This is a C# project I worked on with my late Godfather, James "Walter" Boyle. He wrote some sophisticated software to handle analogue tachographs and report on working hours, compliance to speed limits, etc, and needed to add support for the digital tachograph system that was introduced in around 2002 (EEC 3821/85).
Usage is quite simple. There is a main class DataFileReader and two subclasses: VehicleUnitDataFile and DriverCardDataFile. You can create an instance of one of the sublasses using the following methods:
DataFile vudf=VehicleUnitDataFile.Create();
DataFile dcdf=DriverCardDataFile.Create();Once you have a reader instance you can give it a binary file to read and an XML Writer:
vudf.Process("file.ddd", writer);Or alternativly you can work with proccessed regions directly, like
vudf.Process(ddd);
var transferDataOverview = (IdentifiedObjectRegion)vudf.ProcessedRegions.Where(r => r.Name == "TransferDataOverview").First();
var vehicleIdentificationNumber = transferDataOverview.ProcessedRegions["VehicleIdentificationNumber"];By default signature validation is disabled, to enable:
Validator.ValidateSignatures = true;Now when processing file if there will any issue with validating signed data InvalidSignatureException will be thrown.
The project tachograph-reader.csproj is suitable for using with .NET Core and VScode, and contains a simple command line app. Run the command without args to scan ./data/vehicle and ./data/driver and process all files found.
Run the command with --driver
Most of the sections/features of both data file formats are catered for. It's possible to modify the data file formats using DriverCardData.config and VehicleUnitData.config. These are two XML files defining the structure of the data with features specific to the standard (such as cyclic buffer support).
The standard is not particularly well written and it took quite a bit of work to decipher it. This project encapsulates that learning in a reasonably succint form, mainly in the XML config files. Some code comments refer to pages in the specification 1360_2002-Annex_1B-GB.pdf which is available in this repository for convenience.
It's amusing that the authors of the standard went to great pains to fit the data in the space available on the cards of the time... a very cheap USB stick would now hold a lifetime's worth of driver data!
I created this project with the hope that someone would find it useful and clearly people have. There have been number of great pull requests and people are starting to think about v2 file format support (see issues).
If you have issues or questions, other developers may be able to help so please raise an issue. Even better, create your own pull request!
.Net5 support is enabled in net5 branch. Please, use that for any future development. The current master branch supports previous versions of .net.
Copyright (C) 2014-2020 Alfie Kirkpatrick
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