Plane.Sdk3/PlaneGcsSdk_Shared/CommunicationManagement/CommModuleGenerateMavLink.cs

using Plane.Copters;
using Plane.Protocols;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static Plane.Copters.PlaneCopter;

namespace Plane.CommunicationManagement
{
    public partial class CommModuleManager
    {
        public int packetcount = 0;
       

        /// <summary>
        /// 设置通道
        /// </summary>
        /// <param name="id"></param>
        /// <param name="ch1"></param>
        /// <param name="ch2"></param>
        /// <param name="ch3"></param>
        /// <param name="ch4"></param>
        /// <returns></returns>
        public async Task SetChannelsAsync(IEnumerable<ICopter> copters = null, ushort? ch1 = null, ushort? ch2 = null, ushort? ch3 = null, ushort? ch4 = null)
        {
            short copterId = 0;
            byte[] batchPacket = null;
            GetCopterIds(copters, out copterId, out batchPacket);
            
            byte[] packet = SetChannels(ch1, ch2, ch3, ch4);
            await WriteCommPacketAsync(copterId, MavComm.COMM_DOWNLOAD_COMM, packet, batchPacket).ConfigureAwait(false);
        }

        private byte[] SetChannels(ushort? ch1 = null, ushort? ch2 = null, ushort? ch3 = null, ushort? ch4 = null, ushort? ch5 = null, ushort? ch6 = null, ushort? ch7 = null, ushort? ch8 = null)
        {
            MAVLink.mavlink_rc_channels_override_t rc = new MAVLink.mavlink_rc_channels_override_t();
            rc.target_component = 1;
            rc.target_system = 1;
            rc.chan1_raw = ch1 ?? 1500;
            rc.chan2_raw = ch2 ?? 1500;
            rc.chan3_raw = ch3 ?? 1500;
            rc.chan4_raw = ch4 ?? 1500; 
            rc.chan5_raw = 1500;
            rc.chan6_raw = 1500;
            rc.chan7_raw = 1500;
            rc.chan8_raw = 1500;
            return GeneratePacket(MAVLink.MAVLINK_MSG_ID_RC_CHANNELS_OVERRIDE, rc);
        }

        public async Task<bool> WriteMissionListAsync(short id, List<IMission> missions)
        {
            missions.Insert(0, PLCopter.PRE_TAKE_OFF_MISSION);
            List<MAVLink.mavlink_mission_item_t> mission_list = new List<MAVLink.mavlink_mission_item_t>();
            foreach (IMission mission in missions)
            {
                var frame = mission.Command == FlightCommand.Waypoint && mission.Sequence == 0 ? MAVLink.MAV_FRAME.GLOBAL : MAVLink.MAV_FRAME.GLOBAL_RELATIVE_ALT;

                var req = new MAVLink.mavlink_mission_item_t();

                req.target_system = 1;
                req.target_component = 1;

                req.command = (byte)mission.Command;

                req.current = 0;
                req.autocontinue = 1;

                req.frame = (byte)frame;
                if (mission.Command == FlightCommand.LEDControl)
                {
                    req.x = mission.R;
                    req.y = mission.G;
                    req.z = mission.B;
                }
                else
                {
                    req.x = (float)mission.Latitude;
                    req.y = (float)mission.Longitude;
                    req.z = mission.Altitude;
                }

                req.param1 = mission.Param1;
                req.param2 = mission.Param2;
                req.param3 = mission.Param3;
                req.param4 = mission.Param4;

                req.seq = mission.Sequence;
                mission_list.Add(req);
            }

            bool result =  await MissionPacket(id, (byte)MavComm.COMM_DOWNLOAD_MODE, mission_list.ToArray());
            
            lock(MissinLocker)
            {
                if (missionWriteState.ContainsKey(id))
                {
                    missionWriteState[id].StateReturn = MissionErrorId;
                    missionWriteState[id].ErrorCode = ErrorCode;
                    missionWriteState[id].SendAchieved = result;
                    missionWriteState[id].WriteSucceed = false;
                }
                else
                {
                    CommWriteMissinState state = new CommWriteMissinState(result);
                    state.StateReturn = MissionErrorId;
                    state.ErrorCode = ErrorCode;
                    missionWriteState.Add(id, state);
                }
                return result;
            }
        }

