Research Of CAN Filed-Bus Controller Based On Embedded Web

As the automation degree of the corporation becomes higher, Field Bus technique was widespread availability in Industrial process;At the meantime , Ethernet technique play a more and more important role during the corporation informational process. Along with the informational degree of the corporation increasing, the related research have very important actual means and extension value to carry out that the corporation information intranet interconnects with the Field Bus, and already becoming a large investigation hotspot now.Corporation information intranet has singularity standard, take Ethernet as main block. But Field Bus has a great variety of standards. Based on analyzed the present status of the Field Bus technic seriously, and refer to the national standards. In this article we choose CAN Bus. ARM processor was chosen as embedded platform, realized the information connection between Ethernet and CAN Bus. In this basic, we also present a way to connect the information between Ethernet and CAN Bus: Using construct a dynamic Web page on embedded platform to monitor the Field data in CAN Bus.In this paper, the design and realize method of the hardware and software are presented. About hardware platform, LPC2129 which is based on a 16/32 bit ARM7TDMI-S^TM CPU core was selected. In LPC2129, two interconnected CAN interfaces with advanced acceptance filters are intergrated, it is designed for CAN Bus application.RTL8019AS was chosen as Ethernet controller. To achieve high EMC perfomence,many methods were applied, such as optoelectronic isolation, shield, CPU supervisory and WDT. About software platform, the Real-time embedded OS--μC/OS-Ⅱ was chosen. CAN bus drivers and embedded TCP/IP stack were realized based onMC/os-n.At last, embedded Web server was designed based on TCP/IP stack. Dynamic Web page was realized to present Field data, and control function could be achieved by embedded CGI software.