protected void InitFilter(XBeeRequest request)
{
if (Filter == null)
{
Filter = request is AtCommand
? new AtResponseFilter((AtCommand)request)
: new PacketIdFilter(request);
}
else if (Filter is PacketIdFilter)
{
(Filter as PacketIdFilter).ExpectedPacketId = request.FrameId;
}
}
/// <summary>
/// Performs the necessary activities to construct an XBee packet from the frame data.
/// This includes: computing the checksum, escaping the necessary bytes, adding the start byte and length bytes.
/// The format of a packet is as follows:
/// start byte - msb length byte - lsb length byte - frame data - checksum byte
/// </summary>
/// <param name="request"></param>
public static byte[] GetBytes(XBeeRequest request)
{
var frameData = request.GetFrameData();
// packet size is frame data + start byte + 2 length bytes + checksum byte
var bytes = new byte[frameData.Length + 4];
bytes[0] = (byte)SpecialByte.StartByte;
// Packet length does not include escape bytes or start, length and checksum bytes
var length = (ushort)frameData.Length;
// msb length (will be zero until maybe someday when > 255 bytes packets are supported)
bytes[1] = UshortUtils.Msb(length);
// lsb length
bytes[2] = UshortUtils.Lsb(length);
Array.Copy(frameData, 0, bytes, 3, frameData.Length);
// set last byte as checksum
// note: if checksum is not correct, XBee won't send out packet or return error. ask me how I know.
bytes[bytes.Length - 1] = Checksum.Compute(frameData, 0, frameData.Length);
var preEscapeLength = bytes.Length;
// TODO save escaping for the serial out method. this is an unnecessary operation
bytes = EscapePacket(bytes);
var escapeLength = bytes.Length;
var packetStr = "Packet: ";
for (var i = 0; i < escapeLength; i++)
{
packetStr += ByteUtils.ToBase16(bytes[i]);
if (i < escapeLength - 1)
{
packetStr += " ";
}
}
Logger.LowDebug(packetStr);
Logger.LowDebug("pre-escape packet size is " + preEscapeLength + ", post-escape packet size is " + escapeLength);
return(bytes);
}
/// <summary>
/// Performs the necessary activities to construct an XBee packet from the frame data.
/// This includes: computing the checksum, escaping the necessary bytes, adding the start byte and length bytes.
/// The format of a packet is as follows:
/// start byte - msb length byte - lsb length byte - frame data - checksum byte
/// </summary>
/// <param name="request"></param>
public static byte[] GetBytes(XBeeRequest request)
{
var frameData = request.GetFrameData();
// packet size is frame data + start byte + 2 length bytes + checksum byte
var bytes = new byte[frameData.Length + 4];
bytes[0] = (byte)SpecialByte.StartByte;
// Packet length does not include escape bytes or start, length and checksum bytes
var length = (ushort)frameData.Length;
// msb length (will be zero until maybe someday when > 255 bytes packets are supported)
bytes[1] = UshortUtils.Msb(length);
// lsb length
bytes[2] = UshortUtils.Lsb(length);
Array.Copy(frameData, 0, bytes, 3, frameData.Length);
// set last byte as checksum
// note: if checksum is not correct, XBee won't send out packet or return error. ask me how I know.
bytes[bytes.Length - 1] = Checksum.Compute(frameData, 0, frameData.Length);
var preEscapeLength = bytes.Length;
//// TODO save escaping for the serial out method. this is an unnecessary operation
//bytes = EscapePacket(bytes);
//var escapeLength = bytes.Length;
//var packetStr = "Packet: ";
//for (var i = 0; i < escapeLength; i++)
//{
// packetStr += ByteUtils.ToBase16(bytes[i]);
// if (i < escapeLength - 1)
// packetStr += " ";
//}
//Logger.LowDebug(packetStr);
//Logger.LowDebug("pre-escape packet size is " + preEscapeLength + ", post-escape packet size is " + escapeLength);
return bytes;
}
protected void SendRequest(XBeeRequest request)
{
IsRequestSupported(request);
if (_addressLookupEnabled)
_currentRequest = request;
if (Logger.IsActive(LogLevel.Debug))
Logger.Debug("Sending " + request.GetType().Name + ": " + request);
var bytes = XBeePacket.GetBytes(request);
if (Logger.IsActive(LogLevel.LowDebug))
Logger.LowDebug("Sending " + ByteUtils.ToBase16(bytes));
_connection.Send(bytes);
}
protected void IsRequestSupported(XBeeRequest request)
{
// can be null when reading Config
if (Config == null)
return;
if (Config.IsSeries1() && request is IZigbeePacket)
throw new ArgumentException("You are connected to a Series 1 radio but attempting to send Series 2 requests");
if (Config.IsSeries2() && request is IWpanPacket)
throw new ArgumentException("You are connected to a Series 2 radio but attempting to send Series 1 requests");
}
public void SendNoReply(XBeeRequest request)
{
// we don't expect any response to this request
request.FrameId = PacketIdGenerator.NoResponseId;
SendRequest(request);
}
public RawRequest Send(XBeeRequest request)
{
_rawRequest.Init(request);
return _rawRequest;
}
public void BeginSend(XBeeRequest request, ResponseHandler responseHandler, IPacketFilter filter = null, int timeout = 5000)
{
AddPacketListener(new PacketListener(filter, timeout, responseHandler));
SendRequest(request);
}
public AsyncSendResult BeginSend(XBeeRequest request, IPacketFilter filter = null, int timeout = 5000)
{
var responseListener = new PacketListener(filter, timeout);
AddPacketListener(responseListener);
SendRequest(request);
return new AsyncSendResult(this, responseListener);
}
protected void InitFilter(XBeeRequest request)
{
if (Filter == null)
{
Filter = request is AtCommand
? new AtResponseFilter((AtCommand)request)
: new PacketIdFilter(request);
}
else if (Filter is PacketIdFilter)
{
(Filter as PacketIdFilter).ExpectedPacketId = request.FrameId;
}
}