/// <summary>
/// This function sends out a FDXDatagram
/// </summary>
/// <param name="datagram">the datagram that is to be send</param>
/// <returns></returns>
public int Send(ref FDXDatagram datagram)
{
//Set the current valid sequence number
datagram.SetSequenceNumber(this.mNextTransmitSequenceNumber);
// convert the datagram object to a byte array
var outData = datagram.GenerateBuffer();
var res = this.mSocket.Send(outData, outData.Length);
// Increment the sequence number for the next datagram
this.mNextTransmitSequenceNumber = FDXDatagram.IncrementSequenceNumber(this.mNextTransmitSequenceNumber);
return(res);
}
/// <summary>
/// This function receives a datagram on the socket
/// </summary>
/// <param name="datagram">Reference to a datagram to store the information</param>
/// <returns>size of the received datagram, -1 if no data is received</returns>
public int Receive(ref FDXDatagram datagram)
{
// Get the IPEndpoint
var ep = new System.Net.IPEndPoint(this.mCanoeAddr, this.mPort);
try
{
if (this.mSocket.Available > 0)
{
datagram.Buffer = this.mSocket.Receive(ref ep);
}
}
catch (System.Net.Sockets.SocketException)
{
Console.Out.WriteLine("No answer from CANoe Client");
return(-1);
}
return(datagram.Buffer.Length);
}
public void DispatchDatagram(ref FDXDatagram datagram)
{
var lCopy = datagram.Buffer;
//if the received bytes are too short, skip
if (lCopy.Length < 16)
{
this.OnFormatError("Datagram too short");
return;
}
// extract datagram header information
var header = DatagramHeader.DeSerialize(lCopy);
//if the signature doesn't match, skip
if (header.FDXSignature != FDXHelper.kFDXSignature)
{
this.OnFormatError("Signature mismatch");
return;
}
//if the major version doesn't match, skip
if (header.FDXMajorVersion != FDXHelper.kFDXMajorVersion)
{
this.OnFormatError("Incorrect Major version");
return;
}
//if the minor version doesn't match, skip
if (header.FDXMinorVersion != FDXHelper.kFDXMinorVersion)
{
this.OnFormatError("Incorrect Minor Version");
return;
}
//checking the sequence number
if (header.SequenceNumber == FDXHelperSequenceNumber.kSequenceNumberUnused)
{
//we don't use sequence numbering
}
else
{
// check if the received sequence number is the expected
if ((header.SequenceNumber & 0x7FFF) != this.mNextExpectedSequenceNumber)
{
this.OnSequenceError(this.mNextExpectedSequenceNumber, header.SequenceNumber);
}
// if the session end sequence number arrives, reset the expected sequence number
else if ((header.SequenceNumber & FDXHelperSequenceNumber.kSequenceNumberSessionEndFlag) != 0)
{
this.mNextExpectedSequenceNumber = FDXHelperSequenceNumber.kSequenceNumberStart;
}
else
{
// if expected sequence number matches the received sequence number
this.mNextExpectedSequenceNumber = FDXDatagram.IncrementSequenceNumber(header.SequenceNumber);
}
}
//extract the number of commands and set the position
var numOfCommands = header.NumberOfCommands;
var commandPosAndLength = DatagramHeader.Size();
//create a buffer for the single commands
var data = new byte[lCopy.Length - commandPosAndLength];
for (var i = 0; i < numOfCommands; ++i)
{
//copy command number i into the buffer
Array.Copy(lCopy, commandPosAndLength, data, 0, lCopy.Length - commandPosAndLength);
//extract the header information and copy the data from the buffer into the concrete command
// buffer
var cmdHead = CommandHeader.DeSerialize(data);
var concreteCommand = new byte[cmdHead.CommandSize];
Array.Copy(data, 0, concreteCommand, 0, concreteCommand.Length);
commandPosAndLength += concreteCommand.Length;
// with the command code we can decide what to do with the received command
switch (cmdHead.CommandCode)
