The Design Of CAN/Ethernet Gateway Based On Embedded Linux

The Internet connects the office systems worldwidely with the communication systems and that makes it possible for the remote access to bottom information. At the same time,the field bus provides a foundation for the field devices to connect to the Internet directly. Ethernet is the most extensive LAN technology and easily connected to information network..The two-floor industry network control system which connects field and Ethernet,has been the prevalent mode of industry control system in home and abroad.Embedded technology has been a compositive technology which integrates computer configuration,computer sofeware and other technology relating to electronics.With the development of information and network technology,the embedded system is applied widely in all kinds of fileds.And in the field of embedded operation system,more people have focused their attention on Embedded Linnux because of its free,source code opening and strong network function,etc.As an outstanding field bus,CAN(Control Area Net)bus get more popularization and application in our country.So,the interconnection between CAN bus protocol and Ethernet protocol is discussed in this paper.The configuration of CAN/Ethernet gateway based on embedded Linux technology on the core of high-speed ARM7 processor LPC2292 is designed,and the exploitation environment is also founded in this paper,according to the purpose of the study. The main contents are as follows:The exploitation environment including hardware and software is choised,and the embedded uClinux operation system is explanted to the hareware platform.The CAN field bus node based on ARM7 is designed,and the bottom device CAN controller's driver based on embedded uClinux operation system is also programmed.At the same time,the communication between PC and ARM7 processor is carried out,as well as the data exchange between the above two protocols.At last,an embedded webserver is also completed for the gateway experiment test.The CAN/Ethernet gateway has already implemented its functions of data receiving and sending for CAN bus network through Ethernet,and its stability and usability are satistifed in the laboratory test.Above all,because of the explantation of uClinux operation system,the RTOS(Real Time Operation System) provides a good software development environment for users.The study of the gateway gives a better method for combination of fieldbus and Ethernet,and brings continued development of fieldbus and Ethernet extend through to industry control fields together in the future.