btaudio  2.0.0.0
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BT Audio click

If you are getting tired of all those cables you need just to listen to your favorite song over speakers.

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Click library

  • Author : MikroE Team
  • Date : Jun 2020.
  • Type : UART type

Software Support

We provide a library for the BtAudio 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 BtAudio Click driver.

Standard key functions :

  • Config Object Initialization function.

    void btaudio_cfg_setup ( btaudio_cfg_t *cfg );

  • Initialization function.

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

Example key functions :

  • Play next track function

    uint8_t btaudio_next_track ( btaudio_t *ctx );

  • Increase volume function

    uint8_t btaudio_increase_volume ( btaudio_t *ctx );

  • Decrease volume function

    uint8_t btaudio_decrease_volume ( btaudio_t *ctx );

Examples Description

This example reads and processes data from BT Audio clicks.

The demo application is composed of two sections :

Application Init

Initializes the driver and configures the click board.

void application_init ( void )
{
log_cfg_t log_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, "---- Application Init ----" );
// Click initialization.
BTAUDIO_MAP_MIKROBUS( cfg, MIKROBUS_1 );
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_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.

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.BtAudio

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.


RESPONSE_AOK
#define RESPONSE_AOK
Definition: main.c:40
BTAUDIO_MAP_MIKROBUS
#define BTAUDIO_MAP_MIKROBUS(cfg, mikrobus)
Definition: btaudio.h:52
application_task
void application_task(void)
Definition: main.c:228
btaudio_init
BTAUDIO_RETVAL btaudio_init(btaudio_t *ctx, btaudio_cfg_t *cfg)
Initialization function.
btaudio_cfg_setup
void btaudio_cfg_setup(btaudio_cfg_t *cfg)
Config Object Initialization function.
btaudio_set_device_name
uint8_t btaudio_set_device_name(btaudio_t *ctx, uint8_t *name)
Set device name function.
btaudio_reset
void btaudio_reset(btaudio_t *ctx)
Reset function.
RESPONSE_NULL
#define RESPONSE_NULL
Definition: main.c:42
application_init
void application_init(void)
Definition: main.c:185
btaudio_set_power_on
void btaudio_set_power_on(btaudio_t *ctx)
Power On function.
btaudio_set_factory_defaults
void btaudio_set_factory_defaults(btaudio_t *ctx)
Set factory defaults settings function.
btaudio_set_cmd_mode
void btaudio_set_cmd_mode(btaudio_t *ctx, uint8_t mode)
Set command mode function.
btaudio_cfg_t
Click configuration structure definition.
Definition: btaudio.h:119