基于SAE AS5643协议分析及改进设计实现  

Improved Design and Implementation of SAE AS5643 Protocol

作　　者：何向栋 陈长胜 眭畅豪 HE Xiangdong;CHEN Changsheng;SUI Changhao(Aeronautical Computing Technique Research Institute,AVIC,Xi’an 710000,China)

机构地区：[1]中国航空工业集团公司西安航空计算技术研究所,西安710000

出　　处：《电光与控制》2023年第4期100-104,110,共6页Electronics Optics & Control

基　　金：国家某重点基金项目(MJ-2018-S-33)。

摘　　要：针对高速串行总线IEEE1394B的特点,分析在此基础上的SAE AS5643协议在航空安全关键领域的应用。研究了协议技术特点,分别对时间同步、数据通信、根节点、拓扑和带宽等确定性方面展开阐述,结合时间触发的优势,对AS5643协议进行改进,具体对时间触发调度、发送接收时刻等功能进行改进,提出了一种基于AS5643协议的时间触发调度设计架构,使其在未来高速(1.6 Gibit/s, 3.2 Gibit/s等)通信应用中进一步提升航空安全关键系统应用所需的鲁棒性和确定性。对实现的设计方案进行RTL级实现及仿真分析,验证了通信的正确性。According to the characteristics of IEEE1394B bus,a high-speed serial bus,the application of SAE AS5643 protocol in the key field of aviation safety is analyzed.The technical characteristics of the protocol is studied,and the deterministic aspects are expounded,such as time synchronization,data communication,root node,topology and bandwidth.Based on the advantages of time trigger,the AS5643 protocol is improved,the functions such as time trigger scheduling and sending and receiving time are improved,and a time trigger scheduling design architecture based on AS5643 protocol is put forward,so as to further improve the robustness and certainty required for the application of aviation safety critical systems in future high-speed(1.6 Gibit/s,3.2 Gibit/s,etc.)communication applications.RTL-level implementation and simulation analysis of the design scheme are conducted,which verify the correctness of the communication.

关 键 词：时间触发总线 安全关键系统 AS5643 IEEE1394B 时间同步 控制计算机(CC) 远程节点(RN) 启动帧(STOF) 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]