/// <summary>
///This function gets message from the remote unit.
/// </summary>
/// <param name="cRxmsg">received message</param>
/// <param name="cTxmsg">transmited message, information about this frmae are necessary for checking if this is correct answer</param>
/// <param name="cInfinitewait">true if this function should wait infinite time for the first character - true for slave side , false in master </param>
/// <param name="cStation_addrress">address of station - When this function is used by slavet</param>
/// <param name="cReset">the value is set to true if we expected response, but have gor request - we must reset and wait for response </param>
/// <returns>
/// ALRes_Success: Operation accomplished successfully
/// ALRes_DatTransferErrr: Data transfer is imposible because of a communication error – loss of
/// communication with a station
/// ALRes_DisInd: Disconnect indication – connection has been shut down remotely or lost because of
/// communication error. Data is unavailable
/// </returns>
private AL_ReadData_Result GetMessage(out FrameStateMachine cRxmsg, FrameStateMachine cTxmsg, bool cInfinitewait, int cStation_addrress, ref bool cReset)
{
IntercharStopwatch.StartReset();
TimeSpan currTimeOut;
if (!cInfinitewait)
{
currTimeOut = this.GetProtocolParameters.ResponseTimeOutSpan;
}
else
{
currTimeOut = TimeSpan.MaxValue;
}
RecStateEnum currRecState = RecStateEnum.RSE_BeforeHeading;
cRxmsg = m_Pool.GetEmptyISesDBuffer();
cRxmsg.InitMsg(cTxmsg);
bool continueDo = true;
bool flushWait = false;
do
{
RecEventEnum lastRecEvent = RecEventEnum.REE_TimeOut;
byte lastChar;
switch (GetICommunicationLayer.GetChar(out lastChar, Convert.ToInt32(currTimeOut.TotalMilliseconds)))
{
case TGetCharRes.Success:
switch (cRxmsg.DepositeChar(lastChar))
{
case FrameStateMachine.DepCharacterTypeEnum.DCT_Last:
lastRecEvent = RecEventEnum.REE_NewCharLastOne;
break;
case FrameStateMachine.DepCharacterTypeEnum.DCT_Reset_Answer:
GetIProtocolParent.IncStRxSynchError(); //wrong frame type so synchronization error must be monitored
cReset = true;
lastRecEvent = RecEventEnum.REE_NewChar;
break;
case FrameStateMachine.DepCharacterTypeEnum.DCT_Ordinary:
lastRecEvent = RecEventEnum.REE_NewChar;
break;
case FrameStateMachine.DepCharacterTypeEnum.DCT_SOH:
lastRecEvent = RecEventEnum.REE_NewCharSOH;
break;
}
break;
case TGetCharRes.Timeout:
lastRecEvent = RecEventEnum.REE_TimeOut;
break;
case TGetCharRes.DisInd:
cRxmsg.ReturnEmptyEnvelope();
cRxmsg = null;
AssemblyTraceEvent.Tracer.TraceEvent(TraceEventType.Verbose, 115, $"SBUSProtocol.GetMessage(): {nameof(TGetCharRes.DisInd)} has occured during receiving frame, I am exitting the receiving loop and returning AL_ReadData_Result.ALRes_DisInd");
return(AL_ReadData_Result.ALRes_DisInd);
}
switch (currRecState)
{
case RecStateEnum.RSE_BeforeHeading:
{
#region RecStateEnum.RSE_BeforeHeading
switch (lastRecEvent)
{
case RecEventEnum.REE_NewChar:
break;
case RecEventEnum.REE_NewCharSOH:
{
currRecState = RecStateEnum.RSE_InsideFrame;
GetIProtocolParent.TimeMaxResponseDelayAdd((long)(CAS.Lib.RTLib.Processes.Stopwatch.ConvertTo_ms(IntercharStopwatch.Reset)));
currTimeOut = ((SBUS_ProtocolParameters)GetProtocolParameters).TimeoutSpanAfterFrame;
break;
}
case RecEventEnum.REE_TimeOut:
GetIProtocolParent.IncStRxNoResponseCounter();
cRxmsg.ReturnEmptyEnvelope();
cRxmsg = null;
AssemblyTraceEvent.Tracer.TraceEvent
(
TraceEventType.Verbose, 137, "SBUSProtocol.GetMessage():RecStateEnum.RSE_BeforeHeading: RecEventEnum.REE_TimeOut has occurred during receiving frame, I am exiting the receiving loop with AL_ReadData_Result.ALRes_DatTransferErrr"
);
return(AL_ReadData_Result.ALRes_DatTransferErrr);
}
;
break;
#endregion
}
case RecStateEnum.RSE_InsideFrame:
{
#region RecStateEnum.RSE_InsideFrame
switch (lastRecEvent)
{
case RecEventEnum.REE_NewChar:
GetIProtocolParent.TimeCharGapAdd((long)(CAS.Lib.RTLib.Processes.Stopwatch.ConvertTo_us(IntercharStopwatch.Reset)));
break;
case RecEventEnum.REE_NewCharLastOne:
GetIProtocolParent.TimeCharGapAdd((long)(CAS.Lib.RTLib.Processes.Stopwatch.ConvertTo_us(IntercharStopwatch.Reset)));
continueDo = false;
break;
case RecEventEnum.REE_TimeOut:
if (flushWait)
{
AssemblyTraceEvent.Tracer.TraceEvent(TraceEventType.Information, 200, "SBUSProtocol.GetMessage(): Timeout has occurred during receiving frame, I am emitting the receiving loop");
continueDo = false;
break;
}
else
{
currTimeOut = ((SBUS_ProtocolParameters)GetProtocolParameters).TimeoutSpanAfterFrame;
flushWait = true;
break;
}
}
;
break;
#endregion
}
}
}while (continueDo);
return(AL_ReadData_Result.ALRes_Success);
}//GetMessage
/// <summary>
/// This function gets message from the remote unit.
