基于FPGA的MDIO总线切换技术  

Technology of MDIO Bus-Switching based on FPGA

作　　者：车倜贲[1] 卿粼波[1] 何小海[1] 

机构地区：[1]四川大学电子信息学院图像信息研究所,四川成都610064

出　　处：《成都信息工程学院学报》2012年第6期569-573,共5页Journal of Chengdu University of Information Technology

基　　金：四川省科技支撑计划资助项目(2010GZ0167)

摘　　要：为了在高速图像处理平台特定的网络结构中实现两片DSP与PHY芯片通过一个管理数据输入输出接口(Management Data Input/Output,MDIO)进行通信,利用VHDL语言实现了一个总线切换功能,并设计了一个MDIO总线信号捕获状态机,用该态机的输出来作为双向端口的控制信号,实现了MDIO总线信号在FPGA上实时透明双向传输和两条MDIO总线的实时切换。配合TI公司的网络开发套件,保证了平台正常的网络运行。In order to realize the communication between two DSP and PHY chip via only one MDIO interface in the High-speed image processing platform, according to the platform＇s special network structure, a function of bus switching has been implemented by VHDL and a MDIO bus signal capture states machine has been designed. The output of the states machine is used as the control signal of the binary port to ensure the real-time transparent binary transmission of the MDIO bus signal and bus switch on the FPGA. With the help of Network Development Kit （NDK） which provided by the Texas Instruments Inc. , the platform perform well in network.

关 键 词：计算机网络 管理数据输入输出接口 双向端口 FPGA 总线切换 状态机 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]