摘要
数字信号处理系统会产生大量数据,基于TMS320C6747数字信号处理器介绍一种SD卡结合FAT32文件系统的方案用于解决这些数据的存储和转移问题。硬件方面,在SD模式下采用DMA控制进行数据传输以提高扇区读写速率;软件方面,实现符合FAT32规范的文件系统操作,具有自动创建文件,以固定长度数据为单位写入文件,快速搜索空闲簇等特点,尽量减少扇区读写次数,以最大限度地满足语音数字信号处理系统大量数据的连续存储要求。
Digital signal acquisition system always produce a large number of data. This paper combines the SD card and FAT32 file system based on TMS320C6747 to solve the problem of storage and transfer about the data. On one hand, the hardware uses 4 line SD mode to improves the data transmission rate and uses DMA for data access to reduce the processor intervention ; On the other hand, the software optimizes the FAT32 file system to reduce the read and write times of the SD card. To meet the requirements of continuous storage of large amounts of data, there are some features of the optimized file system. Such as create new file automatically, write into the file with block data, search the free cluster in a quick way.
出处
《电声技术》
2015年第12期30-34,共5页
Audio Engineering
