Research Of Vehicle Control System Based On CAN Bus

With the rapid development of modern automobile and electronic technology, the electronic devices of automobile increase rapidly, which makes the automobile integrated control system to be more and more complex. Moreover, along with the recent years ITS development, take 3G (GPS, GIS and GSM) as representative's new electronic communications product appearance, set a higher request alternately to the automobile comprehensive wiring and information sharing.The automobile network bus appearance has provided the effective addressing method for this a series of questions.This study starts from the vehicle LAN, mainly studied the development of the CAN-bus used in advanced automobiles in the world. Researched and absorbed the CAN-bus which is most wide applied in international car industry now. This paper analyzes two kind of design proposal of the CAN node, makes multianalysis to the structure of the independent CAN the controller sja1000, this article has selected 8 microprocessor AT90CAN128 of CAN controller, which integrated the sja1000 function, might reduce the development cycle, has given the node hardware design electric circuit.The software design divides into the CAN controller the initialization, the message transmission and receive, the message designator definition. Based on CAN2.0 protocol , combine with CANopen protocol, in view of the function relatively simple vehicle lamp control system, constructed a reliable communication protocol.The experiment confirms, the overall system communication is reliable, data timeliness is high, between various nodes can realize data complete sharing.