        /// <summary>
        /// 开始任务
        /// </summary>
        public async Task DoMissionStartAsync(int hour_utc, int minute_utc, int second_utc, double Missionlng, double Missionlat)
        {
            byte[] packet = DoCommandAsync(MAVLink.MAV_CMD.MISSION_START, hour_utc, minute_utc, second_utc, (float)Missionlng, (float)Missionlat, 0, -1);
            await WriteCommPacketAsync(0, MavComm.COMM_DOWNLOAD_COMM, packet).ConfigureAwait(false);
        }

        /// <summary>
        /// 暂停任务
        /// </summary>
        public async Task DoMissionPauseAsync()
        {
            byte[] packet = DoCommandAsync(MAVLink.MAV_CMD.MISSION_START, 0, 0, 0, 0, 0, 1, 0);
            await WriteCommPacketAsync(0, MavComm.COMM_DOWNLOAD_COMM, packet).ConfigureAwait(false);
        }

        /// <summary>
        /// 恢复任务
        /// </summary>
        public async Task DoMissionResumeAsync(int hour_utc, int minute_utc, int second_utc)
        {
            byte[] packet = DoCommandAsync(MAVLink.MAV_CMD.MISSION_START, hour_utc, minute_utc, second_utc, 0, 0 , 2, 0);
            await WriteCommPacketAsync(0, MavComm.COMM_DOWNLOAD_COMM, packet).ConfigureAwait(false);
        }

        /// <summary>
        /// 解锁
        /// </summary>
        /// <param name="armit"></param>
        /// <returns></returns>
        public async Task UnlockAsync(IEnumerable<ICopter> copters = null)
        {
            short copterId = 0;
            byte[] batchPacket = null;
            GetCopterIds(copters,out copterId, out batchPacket);

            byte[] packet1 = SetChannels(1500, 1500, 1100, 1500);
            
            byte[] packet2 = SetModeAsync(FlightMode.ALT_HOLD);

            byte[] packet3 = DoARMAsync(true);

            byte[] data = packet1.Concat(packet2).Concat(packet3).ToArray();
            await WriteCommPacketAsync(copterId, MavComm.COMM_DOWNLOAD_COMM, data, batchPacket).ConfigureAwait(false);
        }

        /// <summary>
        /// LED闪烁白灯
        /// </summary>
        /// <param name="copters"></param>
        /// <returns></returns>
        public void LED_FlickerAsync(IEnumerable<ICopter> copters = null)
        {
            Task.Run(async () =>
            {
                short copterId = 0;
                byte[] batchPacket = null;
                GetCopterIds(copters, out copterId, out batchPacket);

                byte[] packet = DoLEDCommandAsync();
                await WriteCommPacketAsync(copterId, MavComm.COMM_DOWNLOAD_COMM, packet, batchPacket).ConfigureAwait(false);
            });
        }


        /// <summary>
        /// 设置参数
        /// </summary>
        /// <param name="paramname"></param>
        /// <param name="value"></param>
        /// <param name="copters"></param>
        /// <returns></returns>
        public async Task<int> SetParamAsync(string paramname, float value, IEnumerable<ICopter> copters = null)
        {
            short copterId = 0;
            byte[] batchPacket = null;
            GetCopterIds(copters, out copterId, out batchPacket);
           
            byte[] packet = SetParam2Async(paramname, value);
            int packetNum = packet[2];
            await WriteCommPacketAsync(copterId, MavComm.COMM_DOWNLOAD_COMM, packet, batchPacket).ConfigureAwait(false);
            return packetNum;
        }


