public int Read(out Packet packet, out byte[] packet_data) { int packet_header_size = Marshal.SizeOf(typeof(Packet)); int packet_size = packet_header_size + 1024; byte[] buffer = new byte[packet_size]; ErrorCode error_code; int bytes_read; error_code = Reader.Read(buffer, 0, buffer.Length, 100, out bytes_read); if (error_code != ErrorCode.None) { throw new Exception(UsbDevice.LastErrorString); } if (bytes_read == 0) { throw new Exception(UsbDevice.LastErrorString); } byte[] packet_header_bytes = new byte[packet_header_size]; Array.Copy(buffer, packet_header_bytes, packet_header_size); packet = Protocol.ByteArrayToStructure <Packet>(packet_header_bytes); packet_data = new byte[packet.size]; Array.Copy(buffer, packet_header_size, packet_data, 0, packet.size); return(bytes_read); }
public static ProtocolDataType GetPacket(byte[] buffer) { return(Protocol.ByteArrayToStructure <ProtocolDataType>(buffer)); }
public static void GetCapability(GarminUnit garmin) { Packet p; bool done = false; p = Packet.CreatePacket(PacketType.Application, (ushort)Protocol.PacketID.ProductRequest, 0); garmin.Write(Protocol.StructureToByteArray <Packet>(p)); byte[] packet_data; while (!done && garmin.Read(out p, out packet_data) > 0) { switch (p.id) { case (ushort)Protocol.PacketID.ProductData: byte[] pdt_array = new byte[4]; Array.Copy(packet_data, pdt_array, 4); int pdt_descr_size = packet_data.Length - 4; byte[] pdt_descr_array = new byte[pdt_descr_size]; Product pdt = Protocol.ByteArrayToStructure <Product>(pdt_array); Array.Copy(packet_data, 4, pdt_descr_array, 0, pdt_descr_size); garmin.SetProductType(pdt, System.Text.ASCIIEncoding.ASCII.GetString(pdt_descr_array)); break; case (ushort)Protocol.PacketID.ExtProductData: var extended_data = System.Text.ASCIIEncoding.ASCII.GetString(packet_data); garmin.SetExtendedDescription(extended_data); break; case (ushort)Protocol.PacketID.ProtocolArray: int size = packet_data.Length / 3; ProtocolDataType[] data_types = new ProtocolDataType[size]; for (int i = 0; i < size; i++) { byte[] temp_buffer = new byte[3]; Array.Copy(packet_data, i * 3, temp_buffer, 0, 3); data_types[i] = ProtocolDataType.GetPacket(temp_buffer); } int j = 0; while (j < size) { switch (data_types[j].Tag) { case Tags.Phys_Prot_Id: garmin.SetCapability("protocol.physical", data_types[j].data); j++; break; case Tags.Link_Prot_Id: garmin.SetCapability("protocol.link", data_types[j].data); j++; break; case Tags.Appl_Prot_Id: application_protocol app = data_types[j].GetApplicationProtocol(); List <garmin_datatype> phys = new List <garmin_datatype>(); for (++j; j < size; j++) { if (data_types[j].Tag != Tags.Data_Type_Id) { Protocol.AssignProtocols(garmin, app, phys); break; } phys.Add(data_types[j].GetDataType()); } break; case Tags.Data_Type_Id: // taken care of in application protocol section break; default: j++; break; } } done = true; break; default: break; } } }