基于DSP和LAN91C111的嵌入式以太网接口

Implementation of Embedded Ethernet Interface Based on DSP and LAN91C111

以太网及TCP/IP协议已经成为事实上最常用的网络标准之一,它在各个领域的应用越来越灵活。嵌入式以太网不仅可用于工业现场实现现场节点的自动上网功能,而且可以用于信息家电的以太网接口,可以实现远程控制,具有很好的发展前景。文中介绍了基于DSP(数字信号处理器)内核的微处理器TMS320LF2407的嵌入式系统与较新的自适应10Mbit·s-1 /100Mbit·s-1嵌入式以太网控制器芯片LAN91C111的接口电路及软硬件实现方法。

Ethernet and TCP/IP has become the most commonly used network protocol in fact. It has been widely used in many fields. One method using DSP processor to realize the embedded Ethernet interface is introduced. Basing on analyzing processor DSP and Ethernet control chip LAN91C111, the processor DSP is designed to have hardware connection with Ethernet control chip LAN91C111. The paper also provides the corresponding hardware connection and software control process. Especially the μC/OSⅡ real-time system is used in processor DSP and the start of the LAN91C111 process is given. At last, data transmission is realized through the in-line TCP/IP protocol of the operation system.