Design Of Body Control Module’s Communication Protocol Stack

Due to the rapid development of electronic technology and people’s highrequirements of vehicle safety and comfort, it makes the electronic equipment on thecar gradually become numerous and complex. Car-bus network technology for avariety of complex electronic devices and control units which exists in automotiveinterior to provide unified data exchange channel to achieve efficient use of resourcesand data sharing.For the automotive sector bus, after in-depth study on the AUTOSAR agreementsof communication system,referencing to the AUTOSAR software architecturestandard, this designed a communication protocol which based on the CAN bus andLIN bus. The stack for automotive electronic control unit to provide a standard datatransfer and process method,mades the communication of network node to achieve.This BCM communication protocol stack adopt hierarchical modular structurewhich divided into communication services layer,communication hardwareabstraction layer and the communication driver layer. Communication services layerlocated in the communication abstraction layer and RTE layer. Except for upper layerto provide a unified software interface but also supports the lower data to send,receive and confirm;Communication hardware abstraction layer provides configurableuniform interface for communication network and establishs a simple and reliablecommunication mechanism between software components;The main role of thecommunication driver layer is the link between software and hardware.It provides aunified interface for the upper layer and makes upper layer software independent ofthe microcontroller.This study focuses on the design and implementation of each module BCMcommunication protocol stack layer, referencing to the AUTOSAR softwarearchitecture standard.