/// <summary>
/// Factory
/// </summary>
public static MockEcuStream CreateInstance()
{
MockEcuStream instance = new MockEcuStream();
lastInstance = instance;
return(instance);
}
/// <summary>
/// Open a port, open an OpenPort, or create a mock ECU stream.
/// </summary>
/// <param name="portName">COM port name, passthru DLL name, or "Mock ECU".</param>
/// <param name="baudRate">Baud rate to use for COM port.</param>
/// <returns>Stream.</returns>
public static Stream GetDataStream(
string portName,
int baudRate,
ref SerialPort port,
TraceLine traceLine)
{
if (portName == SsmUtility.MockEcuDisplayName)
{
MockEcuStream.Image = new EcuImage2F12785206();
return(MockEcuStream.CreateInstance());
}
if (SsmUtility.OpenPort20DisplayName.Equals(portName, StringComparison.OrdinalIgnoreCase))
{
portName = SsmUtility.OpenPort20PortName;
}
if (portName.EndsWith(".dll", StringComparison.OrdinalIgnoreCase))
{
PassThruStream passThruStream = PassThruStream.GetInstance(portName);
passThruStream.OpenSsmChannel();
return(passThruStream);
}
Stream stream = null;
if (port == null)
{
traceLine("SsmUtility.GetDataStream: Creating port.");
port = new SerialPort(portName, baudRate, Parity.None, 8);
port.ReadTimeout = 500;
port.WriteTimeout = 500;
}
if (port.IsOpen)
{
traceLine("SsmUtility.GetDataStream: Port already open, draining input queue...");
int bytesToRead = 0;
while ((bytesToRead = port.BytesToRead) > 0)
{
Trace.WriteLine("SsmUtility.GetDataStream: " + bytesToRead.ToString(CultureInfo.InvariantCulture) + " bytes in queue, reading...");
byte[] buffer = new byte[bytesToRead];
port.Read(buffer, 0, buffer.Length);
traceLine("SsmUtility.GetDataStream: Read completed.");
Thread.Sleep(500);
}
}
else
{
traceLine("SsmUtility.GetDataStream: Port not open.");
bool exists = false;
foreach (string name in System.IO.Ports.SerialPort.GetPortNames())
{
if (string.Compare(name, port.PortName, StringComparison.OrdinalIgnoreCase) == 0)
{
traceLine("SsmUtility.GetDataStream: Port " + name + " exists.");
exists = true;
break;
}
}
if (exists)
{
port.Open();
Trace.WriteLine("SsmUtility.GetDataStream: Port opened.");
}
else
{
string message = "Port " + port.PortName + " does not exist.";
throw new IOException(message);
}
}
stream = port.BaseStream;
Trace.WriteLine("SsmUtility.GetDataStream: Input queue drained, returning stream.");
return(stream);
}
/// <summary>
/// Write a request to the mock ECU
/// </summary>
public override void Write(byte[] buffer, int offset, int count)
{
if (buffer[0] != 0x80)
{
throw new InvalidOperationException("First byte sent to ECU must be 0x80 (command start byte)");
}
/*
* if (buffer[1] != 0x10)
* {
* throw new InvalidOperationException("Second byte sent to ECU must be 0x10 (destination = ECU)");
* }
*
* if (buffer[2] != 0xF0)
* {
* throw new InvalidOperationException("Third byte sent to ECU must be 0xF0 (source = diagnostic tool)");
* }
*/
if (MockEcuStream.GetPacketLength(buffer) != buffer.Length - 5)
{
throw new InvalidOperationException("Fourth byte sent to ECU must be equal to \"buffer_length - 5\"");
}
if (this.corruptNextResponse)
{
byte[] data = new byte[100];
for (int i = 0; i < data.Length; i++)
{
data[i] = (byte)0x55;
}
this.SetResponse(data);
this.corruptNextResponse = false;
return;
}
SsmPacket packet = SsmPacket.ParseRequest(buffer, offset, count);
switch (packet.Command)
{
case SsmCommand.ReadBlockRequest:
this.ReadBlock(packet.BlockStart, packet.BlockLength);
break;
case SsmCommand.ReadAddressesRequest:
this.ReadAddresses(packet.Addresses);
break;
case SsmCommand.WriteBlockRequest:
//this.WriteBlock(packet.BlockStart, packet.BlockData);
break;
case SsmCommand.WriteAddressesRequest:
//this.WriteAddresses(packet.Addresses, packet.Values);
break;
case SsmCommand.EcuInitRequest:
this.Handshake();
break;
}
List <byte> temporaryBuffer = new List <byte>(packet.Data.Length + this.response.Length);
temporaryBuffer.AddRange(packet.Data);
temporaryBuffer.AddRange(this.response);
this.SetResponse(temporaryBuffer.ToArray());
}