硬盘MP3源码

说明：  AT89C51SND1C 解码芯片做的硬盘MP3，现在只支持一块硬盘，一个分区只支持根目录歌曲播放，不支持文件夹。只支持FAT32文件系统，部分MP3文件不能解码．
(AT89C51SND1C decoder chips do drive MP3, now only support a hard drive, a sub-directory only support music playback, support folder. Only support FAT32 file system, not part of decoding MP3 files.)