Atmel AT89C51SND1C, Руководство пользователя

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Operating Description
3-12 Firmware Package User Guide
4209A–MP3–12/02
Figure 3-3. Splash Screen
3.4 Mode Selection
After the set-up phase, the firmware enters the song operating mode. In all operating
modes, the mode can be sequentially changed using the “Mode” key with the following
order:
n
Song mode
n
Voice mode
n
Tool mode
Download operating mode is entered automatically when connecting the board to the
PC through the USB connection.
All these operating modes are detailed in the following sections.
3.5 Song Operating
Mode
This mode is the MP3 song player. It gathers together all the standard features of a por-
table player. It displays the FAT file names in DOS 8.3 or VFAT long format.
Figure 3-4. Display in Song Playing Mode
3.5.1 Keypad Functions Table 1 details the functionality of each key depending on the current state.
Table 1. Song Mode Key Function
AT8x51SND1 DEMO
FIRMWARE V2.0.X
15 0:00
Song Name.mp3
Lock Status
Song Name
Playing Repeat Sound Player
Player State
Icon
Memory
Icon Level Icon Time
Key Description
Sound Control
Select the volume or bass or medium or treble control.
Memory Control (stop state)
Make a selection between the on-board FLASH memory, the MMC 1 or the
MMC 2 card.
Next Song (play state)
Play next mp3 file in current directory.
Next Selection (stop state)
Select next mp3 file or directory in current directory.