The Research Of Embedded Web Server Based On Linux

With the computer technology and communication technology, embedded systems have been applied to all areas of society. Embedded systems are impacting on people's production, living and learning in different forms. Most embedded systems have been applied in a single approach to embedded microprocessor core, with some monitoring, servo, pointing device with a certain function. Commonly they are used in education, for example electronic dictionaries, e-book, MP3, MP4 and other digital devices in most of the independent application state, not directly connected with Internet ,they can not be achieved real-time information updates and information exchange. In some industrial control and automotive applications, in order to achieve the exchange of information between multiple microprocessors, we use CAN, RS-232, RS-485 bus to the microprocessor connection with networking, but scope of the network is limited, and the communication protocol is relatively simple, and generally isolated from the outside Internet, without implementation of the interconnection system, thus greatly limiting the scope of its application.Internet has become one of important social basic information infrastructure and is one important channel for the flow of information, if the embedded system can connect to the Internet, you can easily, cheaply transfer the information to virtually anywhere in the world, and may conveniently realize remote control. If you can embedded system connect to Internet, it will greatly enhance the scope of use, so that remote monitoring can be achieved. This article is based on this proposed through the hardware platform design and software design, to build an embedded WEB server and embedded systems connected to the Internet function.Papers, mainly studied the embedded WEB server from two aspects of hardware and software operating system transplantation, in the hardware platforms design side, by comparing the performance of a variety of microprocessors, the final selection of a widely used and cost-effective microprocessor as core of a hardware platform, in order to based on this platform to build a variety of peripheral circuit required to meet the development needs, in the software side, the major use of open source, powerful Linux operating system, after cutting, transplanted to the development board, using TCP/IP protocol to achieve into the Internet.Papers, mainly be studied by the following aspects:(1) Study in selected development platform for embedded microprocessor design to build the necessary peripheral interface circuit for the next stage of development to provide efficient and reliable hardware platform. (2) To study the embedded operating system migration methods and concrete realization of the embedded WEB server for embedded systems to build a WEB server. using TCP / IP protocol and Socket socket makes embedded WEB server and client side network communications.Using terminals browser and client software to directly access the embedded WEB server, without the need for PC as a medium of interaction .(3) Research Network, Communication Theory, using TCP / IP protocol and Socket socket make embedded WEB server and client side network communications.(4) To analize CGI principle, design of embedded WEB server application. To build a good WEB server, but also to use dynamic web technology for their applications, because the static page single can not satisfy interaction functions of the server and client.In this paper, research and development work is done on the basis of practice, as ARM7TDMI core, embedded hardware systems S3C4510B conducted a comprehensive study, through commissioning, the hardware system is running normally, on this basis, the successful transplant of the Linux operating system, the system operating normally, and the system implemented on embedded WEB server, enabling embedded system successfully access Internet. On this basis, a variety of software development and use have become more convenient and flexible. By using a common browser, users can anytime, anywhere access to the embedded WEB server, maintaining embedded devices, to provide the ultimate of the system convenitly, to achieve the desired results.