CAJ | 학술논문

为满足嵌入式环境中文件系统精准的提供时间功能,使存储在外部介质 SD 卡中的文件包含创建、修改、访问等详细时间信息,提出采用高精度实时时钟芯片 DS3231为文件系统提供连续精准的时间信息的解决方案。介绍了 SD 卡存储结构,详细探讨了 FAT32文件系统在嵌入式环境中的移植方法,设计了 DS3231与 C8051F500单片机进行通信时的硬件接口连接,通过 I2 C 总线实现对 DS3231时间信息的读写。系统测试表明,DS3231能够连续不断地给嵌入式文件系统提供精准时间信息。
위만족감입식배경중문건계통정준적제공시간공능,사존저재외부개질 SD 잡중적문건포함창건、수개、방문등상세시간신식,제출채용고정도실시시종심편 DS3231위문건계통제공련속정준적시간신식적해결방안。개소료 SD 잡존저결구,상세탐토료 FAT32문건계통재감입식배경중적이식방법,설계료 DS3231여 C8051F500단편궤진행통신시적경건접구련접,통과 I2 C 총선실현대 DS3231시간신식적독사。계통측시표명,DS3231능구련속불단지급감입식문건계통제공정준시간신식。
In order to provide the accurate time information of file system in embedded environment and make files stored in the external SD card contain detailed time information about creation,modification and access.The paper proposes a solution that high-precision real-time clock chip DS323 1 provides continuous accurate time information to the file system.The paper introduces the storage structure of SD card,discusses the transplant method of FAT32 file system in embedded environment,designs hardware connection interface between DS323 1 and microcontroller C805 1F500,and realizes the read/write operation of time information of DS323 1 by I2 C bus.System test shows that DS323 1 can continuously provide accurate time information to the embedded file system.