嵌入式以太网通信系统设计与实现  

Design and Implementation of the Embedded Ethernet Communication System

作　　者：郭志红[1] 石春[1] 吴刚[1] 

机构地区：[1]中国科学技术大学信息学院自动化系,合肥230027

出　　处：《小型微型计算机系统》2015年第4期754-758,共5页Journal of Chinese Computer Systems

基　　金：2012年安徽省科技攻关重点项目(12010202038)资助

摘　　要：汽车网络方兴未艾,目前传统的有LIN(Local Interconnect Network)、CAN(Controller Area Network)、FlexRay等多种汽车网络总线,根据汽车网络总线的特点将其划分到汽车不同的应用领域,以满足汽车网络的复杂环境.随着越来越广泛的跨区域数据交换和不断增长的数据带宽需要,统一的车内网络通信标准和更快更稳定的数据交换成为汽车厂商和用户的共同追求,而以太网则有希望满足这些需求,实现彻底的互联互通,使得下一代汽车更智能、更舒适.本文研究并实现了基于DMA(Direct M emory Access)描述符和中断信号量任务接收机制的嵌入式以太网通信系统,满足车载嵌入式通信对实时性、可靠性和稳定性的要求,网络传输速率理论最高可达100Mbps,远高于目前车内常用网络通信标准的速率.Car network is growing rapidly and traditional automobile network buses including LIN （Local Interconnect Network ） ,CAN （ Controller Area Network ） and Flexray, etc. In order to satisfy the complex car network environment conditions, the network buses are partitioned into different application fields according to its own characteristics. Along with the need of extensive cross-domain data ex- changes and increasing data bandwidth, unifying in-car network standards and faster and more stable data exchanges become the com- mon pursuit of the automakers and customers. Embedded Ethernet maybe make the hope become true and implement real interconnectivity. It can make the next generation of cars more intelligent and comfortable. This paper designs an embedded Ethernet communica- tion system. The system is based on the DMA（ Direct Memory Access） descriptor and receiving task mechanism which is waked up by the interrupt semaphore. The system also meets the requirement of real-time, reliable and stable for the embedded Ethernet communica- tion. The network transmission rate can reach 100Mbps.

关 键 词：嵌入式以太网 ΜC/OS-II实时操作系统 μC/TCP-IP协议 DMA描述符 μC/DHCPc 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]