摘要
海洋仪器通常采用TF卡进行数据存储,并采用异步收发传输(UART)方式从仪器内部读取。但该方式读取速率较慢,可靠性低,若拆开仪器取出TF卡读取,则容易因反复拆装仪器导致其密封性降低,存在进水风险。针对海洋仪器对数据传输速率、可靠性及自身密封性的要求,通过专用传输硬件电路及软件控制,设计了一套串行外设接口(SPI)模式存储数据和安全数字(SD)模式读取数据的双模式文件系统,实现了海洋仪器无需取出TF卡即可快速可靠读取数据。实验表明,该系统的数据传输速度比在UART方式下传输速度高2个数量级,可达20 MB/s。
TF card is usually used for marine instruments for data storage and the data are read from the instrument through asynchronous transceiver transmission(UART)mode. However, the reading speed is slow and the reliability is low. If the instrument is disassembled and the TF card is taken out for reading, its tightness may be reduced due to repeated disassembly and assembly, and there is a risk of water ingress. According to the requirements of marine instrument for data transmission rate, reliability and instrument sealing, a dual-mode file system of storing data serial peripheral interface(SPI)mode and reading data secure digital(SD)mode is designed through special transmission hardware circuit and software control, which realizes the marine instrument reading data quickly and reliably while the TF card is noe taken out. Experiments show that the data transmission speed of this system is two orders of magnitude higher than that in the UART mode, up to 20 MB/s.
作者
李春乾
张成伦
尹航
卢泽宇
李萌
LI Chunqian;ZHANG Chenglun;YIN Hang;LU Zeyu;LI Meng(Faculty of Information Science and Engineering,Ocean University of China,Qingdao Shandong 266000,China;R&D Center for Marine Instruments and Apparatuses,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao Shandong 266000,China)
出处
《电子器件》
CAS
北大核心
2023年第3期777-782,共6页
Chinese Journal of Electron Devices
关键词
海洋仪器
文件读取系统
双模式
传输速率
marine instruments
file reading system
dual mode
transmission speed
