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mikroSDK Library

BT Audio click

Rating:

0

Author: MIKROE

Last Updated: 2019-08-01

Package Version: 1.0.0.1

mikroSDK Library: 1.0.0.0

Category: BT/BLE

Downloaded: 4231 times

Not followed.

License: MIT license  

If you are getting tired of all those cables you need just to listen to your favorite song over speakers, what you need is BT Audio click with Microchip’s RN52 Bluetooth audio module. With onboard 3.5mm jacks for both a microphone and a speaker, this is a complete solution for streaming audio from a smartphone or PC over a wireless connection.

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  • mikroSDK Library 2.0.0.0
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mikroSDK Library Blog

BT Audio click

BT Audio click

Front and back view of the BT Audio click board.

View full image

Library Description

The library covers all the necessary functions to control BT Audio Click board.

Key functions:

  • void btaudio_uartWrite( uint8_t *txData ) - UART write data function.
  • BTAUDIO_STATUS_T btaudio_increaseVolume() - Increase volume function.
  • BTAUDIO_STATUS_T btaudio_nextTrack() - Play next track function.

Examples description

The application is composed of the three sections :

  • System Initialization - Initializes UART and LOG structures sets INT pin as input and RST, CS and PWM pins as output enable interrupts routine and start to write log.
  • Application Initialization - Initialization driver enables - UART, sets Power On, set command mode, set data mode, factory reset, also write log.
  • Application Task - This is an example which demonstrates the use of BT Audio click board. Waits for valid user input and executes functions based on a set of valid commands. Results are being sent to the Usart Terminal where you can track their changes.
  • Commands :
    '+' - volume up
    '-' - volume down
    '>' - next track
    '<' - previous track
    '*' - play/pause track  
void applicationTask()
{
    char receivedData;
    
    if ( UART_Rdy_Ptr() )
    {
        receivedData = UART_Rd_Ptr();

        switch ( receivedData )
        {
            case '+' :
            {
                btaudio_increaseVolume();
                mikrobus_logWrite( "    - Volume Up -", _LOG_LINE );
                break;
            }
            case '-' :
            {
                btaudio_decreaseVolume();
                mikrobus_logWrite( "   - Volume Down -", _LOG_LINE );
                break;
            }
            case '>' :
            {
                btaudio_nextTrack();
                mikrobus_logWrite( "--------------------", _LOG_LINE );
                mikrobus_logWrite( "     Next Track     ", _LOG_LINE );
                mikrobus_logWrite( "--------------------", _LOG_LINE );
                break;
            }
            case '<' :
            {
                btaudio_previousTrack();
                mikrobus_logWrite( "--------------------", _LOG_LINE );
                mikrobus_logWrite( "   Previous Track   ", _LOG_LINE );
                mikrobus_logWrite( "--------------------", _LOG_LINE );
                break;
            }
            case '*' :
            {
                btaudio_pausePlayTrack();
                mikrobus_logWrite( "--------------------", _LOG_LINE );
                mikrobus_logWrite( "  Play/Pause Track  ", _LOG_LINE );
                mikrobus_logWrite( "--------------------", _LOG_LINE );
                break;
            }
        }
    }
}

Other mikroE Libraries used in the example:

  • UART

Additional notes and informations

Depending on the development board you are using, you may need USB UART clickUSB 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.

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