// serial port data received event handler
private void serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
Byte[] recvData = new Byte[serialPort.BytesToRead];
serialPort.Read(recvData, 0, recvData.Length);
for (int i = 0; i < recvData.Length; i++)
{
Byte c = recvData[i];
switch (rxState)
{
case RxState.READY:
if (c == CODE_STX)
{
rxState = RxState.RECEIVING;
rxBufferIdx = 0;
}
break;
case RxState.RECEIVING:
if (c == CODE_STX)
{
rxBufferIdx = 0;
}
else if (c == CODE_ETX)
{
rxBuffer[rxBufferIdx] = 0x00;
ssAPI.executeCommand(rxBuffer);
rxState = RxState.READY;
}
else
{
rxBuffer[rxBufferIdx] = c;
rxBufferIdx++;
if (rxBufferIdx >= RX_BUFFER_SIZE)
{
rxState = RxState.READY;
}
}
break;
default:
rxState = RxState.READY;
break;
}
}
}
// initialize
public SerialScreenServer(FormMain parent)
{
// serial port
serialPort = new SerialPort();
serialPort.PortName = "COM1"; // default
serialPort.BaudRate = 9600; // default
serialPort.Parity = System.IO.Ports.Parity.None;
serialPort.DataBits = 8;
serialPort.StopBits = System.IO.Ports.StopBits.One;
serialPort.ReadTimeout = 3000; // need not?
serialPort.ReceivedBytesThreshold = 1;
serialPort.DataReceived += new SerialDataReceivedEventHandler(serialPort_DataReceived);
rxState = RxState.READY;
rxBuffer = new Byte[RX_BUFFER_SIZE];
rxBufferIdx = 0;
ssAPI = new SerialScreenAPI();
ssAPI.setPictureBox(parent);
}
// open
public bool open()
{
serialPort.Close();
try
{
serialPort.Open();
serialPort.DiscardInBuffer();
serialPort.DiscardOutBuffer();
rxState = RxState.READY;
rxBufferIdx = 0;
}
catch
{
errorMessage = "Can not open " + serialPort.PortName;
serialPort.Close();
return(false);
}
return(true);
}
private void AuthCallback(string x)
{
if (x.Substring(0, 1) == "v")
{
string version = x.Substring(0, 4);
// *prays that this versioning system doesn't go away*
IRxProtocol p;
if (!ProtocolManager.TryGetProtocol(version, out p))
{
throw new RxRemoteException(
"Unknown version detected from server. This likely means the server is running a newer protocol version than this client supports.");
}
Protocol = p;
State |= RxState.Opened;
RxDataReceiveCallback -= AuthCallback;
wait.Set();
}
}
protected virtual void OnAsyncRead(Task <String> task)
{
if (task.Result != null && !task.IsFaulted && !task.IsCanceled)
{
if (RxDataReceiveCallback != null)
{
RxDataReceiveCallback(task.Result);
}
reader.ReadLineAsync().ContinueWith(OnAsyncRead, source.Token);
}
else if (task.Exception != null)
{
throw new RxRemoteException(
"An error occurred reading from the remote client. See inner exception for more details.",
task.Exception);
}
else if (task.IsCanceled)
{
State = RxState.Closed;
client.Close();
}
}
public bool EvalNextByte(byte b)
{
bool ret = false;
_consumedHeader.Add(b);
switch (_currentState)
{
case RxState.WaitForStatusInfo:
if (b == (byte)AvrPacketType.LiftStatus)
{
_currentState = RxState.WaitForLen;
ret = true;
}
else if (b == (byte)AvrPacketType.TraceMessage)
{
_currentState = RxState.WaitForTraceMsgLen;
ret = true;
}
else if (b == (byte)AvrPacketType.ReadRegister)
{
_currentState = RxState.WaitRxReadRegLen;
}
else if (b == (byte)AvrPacketType.WriteRegister)
{
_currentState = RxState.WaitRxWriteRegStatus;
}
break;
case RxState.WaitRxReadRegLen:
_expectedRegisterBytes = b;
_regData.Clear();
if (_expectedRegisterBytes == 0) // there was a problem
{
NotifyRegisterDataReceived();
_currentState = RxState.WaitForStatusInfo;
}
else
{
_receivedRegisterBytes = 0;
_currentState = RxState.WaitRxReadRegData;
}
break;
case RxState.WaitRxReadRegData:
_regData.Add(b);
_receivedRegisterBytes++;
if (_receivedRegisterBytes == _expectedRegisterBytes)
{
_currentState = RxState.WaitForStatusInfo;
NotifyRegisterDataReceived();
}
break;
case RxState.WaitRxWriteRegStatus:
bool status = b == 1;
_currentState = RxState.WaitForStatusInfo;
NotifyWriteRegStatus(status);
break;
case RxState.WaitForLen:
_currentState = RxState.WaitForStatusInfo;
if (b == 6)
{
_currentState = RxState.WaitForSynch1;
ret = true;
}
else if (b == 4)
{
_currentState = RxState.WaitForLen;
}
break;
case RxState.WaitForSynch1:
_currentState = RxState.WaitForStatusInfo;
if (b == 0xA5)
{
_currentState = RxState.WaitForSynch2;
ret = true;
}
break;
case RxState.WaitForSynch2:
_currentState = RxState.WaitForStatusInfo;
if (b == 0x5A)
{