        /// <summary>
        /// 读取参数
        /// </summary>
        /// <param name="paramname"></param>
        /// <param name="copters"></param>
        /// <returns></returns>
        public async Task ReadParamAsnyc(string paramname, IEnumerable<ICopter> copters = null)
        {
            short copterId = 0;
            byte[] batchPacket = null;
            GetCopterIds(copters, out copterId, out batchPacket);

            byte[] packet = GetParam2Async(paramname);
            await WriteCommPacketAsync(copterId, MavComm.COMM_DOWNLOAD_COMM, packet, batchPacket).ConfigureAwait(false);
        }

        /// <summary>
        /// 起飞测试
        /// </summary>
        /// <param name="alt"></param>
        /// <param name="copters"></param>
        /// <returns></returns>
        public async Task TakeOffAsync(float alt, IEnumerable<ICopter> copters = null)
        {
            short copterId = 0;
            byte[] batchPacket = null;
            GetCopterIds(copters, out copterId, out batchPacket);

            byte[] packet1 = SetModeAsync(FlightMode.GUIDED);

            byte[] packet2 = SetChannels(1500, 1500, 1500, 1500);

            byte[] packet3 = DoCommandAsync(MAVLink.MAV_CMD.TAKEOFF, 0, 0, 0, 0, 0, 0, alt);

            byte[] data = packet1.Concat(packet2).Concat(packet3).ToArray();
            await WriteCommPacketAsync(copterId, MavComm.COMM_DOWNLOAD_COMM, data, batchPacket).ConfigureAwait(false);
        }

        /// <summary>
        /// 返航
        /// </summary>
        /// <param name="copters"></param>
        /// <returns></returns>
        public async Task ReturnToLaunchAsync(IEnumerable<ICopter> copters = null)
        {
            short copterId = 0;
            byte[] batchPacket = null;
            GetCopterIds(copters, out copterId, out batchPacket);

            byte[] packet = SetModeAsync(FlightMode.RTL);
            await WriteCommPacketAsync((short)copterId, MavComm.COMM_DOWNLOAD_COMM, packet, batchPacket).ConfigureAwait(false);
        }


       

        /// <summary>
        /// 获取版本
        /// </summary>
        /// <param name="copters"></param>
        /// <returns></returns>
        public async Task GetVersionsAsync(IEnumerable<ICopter> copters = null)
        {
            short copterId = 0;
            byte[] batchPacket = null;
            GetCopterIds(copters, out copterId, out batchPacket);

            MAVLink.mavlink_sversion_request req = new MAVLink.mavlink_sversion_request();
            req.version = 0;
            byte[] packet = GeneratePacket(MAVLink.MAVLINK_MSG_ID_AUTOPILOT_VERSION_REQUEST, req);
            await WriteCommPacketAsync((short)copterId, MavComm.COMM_DOWNLOAD_COMM, packet, batchPacket).ConfigureAwait(false);
        }
        /// <summary>
        /// 降落
        /// </summary>
        /// <returns></returns>
        public async Task LandAsync(IEnumerable<ICopter> copters = null)
        {
            short copterId = 0;
            byte[] batchPacket = null;
            GetCopterIds(copters, out copterId, out batchPacket);

            byte[] packet = SetModeAsync(FlightMode.LAND);
            await WriteCommPacketAsync((short)copterId, MavComm.COMM_DOWNLOAD_COMM, packet, batchPacket).ConfigureAwait(false);
        }

        /// <summary>
        /// 加锁
        /// </summary>
        /// <param name="armit"></param>
        /// <returns></returns>
        public async Task LockAsync(IEnumerable<ICopter> copters = null)
        {
            short copterId = 0;
            byte[] batchPacket = null;
            GetCopterIds(copters, out copterId, out batchPacket);

            byte[] packet1 = SetChannels(1500, 1500, 1100, 1500);
          
            byte[] packet2 = DoARMAsync(false);

            byte[] data = packet1.Concat(packet2).ToArray();
            await WriteCommPacketAsync((short)copterId, MavComm.COMM_DOWNLOAD_COMM, data, batchPacket).ConfigureAwait(false);
        }

