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Tradeoffs in Handling Unwanted J1850 Messages
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English
Abstract
A typical node on a J1850 in-vehicle computer network uses only a subset of the total message set. Discarding unwanted messages requires node resources including time, RAM, and ROM. No single message discarding scheme will simultaneously have minimum impact on all three resources. This paper investigates tradeoffs of various schemes.
For this paper, tradeoffs are determined using a Motorola 68HC11. One algorithm is very fast, but uses considerable ROM. Another algorithm uses minimal ROM, but can be extremely slow. Other presented algorithms give a range of speed verses ROM tradeoffs. RAM usage was not a significant issue.
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Citation
Bartlett, A. and Croft, D., "Tradeoffs in Handling Unwanted J1850 Messages," SAE Technical Paper 952579, 1995, https://doi.org/10.4271/952579.Also In
References
- SAE Surface Vehicle Standard J1850 Class B Data Communication Network Interface May 1994 SAE International Warrendale, PA
- Miesterfeld, F. Luitje, W. “Full Vehicle Multiplexing at Chrysler,” SAE Paper 950033
- Tenenbaum, A. M. Langsam, Y. Augenstein, M. J. Data Structures Using C Prentice Hall 1990
- SAE Surface Vehicle Recommended Practice J2178 Class B Data Communication Network Messages Sept. 1993 SAE International Warrendale, PA