基于EPA协议的工业现场嵌入式以太网控制器研究

Research on industry embedded ethernet controller based on EPA

在充分分析了EPA通信模型的基础之上,应用AT91R40008与非PCI总线以太网控制器AX88796等相关器件,提出了EPA网络控制器的硬件设计与实现;针对AX88796的软件驱动模块,作了详尽的阐述,并给出了核心代码;就EPA通信模型的重要模块:EPA服务、映射套接字接口、时间同步等模块的软件实现作了深入研究。该系统通过了EPA一致性和EPA互操作性等测试平台的测试。

Fully analyzing the ethernet for plant antomation （EPA） protocol model, the design and realization of EPA ethernet controller were offered, using AT91 R40008, AX88796 and other components, the driver module of AX88796 chip was discussed deeply and the core code was given, the important module of EPA communication model was researched, such as EPA services, mapping socket interface, time synchronization, etc. The system has passed through conformance and interoperation tests.