Implementation of EPA communication model in embedded Linux system

With the development of Ethernet and industry automatization control system,there is a great breakthrough using Ethernet in the field of industry control.Based on digital data communications for measurement and control-EPA for use in industrial control sys-tem,aimed at the characteristic of the EPA communications model,used MOTOROLA MPC823 hardware platform,established embedded Linux system,also used the methodof development and design of embedded Linux system andthe multitask model withthread,implemented the EPA communications model and the communications between the field devices.