///// <summary>
///// Function to get a file. Make sure you unsuscribe DataReceived events from SerialPort before calling this function!
///// </summary>
///// <param name="FileName">FileName on sender system</param>
///// <param name="timeOutS">Break transfert before after specified number of seconds.</param>
///// <returns>Return a Memory Stream. It's up to you to write it to a file or deserialize it, or whatever...</returns>
public MemoryStream ZModemTransfert(string fileName, int timeOutS)
{
state = TransfertState.Initializing;
//Init of variables to allow multiple download with a simple object.
HeaderInProgress = false;
FrameInProgress = false;
ErrorInHeader = false;
ErrorOfTransmission = false;
NeedAttnSeq = false;
EndOfFrame = false;
ZackRequested = false;
NextByteHeader = false;
SessionInit = false;
SessionClose = false;
ErrorInData = false;
StopThread = false;
Console.WriteLine("");
Console.WriteLine("Start transfert of " + fileName + "...");
receivedBytes = new Queue <byte>();
lockAcces = new object();
if (!t.IsAlive)
{
t = new Thread(new ThreadStart(DataReceived));
}
t.Start();
portserie.DataReceived += new SerialDataReceivedEventHandler(portserie_DataReceived);
msZfile = new MemoryStream();
msfile = new MemoryStream();
sdata = new SessionReceiver();
hdata = new HeaderReceiver();
SendCommand("sz " + fileName);
state = TransfertState.Initialized;
DateTime start = DateTime.Now;
while (!SessionClose)
{
Thread.Sleep(50);
if (timeOutS > 0)
{
if ((DateTime.Now - start).TotalSeconds > timeOutS)
{
Console.WriteLine("Timeout for this operation!");
portserie.DataReceived -= new SerialDataReceivedEventHandler(portserie_DataReceived);
NeedAttnSeq = true;
StopThread = true;
t.Join();
Thread.Sleep(1000);
ThreadRequestSerialPort = true;
lock (lockAcces)
{
portserie.DiscardInBuffer();
SendCommand(SessionAbortSeq);
portserie.DiscardInBuffer();
return(msfile);
}
}
}
}
StopThread = true;
portserie.DataReceived -= new SerialDataReceivedEventHandler(portserie_DataReceived);
GC.Collect();
state = TransfertState.Ended;
return(msfile);
}
void DataReceived()
{
Byte b;
DateTime StartReceiveHeader = DateTime.Now;
//Console.WriteLine("Treatment Thread Starts!");
while (!StopThread)
{
while (receivedBytes.Count > 0)
{
if (StopThread)
{
return;
}
else
{
lock (lockAcces)
{
b = receivedBytes.Dequeue();
}
}
//Console.Write("Buffer:" + portserie.BytesToRead + "\r");
if (FrameInProgress)
{
bdata.ReceivedNewByteInDataFrame(b, ref EndOfFrame, ref ZackRequested, ref ErrorOfTransmission, ref NeedAttnSeq, ref NextByteHeader);
if (ErrorOfTransmission)
{
state = TransfertState.Error;
if (NeedAttnSeq)
{
Console.WriteLine("NeedAttn");
}
Console.WriteLine("CRC error detected, long pause (to make sure that no data remains in buffer), then try to resume");
ThreadRequestSerialPort = true;
Thread.Sleep(0);
portserie.DiscardOutBuffer();
portserie.DiscardInBuffer();
Thread.Sleep(500);
receivedBytes.Clear();
SendCommand(BuildZRPOSFrame((int)msfile.Position));
Thread.Sleep(0);
EndOfFrame = true;
FrameInProgress = false;
NextByteHeader = true;
continue;
}
else if (EndOfFrame)
{
FrameInProgress = false;
//HeaderInProgress = false;
if (hdata.type == HeaderType.ZFILE)
{
receivedBytes.Clear();
//Console.WriteLine("ZFILE FRAME: ");
//Byte[] buf = msZfile.ToArray();
//for (int i = 0; i < buf.Length; i++)
// Console.Write((char)buf[i]);
//Console.WriteLine("");
zfileInfo = new ZFileInfo(hdata, msZfile);
