dSPACE Enables Direct ECU Access via CAN FD

Use a much higher bandwidth compared to classic CAN

Paderborn, (PresseBox) -
High-performance ECU bypassing via XCP on CAN FD
Higher data throughput for host access to ECU networks

dSPACE has extended its comprehensive tool chain with even more possibilities for using the latest CAN FD data bus standard in rapid control prototyping (RCP). By supporting the XCP standard for CAN FD, dSPACE allows for high-performance bypassing of electronic control units (ECUs) and network access with a much higher bandwidth than with the classic CAN bus.

High-Performance ECU Bypassing Directly via CAN FD dSPACE now also supports the CAN FD communication bus standard 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 dSPACE 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 established dSPACE RTI Bypass Blockset. This new CAN FD support for bypassing gives dSPACE customers an additional attractive choice for selecting the ideal bypassing interface for their projects.

DCI-CAN2 Enables Bus Access from the Host PC With the new DCI-CAN2 communication interface, users can access ECU networks based on CAN or CAN FD conveniently from their PC. The compact and robust DCI-CAN2 uses the host PC’s USB interface to communicate with the ECU bus network. This way, CAN/CAN FD data can easily be monitored and visualized for analysis and diagnostics on the host PC by using the Bus Navigator in dSPACE 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 dSPACE prototyping hardware. External bypassing provides the highest 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. dSPACE 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.

About CAN FD:

Compared to the classic CAN protocol, CAN FD (FD = flexible data rate) offers a much higher data throughput and a larger payload length. With CAN FD, the multiplied data throughput rate allows for transmission speeds of several Mbit/s and a payload length of up to 64 bytes (compared to 8 bytes with the conventional CAN protocol).


dSPACE develops and distributes integrated hardware and software tools for developing and testing electronic control units and mechatronic controls. The application areas for dSPACE 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.

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