private void QueryDTC()
{
GenericLoader loader = new GenericLoader();
loader.Text = "Querying DTCs";
loader.Show();
Application.DoEvents();
// fetch the base dtc value first
DTCContexts = Connection.ConnectionProtocol.ReportDtcsByStatusMask(Connection, Variant);
loader.SetProgressMax(DTCContexts.Count);
Application.DoEvents();
// query individual dtcs to retrieve the environment context
for (int j = 0; j < DTCContexts.Count; j++)
{
DTCContext dtcCtx = DTCContexts[j];
loader.Text = $"Querying DTC {dtcCtx.DTC.Qualifier} [{j + 1}/{DTCContexts.Count}]";
loader.SetProgressValue(j);
Application.DoEvents();
if (!Connection.ConnectionProtocol.GetDtcSnapshot(dtcCtx.DTC, Connection, out byte[] snapshot))
private void StartDownload()
{
int sumBytesTransferred = 0;
int sumBytes = 0;
foreach (FlashBlock block in FlashBlocks)
{
sumBytes += block.Payload.Length;
}
GenericLoader loader = new GenericLoader();
loader.Text = "Reading from ECU";
loader.TopMost = true;
loader.Show();
Application.DoEvents();
foreach (FlashBlock block in FlashBlocks)
{
byte[] startDownloadCmd = CreateDownloadRequest(block.Address, (uint)block.Payload.Length);
byte[] response = connection.SendMessage(startDownloadCmd); // comment this, uncomment below if dryrun
//byte[] response = BitUtility.BytesFromHex("74 20 00 03");
if (response.Length < 2)
{
MessageBox.Show($"Error: ECU sent an incorrectly sized response when initiating download for block {Path.GetFileNameWithoutExtension(block.Path)}");
break;
}
if (response[0] != startDownloadCmd[0] + 0x40)
{
MessageBox.Show($"Error: ECU sent a non-positive response ({BitUtility.BytesToHex(response)}) for block {Path.GetFileNameWithoutExtension(block.Path)}");
break;
}
// read alfid to know memory size description's width
byte rxAlfid = response[1];
// we are only expecting a size value
if ((rxAlfid & 0xF) > 0)
{
MessageBox.Show($"Error: Could not understand ECU ALFID response ({BitUtility.BytesToHex(response)}) for block {Path.GetFileNameWithoutExtension(block.Path)}");
break;
}
// find out how wide the memory size description is
int memSize = rxAlfid >> 4;
List <byte> memBytes = response.Skip(2).Take(memSize).ToList();
if (memBytes.Count != memSize)
{
MessageBox.Show($"Error: Could not understand ECU ALFID response (size mismatch) ({BitUtility.BytesToHex(response)}) for block {Path.GetFileNameWithoutExtension(block.Path)}");
break;
}
// parse the memory size desc as a BE integer
uint messageSize = 0;
for (int i = 0; i < memBytes.Count; i++)
{
messageSize <<= 8;
messageSize |= memBytes[i];
}
// debug: uncomment to cap msg size at 0x100, normally 0xF02, blocksize = 0xF00
// messageSize = 0x102;
int blockSize = (int)messageSize - 2;
int totalBlockCount = (int)(block.Payload.Length / blockSize);
int remainderBytes = block.Payload.Length % blockSize;
if (remainderBytes != 0)
{
totalBlockCount++;
}
// reconfigure connection for block transfer
connection.TesterPresentTimer.Enabled = false;
RaiseSTMin();
byte[] dataBlock = new byte[messageSize];
loader.SetProgressMax(totalBlockCount);
for (int blockCounter = 0; blockCounter < totalBlockCount; blockCounter++)
{
dataBlock[0] = 0x36;
dataBlock[1] = (byte)((blockCounter + 1) & 0xFF);
// if this is the last block, and there is a remainder block, write only the remainder
if (((blockCounter + 1) == totalBlockCount) && (remainderBytes != 0))
{
Array.ConstrainedCopy(block.Payload, blockCounter * blockSize, dataBlock, 2, remainderBytes);
dataBlock = dataBlock.Take(2 + remainderBytes).ToArray();
}
else
{
Array.ConstrainedCopy(block.Payload, blockCounter * blockSize, dataBlock, 2, blockSize);
