CAN总线协议分析

现场总线的发展与应用引起了传统控制系统结构的改变。控制局域网(CAN）总线因其自身的特点被广泛应用于自动控制领域。CAN是具有很高的安全水平、能有效支持分布式实时控制的一种串行通信协议。本文介绍了现场总线的发展现状，对CAN场总线协议进行了详细的描述，重点介绍信息格式和数据链路层。此外，还介绍了CAN控制器验收滤波器的原理。

The Analysis of CAN Bus Protocol

The development and application of field bus technology result in the change in the construction of the traditional control system. Controller Area Network (CAN) bus is widely used in the automation control fi-elds because of its features. The CAN is a serial communications protocol which efficiently supports distributed real time control with a very high level of security. It should be a prospective communication technology in the fi-eld of field bus. The development of field bus is introduce in this paper. Furthermore , the analysis of CAN bus protocol is the important of this paper, the message framing and data link procedure are introduced in detail. More-over, this paper introduces briefly the principle of filter of the CAN controller.