面向LwIP的Nios Ⅱ网络驱动程序开发

The Development of Nios Ⅱ Network Driver on LwIP

本文介绍了以DM9000AE作为网络控制器的嵌入式系统以太网通信功能的实现方法。系统设计采用DE2作为开发平台。该系统基于Nios Ⅱ软核处理器,以太网控制器使用DM9000AE;运行μC/OS-Ⅱ操作系统,加载网络协议LwIP。本文研究DM9000AE的初始化、数据包收发的软件编程算法,重点分析LwIP的网络接口驱动层设计。开发了DM9000AE在LwIP下的驱动程序,完成LwIP在DM9000AE芯片上的移植。最后,通过开发通信软件来测试系统的通信功能。

This paper presents a method of realizing embedded system network communication with DM9000AE as a network con-troller. The development platform of the system is DE2,which bases on Nios Ⅱ soft-core processor and DM9000AE. Moreover,this system runs on μC/OS-Ⅱ operation system and loads network protocol of LwIP. The software program arithmetic is studied of DM9000AE’s initialization and how to receive and transmit the data packet as well as the design of LwIP’s network interface driv-er,which is analysed sign...