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);
}
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;
}