_currentState = RxState.WaitForStatus;
ret = true;
}
break;
case RxState.WaitForStatus:
_status = b;
_currentState = RxState.WaitForDoorOpen;
ret = true;
break;
case RxState.WaitForDoorOpen:
_status = (_status << 8) | b;
NotifyStatusReceived();
Consumed.Clear();
_currentState = RxState.WaitForStatusInfo;
_status = 0;
ret = true;
break;
case RxState.WaitForTraceMsgLen:
if ((b & (byte)AvrPacketType.TraceMassagePadLen) == (byte)AvrPacketType.TraceMassagePadLen)
{
_currentState = RxState.RxTraceMessage;
_expectedTraceBytes = (b & 7) + 2; // the id is implicit
_receivedTraceBytes = 0;
_traceMessage.Clear();
ret = true;
}
else
{
_currentState = RxState.WaitForStatusInfo;
Consumed.Clear();
}
break;
case RxState.RxTraceMessage:
_receivedTraceBytes++;
_traceMessage.Add(b);
if (_receivedTraceBytes == _expectedTraceBytes)
{
_consumedHeader.Clear();
_currentState = RxState.WaitForStatusInfo;
NotifyTrace();
}
ret = true;
break;
}
return(ret);
}
private void ProcessBuffer()
{
while (m_rxBuffer.BytesToRead != 0)
{
byte ch = GetCh();
switch (m_rxState)
{
case RxState.WaitDollar:
if (ch == '$')
{
m_rxState = RxState.WaitG;
}
break;
case RxState.WaitG:
if (ch == 'G')
{
m_rxState = RxState.WaitP;
}
else
{
m_rxState = RxState.WaitDollar;
}
break;
case RxState.WaitP:
if (ch == 'P')
{
m_rxState = RxState.WaitEnd;
m_sentence.SetLength(0);
}
else
{
m_rxState = RxState.WaitDollar;
}
break;
case RxState.WaitEnd:
if (ch == '\r')
{
m_sentence.Seek(0, SeekOrigin.Begin);
DecodeSentence(m_sentence);
m_sentence.SetLength(0);
m_rxState = RxState.WaitDollar;
}
else
{
if (m_sentence.Length > 80)
{
m_sentence.SetLength(0);
m_rxState = RxState.WaitDollar;
}
else
{
m_sentence.WriteByte(ch);
}
}
break;
}
}
}
private void AuthCallback(string x)
{
if (x.Substring(0, 1) == "v")
{
string version = x.Substring(0, 4);
// *prays that this versioning system doesn't go away*
IRxProtocol p;
if (!ProtocolManager.TryGetProtocol(version, out p))
{
throw new RxRemoteException(
"Unknown version detected from server. This likely means the server is running a newer protocol version than this client supports.");
}
Protocol = p;
State |= RxState.Opened;
RxDataReceiveCallback -= AuthCallback;
wait.Set();
}
}
protected virtual void OnAsyncRead(Task<String> task)
{
if (task.Result != null && !task.IsFaulted && !task.IsCanceled)
{
if (RxDataReceiveCallback != null)
{
RxDataReceiveCallback(task.Result);
}
reader.ReadLineAsync().ContinueWith(OnAsyncRead, source.Token);
}
else if (task.Exception != null)
{
throw new RxRemoteException(
"An error occurred reading from the remote client. See inner exception for more details.",
task.Exception);
}
else if (task.IsCanceled)
{
State = RxState.Closed;
client.Close();
}
}
/// <summary>
/// Start is called on the frame when a script is enabled just before
/// any of the Update methods is called the first time.
/// </summary>
void Start()
{
coin = 0;
single = this;
}
public bool setRXbyte( byte rcv )
{
bool wakePacketIsReceived = false;
if( rcv == Constants.FEND ) {
state = RxState.BEGIN;
}
// byte stuffing
if( rcv == Constants.FESC && flagFESC == false ) {
flagFESC = true;
return false;
}
if( flagFESC == true ) {
flagFESC = false;
if( rcv == Constants.TFEND )
rcv = Constants.FEND;
else if( rcv == Constants.TFESC )
rcv = Constants.FESC;
}
// end byte stuffing
switch( state ) {
case RxState.BEGIN:
if( rcv == Constants.FEND ) {
state = RxState.STARTPACKET;
}
break;
case RxState.STARTPACKET:
if( ( rcv & 0x80 ) != 0 ) {
sendAddress = true;
state = RxState.ADDRESS;
this.Address = ( (byte)( rcv & 0x7F ) );
} else {
sendAddress = false;
state = RxState.COMMAND;
this.Address = ( (byte)0 );
this.Command = rcv;
}
break;
case RxState.ADDRESS:
state = RxState.COMMAND;
this.Command = rcv;
break;
case RxState.COMMAND: // receive CntData
m_data.Clear();
state = ( rcv != 0 ) ? RxState.DATA : RxState.CRC;
rxdataCnt = rcv;
if( rxdataCnt > Constants.SLIPFRAME ) { // err: packet is very long
throw new ArgumentException( "Received WakeUp packet is very long" );
}
break;
case RxState.DATA:
m_data.Add( rcv );
if( m_data.Count == rxdataCnt ) {
state = RxState.CRC;
}
break;
case RxState.CRC:
this.CodeErr = ( rcv == (byte)performCRCcalculation() )
? Constants.ERR_NO
: Constants.ERR_TX;
state = RxState.BEGIN;
wakePacketIsReceived = true;
break;
}
return wakePacketIsReceived;
}