        /// <summary>
        /// 测试电机
        /// </summary>
        /// <param name="motor"></param>
        /// <returns></returns>
        public async Task MotorTestAsync(IEnumerable<ICopter> copters = null)
        {
            short copterId = 0;
            byte[] batchPacket = null;
            GetCopterIds(copters, out copterId, out batchPacket);

            //1-4代表1-4电机
            byte[] data1 = DoMotorTestAsync(1, MAVLink.MOTOR_TEST_THROTTLE_TYPE.MOTOR_TEST_THROTTLE_PERCENT, 5, 5);
            byte[] data2 = DoMotorTestAsync(2, MAVLink.MOTOR_TEST_THROTTLE_TYPE.MOTOR_TEST_THROTTLE_PERCENT, 5, 5);
            byte[] data3 = DoMotorTestAsync(3, MAVLink.MOTOR_TEST_THROTTLE_TYPE.MOTOR_TEST_THROTTLE_PERCENT, 5, 5);
            byte[] data4 = DoMotorTestAsync(4, MAVLink.MOTOR_TEST_THROTTLE_TYPE.MOTOR_TEST_THROTTLE_PERCENT, 5, 5);

            byte[] data = data1.Concat(data2).Concat(data3).Concat(data4).ToArray();
            await WriteCommPacketAsync(copterId, MavComm.COMM_DOWNLOAD_COMM, data, batchPacket);
        }

        /// <summary>
        /// 悬停
        /// </summary>
        /// <returns></returns>
        public async Task HoverAsync(IEnumerable<ICopter> copters = null)
        {
            short copterId = 0;
            byte[] batchPacket = null;
            GetCopterIds(copters, out copterId, out batchPacket);

            byte[] packet1 = SetChannels(1500, 1500, 1500, 1500);

            byte[] packet2 = SetModeAsync(FlightMode.LOITER);

            byte[] data = packet1.Concat(packet2).ToArray();
            await WriteCommPacketAsync((short)copterId, MavComm.COMM_DOWNLOAD_COMM, data, batchPacket).ConfigureAwait(false);
        }

        /// <summary>
        /// 手动
        /// </summary>
        /// <param name="copters"></param>
        /// <returns></returns>
        public async Task FloatAsync(IEnumerable<ICopter> copters = null)
        {
            short copterId = 0;
            byte[] batchPacket = null;
            GetCopterIds(copters, out copterId, out batchPacket);

            byte[] packet = SetModeAsync(FlightMode.ALT_HOLD);
            await WriteCommPacketAsync(copterId, MavComm.COMM_DOWNLOAD_COMM, packet, batchPacket).ConfigureAwait(false);
        }

        /// <summary>
        /// 校准加速计
        /// </summary>
        /// <param name="copterId"></param>
        /// <returns></returns>
        public async Task DoStartPreflightCompassAsync(short copterId)
        {
            byte[] packet = DoCommandAsync(MAVLink.MAV_CMD.PREFLIGHT_CALIBRATION, 0, 0, 0, 0, 1, 0, 0);
            await WriteCommPacketAsync(copterId, MavComm.COMM_DOWNLOAD_COMM, packet).ConfigureAwait(false);
        }

        /// <summary>
        /// 校准加速计下一步
        /// </summary>
        /// <param name="copterId"></param>
        /// <returns></returns>
        public async Task DoNextPreflightCompassAsync(short copterId)
        {
            MAVLink.mavlink_command_ack_t req = new MAVLink.mavlink_command_ack_t();
            req.command = 1;
            req.result = 1;

            byte[] packet = GeneratePacket(MAVLink.MAVLINK_MSG_ID_COMMAND_ACK, req);
            await WriteCommPacketAsync(copterId, MavComm.COMM_DOWNLOAD_COMM, packet).ConfigureAwait(false);
        }

