audioamp2

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Audio Amp 2 Click

AudioAmp 2 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

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Click Library

• Author : MikroE Team
• Date : Dec 2019.
• Type : GPIO type

Software Support

Example Description

This application amplifies the sound on the speakers.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.AudioAmp2

Example Key Functions

• audioamp2_cfg_setup Config Object Initialization function.

void audioamp2_cfg_setup ( audioamp2_cfg_t *cfg );

• audioamp2_init Initialization function.

err_t audioamp2_init ( audioamp2_t *ctx, audioamp2_cfg_t *cfg );

• audioamp2_set_mode Mode Set function.

uint8_t audioamp2_set_mode( audioamp2_t *ctx, uint8_t sel_mode );

• audioamp2_set_gain Gain Set function.

uint8_t audioamp2_set_gain( audioamp2_t *ctx, uint8_t sel_gain );

• audioamp2_check_diagnostic Diagnostic Check function.

uint8_t audioamp2_check_diagnostic( audioamp2_t *ctx );

Application Init

Initializes GPIO driver and puts device in Standby Mode as default operation mode and selects 20dB as default gain selection.

void application_init ( void )
{
    log_cfg_t log_cfg;
    audioamp2_cfg_t 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 ----");

    //  Click initialization.

    audioamp2_cfg_setup( &cfg );
    AUDIOAMP2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    audioamp2_init( &audioamp2, &cfg );
    Delay_ms ( 100 );
    
    log_printf( &logger, "AudioAmp 2 is initialized \r\n \r\n" );
    Delay_ms ( 200 );
}

Application Task

Activates Mute operation mode for 4 seconds and after that activates Play mode. When the device is in Play mode then changes the gain selection, first sets the minimum gain (20dB) for 8 seconds and then sets the maximum gain (32dB) for 8 seconds too.

void application_task ( void )
{
    audioamp2_set_mode( &audioamp2, AUDIOAMP2_MUTE_MODE );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    audioamp2_set_gain( &audioamp2, AUDIOAMP2_20DB_GAIN );
    audioamp2_set_mode( &audioamp2, AUDIOAMP2_PLAY_MODE );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    audioamp2_set_gain( &audioamp2, AUDIOAMP2_32DB_GAIN );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

Note

Internally, the gain is set by changing the feedback resistors of the amplifier.

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

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