FAQ

Following you will find answers to frequently asked questions concerning our CCA product portfolio (Car Communication Analyzer).

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. The CCAs are characterized by high performance in demanding environments. A range of CCA models with different performance levels are available.

CCA data logger accessories include CCA Capture Units, Capture Modules, CCA removable data storage and CCA Copy Stations.

 

 

What makes CCA data loggers unique?

High bandwidth

Recording continuous data rates up to 25 Gbit/s makes the CCA data loggers a valuable part of your vehicle development.


Innovative data handling

The concept of easy-to remove data storage with up to 64 TB memory in combination with a Copy Station featuring up to 50 Gbit/s synchronization speed enables comfortable handling of the enormous amounts of data, that arises in todays world with the testing of advanced driver assistance systems having imaging sensors.


Flexibility

CCA data loggers are modular and allow a customized configuration on the 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 data from automotive bus systems of a vehicle will be merged into one data logger.


Synchronicity

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


Intuitive software user interface

The browser-based CCA software interface allows you to operate your CCA data logger from 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 in vehicle development and for the validation and qualification of driver assistance systems and automated driving functions. The CCAs are developed for use in vehicles, in laboratories and on test stands.

The CCA records the internal and external communication of ECUs and sensors on the various bus systems and provides this data with a common, synchronous time stamp. Thus, the complete data communication is clearly documented in its temporal processes and causalities become verifiable.

What are Capture Modules and Capture Units?

Capture Modules are external devices which can be connected to 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. With Capture Units the type and number of bus interfaces of the CCA 9002 or CCA 9003 data loggers can be varied project-specifically. Configuration and installation of the Capture Units takes place exclusively in the ViGEM factory in Germany.

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 CCA 9010 supports the time synchronization according to gPTP IEEE 802.1 AS. The resolution on the Ethernet ports E01 to E39 is 1Nanosecond. On the host Ethernet ports the resolution is in the order of hundreds of microseconds, only. On external interfaces for example CAN-FD, 1000baseT1, LVDS(GMSL/FPD), … which are handled by external probes; the timestamp is given by the probe which itself receives gPTP information from the CCA 9010.

The CCA 9010 itself can be slave to an external time master and it then distributes that time to all probes attached.

The CCA 9002/9003 series use an internal real-time clock (RTC) with a 64-bit counter. The time stamps have a resolution of 100 ns and a system-wide deviation of 1µs. The RTC maximum deviation is 1 minute per month. When messages arrive at the CCA or its capture units, the CCA records the 64-bit timestamp. The time stamps are assigned in the hardware by the FPGA of the CCA base system or the FPGAs of the Capture Units on reception of the first bit of a data frame. The accuracy of time stamps is ± 1 µs across the whole CCA.

The CCA 9002/9003 supports passive gPTP time synchronization, meaning the CCA records the gPTP information along its own time stamp so that the time difference can be calculated later.

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 after installation of the ViGEM dissector which can be obtained in our download center. . 
  • MDF 4.1: The MDF file format was specified by ASAM e.V. (Association for Standardisation of Automation and Measuring Systems). The CCA writes the MDF with extensions 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.
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The Software Suite CCA TOOLS contain 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. Please contact ViGEM for a list of applicable WiFi adapters.

 

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 read them! 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.