Researching On Embedded System Connecting To Internet

With the rapid development of the processor technologies and embedded applications such as communication products, electronic consumer goods, etc., embedded systems is penetrating into the every aspect of social living space. Many embedded systems need to exchange a huge amount of data with external world, and some advanced applications also require high speed, reliability, etc. The above is introduced at the beginning of this thesis, and the paper explains the reason why doing research on embedded system connecting to Internet is necessary by comparing the Internet with some traditional manners. The state of fact of this task is also mentioned here. In the main part of this thesis, firstly, the TCP/IP protocol stacks are analyzed in detail and the content of the ARP, ICMP, IP, UDP and TCP protocol are described. In succession, a hardware platform, which can be used to connect to the Internet, is provided and a TCP/IP protocol stacks is implemented on it. And throughput tests are carried on by changing the CPU with various microcontrollers which are representative. The result of this experiment can provide reference to the choice of software/hardware in practical application.Finally, two actual applications of the TCP/IP protocol stacks implemented in this thesis are enumerated. The limitations and problems of the protocol stacks are also mentioned. And the paper pointed out that the research of embedded systems connecting to the Internet basing on 802.11 b or modem, besides Ethernet technology, is worth to be carried on in future.