/// <summary>
/// Write the calibration blocks.
/// </summary>
private async Task <bool> Write(CancellationToken cancellationToken, byte[] image, WriteType writeType)
{
await this.vehicle.SendToolPresentNotification();
BlockType relevantBlocks;
switch (writeType)
{
case WriteType.Compare:
relevantBlocks = BlockType.All;
break;
case WriteType.TestWrite:
relevantBlocks = BlockType.Calibration;
break;
case WriteType.Calibration:
relevantBlocks = BlockType.Calibration;
break;
case WriteType.Parameters:
relevantBlocks = BlockType.Parameter;
break;
case WriteType.OsAndCalibration:
relevantBlocks = BlockType.Calibration | BlockType.OperatingSystem;
break;
case WriteType.Full:
// Overwriting parameter blocks would break the EBCM pairing,
// which is not what most users want. They just want a new OS
// and the calibration to go along with it.
//
// The cast seems redundant, but C# converts the enum values
// to ints when it does arithmetic.
relevantBlocks = (BlockType)(BlockType.All - BlockType.Parameter);
break;
default:
throw new InvalidDataException("Unsuppported operation type: " + writeType.ToString());
}
// Which flash chip?
await this.vehicle.SendToolPresentNotification();
await this.vehicle.SetDeviceTimeout(TimeoutScenario.ReadProperty);
Query <UInt32> chipIdQuery = this.vehicle.CreateQuery <UInt32>(
this.protocol.CreateFlashMemoryTypeQuery,
this.protocol.ParseFlashMemoryType,
cancellationToken);
Response <UInt32> chipIdResponse = await chipIdQuery.Execute();
if (chipIdResponse.Status != ResponseStatus.Success)
{
logger.AddUserMessage("Unable to determine which flash chip is in this PCM");
return(false);
}
// TODO: Move the device types lookup to a function in Misc/FlashChips.cs
// known chips in the P01 and P59
// http://ftp1.digi.com/support/documentation/jtag_v410_flashes.pdf
string Amd = "AMD"; // 0001
string Intel = "Intel"; // 0089
string I4471 = "28F400B5-B 512Kb"; // 4471
string A2258 = "Am29F800B 1Mbyte"; // 2258
string I889D = "28F800B5-B 1Mbyte"; // 889D
string unknown = "unknown"; // default case
logger.AddUserMessage("Flash memory ID code: " + chipIdResponse.Value.ToString("X8"));
switch ((chipIdResponse.Value >> 16))
{
case 0x0001: logger.AddUserMessage("Flash memory manufactuer: " + Amd);
break;
case 0x0089: logger.AddUserMessage("Flash memory manufactuer: " + Intel);
break;
default: logger.AddUserMessage("Flash memory manufactuer: " + unknown);
break;
}
switch (chipIdResponse.Value & 0xFFFF)
{
case 0x4471: logger.AddUserMessage("Flash memory type: " + I4471);
break;
case 0x2258: logger.AddUserMessage("Flash memory type: " + A2258);
break;
case 0x889D: logger.AddUserMessage("Flash memory type: " + I889D);
break;
default: logger.AddUserMessage("Flash memory type: " + unknown);
break;
}
await this.vehicle.SendToolPresentNotification();
IList <MemoryRange> ranges = FlashChips.GetMemoryRanges(chipIdResponse.Value, this.logger);
if (ranges == null)
{
return(false);
}
CKernelVerifier verifier = new CKernelVerifier(
image,
ranges,
this.vehicle,
this.protocol,
this.logger);
bool allRangesMatch = false;
bool writeAttempted = false;
for (int attempt = 1; attempt <= 5; attempt++)
{
if (await verifier.CompareRanges(
ranges,
image,
relevantBlocks,
cancellationToken))
{
allRangesMatch = true;
// Don't stop here if the user just wants to test their cable.
if (writeType == WriteType.TestWrite)
{
if (attempt == 1)
{
this.logger.AddUserMessage("Beginning test.");
}
}
else
{
this.logger.AddUserMessage("All ranges are identical.");
return(true);
}
}
if ((writeType == WriteType.TestWrite) && (attempt > 1))
{
// TODO: the app should know if any errors were encountered. The user shouldn't need to check.
this.logger.AddUserMessage("Test complete. Were any errors logged above?");
return(true);
}
// Stop now if the user only requested a comparison.
if (writeType == WriteType.Compare)
{
this.logger.AddUserMessage("Note that mismatched Parameter blocks are to be expected.");
this.logger.AddUserMessage("Parameter data can change every time the PCM is used.");
return(true);
}
writeAttempted = true;
// Erase and rewrite the required memory ranges.
