基于以太网帧的嵌入式数据传输方案及实现

摘要

针对传统嵌入式以太网系统存在的数据传输速率低,通用性、实时性和扩展性差等问题,提出一种基于以太网帧的数据传输系统设计方案.数据传输采用以太网帧格式,基于LibPCAP库网络数据捕获技术实现数据的采集,使用FPGA器件适应系统间接口的差异.介绍了系统设计方案,详细说明了MAC层的FPGA逻辑实现和基于LibPCAP库的以太网帧的数据采集技术,并讨论了系统的优化.通过在声纳模拟器的以太网数据传输系统中应用,表明了该方案的可行性.%Aimed at low rate of data transmission and poor performance of the traditional embedded Ethernet system on real time, general and expansibility aspect, a embedded data transmission system based on Ethernet Frame is proposed.Data used the Ethernet frame format is used to transfor the data and is captured by data collection technology based on LibPCAP.To meet the different interfaces between systems, FPGA devices is used.The implementations of Ethernet data transmission system is introduced.The logical implementation of MAC layer on FPGA and the technology of data capture based on LibPCAP are described in detail, and the optimization of system is analyzed.The system is used in sonar data transmission system simulator which proved the feasibility of the program.