CAN转以太网网络互连设备设计.docVIP

 CAN 转以太网网络互连设备设计 刘凯，刘晓文** （中国矿业大学信息与电气工程学院，江苏徐州 221008） 5 10 15 20 25 30 35 摘要：论文首先探讨了系统的应用背景，重点介绍了 CAN 总线与工业以太网各自的研究现 状以及课题的研究意义，其次对设计中的关键技术进行介绍，本文提出了基于 LPC2378 的 硬件设计和软件设计方案，硬件部分由硬件框图引出对各个模块的分析，软件在 Keil uVision3 平台上设计了 CAN 接口、以太网接口和协议转换程序，并使用流程图对程序的实 现进行详解。测试阶段搭建硬件平台，在 CAN 口波特率为 62.5Kbps 和以太网口速率为 10Mbps 的条件下进行功能测试实验，结果表明系统性能良好。 关键词：CAN 总线；以太网；网络互连 中图分类号：TN402 The design of CAN to Ethernet network interconnection equipment LIU Kai1, LIU Xiaowen2 (1. School of Information and Electrical Engineering, China University of Mining Technology, JiangSu XuZhou 221008; 2. School of Information and Electrical Engineering, China University of Mining Technology, JiangSu XuZhou 221008) Abstract: In the thesis, firstly, system background is discussed, and then research status of CAN bus and Industrial Ethernet and topic research significance are emphatically introduced. Then, this thesis introduces the key technologies which are involved in the design,. after brief introduction of the interconnecting technology, this thesis brings forward a hardware design and software design based on LPC2378, leading to analysis of each module by hardware block diagram in hardware part and designing CAN interface program, Ethernet interface program and protocol conversion program on the platform of Keil uVision3 in software part, and the programs are explained in detail by using the flow chart. In the testing phase, after building phonetic system we carry out function test on the condition of using 62.5Kbps as CAN baud rate and 10Mbps as Ethernet rate, and the results show that the system has good performance. Key words: CAN bus; Ethernet;network interconnection 0 引言 随着计算机技术、现场总线技术及信息技术的发展,CAN(Contmner Area Network)总线在 [1] 信能力较弱。而以太网作为当今的主流网络,具有恨强的远程通信能力。为了融合这两类网 络的技术优势,实现 CAN 总线网络与以太网的数据互联,必须设计一款 CAN 和以太网协议转 换的网络互连设备。 作者简介：刘凯（1987-），男，硕士，主要研究方向：CAN 总线，语音信号处理 通信联系人：刘晓文（1964-），女，教授，主要研究方向：无线传感器网络，现场总线. E-mail: cumt_liu1964@126.com -1- 1 系统硬件设计  40 45 50 55 60 系统硬件主要由主控器、CAN 收发器、以太网收