internal static ShortFrame CreateResetFrame()
{
var frame = new ShortFrame();
frame.ControlField = 0x40;
return(frame);
}
internal async Task <BaosFrame> SendResetFrame()
{
await WriteFrame(ShortFrame.CreateResetFrame());
ControlValueIndicator = true;
return(await ReadFrame());
}
private static int Serialize(ShortFrame frame, BinaryWriter writer)
{
writer.Write(frame.Start);
writer.Write((byte)frame.Control);
writer.Write(frame.Address);
writer.Write(frame.Crc);
writer.Write(frame.Stop);
return(5);
}
public INetworkPacket Deserialize(BinaryReader reader)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
INetworkPacket packet = null;
var start1 = reader.ReadByte();
switch (start1)
{
case Constants.MBUS_FRAME_ACK_START:
{
packet = new AckFrame();
}
break;
case Constants.MBUS_FRAME_SHORT_START:
{
//if (stream.Length != 5)
// return false;
if (start1 != Constants.MBUS_FRAME_SHORT_START)
{
return(packet);
}
var control = reader.ReadByte();
var address = reader.ReadByte();
var crc = reader.ReadByte();
if (crc != new byte[] { control, address }.CheckSum())
{
return(packet);
}
var stop = reader.ReadByte();
if (stop != Constants.MBUS_FRAME_STOP)
{
return(packet);
}
packet = new ShortFrame(control, address);
}
break;
case Constants.MBUS_FRAME_LONG_START:
{
const int MBUS_FRAME_FIXED_SIZE_LONG = 6;
var length1 = reader.ReadByte();
var length2 = reader.ReadByte();
if (length1 < 3)
{
return(packet);
}
if (length1 != length2)
{
return(packet);
}
//if (stream.Length < length1 + MBUS_FRAME_FIXED_SIZE_LONG)
// return false;
var start2 = reader.ReadByte();
if (start2 != Constants.MBUS_FRAME_LONG_START)
{
return(packet);
}
var control = reader.ReadByte();
var address = reader.ReadByte();
var controlInformation = reader.ReadByte();
var data = reader.ReadBytes(length1 - 3);
if (data.Length != length1 - 3)
{
return(packet);
}
var crc = reader.ReadByte();
var stop = reader.ReadByte();
if (crc != new byte[] { control, address, controlInformation }.Merge(data).CheckSum())
{
return(packet);
}
if (length1 - 3 == 0)
{
packet = new ControlFrame(control, controlInformation, address);
}
else if ((ControlInformation)controlInformation == ControlInformation.RESP_VARIABLE)
{
packet = new VariableDataLongFrame(control, controlInformation, address, data, length1);
}
else if ((ControlInformation)controlInformation == ControlInformation.RESP_FIXED)
{
packet = new FixedDataLongFrame(control, controlInformation, address, data, length1);
}
else
{
throw new NotImplementedException();
}
}
break;
}
return(packet);
}
