基于STA013的SD卡的MP3开发，以比特流的方式访问的。能够访问根目录下的文件,不支持子目录,不支持长文件名。-Based on the development STA013 MP3 SD card, by way of bitstream access. Able to access the root directory of the file, does not support the subdirectory does not support long file names.