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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.
- Author : Stefan Nikolic
- Date : nov 2020.
- Type : SPI type
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.
This library contains API for Volume Click driver.
- 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 );
- 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 );
This example sets up the device and performs volume turn up and down.
The demo application is composed of two sections :
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 " );
}
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.