基于FPGA的CAN总线星形拓扑结构设计

Design of Star Topology for CAN Based on FPGA

CAN总线已在分布式控制系统中得到了广泛的应用。CAN总线采用总线形拓扑结构存在很多不足,限制了其在很多领域的推广。介绍了CAN总线的仲裁机制并设计了一种基于FPGA的CAN总线集线器,利用该集线器可以实现CAN总线的星形网络拓扑结构,解决了现有总线形CAN网络的缺陷。

CAN has been widely used in distributed control system. CAN used as a bus topology has many deficiencies, which limits its popularization in many fields. The arbitration of CAN is introduced and a CAN_HUB based on FPGA is designed. The CAN star network topology which resolves the defects of the bus topology can be achieved using this hub.