Library Description

The library performs the audio control of the Audio Amp 5 Click board. This library consists of the special commands for audio output control, for example to mute/turn on the outputs, to select the desired output gain or mode. For more details check documentation.

Key functions:

• void audioamp5_enable( uint8_t state ) - Function performs a shutdown or power up action, and on that way selects outputs to be muted or activated.
• void audioamp5_modeSelect( uint8_t state ) - Function puts a device to the desired mode.
• void audioamp5_gainSelect( uint8_t state ) - Function performs a desired gain selection.

Examples description

The application is composed of the three sections :

• System Initialization - Initializes peripherals and pins.
• Application Initialization - Initializes GPIO interface on the desired mikrobus selection and performs a device init configuration.
• Application Task - (code snippet) - Checks the entered command and, if the command is valid, performs a device configuration which the entered command determines. Note : After each command for device configuration, the command for configuration updating will be executed. When BD Mode (0) is selected, the VIN supply voltage threshold is 7.5V. When Low-Idle-Current 1SPW Mode is selected, the VIN supply voltage threshold is 3.4V.

void applicationTask()
{
    rxDat = UART_Rdy_Ptr();

    if (rxDat != UART_RX_NOT_READY)
    {
        rxDat = UART_Rd_Ptr();
        
        switch (rxDat)
        {
            case 'm' :
            {
                audioamp5_enable( _AUDIOAMP5_SHDWN_MUTE_OUTPUTS );
                mikrobus_logWrite( "** Outputs are muted **", _LOG_LINE );
            break;
            }
            case 'e' :
            {
                audioamp5_enable( _AUDIOAMP5_PWRUP_UNMUTE_OUTPUTS );
                mikrobus_logWrite( "** Outputs are enabled **", _LOG_LINE );
            break;
            }
            case '0' :
            {
                audioamp5_modeSelect( _AUDIOAMP5_BD_MODE );
                audioamp5_configUpdate();
                mikrobus_logWrite( "** BD Mode is selected **", _LOG_LINE );
            break;
            }
            case '1' :
            {
                audioamp5_modeSelect( _AUDIOAMP5_1SPW_MODE );
                audioamp5_configUpdate();
                mikrobus_logWrite( "** Low-Idle-Current 1SPW Mode is selected **", _LOG_LINE );
            break;
            }
            case '-' :
            {
                audioamp5_gainSelect( _AUDIOAMP5_GAIN_20DB );
                audioamp5_configUpdate();
                mikrobus_logWrite( "** Gain value is 20dB **", _LOG_LINE );
            break;
            }
            case '+' :
            {
                audioamp5_gainSelect( _AUDIOAMP5_GAIN_26DB );
                audioamp5_configUpdate();
                mikrobus_logWrite( "** Gain value is 26dB **", _LOG_LINE );
            break;
            }
            default :
            {
                writeLegend();
            break;
            }
        }
    }
}

Additional Functions :

All additional functions such as timer initialization and default handler.

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 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.