public virtual bool Receive(SerialPort serialPort)
{
if (serialPort == null)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs("Invalid serial port. (null)");
OnError(this, e);
}
return false;
}
if (SlaveAddress == 0)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs(String.Format("Invalid slave address. ({0})", SlaveAddress));
OnError(this, e);
}
return false;
}
if (CommandCode == 0)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs(String.Format("Invalid command code. (0x{0x2})", CommandCode));
OnError(this, e);
}
return false;
}
if (!serialPort.IsOpen)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs("Serial port is not open.");
OnError(this, e);
}
return false;
}
byte[] buf = new byte[1];
try
{
if (serialPort.Read(buf, 0, 1) < 1)
return false;
}
catch (Exception ex)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs(ex);
OnError(this, e);
}
return false;
}
if (OnReceive != null)
{
LogEventArgs e = new LogEventArgs(buf, 1);
OnReceive(this, e);
}
if (buf[0] != SlaveAddress)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs(String.Format("Invalid slave address received. ({0})", buf[0]));
OnError(this, e);
}
return false;
}
try
{
if (serialPort.Read(buf, 0, 1) < 1)
return false;
}
catch (Exception ex)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs(ex);
OnError(this, e);
}
return false;
}
if (OnReceive != null)
{
LogEventArgs e = new LogEventArgs(buf, 1);
OnReceive(this, e);
}
if (buf[0] != _commandCode + 1)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs(String.Format("Invalid command code received. (0x{0x2})", buf[0]));
OnError(this, e);
}
return false;
}
try
{
if (serialPort.Read(buf, 0, 1) < 1)
return false;
}
catch (Exception ex)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs(ex);
OnError(this, e);
}
return false;
}
if (OnReceive != null)
{
LogEventArgs e = new LogEventArgs(buf, 1);
OnReceive(this, e);
}
byte length = buf[0];
if (length < 4)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs(String.Format("Invalid length received. ({0})", length));
OnError(this, e);
}
return false;
}
Length = length;
_buffer[0] = SlaveAddress;
_buffer[1] = (byte)(_commandCode + 1);
_buffer[2] = length;
int dataLen = 0;
try
{
dataLen = serialPort.Read(_buffer, 3, Length - 3);
}
catch (Exception ex)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs(ex);
OnError(this, e);
}
}
if (OnReceive != null)
{
LogEventArgs e = new LogEventArgs(_buffer, 3, dataLen);
OnReceive(this, e);
}
if (dataLen != Length)
return false;
if (_buffer[Length - 1] != Crc8(_buffer, Length - 1))
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs("Receive CRC error.");
OnError(this, e);
}
return false;
}
return true;
}
public virtual bool Send(SerialPort serialPort)
{
if (serialPort == null)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs("Invalid serial port. (null)");
OnError(this, e);
}
return false;
}
if (SlaveAddress == 0)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs(String.Format("Invalid slave address. ({0})", SlaveAddress));
OnError(this, e);
}
return false;
}
if (CommandCode == 0)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs(String.Format("Invalid command code. (0x{0x2})", CommandCode));
OnError(this, e);
}
return false;
}
if (!serialPort.IsOpen)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs("Serial port is not open.");
OnError(this, e);
}
return false;
}
if (_buffer == null)
DataLength = 0;
if (_buffer == null)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs("Could not initialize buffer.");
OnError(this, e);
}
return false;
}
if (_pos < _buffer.Length - 1)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs("Incomplete data. The buffer was not filled.");
OnError(this, e);
}
return false;
}
try
{
_buffer[0] = SlaveAddress;
_buffer[1] = CommandCode;
_buffer[2] = Length;
_buffer[Length - 1] = Crc8(_buffer, Length - 1);
if (OnSend != null)
{
LogEventArgs e = new LogEventArgs(_buffer, Length);
OnSend(this, e);
}
serialPort.Write(_buffer, 0, _buffer.Length);
}
catch (Exception ex)
{
if (OnError != null)
{
ErrorEventArgs e = new ErrorEventArgs(ex);
OnError(this, e);
}
return false;
}
return true;
}