CAN总线通信原理分析

摘要

The application character,the hierarchical structure and each layer＇s function of CAN bus system are described.At the same time,because of the papers are almost about the frame structure and bit timing,based on the knowledge of structure of CAN bus system by engineering practice and in-depth understanding of controller and transceiver,we also analysis deeply the communication mechanism of CAN bus,including synchronization mechanism,address mechanism,arbitration mechanism and robustness of the implementation principle of the bus.%介绍了控制器局域网总线（CAN总线）的应用特性以及将其应用于具体的工程项目时CAN总线系统的分层结构及各层的主要功能。基于CAN总线系统结构构成,通过工程实践的具体应用以及对CAN控制器及收发器硬件结构的深入理解,并从通信的角度出发着重深入分析了CAN总线通信的节点同步机制、总线地址机制、总线仲裁机制（即总线的冲突解决机制）以及总线鲁棒性的实现原理。