ARM Based On The CAN Bus And Ethernet Interconnect System Design

At present,the majority of embedded automation systems are based on MCU,which achieve a certain function with a number of monitoring,servo, display device etc.Information is often stop at the scene "live".Embedded automation systems become the "information island",that has seriously hampered the development of itself.In order to realizing large-scale information integration and comprehensive implementation of automation,a communication system that can be run in the industrial environment,has high reliability and good real-time, forms the bottom of industrial field networks and completes multi-point communication between automation equipments at the scene.Ethernet and the CAN-bus(Controller Area Network) is the most widely used by Intemet technology and open field bus in the world.With the closer combination of measurement-control technology and network technology,easurement-control system connected to the Intemet has become a trend,which led to the rapid development of embedded network technology in recent years.Ethernet technology is at stage of rapid development,which will lower costs and simplify the structure of the system.With the technology development and needs,a combination will be a huge driving force of the rapid development of control field.In this paper a high-performance embedded CAN-Ethemet Gateway based ARM7 processor core is designed,which can be used to achieve solid concise communication between the monitoring equipments and field devices,to complete real-time measurement and control of large-scale equipment. Main content in this paper as follows:1) Design concepts and the overall structural design of CAN-Ethernet interconnected system based MCU LPC2290;2) Design of the conversion circuit and extemal interface circuit of CAN-Ethernet interconnection system,realization of communication between MCS-51 Microcontroller and CAN bus MCP2510;3) Transplant ofμC / OS-Ⅱoperating system in LPC2290,as well as design and implementation of the application software of interconnection system;4) Design of the core switching module of CAN-Ethemet interconnect system;5) Realization of Web services with HTTP protocol,and realization of remote measurement and control of field devices through Web pages.