Research And Application Of Embedded Can / Ethernet Gateway

The paper introduces the development and applications of embedded CAN-bus/Ethernet gateway. To get the function of industrial computer& Can Adapter, CAN-bus/Ethernet gateway is to be developed. The gateway takes the CAN nodes into Ethernet and it makes cost of the monitor system lower and performance better.Embedded CAN-bus/Ethernet gateway controls RTL8029AS NIC using TMS320LF2407A and realizes TCP/IP protocols in software. Main contents of the paper are as follows.1. The design of PCI master interface using CPLD is introduced in this paper. The interface acts as a bridge between CPU and NIC. It realizes sending and receiving of Ethernet frame.2. The migration of Operating system- u c/os-II on TMS320LF2407 is introduced in this paper. The RTOS provides a good software development environment for users.3. The program of applications based onu c/os-II is described in the paper. The software realizes protocols converting.4. The program of monitor software and using of sniffer tools are introduced. They help debug and test the gateway.The gateway is used in reconstruction of a monitor system based on CAN-Bus and has good performance. The study and application of CAN-Bus/Ethernet gateway gives a better method for combination of f ieldbus and Ethernet. The introduction of these gateways brings development of fieldbus and Ethernet in industry control fields together in the future.