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1、摘 要随着通讯技术、网络技术和半导体技术的飞速发展，嵌入式系统接入网络已成为其应用的一个重要方向。越来越多的嵌入式系统选择Web 服务器的方式与Internet 进行数据交换。而以太网是构筑现代Internet 网络的基础，因此选择基于以太网的嵌入式Web 服务器技术实现数据交换将具有较高的实用价值。温度是程控机房、档案室、图书馆、农业生产基地等众多场所需要实时监控的一个重要物理量。温度监控系统在实际生活中有着重要的作用。本文主要针对ARM7TDMI核的微处理器芯片，结合嵌入式Web 服务器技术，提出了基于以太网的远程温度监控系统的设计方案。该方案成功的实现了温度采集和控制的网络化。本设计采用
2、的是丰宝公司的 LINPO-PS LPC_2478 实验板，进行远程温度监控系统研究，该板采用了恩智浦公司基于 ARM7TDMI-S 内核、单电源供电、LQFP208 封装的LPC2478，具有 JTAG 仿真调试，ISP 编程等功能。uClinux 是应用于微控制领域的一种嵌入式 Linux 操作系统，它源码开放，移植性好，支持多种硬件平台和几乎所有常见网络通信协议，支持文件系统丰富，是一个功能完整的嵌入式操作系统。并且有大量优秀的开放源代码的应用软件和开发工具可用，因此，采用 Clinux 作为操作平台，使用 Web 技术进行远程在线监测系统的开发。Boa 是一个高性能的单任务型 Web
3、服务器，可以运行在几乎所有的类 Unix 的平台上，Boa 支持认证，支持 CGI，功能比较全，占用资源也少，非常适合于用在资源有限的嵌入式系统中，目前 Boa 已经以源码的形式包含在 uClinux 的发行包中。所以本设计采用 uClinux 和 boa 服务器可以较好的满足本次设计要求。关键词：远程温度系统；AMR7；LPC2478；u-boot；uClinux；nand flash；nor flash；dp83848；ds18b20；cgi；boa；web； AbstractAlong with communications technology, networking technolo
4、gy and the technology embedded systems developing rapidly and access network has become an important direction of its application. more and more options embedded systems and internet web server exchange data. And ethernet is construct a modern internet network infrastructure and therefore opt for et
5、hernet technology embedded web server for data interchange will be the practical value of the room. the temperature is controlled, and the archives, libraries, agricultural production base in many places such as real-time monitoring require a major physical quantities. the temperature control system
6、 in practical life is an important role. This article mainly aimed at the microprocessor chips arm7tdmi, the technology embedded web server, based on the temperature of the ethernet remote control system design scheme. This scheme successful to the collection and control of the network.The design is
7、 based on the Fengbao Electronic Technology (Shanghai) Co., Ltd LINPO-PS LPC_2478 board to carry out the analysis on meter reading system, the board is integrated with NXP ARM7TDMI-S kernel, Single power supply, LQFP208 enclosed LPC2478, JTAG simulated debugging and ISP programming functions, etc. T
8、his design adopts uclinux and the boa server can better meet the requirements. uClinux is applied to a control an embedded linux operating system of its open source and transplant well, and support multiple hardware platforms and almost all common communication protocols network, supported file syst
9、em, is a function of embedded system. and there is a good open source software application and development of tools available, and therefore, adopt clinux as operating platform, the use of remote web technology in the monitoring system development.Boa is a performance of the task type of web server
10、and run on almost all the kind of unix platforms, boa support and support, and the cgi be holding resources are few and are suitable for use in the limited resources of embedded systems, and the boa has been a source of the forms contained in the issue of uClinux package. So this design adopts uclin
11、ux and the boa server can better meet the requirements.Key words: remote temperature measurement and control system; ARM7;LPC2478;u-boot;uClinux;nand flash;norflash;dp83848;ds18b20;cgi;boa;web;目目 录录引言.51 项目设计方案.62 开发环境介绍.72.1 LINPO-PS LPC_2478 介绍.72.2 NORFLASH 介绍 .72.2.1 AM29LV160DB 简介.82.2.2 AM29LV160DB 的操作命令字.82.2.3 Nor flash 的映射.82.3 NAND FLASH介绍.92.3.1 Nand flash 芯片工作原理.92.3.2 Nand flash 主要内设命令详细介绍.102.4 以太网接口介绍 .11 2.4.1 以太网模块特点.11 2.4.2 以太网模块初始化.12 2.5 软件开发环境的介绍 .133 U-BOOT 的移植.
