SmartGPU2-LCD480X320Touch-CommandSet

SMART GPU 2 3.5” TOUCH

Command Set

2.7.4 Advance WAV File – 41hex - A ascii

Commands (host)

4 bytes

1.- 0x41 (hex), A (ascii). *Audio Command.

2.- 0x41 (hex), A (ascii).

3.- File second high byte.

4.- File second low byte.

Responses (device)

1 byte

1.- 0x4F (hex), O (ascii) – success ACK or

0x46 (hex), F (ascii) – fail NAK.

Description

This command advances/rewinds the currently

playing audio file, to the desired File Second

parameter.

If File Second parameter is sent as 0(dec), it

means the audio file will play from the second 0 or

beginning.

The maximum acceptable value of File Second

parameter is the file duration in seconds.

If the File Second parameter exceeds file duration

in seconds obtained with “Play WAV File”, the

command will fail with NAK as response and audio

file will stop playing.

To avoid strange/undesired sound output while the

audio file is being advanced or rewind, user can set

first “Pause WAV File” command to toggle pause,

then advance/rewind file, and finally set again ”Pause

WAV FIle” to resume file playing.

This command is only valid when an audio file is

being played, otherwise will always return NAK.

Example (sent commands)

Example 1:

<41,41,00,64> Advance Audio File to second

100(dec).

Example 2:

<41,41,00,00> Rewind Audio File to second 00(dec).

All data is in hex.