Design Of The Embedded I/O Module Based On Devicenet

As the development of the field bus, DeviceNet also undergoes unprecedented development. However, deviceNet is more lagging in China than that in other countries of Europe. But deviceNet has greater space of development and application than other field bus, because it has some superiorities such as stability, real-time and efficiency.The system referred in the paper consists of DeviceNet master station based of PCI and microprocessor and slave station based of embedded I/O module. DeviceNet master station contains PCI and the configuration software of host computer. And embedded I/O module contains ARM LPC2129, extended CAN transceivers, RS232serial port, external memory and DIP switch. On the base of embedded hardware, transplant the code of the DeviceNet slave station, Send and receive the CAN data using ARM processor and complete message parsing. Embedded I/O module enjoys the advantage of high level of integration, small and cost-effective.First, the paper introduced the development of field bus, the significance of the research, the project requirement and scheme selection. By comparing the advantages and disadvantages of all the exited design determine the design of our system. Secondly, the paper describes the circuit design of embedded I/O module, the software design of the slave station and the design of the configuration software in master station in detail. Finally, by setup testing environment, complete the communication between master station and slave station, and complete control of master station to I/O module of the embedded slave station. By analyzing and verifying, the experimental result achieves the desired purpose. Meanwhile, the further research area is put forward.By communication test between embedded I/O module and, the result verified correctness and stability of this system design. This design achieves the expected requirement in function and performance, which has Clear structure and perfect function. It is verified that the design of the embedded I/O module is consistent with that of DeviceNet slave station. The design is provided with some features of real-time and stability. The research expands the application of the DeviceNet, which provides some references for the further development of DeviceNet.