/// <summary>
/// Processes a byte received on the bus.
/// </summary>
/// <param name="data">Byte recevied on the bus</param>
public bool ProcessData(byte data)
{
//Console.Write("{0,2:x} ", data);
bool packetReady = false;
switch (_state)
{
case BUSRECIEVESTATE.PACKET_S_START:
if (data == START_BYTE)
{
//Console.WriteLine("Start");
_state = BUSRECIEVESTATE.PACKET_S_LEADIN;
}
else
{
//Console.WriteLine("Skip");
}
break;
case BUSRECIEVESTATE.PACKET_S_LEADIN:
if (data == LEADIN_BYTE)
{
//Console.WriteLine("Leadin");
_state = BUSRECIEVESTATE.PACKET_S_ADDRESS;
}
else
{
//Console.WriteLine("Reset");
_state = BUSRECIEVESTATE.PACKET_S_START;
}
break;
case BUSRECIEVESTATE.PACKET_S_ADDRESS:
//Console.WriteLine("Destination");
_parseTimer.Stop();
_parseTimer.Start();
_currentPacket = new EosPacket();
_currentPacket.Destination = data;
_state = BUSRECIEVESTATE.PACKET_S_SRC;
break;
case BUSRECIEVESTATE.PACKET_S_SRC:
//Console.WriteLine("Source");
_parseTimer.Stop();
_parseTimer.Start();
_currentPacket.Source = data;
_state = BUSRECIEVESTATE.PACKET_S_COMMAND;
break;
case BUSRECIEVESTATE.PACKET_S_COMMAND:
//Console.WriteLine("Command");
_parseTimer.Stop();
_parseTimer.Start();
_currentPacket.Command = data;
_state = BUSRECIEVESTATE.PACKET_S_DATALEN;
break;
case BUSRECIEVESTATE.PACKET_S_DATALEN:
//Console.WriteLine("Data Length");
_parseTimer.Stop();
_parseTimer.Start();
_dataRemainig = data;
if (_dataRemainig > 0)
{
_state = BUSRECIEVESTATE.PACKET_S_DATA;
}
else
{
_state = BUSRECIEVESTATE.PACKET_S_CHKSUM;
}
break;
case BUSRECIEVESTATE.PACKET_S_DATA:
//Console.WriteLine("Data");
_parseTimer.Stop();
_parseTimer.Start();
_currentPacket.Add(data);
if (--_dataRemainig == 0)
{
_state = BUSRECIEVESTATE.PACKET_S_CHKSUM;
}
break;
case BUSRECIEVESTATE.PACKET_S_CHKSUM:
_parseTimer.Stop();
if (_parseTimer != null)
{
_parseTimer.Stop();
}
if (data == _currentPacket.Checksum)
{
//Console.WriteLine("Good Packet");
OnPacketReceived(_currentPacket);
}
else
{
//Console.WriteLine("Bad Packet");
OnParesError(EosParserError.CorruptPacket);
}
Reset();
packetReady = true;
break;
}
return packetReady;
}
/// <summary>
/// Resets the parser to start looking for the packet start.
/// </summary>
public void Reset()
{
_parseTimer.Stop();
_state = BUSRECIEVESTATE.PACKET_S_START;
_currentPacket = null;
}