private void timerOut_Tick(object sender, EventArgs e)
{
lock (_timerCheck)
{
var result = CheckData(_bytesReadArray);
switch (result.Status)
{
case ModBusStatus.PresetMultipleRegistersOK:
case ModBusStatus.ReadHoldingRegistersOK:
case ModBusStatus.CustomFunctionOk:
_waitResponse = false;
ReceiveCounter++;
_timerCheck.Stop();
RaisePacketDetected(_bytesReadArray);
_eventArgument = result;
OnExchangeEnd();
break;
default:
ErrorCounter++;
if (!CheckRepeat())
{
_eventArgument = new ModBusEventArg()
{
Status = result.Status
};
OnExchangeEnd();
}
break;
}
}
}
/// <summary>
/// проверяем полученные данные
/// </summary>
private ModBusEventArg CheckData(byte[] buffer)
{
if (buffer == null || buffer.Length == 0)
{
return(new ModBusEventArg {
Status = ModBusStatus.TimeOutError
});
}
if (buffer.Length <= 2)
{
return(new ModBusEventArg {
Status = ModBusStatus.UnknowPacket
});
}
if (buffer[0] != _addressSlave)
{
return(new ModBusEventArg {
Status = ModBusStatus.AddressSlaveError
});
}
var function = buffer[1] & ~0x80;
var error = (buffer[1] & 0x80) == 0x80;
if (_requestFunction != function)
{
return(new ModBusEventArg {
Status = ModBusStatus.InvalidFunction
});
}
if (_endingSymbolEnable && buffer[buffer.Length - 1] != EndingSymbol)
{
return(new ModBusEventArg {
Status = ModBusStatus.NoEndingSymbol
});
}
if (!CRC.CheckCRC(buffer, 0, buffer.Length - (_endingSymbolEnable ? 3 : 2), buffer, buffer.Length - (_endingSymbolEnable ? 3 : 2)))
{
return(new ModBusEventArg {
Status = ModBusStatus.CRCError
});
}
if (error)
{
return(new ModBusEventArg
{
Status = ModBusStatus.FunctionError,
Function = buffer[1],
data = new short[] { buffer[2] },
});
}
// RecieveCounter++;
var ea = new ModBusEventArg
{
Function = buffer[1]
};
// Определяем тип функции
switch (function)
{
// Read Holding Registers
case 3:
ea.data = new short[buffer[2] / 2];
if (ea.Data.Length == _waitRegs)
{
ea.Status = ModBusStatus.ReadHoldingRegistersOK;
}
else
{
ea.Status = ModBusStatus.InvalidResponse;
}
int i = 0;
while (i != ea.data.Length)
{
ea.data[i] = (short)(buffer[i * 2 + 3] << 8);
ea.data[i] += buffer[i * 2 + 1 + 3];
i++;
}
break;
// Preset Multiple Registers
case 0x10:
ea.data = new short[0];
ea.Status = ModBusStatus.PresetMultipleRegistersOK;
break;
default:
ea.data = new short[buffer[2] / 2];
ea.Status = ModBusStatus.CustomFunctionOk;
i = 0;
while (i != ea.data.Length)
{
ea.data[i] = (short)(buffer[i * 2 + 3] << 8);
ea.data[i] += buffer[i * 2 + 1 + 3];
i++;
}
break;
}
return(ea);
}
private void timerCheck_Tick(object sender, EventArgs e)
{
lock (_timerCheck)
{
try
{
var count = _serialPort.BytesToRead;
if (count != 0)
{
if (_bytesReadArray == null || _bytesReadArray.Length == 0)
{
_bytesReadArray = new byte[count];
_serialPort.Read(_bytesReadArray, 0, count);
}
else
{
var bytesArray = new byte[count];
_serialPort.Read(bytesArray, 0, count);
var oldLength = _bytesReadArray.Length;
Array.Resize(ref _bytesReadArray, _bytesReadArray.Length + count);
Array.Copy(bytesArray, 0, _bytesReadArray, oldLength, count);
}
var result = CheckData(_bytesReadArray);
_timerOut.Stop();
switch (result.Status)
{
case ModBusStatus.PresetMultipleRegistersOK:
case ModBusStatus.ReadHoldingRegistersOK:
case ModBusStatus.CustomFunctionOk:
_waitResponse = false;
ReceiveCounter++;
RaisePacketDetected(_bytesReadArray);
_eventArgument = result;
OnExchangeEnd();
break;
case ModBusStatus.CRCError:
case ModBusStatus.UnknowPacket:
case ModBusStatus.None:
case ModBusStatus.NoEndingSymbol:
case ModBusStatus.TimeOutError:
_timerCheck.Start();
_timerOut.Reset();
break;
default:
ErrorCounter++;
RaisePacketDetected(_bytesReadArray);
if (!CheckRepeat())
{
_waitResponse = false;
_eventArgument = result;
OnExchangeEnd();
}
break;
}
return;
}
}
catch (InvalidOperationException exc)
{
if (CatchSerialException(exc))
{
return;
}
}
_timerCheck.Start();
}
}