{
case FDXHelperCommandCode.kCommandCodeDataExchange:
{
var cmd = DataExchangeCommand.DeSerialize(concreteCommand);
this.OnDataExchange(cmd);
break;
}
case FDXHelperCommandCode.kCommandCodeStatus:
{
var cmd = StatusCommand.DeSerialize(concreteCommand);
this.OnStatus(cmd);
break;
}
case FDXHelperCommandCode.kCommandCodeSequenceNumberError:
{
var com = SequenceNumberErrorCommand.DeSerialize(concreteCommand);
this.OnSequenceError(com.ExpectedSeqNr, com.ReceivedSeqNr);
break;
}
}
}
}
static void Main(string[] args)
{
//Register delegate to catch CTRL-C on the console
Console.CancelKeyPress += delegate(object sender, ConsoleCancelEventArgs e)
{
e.Cancel = true;
sKeepRunning = false;
};
Console.Out.WriteLine("The FDX-Client can be terminated with CTRL-C");
var addr = String.Empty;
ushort port = 0;
sbyte cProbCapModifier = 1;
var isFuelConsumingActive = false;
//setup connection parameters when specified
if (args.Length == 2)
{
addr = args[0];
port = ushort.Parse(args[1]);
}
//Create socket, diagram and Dispatcher
var fdxSocket = new FDXSocket();
var fdxDatagram = new FDXDatagram();
var disp = new A429DataDispatcher();
//Create data packet and initialize with data
var data = new A429InputData
{
FuelTempAndAdvisoryWarning = -2048,
ProbeCapacitance = 0
};
var ovhdData = new A429OvhdData();
//Set the new connection settings only when specified
if (addr != string.Empty)
{
fdxSocket.SetCANoeAddr(addr, port);
}
fdxSocket.Open();
//Initialize datagram and set start command
fdxDatagram.InitWithHeader();
fdxDatagram.AddStartCommand();
//Send start command to CANoe
fdxSocket.Send(ref fdxDatagram);
// wait one second for initializing CANoe
Thread.Sleep(1000);
while (sKeepRunning)
{
fdxDatagram.InitWithHeader();
//Update values only when measurement is running
if (FDXHelperMeasurementState.CurrentMeasurementState == FDXHelperMeasurementState.kMeasurementStateRunning)
{
if (data.FuelTempAndAdvisoryWarning < 2048)
{
data.FuelTempAndAdvisoryWarning += 4;
}
else
{
data.FuelTempAndAdvisoryWarning = -2048;
}
if (cProbCapModifier == 1 && data.ProbeCapacitance > 399)
{
cProbCapModifier = -1;
}
else if (cProbCapModifier == -1 && data.ProbeCapacitance < 1)
{
cProbCapModifier = 1;
}
else
{
// activate fuel consumption when probe capacitance is over 100
if (isFuelConsumingActive == false && data.ProbeCapacitance > 10)
{
ovhdData.SysMainEng1 = 1;
ovhdData.SysMainEng2 = 1;
ovhdData.SysMainEng3 = 1;
ovhdData.SysMainEng4 = 1;
ovhdData.SysTTankL = 1;
ovhdData.SysTTankR = 1;
fdxDatagram.AddDataExchange(A429OvhdData.sGroupId, ovhdData.Serialize());
isFuelConsumingActive = true;
}
// deactivate fuel consumption when probe capacitance is under 100
else if (isFuelConsumingActive && data.ProbeCapacitance <= 10)
{
ovhdData.SysMainEng1 = 0;
ovhdData.SysMainEng2 = 0;
ovhdData.SysMainEng3 = 0;
ovhdData.SysMainEng4 = 0;
ovhdData.SysTTankL = 0;
ovhdData.SysTTankR = 0;
fdxDatagram.AddDataExchange(A429OvhdData.sGroupId, ovhdData.Serialize());
isFuelConsumingActive = false;
}
data.ProbeCapacitance += (0.4f * cProbCapModifier);
}
fdxDatagram.AddDataExchange(A429InputData.sGroupId, data.Serialize());
fdxDatagram.AddDataRequest(A429OutputData.sGroupId);
}
//poll status whether measurement is not running
fdxDatagram.AddStatusRequest();
fdxSocket.Send(ref fdxDatagram);
//receive and dispatch datagram
if (fdxSocket.Receive(ref fdxDatagram) > -1)
{
disp.DispatchDatagram(ref fdxDatagram);
}
// sleep 250ms for next interval
Thread.Sleep(250);
}
//Wait one second before shutting down CANoe
Thread.Sleep(1000);
//Init and send stop command
fdxDatagram.InitWithHeader();
fdxDatagram.AddStopCommand();
fdxSocket.Send(ref fdxDatagram);
}