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 module

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两个组成部分；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控制在800ns-1000ns，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。

Abstract:

According to the actual requirements of remote distributed simulation and testing system, a design scheme of remote multi-function node is proposed, and a high-speed photoelectric conversion interface unit with high-speed SFP optical fiber communication and reflective memory network as the core technology is constructed; the interface unit consists of two parts: optical fiber converter and multi-functional interface module; the multi-function interface module takes FPGA as the control core, uses PMC and XMC structures for reference, adopts the hardware architecture form of the combination of universal motherboard and a variety of 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 the motherboard and the 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 at 800ns-1000ns, which meets the requirements of transmission distance and real-time when data interaction between distributed simulation nodes.