}
byte[] transferResponse = connection.SendMessage(dataBlock); // comment this, uncomment below if dryrun
//byte[] transferResponse = new byte[] { 0x76, 0x00 };
if ((transferResponse.Length > 0) && (transferResponse[0] == 0x76))
{
// no need to check block index, if the ecu accepts it, continue
}
else
{
MessageBox.Show($"Error: Data transfer rejected by ECU ({BitUtility.BytesToHex(transferResponse)}) for block {Path.GetFileNameWithoutExtension(block.Path)}");
break;
}
// update progress
sumBytesTransferred += dataBlock.Length - 2;
// loader.Text = $"Writing to ECU : 0x{sumBytesTransferred:X8} of 0x{sumBytes:X8}";
loader.Text = $"Writing to ECU : block {blockCounter} of 0x{totalBlockCount}";
loader.SetProgressValue(blockCounter);
Application.DoEvents();
// fixme: show two progressbars, one for the block# and another for the individual block's %
}
byte[] exitTransferResponse = connection.SendMessage(new byte[] { 0x37 });// ------------------ patch if debugging
if (!((exitTransferResponse.Length > 0) && (exitTransferResponse[0] == 0x77)))
{
MessageBox.Show($"Error: Exit transfer rejected by ECU ({BitUtility.BytesToHex(exitTransferResponse)}) for block {Path.GetFileNameWithoutExtension(block.Path)}");
break;
}
}
// restore prior connection status
connection.TesterPresentTimer.Enabled = true;
ResetSTMin();
loader.Close();
MessageBox.Show("Download completed");
}
private void btnRead_Click(object sender, EventArgs e)
{
if (!FetchAndValidateInput(out uint sourceAddress, out uint destinationAddress, out uint bufferSize))
{
return;
}
int strideWidth = decimal.ToInt32(nudIOWidth.Value);
int addressWidth = decimal.ToInt32(nudAddressWidth.Value);
int ioDigitCount = GetMemoryDigitCount(strideWidth);
byte readCmd = decimal.ToByte(nudReadCmd.Value);
byte positiveResponse = (byte)(readCmd + 0x40);
byte alfid = GetAddressAndLengthFormatIdentifier(
addressWidth,
ioDigitCount
);
GenericLoader loader = new GenericLoader();
loader.Text = "Reading from ECU";
loader.SetProgressMax((int)(destinationAddress - sourceAddress));
loader.SetProgressValue(0);
loader.TopMost = true;
loader.Show();
Application.DoEvents();
byte[] memoryBuffer = new byte[bufferSize];
uint readCursor = sourceAddress;
int bufferCursor = 0;
bool hasBadReads = false;
while (readCursor < destinationAddress)
{
loader.Text = $"Reading from ECU : 0x{readCursor:X8}";
loader.SetProgressValue((int)(readCursor - sourceAddress));
Application.DoEvents();
uint remainder = destinationAddress - readCursor;
int readSize = strideWidth;
if (readSize > remainder)
{
readSize = (int)remainder;
}
List <byte> readCommand = CreateReadCommand(readCmd, alfid, readCursor, addressWidth, readSize);
byte[] response = Connection.SendMessage(readCommand);
if (response[0] == positiveResponse)
{
Array.ConstrainedCopy(response, 1, memoryBuffer, bufferCursor, readSize);
}
else
{
hasBadReads = true;
}
readCursor += (uint)readSize;
bufferCursor += readSize;
}
loader.Close();
Application.DoEvents();
OriginalBuffer = memoryBuffer;
Hexbox.LineInfoOffset = sourceAddress;
Hexbox.ByteProvider = new DynamicByteProvider(OriginalBuffer);
if (hasBadReads)
{
MessageBox.Show("One or more read requests were rejected by the ECU, and the empty blocks were substituted with zeros. \r\n\r\n" +
"Please check if the memory address is valid to the ECU, and if the ECU has been unlocked if required.\r\n\r\n" +
"If the memory region has protected bytes, consider loading a smaller, more specific range with a I/O width of 1 to skip past the protected bytes.",
"Warning: Invalid reads");
}
}