/// </summary>
/// <param name="Rxmsg">Received message</param>
/// <param name="Txmsg">Transmited message, information about this frmae could be necessary to properly init received frame.
/// </param>
/// <returns>
/// ALRes_Success: Operation accomplished successfully
/// ALRes_DatTransferErrr: Data transfer is imposible because of a communication error – loss of
/// communication with a station
/// ALRes_DisInd: Disconnect indication – connection has been shut down remotely or lost because of
/// communication error. Data is unavailable
/// </returns>
protected override AL_ReadData_Result GetMessage(out MBUS_message Rxmsg, MBUS_message Txmsg)
{
int QuantityOfByteInMessage = 0;
bool cInfinitewait = false;
IntercharStopwatch.StartReset();
TimeSpan currTimeOut;
if (!cInfinitewait)
{
currTimeOut = this.GetProtocolParameters.ResponseTimeOutSpan;
}
else
{
currTimeOut = TimeSpan.MaxValue;
}
RecStateEnum currRecState = RecStateEnum.RSE_BeforeHeading;
Rxmsg = m_Pool.GetEmptyISesDBuffer();
Rxmsg.InitMsg(Txmsg);
bool continueDo = true;
bool flushWait = false;
do
{
RecEventEnum lastRecEvent = RecEventEnum.REE_TimeOut;
byte lastChar;
switch (GetICommunicationLayer.GetChar(out lastChar, Convert.ToInt32(currTimeOut.TotalMilliseconds)))
{
case TGetCharRes.Success:
switch (Rxmsg.DepositeChar(lastChar))
{
case DepCharacterTypeEnum.DCT_Last:
lastRecEvent = RecEventEnum.REE_NewCharLastOne;
break;
case DepCharacterTypeEnum.DCT_Reset_Answer:
GetIProtocolParent.IncStRxSynchError(); //dostalismy ramke nie taka jak trzeba wiec ustawiamy blad jako blad synchronizacji
lastRecEvent = RecEventEnum.REE_NewChar;
break;
case DepCharacterTypeEnum.DCT_Ordinary:
lastRecEvent = RecEventEnum.REE_NewChar;
break;
case DepCharacterTypeEnum.DCT_SOH:
lastRecEvent = RecEventEnum.REE_NewCharSOH;
break;
}
QuantityOfByteInMessage++;
break;
case TGetCharRes.Timeout:
lastRecEvent = RecEventEnum.REE_TimeOut;
break;
case TGetCharRes.DisInd:
Rxmsg.ReturnEmptyEnvelope();
return(AL_ReadData_Result.ALRes_DisInd);
}
switch (currRecState)
{
case RecStateEnum.RSE_BeforeHeading:
{
#region RecStateEnum.RSE_BeforeHeading
switch (lastRecEvent)
{
case RecEventEnum.REE_NewChar:
break;
case RecEventEnum.REE_NewCharSOH:
{
currRecState = RecStateEnum.RSE_InsideFrame;
GetIProtocolParent.TimeMaxResponseDelayAdd((long)(CAS.Lib.RTLib.Processes.Stopwatch.ConvertTo_ms(IntercharStopwatch.Reset)));
currTimeOut = ((MBUS_ProtocolParameters)GetProtocolParameters).CharacterTimeoutSpan;
break;
}
case RecEventEnum.REE_TimeOut:
GetIProtocolParent.IncStRxNoResponseCounter();
Rxmsg.ReturnEmptyEnvelope();
Rxmsg = null;
return(AL_ReadData_Result.ALRes_DatTransferErrr);
}
;
break;
#endregion
}
case RecStateEnum.RSE_InsideFrame:
{
#region RecStateEnum.RSE_InsideFrame
switch (lastRecEvent)
{
case RecEventEnum.REE_NewChar:
GetIProtocolParent.TimeCharGapAdd((long)(CAS.Lib.RTLib.Processes.Stopwatch.ConvertTo_us(IntercharStopwatch.Reset)));
break;
case RecEventEnum.REE_NewCharLastOne:
GetIProtocolParent.TimeCharGapAdd((long)(CAS.Lib.RTLib.Processes.Stopwatch.ConvertTo_us(IntercharStopwatch.Reset)));
continueDo = false;
break;
case RecEventEnum.REE_TimeOut:
if (flushWait)
{
continueDo = false;
break;
}
else
{
currTimeOut = ((MBUS_ProtocolParameters)GetProtocolParameters).ResponseTimeOutSpan;//TimeoutAfterFrameTicks;
flushWait = true;
break;
}
}
;
break;
#endregion
}
}
}while (continueDo);
return(AL_ReadData_Result.ALRes_Success);
} //GetMessage