Design And Implementation Of Embedded Ethernet Protocol Conversion System

As the development of Ethernet,it can be used in industrial control and information appliance areas,which can reduce the cost and make the structure simplified.Embedded systems become a new hotspot in many areas for its merit of small volume,multifunction and supporting Enternet.This embedded protocol converter of Ethernet takes embedded system as its core,uses serial interface to connect with bottom node,connects with Internet at the upper layer,allows the users on commission visit the system with IE,and monitors the serial port. This system will be widely used in building automation systems,industrial lower network and information appliance areas.Beginning with the state-of-the-art of Internet,this thesis analyses the necessity,importance and feasibility of this subject and proposes its target. It describes the implementation procedure of TCP/IP stack on 8 bit microcontroller and cuts the stack.It also analyses the implementation procedure of the protocol of every layer,the technology of hardware interface and the scheduling of the program in detail.It discusses the application of RTL8019AS,the institution of ARP buffer table and the implementation of TCP protocol importantly.It gives the implementation scheme and running results, achieves the scheduled aim.At last,it gives impersonal and general evaluation of the system,proposes the improvement ulteriorly.