/// <summary>
    /// 位置信息汇报
    /// </summary>
    public class PositionFrame : BDBaseFrame
    {
        public PositionFrame()
        {
            FrameType = BDFrameType.Position;
        }
 
        /// <summary>
        /// 报警标志
        /// </summary>
        public UInt32 AlarmFlag { get; set; }
 
        /// <summary>
        /// 状态
        /// </summary>
        public UInt32 StatusFlag { get; set; }
 
        /// <summary>
        /// 纬度 DWORD 以度为单位的纬度值乘以 10 的 6 次方，精确到百万分之一度
        /// </summary>
        public double Lat { get; set; }
 
        /// <summary>
        /// 经度 DWORD 以度为单位的经度值乘以 10 的 6 次方，精确到百万分之一度
        /// </summary>
        public double Lng { get; set; }
 
        /// <summary>
        /// 高程 WORD 海拔高度，单位为米（m）
        /// </summary>
        public UInt16 Height { get; set; }
 
        /// <summary>
        /// 速度 WORD 1/10km/h
        /// </summary>
        public float Speed { get; set; }
 
        /// <summary>
        /// 方向 WORD 0-359，正北为 0，顺时针
        /// </summary>
        public UInt16 Direction { get; set; }
 
        /// <summary>
        /// 时间 BCD[6] YY-MM-DD-hh-mm-ss（GMT+8 时间，本标准中之后涉及的时间均采用此时区）
        /// </summary>
        public DateTime GpsDateTime { get; set; }
 
        public override void DecoderFrame(IByteBuffer byteBuffer)
        {
            base.DecoderFrame(byteBuffer);
 
            AlarmFlag = byteBuffer.ReadUnsignedInt();
            StatusFlag = byteBuffer.ReadUnsignedInt();
            Lat = byteBuffer.ReadUnsignedInt() / 1000000.0;
            Lng = byteBuffer.ReadUnsignedInt() / 1000000.0;
            Height = byteBuffer.ReadUnsignedShort();
            Speed = byteBuffer.ReadUnsignedShort() / 10.0f;
            Direction = byteBuffer.ReadUnsignedShort();
            //时间 BCD[6]
            byte[] bcdTime = new byte[6];
            byteBuffer.ReadBytes(bcdTime);
            string bcdTimeString = FrameHelper.Bcd2String(bcdTime);
            DateTime gpsTime;
            if (DateTime.TryParseExact(bcdTimeString, "yyMMddHHmmss", new CultureInfo("zh-CN", true), DateTimeStyles.None, out gpsTime))
                GpsDateTime = gpsTime;
            else
                GpsDateTime = new DateTime(2001, 1, 1, 0, 0, 0);
        }
 
 
        public override IByteBuffer EncoderContent()
        {
            IByteBuffer contentBuffer = Unpooled.Buffer(100, 1024);
            contentBuffer.WriteInt((int)AlarmFlag);
            contentBuffer.WriteInt((int)StatusFlag);
            contentBuffer.WriteInt((int)(Lat * 1000000));
            contentBuffer.WriteInt((int)(Lng * 1000000));
            contentBuffer.WriteUnsignedShort(Height);
            contentBuffer.WriteUnsignedShort((UInt16)(Speed * 10));
            contentBuffer.WriteUnsignedShort(Direction);
            //时间 BCD[6]
            byte[] timeBcdBuffer = FrameHelper.WriteBCDString(GpsDateTime.ToString("yyMMddHHmmss"));
            contentBuffer.WriteBytes(timeBcdBuffer);
            return contentBuffer;
        }
 
        public override string ToString()
        {
            return string.Format("通讯号:{0},时间:{1},经纬度{2}|{3},高度:{4},方向:{5}", TerminalPhone, GpsDateTime.ToString("yyyy-MM-dd HH:mm:ss"), Lng, Lat, Height, Direction);
        }
    }