摘 要

近年来随着Internet技术和嵌入式技术的迅速发展，网络化的嵌入式产品已经成为IE产业的最大增长点。随着信息技术的飞速发展，当今社会逐渐步入网络时代，因特网已成为重要的基础信息设施。这方面的技术进步对于社会的各个方面产生了积极影响，很多领域都在不断探索，开发和利用网络的潜力。使用Web,浏览器已经成为许多人的习惯，诸如Microsoft Explore ，火狐和遨游等等。这样的Web 浏览器软件已经成为现代人使用最为熟练的工具。通过Web可以实现最为亲切的信息互动。新型的电子产品与电子设备如果不能适应这个发展的方向和要求，将很难有强劲的竞争力。

目前大部分网络终端仍以PC的形式出现，但是从计算机应用普及情况看，嵌入式系统更为普及，过去大量的浩如烟海的8/16位单片机的嵌入式设备，如仪器仪表、数据采集和显示、过程控制、工业自动化、家庭自动化等的实时应用，已经到了享受网络方便的时候了。

近来的统计证明：PC机CPU的产量仅是MCU产量的百分之一，并且由于MCU的成本低廉，应用非常普及。在工业测控，智能仪器，智能家庭领域，MCU应用系统已无处不在。在这些场合中，以MCU为核心的设备同样也需要解决接入因特网的问题。将嵌入式设备接入Internet已经成为一种必然，把web服务器应用到嵌入式设备已经是可以实现的技术，而web技术对嵌入式设备进行远程控制、监测等则是最自然和最切实可行的选择。

由于嵌入式系统是交叉开发的系统，在主机上对嵌入式系统设备的内部资源的观察、调试和管理是比较困难的工作。本课题研究如何在嵌入式系统中建立一个简单的WEB服务应用，使得开发人员可以在常用的WEB浏览器中，对设备的内部资源进行管理、调试，从而实现一个模块化的、通过模块配置可以适合几种嵌入式系统、屏蔽目标平台的异构性的嵌入式WEB服务器。使得嵌入式系统内部资源的调试工作变得简单易行，加快开发速度，提高工作效率，减少工作负担。嵌入式系统和web技术的有效结合，有利于对设备的管理与操控，为工业生产等设备的管理控制提供了很好的途径。

由上所述，嵌入式中的Internet技术带动了设备与设备之间、设备与人之间的通信方式的变革，而研究实现嵌入式Internet的关键技术之一就是嵌入式web服务器的实现技术，对于嵌入式web服务器的研究和应用，其意义是重大的。它为我们管理、控制和监测各种各样的设备提供了一个很好的途径。这种设备可以是具有有限内存资源的8位或者16位系统，已足够提供一个用户界面，而且这种方式是基于Internet的。这种设备可以在世界上任何一个地方，只要它连入Internet就能够控制它。这对开发嵌入式Internet产品具有重要意义。

【关键词】 web服务；嵌入式系统；http协议；socket服务

Abstract

In recent years, Internet technology and embedded technology with the rapid development of embedded network products have become the biggest growth industry in IE. With the rapid development of information technology in today's society gradually into the Internet age, the Internet has become an important basic information facilities. Technological advances in this area in all aspects of society had a positive impact, many areas are constantly exploring the potential for the development and use of the network. Using the Web, the browser has become the habit of many people, such as Microsoft Explore, Firefox, and travel and so on. Web browser software that has become the most skilled use of modern tools. Can be achieved through the Web the most intimate information interaction. New electronic products and electronic devices can not adapt to this development if the direction and requirements, will be difficult to have a strong competitive edge.

Still present, most network terminal in the form of PC, but the situation from the popular computer applications, embedded systems are more popular, a lot of the vast past 8 / 16 bit microcontrollers for embedded devices, such as instrumentation, data acquisition and display , process control, industrial automation, home automation, real-time applications, the network has come to enjoy the convenience of the time.

Recent statistics prove: PC, CPU production output of only one per cent of MCU and the MCU's low-cost, application is very popular. In the industrial measurement and control, smart instrumentation, smart home field, MCU application system has been everywhere. In these occasions, the MCU as the core of the device also need to address the problem of access to the Internet. Internet access to the embedded devices has become a necessity, the web server applications to embedded devices has been the technology can be achieved, and web technology for remote control of embedded devices, monitoring is the most natural and most practical choice.

Due to the embedded system is cross-developed systems, embedded systems in the host device on the observation of internal resources, debugging and management is more difficult. The research in embedded systems to create a simple application of WEB services, so developers can commonly WEB browser on the device's internal resources, management, commissioning, in order to achieve a modular, can be configured through the module for several embedded systems, shielding the heterogeneity of the target platform embedded WEB server. Make the embedded system debugging internal resources to become simple, speed development, improve efficiency and reduce workload. Embedded systems and the effective integration of web technology, it is beneficial for equipment management and control, and other equipment for the industrial production management and control provides a good way.

From the above, embedded in the Internet technology driven equipment and devices, equipment and means of communication between the changes, and study the key technologies of embedded Internet web server is one of the realization of embedded technology, Embedded web server for the research and application, its meaning is significant. It is for us to manage, control and monitoring of a wide range of equipment provides a good way.

【Keyword】 web services；embedded system；HTTP protocol；socket service