计算CRC检验

        /// <summary>
        /// 计算CRC检验
        /// </summary>
        /// <param name="value"></param>
        /// <param name="p"></param>
        /// <param name="iCRC"></param>
        /// <returns></returns>
        public static List<byte> CRC16(List<byte> value, ushort p = 0xA001, ushort iCRC = 0xFFFF)
        {
            // 运算
            ushort crc = iCRC;
            for (int i = 0; i < value.Count; i++)
            {
                crc = (ushort)(crc ^ (value[i]));
                for (int j = 0; j < 8; j++)
                {
                    crc = (crc & 1) != 0 ? (ushort)((crc >> 1) ^ p) : (ushort)(crc >> 1);
                }
            }
            byte h = (byte)((crc & 0xFF00) >> 8);
            byte l = (byte)(crc & 0x00FF);
            List<byte> buffer = new List<byte>();
            buffer.AddRange(value);
            buffer.Add(l);
            buffer.Add(h);
            return buffer;
        }