Volume Click

Volume Click is a compact add-on board that provides the user with complete digital volume control. This board features the CS3310, a stereo digital volume control designed specifically for audio systems from Cirrus Logic.

Click Product page

Click library

• Author : Stefan Nikolic
• Date : nov 2020.
• Type : SPI type

Software Support

We provide a library for the Volume 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 Volume Click driver.

Standard key functions :

• Config Object Initialization function.

  void volume_cfg_setup ( volume_cfg_t *cfg );

• Initialization function.

  err_t volume_init ( volume_t *ctx, volume_cfg_t *cfg );

• Click Default Configuration function.

  void volume_default_cfg ( volume_t *ctx );

Example key functions :

• Set volume gain function.

  err_t volume_set_vol_gain ( volume_t *ctx, float volume_left_dB, float volume_right_dB );

• Power Up function.

  void volume_power_up ( volume_t *ctx );

• Hardware MUTE function.

  void volume_hw_mute ( volume_t *ctx, uint8_t mute_state );

Examples Description

This example sets up the device and performs volume turn up and down.

The demo application is composed of two sections :

Application Init

Initializes drivers and powers up the device.

void application_init ( void ) {
    log_cfg_t log_cfg;  /**< Logger config object. */
    volume_cfg_t volume_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.

    volume_cfg_setup( &volume_cfg );
    VOLUME_MAP_MIKROBUS( volume_cfg, MIKROBUS_1 );
    err_t init_flag  = volume_init( &volume, &volume_cfg );
    if ( init_flag == SPI_MASTER_ERROR ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

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

Application Task

Circles the volume from -40 [dB] to 10 [dB] back and forth.

void application_task ( void ) {
    left_speaker_gain  = -40;
    right_speaker_gain = -40;
    one_circle = 0;

    log_printf( &logger, " Turning volume up.\r\n" );
    while ( one_circle < 2 ) {
        if ( one_circle == 0 ) {
            if ( left_speaker_gain <= 10 || right_speaker_gain <= 10 ) {
                volume_set_vol_gain( &volume, left_speaker_gain, right_speaker_gain );
                left_speaker_gain += 0.5;
                right_speaker_gain += 0.5;
                Delay_ms ( 50 );
            } else {
                one_circle++;
                log_printf( &logger, " Turning volume down.\r\n" );
            }
        } else if ( left_speaker_gain >= -40 || right_speaker_gain >= -40 ) {
            volume_set_vol_gain( &volume, left_speaker_gain, right_speaker_gain );
            left_speaker_gain -= 0.5;
            right_speaker_gain -= 0.5;
            Delay_ms ( 50 );
        } else one_circle++;
    }
}

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.Volume

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.