if (FileInfoEvent != null)
{
FileInfoEvent(null, new FileInfoEventArgs(zfileInfo.fileName, zfileInfo.size));
}
SendCommand(BuildZRPOSFrame((int)msfile.Position));
continue;
}
else if (ZackRequested)
{
SendCommand(BuildZACKFrame((int)msfile.Position));
continue;
}
else if (hdata.type == HeaderType.ZDATA)
{
if (zfileInfo.size != msfile.Length)
{
Console.WriteLine("File not fully transfered, " + msfile.Length.ToString() + " / " + zfileInfo.size + "Bytes transfered");
}
else
{
Console.WriteLine("File successfully transfered, " + msfile.Length.ToString() + " Bytes transfered!");
}
//Thread.Sleep(200);
continue;
}
else
{
Console.WriteLine("An unattempted header had been received: " + hdata.type.ToString());
}
continue;
}
else if (ZackRequested)
{
SendCommand(BuildZACKFrame((int)msfile.Position));
continue;
}
else
{
continue;
}
}
else if (HeaderInProgress)
{
hdata.ReceivedNewByteInHeader(b, ref ErrorInHeader, ref HeaderInProgress);
if (ErrorInHeader)
{
state = TransfertState.Error;
receivedBytes.Clear();
portserie.DiscardOutBuffer();
SendCommand(BuildZNACKFrame());
HeaderInProgress = false;
continue;
}
else if (HeaderInProgress)
{
continue;
}
else
{
//Analyze header and answer accordingly
if (hdata.type == HeaderType.ZRQINIT)
{
state = TransfertState.Initialized;
portserie.DiscardOutBuffer();
SendCommand(BuildZRINITFrame(ZRINIT_Header_ZF0.CANBREAK, 1024));
}
else if (hdata.type == HeaderType.ZFILE)
{
bdata = new BynaryDataSubPacketReceiver(ref msZfile);
FrameInProgress = true;
}
else if (hdata.type == HeaderType.ZDATA)
{
if (hdata.GetIntArg() != msfile.Position)
{
throw new Exception("Position Error: Stream is not starting from the right place!");
}
state = TransfertState.Transfering;
bdata = new BynaryDataSubPacketReceiver(ref msfile);
bdata.BytesTransferedEvent += new BynaryDataSubPacketReceiver.BytesTransferedHandler(bdata_BytesTransferedEvent);
FrameInProgress = true;
}
else if (hdata.type == HeaderType.ZEOF)
{
Console.Write("End of file... ");
state = TransfertState.Ended;
portserie.DiscardOutBuffer();
HeaderInProgress = false;
SendCommand(BuildZRINITFrame(ZRINIT_Header_ZF0.CANBREAK, 1024));
}
else if (hdata.type == HeaderType.ZFIN)
{
Console.Write("End of File List...");
state = TransfertState.ClosingSession;
SendCommand(BuildZFINFrame());
}
else
{
throw new Exception("Unknow case??");
}
continue;
}
}
else
{
sdata.ReceivedNewByte(b, ref SessionInit, ref SessionClose, ref HeaderInProgress, ref ErrorInData);
if (ErrorInData)
{
portserie.DiscardInBuffer();
portserie.DiscardOutBuffer();
receivedBytes.Clear();
Thread.Sleep(100);
SendCommand("");
ErrorInData = false;
}
else if (HeaderInProgress)
{
hdata = new HeaderReceiver();
StartReceiveHeader = DateTime.Now;
}
else if (NextByteHeader)
{
Console.WriteLine("This byte should have been * !!");
NeedAttnSeq = true;
Thread.Sleep(0);
Thread.Sleep(100);
portserie.DiscardInBuffer();
receivedBytes.Clear();
SendCommand(ZModem.EndOfSession);
}
else if (SessionClose)
{
return;
}
continue;
}
}
if (HeaderInProgress)
{
if ((DateTime.Now - StartReceiveHeader).TotalMilliseconds > 500)
{
Console.WriteLine("Too much time without an header!");
NeedAttnSeq = true;
ThreadRequestSerialPort = true;
portserie.DiscardOutBuffer();
portserie.DiscardInBuffer();
receivedBytes.Clear();
Thread.Sleep(500);
SendCommand(BuildZRPOSFrame((int)msfile.Position));
HeaderInProgress = false;
}
}
else
{
Thread.Sleep(0);
}
}
//Console.WriteLine("Treatment Thread Stops!");
}
