Application And Realization Of LIN Buson Steering Wheel Switch

With the great increase of the vehicle electronic technology, more and more electronic product has been equipped on the vehicle today, which makes the vehicle electoral system is a complex system. If the traditional wire harness technology is still applied, the wires in the vehicle will be longer and more complex. Meanwhile, share of information between and real-time performance is required with the application of Micro-controllers. To solve the problem, vehicle bus technology is applied in modern vehicles, including LIN bus technology.Major vehicle network technology and the application are introduced first. Secondly the advantage of LIN bus in declining cost is introduced. LIN protocol is also introduced, including the basic concept, main feature, and typical application. Then the LIN bus technology application in steering wheel switch is described, including the function of the switch, related network structure, hardware selection of Master/Slave nodes, circuit design based on LIN protocol and EMC performance, software architecture, definition and realization of LIN driver / API functions. At last, the whole development process is summarized.