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Integration of Time Triggered CAN (TTCAN_TC)
Technical Paper
2002-01-0263
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Time Triggered CAN (TTCAN) is an extension of the well-known CAN protocol, introducing to CAN networks time triggered communication and a system wide global network time with high precision. Time Triggered CAN has been accepted as international standard ISOCD11898-4.
The time triggered communication is built upon the unchanged standard CAN protocol. This allows a software implementation of the time triggered function of TTCAN, based on existing CAN ICs. The high precision global time however requires a hardware implementation. A hardware implementation also offers additional functions like time mark interrupts, a stopwatch, and a synchronization to external events, all independent of software latency times.
The TTCAN testchip (TTCAN_TC) is a standalone TTCAN controller and has been produced as a solution to the hen/egg problem of hardware availability versus tool support and research. The TTCAN_TC supports both TTCAN level 1 and TTCAN level 2; its time triggered communication is - apart from the configuration and the watchdog function - not depending on software control. The package has been designed to be pin-compatible to existing standalone CAN controllers.
The first application of the TTCAN_TC is the evaluation of TTCAN networks, both for research and for system development. TTCAN network monitoring tools (TTCANanalyzer), based on the TTCAN_TC, will soon be available.
Authors
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Citation
Hartwich, F., Führer, T., Müller, B., and Hugel, R., "Integration of Time Triggered CAN (TTCAN_TC)," SAE Technical Paper 2002-01-0263, 2002, https://doi.org/10.4271/2002-01-0263.Also In
SAE 2002 Transactions Journal of Passenger Cars - Electronic and Electrical Systems
Number: V111-7; Published: 2003-09-15
Number: V111-7; Published: 2003-09-15
References
- ISO/DIS 11898-1; Road vehicles - Controller area network (CAN) - Part 1: Controller area network data link layer and medium access control
- ISO/CD 11898-4; Road vehicles - Controller area network (CAN) - Part 4: Time triggered communication
- Fault Tolerant TTCAN Networks Müller B. Führer T. Hartwich F. Hugel R. Weiler H. Robert Bosch GmbH Proceedings 8 th International CAN Conference 2002 Las Vegas
- The Configuration of the CAN Bit Timing Hartwich F. Bassemir A. Robert Bosch GmbH Proceedings 6 th International CAN Conference 1999 Turin
- TTCAN User's Manual Robert Bosch GmbH 2001 http://www.can.bosch.com/docu/Users_Manual_TTCAN.pdf
- http://www.can.bosch.com/content/TT_CAN.html