Library Description

The library covers all the necessary functions to control AudioAmp Click board. Library have drivers for set volume lvl ( CH1, CH2 or MUX ), enable and disable amplifier function, set mute and unmute mode function, etc.

Key functions:

• void audioamp_setInput( uint8_t inputMode ) - Set input mixer mode function.

• void audioamp_enable() - Enable function.

• void audioamp_setVolume( uint8_t volumeValue ) - Set volume function.

Examples description

The application is composed of the three sections :

• System Initialization - Initializes GPIO, I2C and LOG structures, sets INT pins as input.
• Application Initialization - Initialization driver enable's - I2C, turn on the Audio Amp click and start write log.
• Application Task - (code snippet) This is a example which demonstrates the use of AudioAmp Click board. These examples first adjust the volume to level 15 ( max. lvl. 32 ) for 10 seconds, after that, adjust the volume to level 5 for 15 seconds and finally, adjust the volume to level 10 for 20 seconds.
  Results are being sent to the Usart Terminal where you can track their changes.

void applicationTask()
{   
    mikrobus_logWrite( " Set volume to lvl 15 ", _LOG_LINE );
    mikrobus_logWrite( " for the next 10 sec. ", _LOG_LINE );
    audioamp_setVolume( 15 );
    Delay_ms( 10000 );
    mikrobus_logWrite( "----------------------", _LOG_LINE );

    mikrobus_logWrite( " Set volume to lvl 5 ", _LOG_LINE );
    mikrobus_logWrite( " for the next 15 sec. ", _LOG_LINE );
    audioamp_setVolume( 5 );
    Delay_ms( 15000 );
    mikrobus_logWrite( "----------------------", _LOG_LINE );

    mikrobus_logWrite( " Set volume to lvl 10 ", _LOG_LINE );
    mikrobus_logWrite( " for the next 20 sec. ", _LOG_LINE );
    audioamp_setVolume( 10 );
    Delay_ms( 20000 );
    mikrobus_logWrite( "----------------------", _LOG_LINE );

    mikrobus_logWrite( " Mute mode ", _LOG_LINE );
    mikrobus_logWrite( " for the next 5 sec. ", _LOG_LINE );
    audioamp_muteMode();
    Delay_ms( 5000 );
    mikrobus_logWrite( "----------------------", _LOG_LINE );

    mikrobus_logWrite( " Unmute mode ", _LOG_LINE );
    audioamp_unmuteMode();
    Delay_ms( 100 );
    mikrobus_logWrite( "----------------------", _LOG_LINE );
}

Other mikroE Libraries used in the example:

• I2C
• UART

Additional notes and information

Depending on the development board you are using, you may need USB UART click, USB UART 2 click or RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.