        /// <summary>
        /// 校准指南针
        /// </summary>
        /// <param name="copterId"></param>
        /// <returns></returns>
        public async Task DoCalibrationCompassAsync(short copterId)
        {
            byte[] packet = DoCommandAsync(MAVLink.MAV_CMD.DO_START_MAG_CAL, 0, 1, 1, 0, 0, 0, 0);
            await WriteCommPacketAsync(copterId, MavComm.COMM_DOWNLOAD_COMM, packet).ConfigureAwait(false);
        }

        /// <summary>
        /// 放弃校准指南针
        /// </summary>
        /// <param name="copterId"></param>
        /// <returns></returns>
        public async Task DoCancelCalibrationCompassAsync(short copterId)
        {
            byte[] packet = DoCommandAsync(MAVLink.MAV_CMD.DO_CANCEL_MAG_CAL, 0, 0, 1, 0, 0, 0, 0);
            await WriteCommPacketAsync(copterId, MavComm.COMM_DOWNLOAD_COMM, packet).ConfigureAwait(false);
        }

        public async Task DoAcceptCalibrationCompassAsync(short copterId)
        {
            byte[] packet = DoCommandAsync(MAVLink.MAV_CMD.DO_ACCEPT_MAG_CAL, 0, 0, 1, 0, 0, 0, 0);
            await WriteCommPacketAsync(copterId, MavComm.COMM_DOWNLOAD_COMM, packet).ConfigureAwait(false);
        }

        private byte[] SetModeAsync(FlightMode mode)
        {
            return SetModeAsync(mode.ToAC2Mode());
        }

        private byte[] DoARMAsync(bool armit)
        {
            return DoCommandAsync(MAVLink.MAV_CMD.COMPONENT_ARM_DISARM, armit ? 1 : 0, 21196, 0, 0, 0, 0, 0);
        }

        private byte[] DoMotorTestAsync(int motor, MAVLink.MOTOR_TEST_THROTTLE_TYPE thr_type, int throttle, int timeout)
        {
            return DoCommandAsync(MAVLink.MAV_CMD.DO_MOTOR_TEST, (float)motor, (float)(byte)thr_type, (float)throttle, (float)timeout, 0, 0, 0);
        }

        private byte[] DoCommandAsync(MAVLink.MAV_CMD actionid, float p1, float p2, float p3, float p4, float p5, float p6, float p7)
        {
            MAVLink.mavlink_command_long_t req = new MAVLink.mavlink_command_long_t();

            req.target_system = 1;
            req.target_component = 1;
            if (actionid == MAVLink.MAV_CMD.COMPONENT_ARM_DISARM)
            {
                req.target_component = (byte)MAVLink.MAV_COMPONENT.MAV_COMP_ID_SYSTEM_CONTROL;
            }
            req.command = (ushort)actionid;
            req.param1 = p1;
            req.param2 = p2;
            req.param3 = p3;
            req.param4 = p4;
            req.param5 = p5;
            req.param6 = p6;
            req.param7 = p7;
            
            return GeneratePacket(MAVLink.MAVLINK_MSG_ID_COMMAND_LONG, req); ;
        }

        private byte[] GeneratePacket<TMavlinkPacket>(byte messageType, TMavlinkPacket indata)
        {
            byte[] data;
            data = MavlinkUtil.StructureToByteArray(indata);
            byte[] packet = new byte[data.Length + 6 + 2];
            packet[0] = MAVLink.MAVLINK_STX;
            packet[1] = (byte)(data.Length);
            packet[2] = (byte)packetcount;
            packetcount++;
            packet[3] = 255; // this is always 255 - MYGCS
            packet[4] = (byte)MAVLink.MAV_COMPONENT.MAV_COMP_ID_MISSIONPLANNER;
            packet[5] = messageType;

