public static void CreateUSBPacketByteArray(UsbPacketType packetType, Int16 packetId, Int32 dataSize, byte[] data, ref byte[] destinationArray)
{
/// TODO: The size of the array should not exceed device.packetsize. throw exception if it is
if (destinationArray == null)
{
// The USB Packet header (12 bytes) and data amounting to the size of the data buffer
destinationArray = new byte[GarminUSBConstants.PACKET_HEADER_SIZE + dataSize];
}
else
{
Array.Clear(destinationArray, 0, destinationArray.Length);
Array.Resize(ref destinationArray, GarminUSBConstants.PACKET_HEADER_SIZE + dataSize);
}
List <byte> bufferList = new List <byte>();
bufferList.Add((byte)packetType); // byte 0
bufferList.Add(new byte()); // byte 1
bufferList.AddRange(BitConverter.GetBytes(new Int16())); // byte 2 & 3
bufferList.AddRange(BitConverter.GetBytes(packetId)); // byte 4 & 5
bufferList.AddRange(BitConverter.GetBytes(new Int16())); // byte 6 & 7
bufferList.AddRange(BitConverter.GetBytes(dataSize)); // byte 8,9,10,11
if ((data != null) && (data.Length != 0))
{
bufferList.AddRange(data); // byte 12+
}
//Copy only the amount of bytes specified in dataSize
Buffer.BlockCopy(bufferList.ToArray(), 0, destinationArray, 0, destinationArray.Length);
}
public byte[] data; // byte 12+
public UsbPacket(UsbPacketType packetType, Int16 packetId, Int32 dataSize)
{
this.reserved1 = 0;
this.reserved2 = 0;
this.reserved3 = 0;
this.packetType = packetType;
this.packetId = packetId;
this.dataSize = dataSize;
this.data = new byte[dataSize];
}
public UsbPacket(UsbPacketType packetType, Int16 packetId, Int32 dataSize, byte[] data)
{
this.reserved1 = 0;
this.reserved2 = 0;
this.reserved3 = 0;
this.packetType = packetType;
this.packetId = packetId;
this.dataSize = dataSize;
this.data = new byte[dataSize];
Buffer.BlockCopy(data, 0, this.data, 0, dataSize);
}
