Decode MP3 file in the filesystem based on the FLASH.

Helix library: Decoder the MP3 file to WAV.

NOR FLASH Driver: The data is stored in the NOR FLASH. Support Winbond and GD FLASH. The supporting cound be extented. Very effective.

USB MassStorage: Transmit the MP3 file to the NOR FLASH. Get the WAV file from the NOR FLASH. PageSize is 4096 Bytes.

FAT FS: Visit the MP3 file and write the WAV file when decoding.

未增加Helix时，Code=19048 RO-data=580 RW-data=436 ZI-data=26916 将扇区大小从4k改为512字节后，Code=13196 RO-data=580 RW-data=436 ZI-data=8484