基于32位处理器的网络驱动及协议栈研究

摘要

With the rapid development of the embedded Web,the communication demand among different embedded devices through the Internet becomes increasingly intense,especially in the industrial monitoring field. The customized 32⁃bit processor embedding MAC module was taken as the hardware platform,which was developed by the project group itself. And on this ba⁃sis,the network drive of descriptor⁃based DMA transfer mechanism was designed. In order to realize the functions of stable data communication and Web browser,the protocol stack LwIP of the embedded TCP/IP was performed with transplantation without operating system. The data management method and bottom⁃layer port inside the protocol stack are analyzed in detail. The test re⁃sults show that the LwIP is suitable for the the industrial remote monitoring,and can realize stable communication while ensuring the high speed and low memory consumption.%随着嵌入式Web的飞速发展，以Internet为中间环节使不同嵌入式设备进行通信的需求日益强烈，特别是在工业监控领域。采用项目组自行研发的内嵌有MAC模块的定制版32位处理器作为硬件平台，以此为基础设计了基于描述符的DMA传输机制的网络驱动。同时，为了实现稳定数据通信及Web浏览器功能，对嵌入式TCP/IP协议栈LwIP进行了无操作系统移植，并对协议栈内部的数据管理方式及底层接口进行详细分析。测试结果表明，LwIP协议栈适用于工业远程监控，能够在实现稳定通信的同时兼顾速度与小内存消耗。