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Direct ECU access via CAN FD

Dspace has extended its toolchain with more possibilities for using the CAN FD standard in rapid control prototyping (RCP).

(Photo: Dspace)

By supporting the XCP standard for CAN FD, Dspace allows for high-performance bypassing of electronic control units (ECUs) and network access with a higher bandwidth than with the Classic CAN. The company now also supports the CAN FD communication for ECU bypassing via XCP. Compared to traditional bypassing via CAN, this accelerates the synchronous exchange of larger data volumes between an ECU and an RCP system, such as the company’s MicroAutoBox II.

Since this method uses the existing CAN FD interfaces on ECUs and the Dspace RCP system, no additional hardware is needed. All user settings for implementing the bypassing model on the RCP system can be made with the RTI Bypass Blockset. This CAN FD support for bypassing gives customers a choice for selecting the ideal bypassing interface for their projects.

With the DCI-CAN2 communication interface, users can access ECU networks based on CAN or CAN FD conveniently from their PC. It uses the host PC’s USB interface to communicate with the ECU bus network. This way, CAN/CAN FD data can be monitored and visualized for analysis and diagnostics on the host PC by using the Bus Navigator in the company’s ControlDesk. The USB connector also powers the DCI-CAN2, so no other connectors are necessary to use the interface.

About external bypassing

External bypassing is an efficient method for developing new software functions and optimizing existing controller strategies. During external bypassing, a production ECU executes the existing controller strategies, while the newly developed functions run synchronously on the prototyping hardware. External bypassing provides flexibility during the design phase, since there are almost no resource constraints such as RAM, ROM, processor performance, or I/O channels. Real-time behavior is guaranteed even for complex bypassing functions. Any necessary sensors and actuators can be connected directly to the prototyping system. The company supports numerous interfaces for connecting the prototyping system to the ECU, such as CCP, XCP (on CAN, CAN FD, Flexray, Ethernet), and also supports access via the on-chip debug interface of the microcontroller.

Dspace develops and distributes integrated hardware and software tools for developing and testing electronic control units and mechatronic controls. The application areas for their systems are in the automotive industry, as well as in drives technology, aerospace, and other industrial sectors. The company's customer base includes virtually all major vehicle manufacturers and suppliers. With more than 1 200 employees worldwide, Dspace is located in Paderborn, Germany; has three project centers in Germany; and serves customers through local Dspace companies in the USA, the UK, France, Japan, and China.