Arduino mp3 player (II)

 < Arduino MP3 Player I (circuit) 

The SD structure

In this post I'll try to explain a little the code of  our 'Jukebox' Arduino hearted .
The main problem I found for this project, was the limitation SD library, with reduced FAT which only allowed the names in 8.3 format.
The solution was to create a small catalog in a text file from which to read the entries.

The directory structure on the SD has the following format:

raiz
 +-artistas.txt
 +-[ARTIST01]
 |   +-album.txt
 |   +-[ALBUM01]
 |   |   +-track.txt
 |   |   +-track001.mp3
 |   |   +-track002.mp3
 |   |   .....
 |   |   +-track0nn.mp3
 |   +-[ALBUM02]
 |   .......
 |   +-[ALBUMnn]
 +-[ARTIST02]
 .....
 +-[ARTISTnn]

This means there are three levels: artist, album and track. Each level has a text file with the catalog entries (a line of text for each artist, album or song).
The names of the folders and files must be such as are in the scheme (you can always change the code).
It's a bit cumbersome to create the card, but ... worthwhile. I used a program that makes it much easier MP3Tag, enabling export to text tracks of a directory and rename mp3.

Arduino MP3 Player (I)

Arduino Mp3 Payer II (code)   >

I present this new Arduino project: A full MP3 player based on Arduino.
As you can see in the photo, the idea was to build a standalone player, in the style of antique radios or 'tapes', in the age of Iphones ....
The player uses a small module based on the VS1002d chip (now discontinued, but who had a drawer). The module in question I bought at  Futurlec . Currently you can get similar modules on ebay for a bit more than 10$, although the chip is the VS1003 o VS1053. You can also use a SparkFun MP3 shield, but significantly more expensive (this shield already includes an SD slot).
The three chips are quite compatible in terms of programming, and indeed almost all initialization the I have taken from the library to the SparkFun MP3 Shield ;-)