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CAN adapter

Identification of CAN-based ECUs

Whether in wiper-motors, grill shutters, or ambient-lighting: more and more automotive systems integrate electronics which operate via CAN interfaces. To control these components, restbus simulation is required.

The Baby-LIN devices are a family of LIN and CAN adapters (Photo: Lipowsky)

Lipowsky Industrie-Elektronik provides the Baby-LIN family, which is an array of systems especially designed for use in research laboratories, test departments and production (EOL applications). All Baby-LINs have already evolved to a second generation of devices, integrating different CPUs, more memory, and support for extended SDF V3. The SDF (Session Description File) is stored in the device and includes all information necessary for simulations. Even though the family name has stayed "Baby-LIN", three family members support CAN simulations in addition to LIN. To activate the CAN option, users require a voucher code, which can be bought separately.

Realizing higher communication protocols via the Baby-LIN DLL in a custom PC application has been possible for a while. To support stand-alone operations, the company recently extended the configuration options of SDF V3 in the field of diagnostic communications with protocol support. Answers from a specimen can thus be evaluated without the need for a PC. As a result, it is possible to call diagnostic sequences from a macro within the SDF. These can be used to query values like the hardware number or the software revision of bus nodes and compare them with stored values. If the queried values do not match the stored ones, it is possible to reject the specimen as NOK. This reduces the risk of incorrect installations.

Most ECUs also include an individual serial number, which can be retrieved via CAN or LIN communication. This offers an inexpensive option for product traceability besides bar code scanners or RFID readers.

Custom protocols like diagnostic transport layer (CAN: ISOTP, LIN: DTL), Unified Diagnostic Services (UDS), or Cooling can be defined directly within a SDF through multiple configuration options and executed through a macro call. Proprietary diagnostic protocols can also be implemented using the raw mode for frame formatting. The DTL/ISOTP formatting option requires only the definition of the payload. The device handles the segmentation and supplement of necessary transport information to the data.

Devices including CAN and LIN interfaces allow operating these busses concurrently. It's also possible to pass values from one bus to the other, thus allowing implementing standalone gateway functions between CAN/LIN or LIN/LIN busses. All Baby-LIN devices that support SDF V3 can be equipped with this protocol feature through an update of the firmware.

The field of activity of Lipowsky Industrie-Elektronik is the development and production of micro-controller equipped electronic units for automotive, industrial, and scientific applications. It is especially focused on LIN and CAN systems and real-time, multitasking applications. Automobile manufacturers and suppliers use the Baby-LIN products in test equipment for development, series monitoring, and service.


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Lipowsky I-Chin Motor Technology