AudioAmp Click

AudioAmp Click is a compact add-on board that can add a mono audio amplifier function to your application. This board features the LM48100Q-Q1, a Boomer™ mono 1.3W audio power amplifier with output fault detection and volume control from Texas Instruments. The AudioAmp Click has one dual 3.5mm audio input jack and, next to it, a screw terminal for connecting output wires to a 1.3W, 8 Ohm passive speaker. Each input has its own independent 32-step volume control.

Click Product page

Click library

• Author : MikroE Team
• Date : Jan 2020.
• Type : I2C type

Software Support

We provide a library for the AudioAmp 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for AudioAmp Click driver.

Standard key functions :

• audioamp_cfg_setup Config Object Initialization function.

  void audioamp_cfg_setup ( audioamp_cfg_t *cfg ); 

• audioamp_init Initialization function.

  err_t audioamp_init ( audioamp_t *ctx, audioamp_cfg_t *cfg );

Example key functions :

• audioamp_set_volume Set volume function.

  err_t audioamp_set_volume ( audioamp_t *ctx, uint8_t in_sel, uint8_t volume_level );

• audioamp_power_on Turn on the Audio Amp Click function.

  err_t audioamp_power_on ( audioamp_t *ctx );

• audioamp_mute Mute input function.

  err_t audioamp_mute ( audioamp_t *ctx );

Examples Description

AudioAmp Click is a stereo audio amplifier which can be controlled by using this Click driver.

The demo application is composed of two sections :

Application Init

Performs driver and log module initialization, enables I2C, turns on the AudioAmp device and sends a message about init status.

void application_init ( void )
{
    log_cfg_t log_cfg;

    /** 
     * 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... ----" );

    audioamp_cfg_t audioamp_cfg;

    //  Click initialization.

    audioamp_cfg_setup( &audioamp_cfg );
    AUDIOAMP_MAP_MIKROBUS( audioamp_cfg, MIKROBUS_1 );

    if ( audioamp_init( &audioamp, &audioamp_cfg ) == AUDIOAMP_INIT_ERROR )
    {
        log_info( &logger, "---- Application Init Error. ----" );
        log_info( &logger, "---- Please, run program again... ----" );

        for ( ; ; );
    }

    log_info( &logger, "---- Application Init Done. ----" );
    log_info( &logger, "---- Application Running... ----" );
    log_info( &logger, "---- Check your audio speaker. ----\n" );

    audioamp_power_on( &audioamp );
}

Application Task

This is a example which demonstrates the use and control of the AudioAmp Click board.

void application_task ( void )
{
    log_info( &logger, "---- Volume level control testing... ----" );

    audioamp_set_volume( &audioamp, AUDIOAMP_IN_1 | AUDIOAMP_IN_2, 5 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    audioamp_set_volume( &audioamp, AUDIOAMP_IN_1 | AUDIOAMP_IN_2, 15 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    audioamp_set_volume( &audioamp, AUDIOAMP_IN_1 | AUDIOAMP_IN_2, 25 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    audioamp_set_volume( &audioamp, AUDIOAMP_IN_1 | AUDIOAMP_IN_2, 32 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_info( &logger, "---- Volume level control test done. ----" );
    log_info( &logger, "---- Input mute/unmute control testing... ----" );

    audioamp_mute( &audioamp );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    audioamp_unmute( &audioamp );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_info( &logger, "---- Input mute/unmute control test done. ----" );
}

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.AudioAmp

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.