private Address HandleAddress(IntelHexRecord hexRecord)
{
switch (hexRecord.RecordType)
{
case IntelHexRecordType.Data:
return(AddressBase + hexRecord.Address);
case IntelHexRecordType.ExtendedSegmentAddress:
if (IsLinear)
{
throw new IntelHexException($"Mixed segmented/linear address.", lineNum);
}
IsSegmented = true;
var seg = ((uint)hexRecord.Data ![0] << 8) | hexRecord.Data[1];
private Address HandleAddress(IntelHexRecord hexRecord)
{
switch (hexRecord.RecordType)
{
case IntelHexRecordType.Data:
return(AddressBase + hexRecord.Address);
case IntelHexRecordType.ExtendedSegmentAddress:
if (IsLinear)
{
throw new IntelHexException($"Mixed segmented/linear address.", lineNum);
}
IsSegmented = true;
var seg = ((uint)hexRecord.Data[0] << 8) | hexRecord.Data[1];
AddressBase = Address.SegPtr((ushort)seg, 0);
return(AddressBase);
case IntelHexRecordType.ExtendedLinearAddress:
if (IsSegmented)
{
throw new IntelHexException($"Mixed segmented/linear address.", lineNum);
}
IsLinear = true;
AddressBase = Address.Ptr32((((uint)hexRecord.Data[0] << 8) | hexRecord.Data[1]) << 16);
return(AddressBase);
case IntelHexRecordType.StartSegmentAddress:
if (IsLinear)
{
throw new IntelHexException($"Mixed segmented/linear address.", lineNum);
}
IsSegmented = true;
StartAddress = Address.SegPtr((ushort)((hexRecord.Data[0] << 8) | hexRecord.Data[1]),
(ushort)((hexRecord.Data[2] << 8) | hexRecord.Data[3]));
return(AddressBase);
case IntelHexRecordType.StartLinearAddress:
if (IsSegmented)
{
throw new IntelHexException($"Mixed segmented/linear address.", lineNum);
}
IsLinear = true;
StartAddress = Address.Ptr32(((uint)hexRecord.Data[0] << 24) | ((uint)hexRecord.Data[1] << 16) |
((uint)hexRecord.Data[2] << 8) | hexRecord.Data[3]);
return(AddressBase);
default:
throw new IntelHexException($"Unknown value read for [{nameof(hexRecord.RecordType)}]", lineNum);
}
}
/// <summary>
/// Parse a single Intel Hex32 hexadecimal record.
/// </summary>
/// <param name="hexRecord">The hexadecimal record as a string.</param>
/// <param name="lineNum">(Optional) The line number in the IHex32 binary stream.</param>
/// <returns>
/// An <see cref="IntelHexRecord"/> .
/// </returns>
/// <exception cref="IntelHex32Exception">Thrown whenever an error is found in the IHex32 record.</exception>
public static IntelHexRecord ParseRecord(string hexRecord, int lineNum = 0)
{
List <byte> ParseHexData()
{
try
{
return(Enumerable.Range(1, hexRecord.Length - 1)
.Where(i => (i & 1) != 0)
.Select(i => Convert.ToByte(hexRecord.Substring(i, 2), 16))
.ToList());
}
catch (Exception ex)
{
throw new IntelHexException($"Unable to parse hexedecimal numbers in Intel Hex line [{hexRecord}]", ex, lineNum);
}
}
if (hexRecord == null)
{
throw new IntelHexException("Intel Hex line can not be null.", lineNum);
}
if (hexRecord.Length < MinHexRecordSize)
{
throw new IntelHexException($"Intel Hex line [{hexRecord}] is less than {MinHexRecordSize} characters long.", lineNum);
}
if (hexRecord.Length % 2 == 0)
{
throw new IntelHexException($"Intel Hex line has an even number of characters [{hexRecord}].", lineNum);
}
if (!hexRecord.StartsWith(":"))
{
throw new IntelHexException($"Illegal Intel Hex line start character [{hexRecord}].", lineNum);
}
var hexData = ParseHexData();
if (hexData.Count != hexData[0] + 5)
{
throw new IntelHexException($"Intel Hex line [{hexRecord}] does not have required record length of [{hexData[0] + 5}].", lineNum);
}
if (!Enum.IsDefined(typeof(IntelHexRecordType), hexData[3]))
{
throw new IntelHexException($"Intel Hex line has an invalid/unsupported record type value: [{hexData[3]}].", lineNum);
}
if ((hexData.Sum(b => b) % 256) != 0)
{
throw new IntelHexException($"Checksum for Intel Hex line [{hexRecord}] is incorrect.", lineNum);
}
var rdr = new ByteImageReader(hexData.ToArray());
var datasize = rdr.ReadByte();
var newRecord = new IntelHexRecord
{
ByteCount = datasize,
Address = rdr.ReadBeUInt16(),
RecordType = (IntelHexRecordType)rdr.ReadByte(),
Data = rdr.ReadBytes(datasize).ToList(),
CheckSum = rdr.ReadByte()
};
return(newRecord);
}