            int i = 6;
            foreach (byte b in data)
            {
                packet[i] = b;
                i++;
            }
            ushort checksum = MavlinkCRC.crc_calculate(packet, packet[1] + 6);
            checksum = MavlinkCRC.crc_accumulate(MAVLink.MAVLINK_MESSAGE_CRCS[messageType], checksum);

            byte ck_a = (byte)(checksum & 0xFF); ///< High byte
            byte ck_b = (byte)(checksum >> 8); ///< Low byte
            packet[i] = ck_a;
            i += 1;
            packet[i] = ck_b;
            i += 1;

            return packet;
        }


        private byte[] SetModeAsync(ac2modes modein)
        {
            try
            {
                MAVLink.mavlink_set_mode_t mode = new MAVLink.mavlink_set_mode_t();

                if (TranslateMode(modein, ref mode))
                {
                    return SetModeAsync(mode);
                }
            }
            catch { }
            return null;
        }

        private byte[] SetModeAsync(MAVLink.mavlink_set_mode_t mode, MAVLink.MAV_MODE_FLAG base_mode = 0)
        {
            mode.base_mode |= (byte)base_mode;
            return GeneratePacket(MAVLink.MAVLINK_MSG_ID_SET_MODE, mode);
        }

        private bool TranslateMode(ac2modes modein, ref MAVLink.mavlink_set_mode_t mode)
        {
            mode.target_system = 1;
            switch (modein)
            {
                case ac2modes.STABILIZE:
                case ac2modes.AUTO:
                case ac2modes.RTL:
                case ac2modes.LOITER:
                case ac2modes.ACRO:
                case ac2modes.ALT_HOLD:
                case ac2modes.CIRCLE:
                case ac2modes.POSITION:
                case ac2modes.LAND:
                case ac2modes.OF_LOITER:
                case ac2modes.GUIDED:
                    mode.base_mode = (byte)MAVLink.MAV_MODE_FLAG.CUSTOM_MODE_ENABLED;
                    mode.custom_mode = (uint)modein;
                    break;
                default:
                    return false;
            }
            return true;
        }


        /// <summary>
        ///广播Rtk
        /// </summary>
        /// <param name="data"></param>
        /// <param name="length"></param>
        /// <returns></returns>
        public async Task InjectGpsDataAsync(byte[] data, ushort length)
        {
            MAVLink.mavlink_gps_inject_data_t gps = new MAVLink.mavlink_gps_inject_data_t();
            var msglen = 110;
            int datalen = 0;
            var len = (length % msglen) == 0 ? length / msglen : (length / msglen) + 1;
            for (int a = 0; a < len; a++)
            {
                datalen = Math.Min(length - a * msglen, msglen);
                gps.data = new byte[msglen];
                Array.Copy(data, a * msglen, gps.data, 0, datalen);
                gps.len = (byte)datalen;
                gps.target_component = 1;
                gps.target_system = 1;
                byte[] packet = GenerateRTKPacketAsync(MAVLink.MAVLINK_MSG_ID_GPS_INJECT_DATA, gps, gps.len);
                await WriteCommPacketAsync(0, MavComm.COMM_DOWNLOAD_COMM, packet).ConfigureAwait(false);
            }
        }

    

        public byte[] GenerateRTKPacketAsync<TMavlinkPacket>(byte messageType, TMavlinkPacket indata, int rtklength)
        {
            byte[] data;
            int rtkdataleng = rtklength + 3;

            data = MavlinkUtil.StructureToByteArray(indata);

            byte[] packet = new byte[rtkdataleng + 6 + 2];

            packet[0] = MAVLink.MAVLINK_STX;
            packet[1] = (byte)(rtkdataleng);
            packet[2] = (byte)packetcount;
            packetcount++;
            packet[3] = 255; // this is always 255 - MYGCS
            packet[4] = (byte)MAVLink.MAV_COMPONENT.MAV_COMP_ID_MISSIONPLANNER;
            packet[5] = messageType;

            int i = 6;
            foreach (byte b in data)
            {
                if (i < rtkdataleng + 6)
                    packet[i] = b;
                else break;
                i++;
            }

