The Research & Construction For The Mixed Network Of BCM Based On CAN/LIN Bus

To the end of 2009 China has the advantage of more than 300 million, and surpass the U.S. for the first time, and become the largest country of the world in the automotive production and marketing. But all high value-added products like electronic parts and components are imported from abroad, in other words, the money is into the pockets of foreign.So the development of the electronic information network which used the CAN/LIN bus as its crucialtechnology is one of the key technologies for the development of China's automotive.This article is in this context to the research and application.In this paper, refer to the large amounts of data to introduce the background of the car electronics development, in combination with auto body technology of internal and external conditions, analysis the vehicle network technologies and features in detail. At the same time understanding the OSI model about CAN/LIN protocol and introducing the CAN/LIN protocol in detail.In the analysis of the CAN/LIN protocol,reference to the solutions of typical body network this paper proposed to use the Freescale's MC9S12XDG128 as BCM's MCU, and build a network of automotive body control systems,define the task mechanism and logical division.At the same time this paper designs combination switch module (including the function of CAN/LIN)which provids relevant signal to BCM.Finally,this paper give a brief introduction about the debugging software and related tools.This paper completed the preliminary investigation, topology diagram and schematic designs.Finally the system was tested in the physical models and achieve the related functions.