Research And Implementation Of Embedded Ethernet Control Technology

With the development of the Ethernet technology , there is a destination of combining Embedded System and Ethernet which used in industrial field. Based on this leading control thought, this thesis introduces the project based on embedded industrial Ethernet, discusses and realizes the hardware configuration and software system of the node network controller . We can build the uniform net control system using this technology.A complete configuration of Ethernet control net is analysed firstly , Ethernet node controller is builded . the mechanism of net interface layer is analysed , the question of communication between node MCU and net is resulted. The control schedule has high transmission and good performance using the MCU (ATmegal28) with high capability.Realizing the uniform net communication protocol is the other emphases in this thesis., which includes Ethernet frame R&T protocol, net protocol, credible transmission protocol and HTTP data dispose protocol. Slide window, timeout retransmission and acknowledgement mechanism are used to make sure of the credibility of TCP. It's one of the important questions settled how to make the consistent about the embedded protocol and common protocol and accord with the peculiarity of embedded system. Simple code flow, standard layer configuration and logical transfer interface, these constitute the feature of software design.The last part of the thesis studies the realization of B/S configuration model. We designed concise web file system, and the interface between embedded node controller and remote browser using CGI technology. So the work of updating system parameter and gathering bottom data with HTML form can be done breezily.To upbuild modern embedded Ethernet control net is the purpose of the task's research work. Bottom controller is researched and designed in this work, whichABSTRACThas better performance and wide apply foreground.