MIC 2 Click

MIC 2 Click is equipped with a small electret microphone, accompanied by a suitable pre-amplifying circuit. The small electret microphone is not capable of providing sufficient line-level output; therefore, the pre-amp has to be used

Click Product page

Click library

• Author : MikroE Team
• Date : Jan 2020.
• Type : ADC type

Software Support

We provide a library for the Mic2 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 Mic2 Click driver.

Standard key functions :

• mic2_cfg_setup Config Object Initialization function.

  void mic2_cfg_setup ( mic2_cfg_t *cfg ); 

• mic2_init Initialization function.

  err_t mic2_init ( mic2_t *ctx, mic2_cfg_t *cfg );

Example key functions :

• mic2_set_potentiometer This function set the value of digital potentiometer.

  void mic2_set_potentiometer ( mic2_t *ctx, uint8_t ptt_value );

• mic2_read_an_pin_value This function reads results of AD conversion of the AN pin.

  err_t mic2_read_an_pin_value ( mic2_t *ctx, uint16_t *data_out );

• mic2_read_an_pin_voltage This function reads results of AD conversion of the AN pin and converts them to proportional voltage level.

  err_t mic2_read_an_pin_voltage ( mic2_t *ctx, float *data_out );

Example Description

This range is suited for audio and/or speech applications.

The demo application is composed of two sections :

Application Init

Initializes the driver and logger and sets the digital potentiometer.

void application_init ( void )
{
    log_cfg_t log_cfg;
    mic2_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.
    mic2_cfg_setup( &cfg );
    MIC2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    mic2_init( &mic2, &cfg );

    mic2_set_potentiometer( &mic2, 35 );
    log_info( &logger, " Application Task " );
}

Application Task

Reads the AN pin voltage and displays the results on the USB UART every 100ms.

void application_task ( void )
{
    float voltage = 0;
    if ( MIC2_OK == mic2_read_an_pin_voltage ( &mic2, &voltage ) ) 
    {
        log_printf( &logger, " AN Voltage : %.3f[V]\r\n\n", voltage );
        Delay_ms ( 100 );
    }
} 

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.Mic2

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.