| With the rapid development of electronic technology, Computer technology and Communication technology in Information times and the board application of Internet, and the coming of the post personal computer (PC) times, it is clear that 3C (Computer, Communication and Consumer) will converge in the near future which will lead the focus of Computer Industry from the Compute product to Information product. With the development of the hardware technology and the high demanding of the Information Appliance, Embedded Operating System will be the most favorite thing in this industry. At the same time, in the field of omputer science itself, the micromation and specialization is the new direction of the computer world. It also wants the support of Embedded System. So, the research of the critical technique relating to the embedded system is the most important thing.Information Terminal and Embedded TCP/IP can offer very good service. If the embedded equipment, which supports relevant protocol of Internet, such as TCP/IP, etc., becomes the Information Terminal, users can use the remote browser end to visit web server resources.In this thesis, a miniature, practical Information Terminal is set up. It may link remote terminal resources and exchange data amang servers and itselef. The Information Terminal is mainly made up of a CPU based on 80186 core and the Ethernet controller;TCP/IP protocols supported include ARP protocol, IP protocol, ICMP protocol, TCP protocol, HTTP protocol, etc. In the hardware design, adopt the low-priced, RISC(Reduced Instruction Set Computer) applied, powerful 16-bit processor KT8808 to control the Ethernet interface controller RTL8019AS which is used extensively in embedded Internet;It is simple, reliable to connect. In software design, to the following protocols: ARP protocol, IP protocol, ICMP protocol, TCP protocol, HTTP protocol, etc., a optimized realization has been carried on;Optimized TCP/IP protocol will relatively lower the consumption of the system resource, and can be operated in KT8808 CPU.The actualization of the Information Terminal may offer WWW service for computers on the network. Users on the network can use various kinds of Web browsers to visit the server. The network scheme for the information terminal put forward by this thesis, which is not only low cost, but also meets the current requirment, is suitable for the China's actual conditions. It will have extensive application prospect and market value. |
