private TFrameEndSignalRes TransmitFrame(out byte[] buff, ICommunicationLayer ComPortCli)
{
buff = get_buffor();
NULL_message message = pool.GetEmptyISesDBuffer();
message.userDataLength = (ushort)buff.Length;
for (int i = 0; i < buff.Length; i++)
{
message.WriteByte(buff[i]);
}
// czas na wyslanie ramki:
ComPortCli.Flush();
string msg = "sending frame: " + buff.Length.ToString() + " size";
m_TraceSource.TraceVerbose(382, "TransmitFrame", msg);
TFrameEndSignalRes lastRes = ComPortCli.FrameEndSignal(message);
m_TraceSource.TraceVerbose(382, "TransmitFrame", "Frame has been sent");
message.ReturnEmptyEnvelope();
return(lastRes);
}
private bool SendReceive()
{
m_TraceSource.TraceVerbose(198, "SendReceive", "SendReceive has started");
Thread.Sleep(c_WaitAfterAndBeforeCommunication);
bool toBeReturned = true;
string msg = "";
State m_state = State.transmiting;
byte[] buff = null;
List <byte> receivebuff = new List <byte>(1024);
CAS.Lib.RTLib.Processes.Stopwatch mySW = new CAS.Lib.RTLib.Processes.Stopwatch();
byte oChar = byte.MaxValue;
while (m_state != State.leaving)
{
switch (m_state)
{
case State.transmiting:
{
m_state = State.receiving;
try
{
ComPortCli.Flush();
}
catch (Exception ex)
{
msg = String.Format
(msg, "Error: an exception has been thrown by the Flush : {0}", ex.Message);
m_TraceSource.TraceError(185, m_state.ToString(), msg);
}
try
{
switch (TransmitFrame(out buff, ComPortCli))
{
case TFrameEndSignalRes.Success:
break;
case TFrameEndSignalRes.DisInd:
msg = "Error: disconnected while sending frame";
m_TraceSource.TraceError(174, m_state.ToString(), msg);
m_state = State.error;
break;
}
}
catch (Exception ex)
{
msg = String.Format
(msg, "Error: an exception has been thrown by the TransmitFrame : {0}", ex.Message);
m_TraceSource.TraceError(185, m_state.ToString(), msg);
if (!ComPortCli.Connected)
{
m_state = State.error;
}
}
break;
}
case State.receiving:
receivebuff.Clear();
mySW.StartReset();
m_state = State.gettingChar;
msg = "State.receiving - ComPortCli.GetChar( out oChar, c_FrameTimeout ) ";
m_TraceSource.TraceVerbose(198, m_state.ToString(), msg);
try
{
switch (ComPortCli.GetChar(out oChar, c_FrameTimeout))
{
case TGetCharRes.Success:
break;
case TGetCharRes.Timeout:
m_state = State.error;
msg = "Timeout: no data received";
m_TraceSource.TraceInformation(208, m_state.ToString(), msg);
break;
case TGetCharRes.DisInd:
msg = "Error: disconected while waitin for next frame";
m_TraceSource.TraceError(214, m_state.ToString(), msg);
m_state = State.error;
break;
}
}
catch (Exception ex)
{
msg = String.Format("Error: an exception has been thrown by the GetChar: {0}", ex.Message);
m_TraceSource.TraceError(224, m_state.ToString(), msg);
if (!ComPortCli.Connected)
{
m_state = State.error;
}
}
break;
case State.gettingChar:
receivebuff.Add(oChar);
try
{
switch (ComPortCli.GetChar(out oChar, c_CharTimeout))
{
case TGetCharRes.Success:
break;
case TGetCharRes.Timeout:
m_state = State.leaving;
if (!CheckData(buff, receivebuff))
{
m_state = State.error;
}
break;
case TGetCharRes.DisInd:
msg = "Error: disconected while waitin for data";
m_TraceSource.TraceError(254, m_state.ToString(), msg);
m_state = State.error;
break;
}
}
catch (Exception ex)
{
msg = String.Format("Error: an exception has been thrown by the GetChar : {0}", ex.Message);
m_TraceSource.TraceError(264, m_state.ToString(), msg);
if (!ComPortCli.Connected)
{
m_state = State.error;
}
}
break;
case State.error:
toBeReturned = false;
m_state = State.leaving;
break;
default:
break;
}
}
Thread.Sleep(c_WaitAfterAndBeforeCommunication);
return(toBeReturned);
}