
// Send a system & interface information request to verify communication and to show system info as well
this.SystemInformation();
Thread.Sleep(250);
this.InterfaceInformation();
// Start the acknowledgement signal timer
if (this.KeepaliveSignalInterval > 0)
{
this.AcknowledgementTimer = new System.Timers.Timer(this.KeepaliveSignalInterval);
this.AcknowledgementTimer.Elapsed += AcknowledgementTimer_Elapsed;
this.AcknowledgementTimer.Start();
}
this.Status = SystemStatus.Connected;
return(true);
}
else
{
return(false);
}
}
catch (Exception ex)
{
Logger.LogError(this, ex);
this.OnInformationReceived(new SystemConsoleEventArgs(SystemConsoleEventArgs.MessageType.Error, ex.Message));
this.SerialPort.Dispose();
return(false);
}
}
public static List <List <byte> > DataReceived(List <byte> receivedBytes)
{
// Add new bytes to the buffer
LenzBufferManager.RxBuffer.AddRange(receivedBytes);
// Parse command packets
return(LenzBufferManager.GetPackets());
}
private void SerialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
IResponse response;
//SerialPort xpressnetSerialPort = (SerialPort)sender;
if (this.SerialPort.BytesToRead <= 0)
{
return;
}
// this.SerialPort.ReadBufferSize = 1024;
List <byte> rxBytes = new List <byte>();
rxBytes.AddRange(System.Text.Encoding.ASCII.GetBytes(this.SerialPort.ReadExisting()));
if (this.DebugMode)
{
this.OnInformationReceived(new SystemConsoleEventArgs(SystemConsoleEventArgs.MessageType.Debug,
"RX -> {0}",
BinaryUtils.ToString(rxBytes)));
}
foreach (List <byte> command in LenzBufferManager.DataReceived(rxBytes))
{
response = this.GetResponse(command);
if (response != null)
{
this.OnCommandReceived(new SystemCommandEventArgs(response));
}
}
if (this.DebugMode)
{
this.OnInformationReceived(new SystemConsoleEventArgs(SystemConsoleEventArgs.MessageType.Debug,
"BUFFER -> {0}",
BinaryUtils.ToString(LenzBufferManager.RxBuffer)));
}
}
private static List <List <byte> > GetPackets()
{
bool discard = false;
bool reading = false;
int remWindowStart = -1;
int remWindowEnd = -1;
List <byte> currentCommand = null;
List <List <byte> > commands = new List <List <byte> >();
for (int i = 0; i < LenzBufferManager.RxBuffer.Count; i++)
{
// The buffer should always start with a package. If the first bytes of the buffer don't
// correspond to a valid command, discard bytes until a valid command header is detected
if ((i == 0 || i == 1) && LenzBufferManager.RxBuffer[i] != COMMAND_DELIMITER)
{
discard = true;
}
// A command header is detected
if (!reading && i < LenzBufferManager.RxBuffer.Count - 1 && LenzBufferManager.RxBuffer[i] == COMMAND_DELIMITER && LenzBufferManager.RxBuffer[i + 1] == COMMAND_DELIMITER)
{
if (remWindowStart < 0)
{
remWindowStart = i;
}
discard = false;
reading = true;
currentCommand = new List <byte>();
i++;
}
else if (!discard)
{
if (currentCommand != null)
{
currentCommand.Add(LenzBufferManager.RxBuffer[i]);
if (LenzBufferManager.IsValidCommand(currentCommand) || LenzBufferManager.IsInterfaceCommand(currentCommand))
{
remWindowEnd = i;
commands.Add(currentCommand);
discard = true;
reading = false;
}
else if (LenzBufferManager.IsDiscardableResponse(currentCommand))
{
remWindowEnd = i;
discard = true;
reading = false;
}
}
}
}
// Remove readed packets
if (remWindowEnd > 0)
{
LenzBufferManager.RxBuffer.RemoveRange(remWindowStart, remWindowEnd - remWindowStart + 1);
}
return(commands);
}
