The Research And Implementation Of Embeded WEB Server Based On LWIP

In recent years,with the development of embedded systems,a variety of embedded devices has been widely used in household,industrial,military and other fields.In the application of quantity far more than the general-purpose computers. Today's society has come into the informatization,network-based era,a variety of embedded devices are also need the use of the Internet to send theinformation quickly and easily spread to any of the locations urgently,in order to achieve remote control.How to realize the embedded networking in the embedded devices of limited resources has become an important question that needs to be paid attention and researched.Today,in a number of control areas,use the CAN,RS232,etc.bus network to achieve the exchange of information between the MCU.The bus network will be an effective radius is limited,less communication protocol,and isolated from the outside Internet.In the base of this status quo,This dissertation proposed the embedded WEB server,through the WEB technology,the information will be send in the form fo web pages to any where dynamicly and quickly,so that embedded Internet become a reality.According to the characteristics of the embedded devices,in-depth study and analysis of the TCP/IP protocol stack features as well as the communication protocol on the existing basis of comparison,The dissertation proposed LWIP,which is a new communication protocol suitable to the embedded systems.Base on the analysis of the characteristics of the embedded devices and the functional requirements,The dissertation sheared the TCP/IP protocol stack,so that LWIP can run on so that limited resources LWIP can run on the embedded devices.In rder to realize the Function of Dynamic WEB server,the dissertation analysised the CGI that is the Dynamic technology of suitable to the embedded systems,researched the CGI through the URL,FORM to realize the function of Dynamic Interaction.proposed the Simple embedede CGI,so that Embedded WEB server can realization a simple dynamic WEB possiblely.The paper proposed the dynamic embedded WEB server,and implementationed based on the embedded LWIP,file system and CGI,allowing users to be able to control the embedded system in real-time through Internet WEB server,The design of embedded WEB server accords with the needs of the embedded devices and network technology development,which has good value of the theoretical study and the broad marketprospect.