btaudio

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BT Audio Click

BT Audio 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 : Jun 2020.
• Type : UART type

Software Support

Example Description

This example reads and processes data from BT Audio Clicks.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.BtAudio

Example Key Functions

• btaudio_cfg_setup Config Object Initialization function.

void btaudio_cfg_setup ( btaudio_cfg_t *cfg );

• btaudio_init Initialization function.

err_t btaudio_init ( btaudio_t *ctx, btaudio_cfg_t *cfg );

• btaudio_next_track Play next track function.

uint8_t btaudio_next_track( btaudio_t *ctx );

• btaudio_increase_volume Increase volume function.

uint8_t btaudio_increase_volume( btaudio_t *ctx );

• btaudio_decrease_volume Decrease volume function.

uint8_t btaudio_decrease_volume( btaudio_t *ctx );

Application Init

Initializes the driver and configures the Click board.

void application_init ( void )
{
    log_cfg_t log_cfg;
    btaudio_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.

    btaudio_cfg_setup( &cfg );
    BTAUDIO_MAP_MIKROBUS( cfg, MIKROBUS_POSITION_BTAUDIO );
    btaudio_init( &btaudio, &cfg );
    Delay_ms ( 1000 );
    
    log_printf( &logger, "Power ON\r\n" );
    btaudio_set_power_on( &btaudio );
    btaudio_process( RESPONSE_NULL );
    
    log_printf( &logger, "Factory reset\r\n" );
    btaudio_set_factory_defaults( &btaudio );
    btaudio_process( RESPONSE_NULL );
    
    log_printf( &logger, "Set device name\r\n" );
    btaudio_set_device_name( &btaudio, "BT Audio Click" );
    btaudio_reset( &btaudio );
    btaudio_process( RESPONSE_AOK );
    
    log_printf( &logger, "Set data mode\r\n" );
    btaudio_set_cmd_mode( &btaudio, 1 );
    btaudio_process( RESPONSE_NULL );
}

Application Task

Checks if there's any command received, then parses it and performs adequate actions.

void application_task ( void )
{
    btaudio_process( RESPONSE_NULL );
}

Note

We have used the Serial Bluetooth Terminal smartphone application for the test. A smartphone and the Click board must be paired in order to exchange messages with each other. So make sure to pair your device with the Click board and connect to it using the Serial Bluetooth Terminal application, then you will be able to send commands listed below.

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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