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AVR32709: AVR32 UC3 Audio Decoder Over USB - page 6 / 29

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5.2.1

5.2.2

6

Figure 5-1.

Audio Player Navigators Overview

Navigators

Disk Navigator: “browse into the tree architectures of the mass storage device” The “Disk Navigator” is similar to a file explorer. It is used to navigate in the tree architectures of the connected USB device. It will hide all files whose extension differs from *.mp3, *.pls, *.smp or *.m3u. Note that the file extension filtering is automatically updated according to the modules selected (MP3, playlists, ...).

The “Disk Navigator” is totally independent from the “Audio Navigator”.

The commands associated with this module are used to navigate into the disks/directories and to synchronize the selected file/folder with the “Audio Nav” module. This synchronization is made with these two commands ai_nav_getplayfile and ai_audio_nav_playfile. See “Disk Navigation” on page 8. for a complete list of commands.

Audio Navigator: “manage a list of playable songs” The “Audio Navigator” deals with a list of files. This list is defined once a ai_audio_nav_playfile command is executed. This command sets the list of files to be played according to the current selection in the “Disk Navigator“ and to the “Audio Navigator” ai_audio_nav_expmode_set option.

W h e n t h e a i _ a u d i o _ n a v _ p l a y f i l e c o m m a n d i s e x e c u t e d :

playlist will be included in the “Audio Navigator” file list.

tly pointing on a disk or a file, then the file list will depend on the audio explorator mode (set by the ai_audio_nav_expmode_set command):

AVR32709

7817D–AVR32–05/11

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