一种高可靠与实时性CAN总线通讯网络的设计

Design of a CAN Bus Communication Network of High Dependability and Real-time

针对现代汽车电子系统中电子控件众多、通信复杂度增大的现状,设计了一种高可靠与实时性的汽车电子系统CAN总线通讯网络,提出采用高、低速两条总线连接不同实时性要求的电子控制装置,有效的减少了可能的总线冲突,提高了关键系统的实时性;通过网关实现两个不同速率CAN网络之间的通信;设计了中心监控节点及基于PC机的中央控制系统;网络的数据链路层及物理层遵循CAN2.0B技术规范,实验结果表明本文所设计CAN总线系统在可靠性和有效性方面均有较大提高。

A CAN Bus communication network of high dependability and high real-time in automobile electronic system is designed. Proposing two CAN Buses, the high speed one connects the electronic control devices with high real-time demand and low-speed one with low ones, Two CAN Buses communicate by Gateway. Central control module and central control system based on PC are designed. Data chain layer and physics layer follow CAN2.0B technical specification. Experimental results prove proposed system is effective and feasible.