一种合并单元数字量输出及其以太网通信技术的研究

摘要

研究了一种利用自带EMAC/MDIO外设的数字信号处理器TMS320C6747和物理层收发器KSZ8001实现电子式互感器合并单元数字量输出及其以太网通信的技术方案,给出了方案的硬件连接电路图.该方案主要通过RMII接口实现数据的传输和控制,通过软件设置缓存描述符实现数字量按规定帧格式组帧,同时设置相关寄存器完成物理层收发器网络传输的控制.给出了具体的程序流程图,并在CCS_v3.3开发环境下完成软件编程.实验实现了多路电子式互感器数据流采样、按规定组帧并经网口收发的功能.实验结果证明了该方案的可行性与准确性.%A technical solution based on DSP TMS320C6747 with EMAC/MDIO peripheral and transceiver KSZ8001 at physical layer is introduced with its hardware connection circuit to realize the digital output of merging unit and its Ethernet communication. The data transmission and control is implemented by RMII interface and the digital data streams are framed in prescribed format by buffer descriptor setting. The network transmission control of transceivers at physical layer is implemented by register setting. The program flowchart is provided and the software is programmed in CCS_v3.3 developmental environment. The experiment realizes the sampling of data streams from a group of electronic transformers and their transmission via Ethernet interface in defined frame,which proves the feasibility and accuracy of the given solution.