摘要
随着网络和嵌入式系统的发展,基于嵌入式系统的以太网已成为目前的一个研究热点。本文提出了一种基于32位ARM处理器LPC2214和以太网控制器DM9000A的嵌入式以太网接口设计方法。文章介绍了DM9000A的功能原理、网络接口硬件电路设计和软件设计,在软件部分给出了中断方式的以太网数据包收发程序流程图,提出了在μC/OS-II操作系统下移植LwIP协议应注意的问题。在此软硬件基础上完成了一个嵌入式以太网接口卡,该网卡具有结构简单、实现方便、性价比高等优点。
With the development of the internet and the embedded system, the embedded Ethernet has been a research hot spot. A design of embedded Ethernet interface based on ARM processor LPC2214 and Ethernet controller DM9000A is proposed in the paper. The paper describes the performance and work principle of DM9000A, the hardware and software design of the system. In the software segment, the program configurations using interrupt method for transceiver and what should give attention to during the transplant of LwIP in μC/OS-II are presented. Base on these hardware and software; in the end succeed finish a design of embedded Ethernet interface card witch has many features such as small dimension, convenience to realization and high performance price ratio.
出处
《电子测量技术》
2008年第6期86-89,共4页
Electronic Measurement Technology
