public void Assemble()
{
var data = new MemoryStream();
data.WriteByte((byte)XBeeSpecialBytes.StartByte);
var packetLength = BitConverter.GetBytes((ushort)frameData.Length);
Array.Reverse(packetLength);
data.WriteByte(packetLength[0]);
data.WriteByte(packetLength[1]);
data.Write(frameData, 0, frameData.Length);
data.WriteByte(XBeeChecksum.Calculate(frameData));
Data = data.ToArray();
}
public static XBeeFrame Unmarshal(byte[] packetData)
{
XBeeFrame frame;
var length = (uint)(packetData[0] << 8 | packetData[1]);
if ((length == 0) || (length > 0xFFFF))
{
throw new XBeeFrameException(String.Format("Invalid Frame Lenght {0}.", length));
}
if (length != packetData.Length - 3)
{
throw new XBeeFrameException(String.Format("Invalid Frame Lenght - Expecting {0}, received {1}.", length, packetData.Length - 3));
}
var checkData = packetData.Skip(2).ToArray();
if (!XBeeChecksum.Verify(checkData))
{
throw new XBeeFrameException("Invalid Frame Checksum.");
}
var dataStream = new MemoryStream(checkData.Take(checkData.Length - 1).ToArray());
var cmd = (XBeeAPICommandId)dataStream.ReadByte();
if (framesMap.ContainsKey(cmd))
{
frame = (XBeeFrame)Activator.CreateInstance(framesMap[cmd], new PacketParser(dataStream));
frame.Parse();
}
else
{
throw new XBeeFrameException(String.Format("Unsupported Command Id 0x{0:X2}", cmd));
}
return(frame);
}
