说明：  CAN Controller Area Network 即控制器局域网 是国际上应用最广泛的现场总线之一 起先 CAN 被设计作为汽车环境中的微控制器通讯 在车载各电子控制装置 ECU 之间交换信息 形成汽车电子控制网 络 比如 发动机管理系统 变速箱控制器 仪表装备 电子主干系统中 均嵌入 CAN 控制装置 CAN 是一种多主方式的串行通讯总线 基本设计规范要求有高的位速率 高抗电磁干扰性 而且能够 检测出产生的任何错误 当信号传输距离达到 10Km 时 CAN 仍可提供高达 50Kbps 的数据传输速率
(Can controller area network is one of the most widely used field buses in the world It is designed as a micro controller communication in the automotive environment to exchange information among the ECU of the vehicle electronic control device to form the automotive electronic control network For example, engine management system, transmission controller, instrument equipment, electronic trunk system, can control device is embedded Can is a multi master serial communication bus. The basic design specification requires high bit rate, high immunity to electromagnetic interference and Any error detected can still provide data transmission rate up to 50kbps when the signal transmission distance reaches 10km)