I've given the website a bit of an update so I can more easily post articles. I have maintained the existing content which was predominantly about Volkswagen/Audi group communication protocols and my ECU tuning software. Here is a quick overview.
This is a quick write-up of my understanding of the DTCs and switches in the Siemens PPD and SID803/SID803A/SID206 ECUs. I will be working with the PPD SN100L8000000 file from the sample BDM files.
DTC table entries
There is a table in each file which contains Diagnostic Trouble Codes (DTCs). If you view the table in hex you will see they match up with P-Codes i.e. codes for the powertrain.
VAG Blocks is open source (GPLv3) beta software for reading VAG group specific measuring blocks from an OBD-II port using an inexpensive ELM327 type adapter. Both Bluetooth and USB adapters have been tested on Windows & Linux. Sample rates of up to 12 samples per second have been achieved.
Various control modules are supported such as the engine ECU and gearbox. Values such as boost, oil temperature, DPF soot loading and current gear can be plotted in program and logged to a CSV file.