コード例 #1
0
 public static bool TryParse(BinaryReader reader, out BinFileInfomation info)
 {
     info = new BinFileInfomation();
     try
     {
         var head = reader.ReadByte();
         info.TargetObject         = reader.ReadByte();
         info._binFileSize         = reader.ReadBytes(4);
         info._updateMode          = reader.ReadBytes(2);
         info._firmwareReleaseDate = reader.ReadBytes(6);
         info._firmwareVersion     = reader.ReadBytes(4);
         info._description         = reader.ReadBytes(233);
         info._binFileCheckSum     = reader.ReadBytes(2);
         info._describeCheckSum    = reader.ReadBytes(2);
         reader.ReadByte();
         var binfileBytes = reader.ReadBytes((int)(reader.BaseStream.Length - reader.BaseStream.Position));
         var binCheck     = BitConverter.GetBytes(CrcCheckSum.GetUsmbcrc16(binfileBytes, binfileBytes.Length));
         Array.Reverse(binCheck);
         if (!info._binFileCheckSum.ToArray().SequenceEqual(binCheck))
         {
             info = null;
             return(false);
         }
         var descCheck = new List <byte> {
             head, info.TargetObject
         };
         var binSize = new byte[4];
         info._binFileSize.CopyTo(binSize, 0);
         descCheck.AddRange(binSize);
         descCheck.AddRange(info._updateMode);
         descCheck.AddRange(info._firmwareReleaseDate);
         descCheck.AddRange(info._firmwareVersion);
         descCheck.AddRange(info._description);
         descCheck.AddRange(binCheck);
         var descCheckSum =
             BitConverter.GetBytes(CrcCheckSum.GetUsmbcrc16(descCheck.ToArray(), descCheck.Count));
         Array.Reverse(descCheckSum);
         if (!info._describeCheckSum.ToArray().SequenceEqual(descCheckSum))
         {
             info = null;
             return(false);
         }
     }
     catch (Exception)
     {
         info = null;
         return(false);
     }
     return(true);
 }
コード例 #2
0
        public override void DecodeFrame(byte[] buffer)
        {
            base.DecodeFrame(buffer);
            if (buffer.Length < BasicLength)
            {
                PackageStatus = PackageStatus.BufferHaveNoEnoughLength;
                return;
            }
            _decodeIndex = 0;
            if (buffer[_decodeIndex] != ProtocolHead)
            {
                PackageStatus = PackageStatus.InvalidHead;
                return;
            }
            _decodeIndex++;
            if (buffer[_decodeIndex] != CommandType)
            {
                PackageStatus = PackageStatus.ComponentError;
                return;
            }
            _decodeIndex++;
            if (buffer[_decodeIndex] != CommandByte)
            {
                PackageStatus = PackageStatus.ComponentError;
                return;
            }
            _decodeIndex++;
            OperateCode = buffer[_decodeIndex];
            _decodeIndex++;
            if (buffer[_decodeIndex] != RequestCode[0] || buffer[_decodeIndex + 1] != RequestCode[1])
            {
                PackageStatus = PackageStatus.ComponentError;
                return;
            }
            _decodeIndex += 2;
            var payloadDataLenth = buffer[_decodeIndex] << 8 | buffer[_decodeIndex + 1];

            _decodeIndex += 2;
            if (_decodeIndex + payloadDataLenth + 3 > buffer.Length)
            {
                PackageStatus = PackageStatus.BufferHaveNoEnoughLength;
                return;
            }
            PayloadData   = buffer.SubArray(_decodeIndex, payloadDataLenth);
            _decodeIndex += payloadDataLenth;
            CrcCheck      = buffer.SubArray(_decodeIndex, 2);
            if (CrcCheckSum.GetUsmbcrc16(buffer, _decodeIndex) != (CrcCheck[0] << 8 | CrcCheck[1]))
            {
                PackageStatus = PackageStatus.CrcCheckFaild;
                return;
            }
            _decodeIndex += 2;
            if (buffer[_decodeIndex] != ProtocolTail)
            {
                PackageStatus = PackageStatus.InvalidTail;
                return;
            }

            _statusCode = PayloadData[14];
            if (PayloadData.Length > 15)
            {
                Description = Encoding.GetEncoding("GBK").GetString(PayloadData, 15, PayloadData.Length - 15);
            }
            PackageStatus = PackageStatus.DecodeCompleted;
        }