中文摘要：

设计了一种用于演示以太网通信关键技术的以太网试验系统,给出了系统结构和试验项目。设计了以ARM7微处理器LPC2478为核心试验节点的硬件。在软件设计中移植了嵌入式操作系统内核和TCP/IP协议栈,提高了软件可靠性和可扩展性。利用IP协议,以数据发送和接收为实例,介绍了试验系统对于以太网关键技术进行演示的方法。

英文摘要：

An EtherNet experimental system to show the key technologies of EtherNet was designed,the system architecture and experimental items was given.The core of the experiment node hardware is LPC2478 which belongs to ARM7 series was designed.The embedded operating system kernel and TCP/IP protocol stack were transplanted in the software design to improve software reliability and scalability.The test of using IP protocol to send and receive data was taken as an example to describe the method of demonstrating key technologies.