await this.vehicle.SetDeviceTimeout(TimeoutScenario.Maximum);
foreach (MemoryRange range in ranges)
{
// We'll send a tool-present message during the erase request.
if ((range.ActualCrc == range.DesiredCrc) && (writeType != WriteType.TestWrite))
{
continue;
}
if ((range.Type & relevantBlocks) == 0)
{
continue;
}
this.logger.AddUserMessage(
string.Format(
"Processing range {0:X6}-{1:X6}",
range.Address,
range.Address + (range.Size - 1)));
if (writeType == WriteType.TestWrite)
{
this.logger.AddUserMessage("Pretending to erase.");
}
else
{
if (!await this.EraseMemoryRange(range, cancellationToken))
{
return(false);
}
}
if (writeType == WriteType.TestWrite)
{
this.logger.AddUserMessage("Pretending to write...");
}
else
{
this.logger.AddUserMessage("Writing...");
}
await this.vehicle.SendToolPresentNotification();
await WriteMemoryRange(
range,
image,
writeType == WriteType.TestWrite,
cancellationToken);
}
}
if (!writeAttempted)
{
this.logger.AddUserMessage("Assertion failed. WriteAttempted should be true.");
}
if (allRangesMatch)
{
this.logger.AddUserMessage("Flash successful!");
return(true);
}
this.logger.AddUserMessage("===============================================");
this.logger.AddUserMessage("THE CHANGES WERE -NOT- WRITTEN SUCCESSFULLY");
this.logger.AddUserMessage("===============================================");
if (writeType == WriteType.Calibration)
{
this.logger.AddUserMessage("Erasing Calibration to force recovery mode.");
this.logger.AddUserMessage("");
foreach (MemoryRange range in ranges)
{
if (range.Type == BlockType.Calibration)
{
await this.EraseMemoryRange(range, cancellationToken);
}
}
}
if (cancellationToken.IsCancellationRequested)
{
this.logger.AddUserMessage("");
this.logger.AddUserMessage("The operation was cancelled.");
this.logger.AddUserMessage("This PCM is probably not usable in its current state.");
this.logger.AddUserMessage("");
}
else
{
this.logger.AddUserMessage("This may indicate a hardware problem on the PCM.");
this.logger.AddUserMessage("We tried, and re-tried, and it still didn't work.");
this.logger.AddUserMessage("");
this.logger.AddUserMessage("Please start a new thread at pcmhacking.net, and");
this.logger.AddUserMessage("include the contents of the debug tab.");
this.RequestDebugLogs(cancellationToken);
}
return(false);
}
/// <summary>
/// This was used to test the kernel's CRC code.
/// </summary>
private async Task InvestigateCrc(CancellationToken cancellationToken)
{
IList <MemoryRange> ranges = FlashChips.GetMemoryRanges(0x00894471, this.logger);
logger.AddUserMessage("Requesting CRCs from PCM...");
foreach (MemoryRange range in ranges)
{
this.device.ClearMessageQueue();
bool success = false;
UInt32 crc = 0;
await this.device.SetTimeout(TimeoutScenario.ReadCrc);
// You might think that a shorter retry delay would speed things up,
// but 1500ms delay gets CRC results in about 3.5 seconds.
// A 1000ms delay resulted in 4+ second CRC responses, and a 750ms
// delay resulted in 5 second CRC responses. The PCM needs to spend
// its time caculating CRCs rather than responding to messages.
int retryDelay = 1500;
Message query = this.protocol.CreateCrcQuery(range.Address, range.Size);
for (int attempts = 0; attempts < 100; attempts++)
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
if (!await this.device.SendMessage(query))
{
await Task.Delay(retryDelay);
continue;
}
Message response = await this.device.ReceiveMessage();
if (response == null)
{
await Task.Delay(retryDelay);
continue;
}
Response <UInt32> crcResponse = this.protocol.ParseCrc(response, range.Address, range.Size);
if (crcResponse.Status != ResponseStatus.Success)
{
await Task.Delay(retryDelay);
continue;
}
success = true;
crc = crcResponse.Value;
break;
}
this.device.ClearMessageQueue();
if (!success)
{
this.logger.AddUserMessage("Unable to get CRC for memory range " + range.Address.ToString("X8") + " / " + range.Size.ToString("X8"));
continue;
}
range.ActualCrc = crc;
this.logger.AddUserMessage(
string.Format(
"Range {0:X6}-{1:X6} - Local: {2:X8} - PCM: {3:X8} - {4}",
range.Address,
range.Address + (range.Size - 1),
range.DesiredCrc,
range.ActualCrc,
range.Type));
}
}
