private static void Main(string[] args)
{
Initialize();
Start();
Output.Report(StandartMessages.AppStarted());
//Console.WriteLine(Environment.NewLine + "Press ESC to Exit" + Environment.NewLine);
//while (!(Console.KeyAvailable && Console.ReadKey(true).Key == ConsoleKey.Escape))
while (true)
{
try
{
if (Messenger.MessageCount > 0)
{
string message = Messenger.Dequeue();
Output.Report(message);
}
}
finally
{
Thread.Sleep(250);
}
}
//Stop();
//Output.Report(StandartMessages.AppClosed());
}
private static void Respond(SerialPort serialPort, Telegram telegram, ref byte[] lastResponse)
{
if (telegram.response != null && telegram.responseLength > 0)
{
lastResponse = telegram.response;
Respond(serialPort, telegram.response);
Messenger.Enqueue(StandartMessages.RespondingToMaster(serialPort, telegram));
}
else
{
Messenger.Enqueue(StandartMessages.NoResponse(serialPort, telegram));
}
}
/// <summary>
/// Gets the response message from the buffer and clears the buffer
/// </summary>
/// <param name="masterLength"></param>
/// <param name="slaveLength"></param>
/// <returns></returns>
private static ResponseResult GetResponseMessage(SerialPortPlus serialPort, Telegram telegram, out byte[] result)
{
if (telegram.responseLength == 0)
{
Messenger.Enqueue(StandartMessages.TelegramSkiped(telegram));
result = null;
return(ResponseResult.Skiped);
}
//If the telegrams dictionary is filled, ask for it instead
byte[] request = telegram.dictionary.Length > 1 ? telegram.dictionary : telegram.request;
List <byte> buffer = GetRawResponse(serialPort, request);
//If the first byte in the buffer is not 68 or E5, add 68 in front
//if (!((buffer[0] == HexToByte("68")[0]) || (buffer[0] == HexToByte("E5")[0]))) buffer.Insert(0, HexToByte("68")[0]);
if (buffer.Count == telegram.responseLength) //correct response
{
result = buffer.ToArray();
//Check checksum
if (Checksum.Check(result))
{
//If the checksum is correct, proceed
Messenger.Enqueue(StandartMessages.SlaveResponded(serialPort, result, request));
return(ResponseResult.Correct);
}
else
{
//Return bad checksum
Messenger.Enqueue(StandartMessages.BadChecksum(serialPort, telegram, buffer));
return(ResponseResult.Checksum_Error);
}
}
else if (buffer.Count == 0) //no response
{
Messenger.Enqueue(StandartMessages.RequestTimeout(serialPort, telegram));
result = null;
return(ResponseResult.Timeout);
}
else //unexpected response
{
Messenger.Enqueue(StandartMessages.UnexpectedResponse(serialPort, telegram, buffer));
result = buffer.ToArray();
return(ResponseResult.Incorrect);
}
}
private static void Initialize()
{
mySetting = new DataSet();
telegrams = new List <Telegram>();
try
{
//Read and save the settings
mySetting.ReadXml($"{AppDomain.CurrentDomain.BaseDirectory}Settings.xml");
//Initializa the ports
InitializePorts();
//Get General setting
GetGeneralSettings();
//Set database settings
SetDBManager();
Output.ConsoleTimeStamp = true;
//Fill the telegrams table
if (mySetting.Tables["tblTelegrams"] != null)
{
FillTelegramsList();
}
else
{
Messenger.Enqueue(StandartMessages.MissingTable("tblTelegrams"));
}
}
catch (Exception ex)
{
Messenger.Enqueue(ex.Message);
}
}
private static void SlaveThread(SerialPortPlus serialPort)
{
List <byte> serialBuffer = new List <byte>();
byte[] lastResponse = new byte[0];
//Try to open the port
OpenPort(serialPort);
//If the port didnt open return
if (!serialPort.IsOpen)
{
return;
}
//clear the buffer
serialPort.DiscardInBuffer();
//Messenger.Enqueue($"{Thread.CurrentThread.Name} status: {Thread.CurrentThread.IsAlive.ToString()}");
while (MainThread.IsAlive)
{
try
{
int bytesToRead = serialPort.BytesToRead;
//Wait for a full telegram
if (serialPort.BytesToRead > 0)
{
Thread.Sleep(100);
if (serialPort.BytesToRead > bytesToRead)
{
continue;
}
else
{
bytesToRead = serialPort.BytesToRead;
}
}
else
{
Thread.Sleep(250);
continue;
}
//Read and save everything from the buffer
byte[] receivedBytes = new byte[bytesToRead];
//Console.WriteLine($"Bytes to read: {receivedBytes.Length}");
serialPort.Read(receivedBytes, 0, bytesToRead);
//If the received message is just an echo, ignore it
if (echoCancellation && IsEcho(lastResponse, receivedBytes))
{
Messenger.Enqueue(StandartMessages.EchoIgnored(serialPort, receivedBytes));
continue;
}
//Save the read bytes into the buffer
serialBuffer.InsertRange(serialBuffer.Count, receivedBytes);
//If there are known telegrams to listen for, do so
if (telegrams.Count > 0)
{
//For each telegram in the list
for (int i = 0; i < telegrams.Count; i++)
{
Telegram telegram = telegrams[i];
//If a telegram is recognized
if (FindInBuffer(telegram.request, serialBuffer))
{
Respond(serialPort, telegram, ref lastResponse);
//If the telegram is of the default type clear the buffer,
//else keep the bytes and wait for next telegram
if (telegram.teleType != TeleType.Complex)
{
serialBuffer.Clear();
}
break;
}
else if (i >= telegrams.Count - 1)
{
//Check if any of the master ports have TransferCommand enabled
SerialPortPlus sp;
if ((sp = GetPlcPort()) != null)
{
lock (sp)
{
Messenger.Enqueue(StandartMessages.UnrecognizedTelegram(serialPort, serialBuffer) + $"...sending to {sp.PortName}");
//Send the bytes to the port and get response
List <byte> response = GetRawResponse(sp, serialBuffer.ToArray());
byte[] arrResponse = response.ToArray();
Messenger.Enqueue($"[{sp.PortName}]response is: [{Convertor.ByteToHex(arrResponse)}], transfering response to master...");
//Send the responce back to the port that requested it
Respond(serialPort, arrResponse);
lastResponse = arrResponse;
serialBuffer.Clear();
}
}
else
{
Messenger.Enqueue(StandartMessages.UnrecognizedTelegram(serialPort, serialBuffer));
serialBuffer.Clear();
}
}
}
}
else //Sniff the port
{
Messenger.Enqueue(StandartMessages.CurrentBytes(serialPort, serialBuffer));
serialBuffer.Clear();
}
//Check connection
if (!serialPort.IsOpen)
{
Reconnect(serialPort);
}
//Sleep between readings
Thread.Sleep(250);
}
catch (Exception ex)
{
Messenger.Enqueue(ex.Message);
serialBuffer.Clear();
serialPort.DiscardInBuffer();
Thread.Sleep(250);
}
}
serialPort.Close();
}
