基于SPI协议的双DSP通讯设计与实现  

Design and implementation of dual DSP communication based on SPI protocol

作　　者：李增科[1] 李云鹏[1] 席东学 Li Zengke;Li Yunpeng;Xi Dongxue(Lanzhou Institute of Space Technology Physics,Lanzhou 730000,China)

机构地区：[1]兰州空间技术物理研究所,兰州730000

出　　处：《电子测量技术》2020年第19期159-164,共6页Electronic Measurement Technology

摘　　要：针对科学研究领域范围的不断深入,空间探测技术日益增强,对探测仪器满足科学目标提出更高的要求。既要求仪器完成基本功能及性能指标外,重点集中在自轨控制和交互式能力提升。以我国构建空间站发展框架为背景,从工程化应用为出发点,精确测量空间实验舱微重力水平及宇航员活动环境评估,设计微重力测量仪器来表证,仪器内部采用双DSP互通构架系统,处理器之间采用SPI通信协议技术协同。实现目标的结果为外部数据传输速度由由0.3 Mb/s变为100 Mb/s,大幅度解决了采样数据快,传输数据慢的技术瓶难题。同时提高了处理器余裕量,增强了系统可靠性。结果表明该设计理念成功应用于飞行器实验舱测量分系统中,仪器在轨性能良好,为任务完成提供科学依据。这一技术拓宽了在航天领域的工程应用范围。同时对其他领域的推广和应用具有借鉴和参考价值。In view of the deepening of scientific research field,space exploration technology is increasing,which puts forward higher requirements for exploration instruments to meet scientific objectives.The instrument is required to complete basic functions and performance indicators,and the focus is on self-orbit control and interactive capability improvement.Taking the construction of space station development framework in China as the background,starting from the engineering application,the microgravity level of space experiment cabin and astronaut activity environment assessment are accurately measured,and a microgravity measuring instrument is designed for demonstration,in which a dual DSP intercommunication framework system is adopted,and SPI communication protocol technology is adopted for cooperation among processors.The result of achieving the goal is that the external data transmission speed is changed from 0.3 Mb/s to 100 Mb/s,which greatly solves the technical bottle problem of fast data sampling and slow data transmission.At the same time,the processor margin is improved and the system reliability is enhanced.The results show that the design concept has been successfully applied to the measurement subsystem of aircraft experimental cabin,and the instrument has good on-orbit performance,which provides scientific basis for task completion.This technology broadens the engineering application range in the aerospace field.At the same time,it has reference value for the popularization and application in other fields.

关 键 词：DSP SPI 通信协议 测量技术 

分 类 号：V442[航空宇航科学与技术—飞行器设计]