Design And Optimization Of Complex Information Network Based On CAN2.0 Standard

CAN bus is a multi-form serial data communication bus, which has the characteristics of high reliability, real-time, perfect performance, unique design, and low price, and nowadays has become one of the most widely used international fieldbus since 1993 when CAN bus was regarded as the international standard ISO 11898. CAN bus network design and real-time transmission of information has become a hot research in today's field bus.This thesis analyzes the main problems CAN network facing and the key technologies of CAN network. What's more with the CAN 2.0 standard architecture, the complex information network communication protocols and dual-network technology are studied.This thesis firstly describes the development of the CAN bus, and explaines the basic concepts of the CAN bus. Secondly, with the stardand CAN 2.0 standard protocol, a solution on complex CAN networks is designed. In that given scenario, this thesis analyzes specifically the CAN communication network topologies, information exchange, identifier allocation, and network configuration, and among those technologies, more importance are attached in the method of identifier allocation and dual-network implementation of the complex network architecture. At last, this thesis designs and implements the corresponding communication protocol stack specification in accordance with the particular structure of the complex network.The underlying driver and CAN-serial conversion module is built with C language under the environment of embedded integrated development platforms IAR EWARM, and the executable emluator is built with C++ language under the environment of Visual C++6.0. In the process of verification, the CAN-serial conversion module receives the frame data sent by serial successfully, and then converts the frame data to CAN message identifier data which is allocated by the specific configuration of that CAN network after analysis. At last we realizes the bidirectional data transmission between the node in CAN network and serial. The simulation results verify the feasibility, stability and reliability of the solution given by this thesis, which provides more theoretical basis for the later study.