public cFlowTEX()
{
TheSerialPort = new SerialPort();
RequestMState = eRequestMState.eFLOW;
bActive = false;
RequestStatus = eRequestStatus.eSTANDBY;
SerialMode = eSerialMode.eCLOSED;
flow = 0;
temperature = 0;
}
public void connect()
{
bDisconnect = false;
if (bActive)
{
SerialMode = eSerialMode.eSETUP;
portOpenRetry = 3;
}
}
public void disconnect()
{
if (bActive)
{
if (TheSerialPort.IsOpen)
{
TheSerialPort.Close();
}
}
bDisconnect = true;
SerialMode = eSerialMode.eCLOSED;
}
void poll()
{
int data = -1;
try
{
if (TheSerialPort.IsOpen)
{
do
{
try
{
if (TheSerialPort.BytesToRead > 0)
{
data = TheSerialPort.ReadByte();
}
else
{
data = -1;
}
}
catch
{
data = -1;
}
finally
{
TexNET.messagePoll(data);
TexNET.process();
byte[] bufferTX = TexNET.getDataToSend();
if ((bufferTX != null) && (bufferTX.Length > 0))
{
TheSerialPort.Write(bufferTX, 0, bufferTX.Length);
TexNET.dataSent();
}
}
}while((data >= 0) && (TheSerialPort.IsOpen));
}
}
catch
{
}
if ((bError) && (RequestStatus == eRequestStatus.eNEW_REQUEST))
{
RequestStatus = eRequestStatus.eFAIL;
}
if (TheSerialPort.IsOpen)
{
switch (RequestMState)
{
default:
case eRequestMState.eFLOW:
{
TexNET.sendRequest(cMTDOpcodes.OPC_READ_FLOW, null);
RequestMState = eRequestMState.eFLOW_ANSWER;
break;
}
case eRequestMState.eFLOW_ANSWER:
{
if (!TexNET.isWaitingAnswer())
{
if (TexNET.getAnswer(out byte opcode, out byte[] msg, out int length))
{
if ((opcode == cMTDOpcodes.OPC_READ_FLOW) && (length >= 8))
{
flow = BitConverter.ToSingle(msg, 0);
temperature = BitConverter.ToSingle(msg, 4);
bError = false;
}
}
else
{
if (SerialMode != eSerialMode.eCLOSED)
{
portOpenRetry = 3;
SerialMode = eSerialMode.eSETUP;
bError = true;
}
}
if (RequestStatus == eRequestStatus.eNEW_REQUEST)
{
RequestMState = eRequestMState.eUSER_REQUEST;
}
else
{
RequestMState = eRequestMState.eFLOW;
}
}
break;
}
case eRequestMState.eUSER_REQUEST:
{
TexNET.sendRequest(NewRequest.Opcode, NewRequest.Msg);
RequestStatus = eRequestStatus.eWAITTING;
RequestMState = eRequestMState.eUSER_ANSWER;
break;
}
case eRequestMState.eUSER_ANSWER:
{
if (!TexNET.isWaitingAnswer())
{
if (TexNET.getAnswer(out byte opcode, out byte[] msg, out int length))
{
if (opcode == NewRequest.Opcode)
{
NewRequest.Opcode = opcode;
NewRequest.Msg = msg;
NewRequest.Length = (byte)length;
RequestStatus = eRequestStatus.eSUCCESS;
bError = false;
}
else
{
RequestStatus = eRequestStatus.eFAIL;
if (SerialMode != eSerialMode.eCLOSED)
{
portOpenRetry = 3;
SerialMode = eSerialMode.eSETUP;
bError = true;
}
}
}
else
{
RequestStatus = eRequestStatus.eFAIL;
if (SerialMode != eSerialMode.eCLOSED)
{
portOpenRetry = 3;
SerialMode = eSerialMode.eSETUP;
bError = true;
}
}
RequestMState = eRequestMState.eFLOW;
}
break;
}
}
}
}
void task()
{
while (!TaskEnd)
{
if (bDisconnect)
{
SerialMode = eSerialMode.eCLOSED;
}
switch (SerialMode)
{
case eSerialMode.eCLOSED:
{
if (TheSerialPort.IsOpen)
{
TheSerialPort.Close();
}
bError = true;
bDisconnect = false;
if ((RequestStatus == eRequestStatus.eNEW_REQUEST) || (RequestStatus == eRequestStatus.eWAITTING))
{
RequestStatus = eRequestStatus.eFAIL;
}
break;
}
case eSerialMode.eSETUP:
{
if (TheSerialPort.IsOpen)
{
TheSerialPort.Close();
}
if (AutoDetectPort)
{
try
{
List <string> Ports = new List <string>(System.IO.Ports.SerialPort.GetPortNames());
if (Ports.Count > 0)
{
Ports.Sort();
if (portIdx < 0)
{
portIdx = 0;
}
else
{
portIdx++;
}
if (portIdx >= Ports.Count)
{
portIdx = 0;
}
TheSerialPort.PortName = Ports[portIdx];
}
else
{
portIdx = -1;
}
}
catch
{
portIdx = -1;
}
}
SerialMode = eSerialMode.eOPEN;
break;
}
case eSerialMode.eOPEN:
{
if (!TheSerialPort.IsOpen)
{
try
{
TheSerialPort.BaudRate = 115200;
TheSerialPort.Open();
}
catch
{
bError = true;
if (portOpenRetry == 0)
{
portOpenRetry = 3;
SerialMode = eSerialMode.eSETUP;
}
else
{
portOpenRetry--;
}
}
}
else
{
TheSerialPort.Close();
}
if (TheSerialPort.IsOpen)
{
SerialMode = eSerialMode.eTEXNET;
bError = false;
}
break;
}
case eSerialMode.eTEXNET:
{
if (!TheSerialPort.IsOpen)
{
portOpenRetry = 3;
SerialMode = eSerialMode.eSETUP;
bError = true;
}
else
{
poll();
}
break;
}
}
Thread.Sleep(10);
}
}
