FAQ

Here you will find answers to frequently asked questions.

What is a CCA?

CCA is the abbreviation of Car Communication Analyzer. A CCA is a requirement-specific, configurable high-end data logger. CCAs ensure lossless archiving of all control data of the entire vehicle communication in real time. They are characterized by high performance with small dimensions. Different CCA models with different performance data are available.
 

For CCA data loggers there is a range of accessories available such as CCA Capture Units, Capture Modules, CCA removable data storages and CCA Copy Stations.
 

What makes CCA data loggers unique?

High bandwidth

Recording data rates up to 25 Gbit/s make the CCA data loggers currently unique in the market of mobile, automotive appropriate data logger.

 

Innovative data handling

The concept of removable data storage with up to 64 TB memory in combination with a Copy Station featuring upt to 50 Gbit/s synchronization speed enables the comfortable handling of the enormous amounts of data that today arise in the testing of advanced driver assistance systems having imaging sensors.

 

Flexibility

CCA data loggers are modular and allow a customized configuration on the respective specific application. If something is missing, we develop it together with you.

 

Sustainability

The modular configuration of a CCA data logger can also be retrofitted to adapt to new projects and requirements.

 

All-in-One

All automotive bus systems of a vehicle will be merged into one data logger.

 

Synchronicity

All incoming data received a common, synchronous time stamp with 100 ns resolution.

 

Intuitive operating software

The browser-based CCA software is up-to-date. Operate your CCA data logger with your PC, tablet or smartphone without installing drivers and tools and without license model for use, updates and upgrades.

 

For which applications CCA data loggers are intended?

CCA data loggers are used close to development for the validation and qualification of driver assistance systems and autonomous driving functions. They are developed for use in vehicles, in laboratories and on test stands.

 

They record the internal and external communication of ECUs and sensors on the various bus systems and to provide this data with a common, synchronous time stamp. Thus, the complete data communication is clearly documentated in its temporal processes and causalities become verifiable.

 

What are Capture Modules and Capture Units?

Capture Modules are external devices which can be connected with CCA 9010 data loggers to enlarge the type and number of bus interfaces.

 

Capture Units are plug-in modules for the data logger models CCA 9002 and CCA 9003. They combine a number of bus interfaces. With Capture Units the type and number of interfaces of CCA 9002 or CCA 9003 data loggers can be varied project-specifically. Configuration and installation of the Capture Units takes place exclusively in the factory.

 

The modular CCA system architecture of the CCA data loggers allows easy integration of Capture Units / Modules to be developed in the future. If bus interfaces are missing, we will develop an optimal solution for your application.

 

Is it possible to retrofit or replace Capture Units?

Depending on the choice of CCA model, various Capture Units are available for your special requirements. In addition, tailor-made configurations make the use of the modular CCA product portfolio extremely flexible. We are happy to adapt to new projects and requirements at the ViGEM factory. Simply contact our technical experts.

 

What about time stamps?

The recorded communication of the various bus systems is provided with common synchronous time stamps.

The time stamps are assigned hardware-side by the FPGA of the CCA base data logger respectively the FPGAs of the Capture Units with the receipt of the first bit of a data frame. The accuracy of the time stamp is ± 1 µs for the entire system (CCA base data logger with different CCA Capture Units). The resolution is 100 ns. The CCA supports gPTP time synchronization.

 

In which format do CCA data loggers store the incoming data?

The CCA supports different storage formats for individual bus interfaces or interface groups. Incoming data can be stored in the following file formats:

 

  • PCAP: The standard format of the freeware Wireshark can only contain Ethernet UDP messages.
  • VPCAP: The VPCAP format differs by an additional header from the standard Wireshark format PCAP. This header enables to save not only Ethernet UDP messages (as with PCAP), but also save messages of other automotive buses (CAN, FlexRay, etc.). VPCAP is readable with Wireshark
  • MDF 4.1: The MDF file format was specified by ASAM e.V. (Association for Standardisation of Automation and Measuring Systems). The CCA writes a MDF variant specified by ViGEM. The specification can be downloaded from the ViGEM Download Center.
  • ADTF DAT: The DAT file format was specified by Elektrobit Automotive. The data logger models CCA 9002 and CCA 9003 can write a DAT variant specified by ViGEM. The specification can be downloaded from the ViGEM Download Center.

 

The Software Suite CCA TOOLS contains the software CCA Converter, which allows conversion of the VPCAP format to other formats such as:

 

  • Vector ASC
  • Vector BLF
  • MOST Data Analyser (img file)
  • VPCAP
  • PCAP (Ethernet only)
  • Telemotive ASCII
  • TXT (RS232 and Ethernet only)
  • MP4 (video stream only)
  • AUTOSAR DLT (default)
  • ADTF DAT
  • MDF 4

 

How is the recorded data stored onto the removable data storage?

The recorded data is bundled and saved in files.

A new directory is created for every recording session and every writer. Files are created within this directory. In addition, a meta file is created (with the “.vci” extension) that contains a description of the recording. By default, every directory name starts with the name of the CCA data logger and ends with the date and starting time of the recording session.

 

Can CCA data loggers be cascaded?

Yes, this has the following advantages: More available ports, even higher data rates and even more storage space.

One CCA is the timer (master), the other CCA is the timekeeper (slave). When master and slave are started, the master sets the date and time for the slave every 500 µs. The difference between the two times is maximum 1 µs.

The recorded data can be merged with the CCA Converter. The software is free to download in the Downloads area of the ViGEM website. The CCA Converter is available with a GUI as well as a command line tool.

 

Is a WLAN connection with a CCA possible?

Yes, a WLAN connection as a client can be realized with an external USB WiFi adapter.

 

Where can I find current data sheets or software and firmware releases for the CCA system family?

This and more can be found in the Downloads area of the ViGEM website. Please sign up to take advantage of this ViGEM service.

 

What are CCA Safety Instructions?

The document "CCA Safety Instructions" contains important information that is required for the reliable, safe and correct operation of the Car Communication Analyzer. Please note these. If you have any questions, please contact ViGEM GmbH. The CCA safety instructions can be downloaded as a registered user in the Downloads area of the ViGEM website.