public void CheckID(string id)
{
if (!IsCorrectID(id))
{
throw ExceptionRFID.Create(ErrorCodeRFID.INVALID_ID);
}
}
private void CheckPortOpen()
{
if (serialPort == null || !serialPort.IsOpen)
{
throw ExceptionRFID.Create(ErrorCodeRFID.SerialPortOpenError, PortName);
}
}
private void VerifyCheckSum(string rfidData)
{
_checkSumCalculate = CalculateCheckSum(rfidData);
if (_checkSumCalculate != (byte)rfidData[CheckSumByteNo])
{
throw ExceptionRFID.Create(ErrorCodeRFID.CHECKSUM_ERR);
}
}
public void DecodeWriteResponse(string writeResponse)
{
if (writeResponse.Length == 4 && writeResponse[0] == 'W' && writeResponse[1] == 'T')
{
DecodeErrorCode(writeResponse.Substring(2, 2));
}
else
{
throw ExceptionRFID.Create(ErrorCodeRFID.INVALID_DATA);
}
}
public byte DecodeCheckSum(string readData)
{
if (readData.Length == 5 && readData[0] == 'R' && readData[1] == 'D')
{
DecodeErrorCode(readData.Substring(2, 2));
return((byte)readData[4]);
}
else
{
throw ExceptionRFID.Create(ErrorCodeRFID.INVALID_DATA);
}
}
public string DecodeID(string readData)
{
if (readData.Length == 7 && readData[0] == 'R' && readData[1] == 'D')
{
DecodeErrorCode(readData.Substring(2, 2));
return(readData.Substring(4).Trim());
}
else
{
throw ExceptionRFID.Create(ErrorCodeRFID.INVALID_DATA);
}
}
private void DecodeErrorCode(string errorCodeString)
{
try
{
int errorCode = int.Parse(errorCodeString, System.Globalization.NumberStyles.HexNumber);
if (errorCode != 0)
{
throw ExceptionRFID.Create((ErrorCodeRFID)errorCode);
}
}
catch
{
throw ExceptionRFID.Create(ErrorCodeRFID.INVALID_DATA);
}
}
public void DecodeReadData(string readData, bool isChksum)
{
if (readData.Length >= 257 && readData[0] == 'R' && readData[1] == 'D')
{
DecodeErrorCode(readData.Substring(2, 2));
string rfidData = readData.Substring(4);
ExtractReadData(rfidData);
if (isChksum)
{
VerifyCheckSum(rfidData);
}
}
else
{
throw ExceptionRFID.Create(ErrorCodeRFID.INVALID_DATA);
}
}
private void OpenPort()
{
try
{
if (serialPort == null)
{
serialPort = new SerialPort(PortName);
}
else
{
if (serialPort.IsOpen)
{
serialPort.Close();
}
serialPort.PortName = PortName;
}
serialPort.BaudRate = BaudRate;
serialPort.DataBits = DataBits;
serialPort.Parity = Parity;
serialPort.StopBits = StopBits;
serialPort.ReadTimeout = ReadTimeOut;
serialPort.Encoding = Encoding.GetEncoding(28591); // 28591 = iso-8859-1 Western European (ISO)
serialPort.NewLine = "\r";
serialPort.Open();
if (serialPort.IsOpen)
{
serialPort.DiscardInBuffer();
serialPort.DiscardOutBuffer();
InitTagData();
}
else
{
throw ExceptionRFID.Create(ErrorCodeRFID.SerialPortOpenError, PortName);
}
}
catch
{
throw ExceptionRFID.Create(ErrorCodeRFID.SerialPortOpenError, PortName);
}
}