            ushort checksum = MavlinkCRC.crc_calculate(packet, packet[1] + 6);

            checksum = MavlinkCRC.crc_accumulate(MAVLink.MAVLINK_MESSAGE_CRCS[messageType], checksum);

            byte ck_a = (byte)(checksum & 0xFF); ///< High byte
            byte ck_b = (byte)(checksum >> 8); ///< Low byte

            packet[i] = ck_a;
            i += 1;
            packet[i] = ck_b;
            i += 1;

            return packet;
        }

        
        private byte[] SetParam2Async(string paramname, float value)
        {
            // param type is set here, however it is always sent over the air as a float 100int = 100f.
            var req = new MAVLink.mavlink_param_set_t { target_system = 1, target_component = 1, param_type = 4 };

            byte[] temp = Encoding.GetEncoding("ASCII").GetBytes(paramname);

            Array.Resize(ref temp, 16);
            req.param_id = temp;
            req.param_value = (value);

            return GeneratePacket((byte)MAVLink.MAVLINK_MSG_ID_PARAM_SET, req);
        }

        private byte[] GetParam2Async(string paramname)
        {
            var paramId = Encoding.ASCII.GetBytes(paramname);
            Array.Resize(ref paramId, 16);

            var req = new MAVLink.mavlink_param_request_read_t
            {
                param_index = -1,
                target_system = 1,
                target_component = 1,
                param_id = paramId
            };

            return GeneratePacket(MAVLink.MAVLINK_MSG_ID_PARAM_REQUEST_READ, req);
        }

        private byte[] DoLEDCommandAsync()
        {
            MAVLink.mavlink_msg_id_led_control led = new MAVLink.mavlink_msg_id_led_control();
            led.target_system = 1;
            led.target_component = 1;//(byte)MAVLink.MAV_COMPONENT.MAV_COMP_ID_SYSTEM_CONTROL;;
            led.instance = 0;
            led.pattern = 0;
            led.custom_len = 4;
            led.custom_bytes = new byte[24];
            led.custom_bytes[0] = 255;
            led.custom_bytes[1] = 255;
            led.custom_bytes[2] = 255;
            led.custom_bytes[3] = 3;

            return GeneratePacket(MAVLink.MAVLINK_MSG_ID_LED_CONTROL, led);
        }

        private byte[] BatchCopterIdData(IEnumerable<ICopter> copters)
        {
            byte[] BatchByte = null;
            List<ICopter> copterList = copters.OrderBy(c=>int.Parse(c.Id)).ToList();
            for (int i = 0; i < copterList.Count; i++)
            {
                byte[] tempByte;
                int id = int.Parse(copterList[i].Id);
                int count = 1;
                while(i+1 < copterList.Count && int.Parse(copterList[i + 1].Id) == id + count)
                {
                    count++;
                    i++;
                }

                if (count == 1)
                {
                    short curId = (short)(0 << 12 ^ id);
                    tempByte = BitConverter.GetBytes(curId);
                }
                else
                {
                    short beginId = (short)(2 << 12 ^ id);
                    tempByte = BitConverter.GetBytes(beginId);

                    short numCount = (short)(4 << 12 ^ count);
                    tempByte = tempByte.Concat(BitConverter.GetBytes(numCount)).ToArray();
                }

                if (BatchByte == null)
                    BatchByte = tempByte;
                else
                    BatchByte = BatchByte.Concat(tempByte).ToArray();
            }
            return BatchByte;
        }

        private void GetCopterIds(IEnumerable<ICopter> copters, out short copterId, out byte[] batchPacket)
        {
            copterId = 0;
            batchPacket = null;

            if (copters != null)
            {
                if (copters.Count() == 1)
                    copterId = short.Parse(copters.FirstOrDefault().Id);
                else
                {
                    batchPacket = BatchCopterIdData(copters);
                }
            }
        }
    }
}