反射内存高速光电转换接口单元设计与实现  

Design and Implementation of Reflective Memory High-speed Photoelectric Conversion Interface Unit

作　　者：王廷凯 周强[1] 武元 WANG Tingkai;ZHOU Qiang;WU Yuan(College of Automation Science and Electrical Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100191

出　　处：《计算机测量与控制》2023年第8期183-189,共7页Computer Measurement &Control

摘　　要：针对远程分布式仿真测试系统的实际需求,提出了远距离多功能节点的设计方案,构建实现了以高速SFP光纤通信和反射内存网络为核心技术的高速光电转换接口单元;接口单元包括光纤转换器和多功能接口模块;其中多功能接口模块以FPGA为控制核心,借鉴PMC以及XMC结构,采用通用式母板与多种专用子板组合的硬件架构形式,实现了数字IO、LVDS、RS422、ARINC429、模拟量等多种通用接口,提高了硬件资源的复用性;母板与子板间通信选用GTX作为物理层,并设计了专用的通信协议帧格式,通过Verilog编程实现了协议的解析与通信控制,既实现了多种电信号接口的集成,又具有低数据处理延时的突出特点;实验测试表明,模块的数据处理延时可稳定控制在800~1000 ns,满足了分布式仿真节点间数据交互时对传输距离和实时性的要求。According to the actual requirements of remote distributed simulation and testing system,a remote multi-function node design scheme is proposed,and a high-speed photoelectric conversion interface unit is constructed to realize the high-speed SFP optical fiber communication and reflective memory network as the core technology;the interface unit consists of optical fiber converter and multi-functional interface module;The multi-function interface module takes FPGA as the control core,refers to PMC and XMC structures,adopts the hardware architecture form of the combination of universal motherboard and multiple special sub boards,realizes a variety of universal interfaces such as digital IO,LVDS,RS422,ARINC429,analog quantity,and improves the reusability of hardware resources;GTX is selected as the physical layer for the communication between motherboard and sub boards,and a special communication protocol frame format is designed;the protocol analysis and communication control are realized through Verilog programming,which not only realizes the integration of multiple electrical signal interfaces,but also has the outstanding characteristics of low delay;the experimental results show that the data processing delay of the module can be stably controlled by 800 ns to1000 ns,which meets the requirements of transmission distance and real-time when the data interaction between distributed simulation nodes.

关 键 词：FPGA 反射内存 高速光纤 低延时 

分 类 号：TP334.7[自动化与计算机技术—计算机系统结构]