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mikroSDK Library

AudioAmp 6 click

Rating:

5

Author: MikroElektronika Team

Last Updated: 2019-02-13

Category: Audio & Speech

Downloaded: 148 times

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Audio Amp 6 click is a mono/subwoofer audio amplifier, capable of delivering up to 18.5W per channel with the 4Ω load. It is based on the TPA3138D2, a class-D integrated amplifier, which utilizes a highly efficient switching scheme.

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mikroSDK Library Blog

AudioAmp 6 click

AudioAmp 6 click

Native view of the AudioAmp 6 click board.

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AudioAmp 6 click

AudioAmp 6 click

Front and back view of the AudioAmp 6 click board.

View full image

Library Description

Library contains all the necessary functions for control to the AudioAmp 6 click.

Key functions:

  • void audioamp6_setMode(uint8_t mode) - Sets MODE BD or 1SPW.
  • void audioamp6_setOutput(uint8_t out) - Enable or Disable output.
  • void audioamp6_setGain(uint8_t gain) - Sets Gain 20dB or 26dB.

Examples description

The application is composed of the three sections :

  • System Initialization - Sets the necessary gpio pins to control the click.
  • Application Initialization - Initializes the driver init and sets initial settings for the chip.
  • Application Task - Waits for valid user input and executes functions based on set of valid commands.

Note: Sets the input voltage from 3.5V to 14.4V. Use the UART to control the amplification or reduction of sound.

Commands : 'e' - Enable/disable output 'g' - Changes the gain settings (20dB - 26dB)

void applicationTask()
{
    uint8_t dataReady_;
    char receivedData_;

    dataReady_ = UART_Rdy_Ptr();

    if (dataReady_ != 0)
    {
        receivedData_ = UART_Rd_Ptr();

        switch (receivedData_)
        {
            case 'e' :
            {
                /* Device enable or disable */
                if(fEnable == _AUDIOAMP6_OUTPUT_ENABLE)
                {
                    audioamp6_setOutput(_AUDIOAMP6_OUTPUT_DISABLE);
                    mikrobus_logWrite("---- OUTPUT DISABLED ----", _LOG_LINE);
                    fEnable = _AUDIOAMP6_OUTPUT_DISABLE;
                }
                else
                {
                    audioamp6_setOutput(_AUDIOAMP6_OUTPUT_ENABLE);
                    mikrobus_logWrite("---- OUTPUT ENABLED ----", _LOG_LINE);
                    fEnable = _AUDIOAMP6_OUTPUT_ENABLE;
                }
                break;
            }
            case 'g' :
            {
                /* Gain 20dB or 26dB*/
                if(fGain == _AUDIOAMP6_GAIN_26dB)
                {
                    audioamp6_setGain(_AUDIOAMP6_GAIN_20dB);
                    mikrobus_logWrite("---- Gain [20 dB] ----", _LOG_LINE);
                    fGain = _AUDIOAMP6_GAIN_20dB;
                }
                else
                {
                    audioamp6_setGain(_AUDIOAMP6_GAIN_26dB);
                    mikrobus_logWrite("---- Gain [26 dB] ----", _LOG_LINE);
                    fGain = _AUDIOAMP6_GAIN_26dB;
                }
                break;
            }
        }
    }
}

Other mikroE Libraries used in the example:

  • GPIO
  • 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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