Design of U Disk High Speed Reading System
Journal Title: 河南科技大学学报（自然科学版） - Year 2019, Vol 40, Issue 2
Abstract
In order to prevent computer data from being stolen by the U disk and causing information leakage, a unidirectional high-speed reading U disk system based on optical fiber was proposed, which allowed the data to be accurately transmitted in one direction. Based on the Linux system platform, pipe technology was adopted to realize data transmission of packaged files by NAND FLASH interface. Optical fiber was used as data transmission method, and the data encoding and decoding module was designed based on field programmable gate array. By studying the characteristics of synchronous transmission and Manchester encoding, a data encoding transmission method with clock line was designed to realize high speed and accurate transmission. The high-speed USB was adopted to communicate with upper monitor. FIFO cache scheme was designed by using SDRAM to overcome the interference of USB data transmission. The experimental results show that the speed of U disk transmission can be above 15 MB/s of the three file systems of FAT32, exFAT and NTFS, and the accuracy of file transmission is up to 100%, which can meet the needs of unidirectional reading U disk system.
Authors and Affiliations
Qiaoyu XU, Peng MAO, Junwei WANG, Jinxia LIU
Keywords
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- DOI 10.15926/j.cnki.issn1672-6871.2019.02.003
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