The Design And Implementation Of An Embeddeb WEB Server

With the development of computer and communication technology, the use of Internet and embedded intelligent instruments has steadily increased ,this trend makes the whole human-being society get into the Post-PC era. In the domain of embedded system application, it becomes a hot issue in the IT world how to add the Internet to embedded system to help people control and monitor remote embedded devices conveniently without dedicated GUI(Graphic User Interface).On the basis of the a large number of English and Chinese literature, This paper firstly introduces the embedded Internet technology based on 32-bit ARM7 MCU,the basic knowledge of embedded Internet communication is introduced too. And then the refined embedded TCP/IP stack is expanded, which is simplified from standard TCP/IP in accordance with the characteristics of embedded devices. The embedded TCP/IP stack described in the paper is suitable for ARM7 MCU. The stack includes ARP(Address Resolution Protocol),IP(Internet Protocol), ICMP(Internet Control Message Protocol),TCP(Transport Control Protocol), and HTTP(HyperText Transfer Protocol).The embedded Web server is discussed on the basis of embedded TCP/IP stack.The embedded system technology, serial and Internet communication technology are combined and the implementation techniques of an embedded Web server are introduced in detail. This paper describes how to use the LPC2132+ENC28J60+H1102 hardware structure as a micro web server to send messages using the Hyper Text Transfer Protocol (HTTP) which is good for sending control data and user data to devices, With Ethernet and HTTP data transmission,small embedded systems centered on MCU can be interconnected to the Internet and share their the information. Thus, Remote users on Internet can visit this Web Server through Web Browser to monitor and control the embedded systems.Finally, several experiments are designed to debug and validate the system function of gateway , to test reliability and stability in the process of data transportation,to realize implementation of an embedded web sever etc. It can provide a kind of new good solution for the home appliances accessing Internet, and the other embedded systems' distant control and data-acquisition .