AudioAmp 9 click

AudioAMP 9 Click is a compact add-on board reproducing input audio signals with desired volume and power levels at sound-producing output elements. This board features the PAM8124, a 10W efficient, Class-D audio power amplifier from Diodes Incorporated for driving stereo speakers in a single-ended configuration.

click Product page

Click library

• Author : Stefan Ilic
• Date : Jan 2023.
• Type : GPIO type

Software Support

We provide a library for the AudioAmp 9 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for AudioAmp 9 Click driver.

Standard key functions :

• audioamp9_cfg_setup Config Object Initialization function.

  void audioamp9_cfg_setup ( audioamp9_cfg_t *cfg );

• audioamp9_init Initialization function.

  err_t audioamp9_init ( audioamp9_t *ctx, audioamp9_cfg_t *cfg );

• audioamp9_default_cfg Click Default Configuration function.

  void audioamp9_default_cfg ( audioamp9_t *ctx );

Example key functions :

• audioamp9_shutdown_on AudioAmp 9 shutdown on function.

  void audioamp9_shutdown_on ( audioamp9_t *ctx );

• audioamp9_mute_off AudioAmp 9 mute off function.

  void audioamp9_mute_off ( audioamp9_t *ctx );

• audioamp9_set_gain_level AudioAmp 9 set gain function.

  err_t audioamp9_set_gain_level ( audioamp9_t *ctx, uint8_t gain_level );

Example Description

This example demonstrates the use of the AudioAmp 9 Click board by changing the gain level.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs default configuration putting AudioAmp 9 Click into Gain 1 mode with unmuted output.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    audioamp9_cfg_t audioamp9_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    audioamp9_cfg_setup( &audioamp9_cfg );
    AUDIOAMP9_MAP_MIKROBUS( audioamp9_cfg, MIKROBUS_1 );
    if ( DIGITAL_OUT_UNSUPPORTED_PIN == audioamp9_init( &audioamp9, &audioamp9_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    audioamp9_default_cfg ( &audioamp9 );

    log_info( &logger, " Application Task " );
}

Application Task

Controlling the volume of the speaker by setting the gain level, and increasing it every 5 seconds until the maximum level is reached, then the sound is muted for 5 seconds.

void application_task ( void ) 
{
    for ( uint8_t vol_lvl = AUDIOAMP9_GAIN_LEVEL1; vol_lvl <= AUDIOAMP9_GAIN_LEVEL4; vol_lvl++ )
    {
        audioamp9_set_gain_level( &audioamp9, vol_lvl );
        log_printf( &logger, " Volume gain level %d \r\n ", vol_lvl );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
    }

    log_printf( &logger, " Sound is muted \r\n " );
    audioamp9_mute_on( &audioamp9 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf( &logger, " Sound is unmuted \r\n " );
    audioamp9_mute_off( &audioamp9 );
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.AudioAmp9

Additional notes and informations

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. UART terminal is available in all MikroElektronika compilers.