MIC 3 Click

The MIC 3 Click is a Click board™ that features the SSM2167-1RMZ-R7, a Microphone Preamplifier, from Analog Device. This Click board™ is a low voltage Microphone preamplifier with Variable compression and noise gating.

Click Product page

Click library

• Author : Stefan Ilic
• Date : Sep 2021.
• Type : GPIO type

Software Support

We provide a library for the MIC3 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 from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for MIC3 Click driver.

Standard key functions :

• mic3_cfg_setup Config Object Initialization function.

  void mic3_cfg_setup ( mic3_cfg_t *cfg );

• mic3_init Initialization function.

  err_t mic3_init ( mic3_t *ctx, mic3_cfg_t *cfg );

• mic3_default_cfg Click Default Configuration function.

  err_t mic3_default_cfg ( mic3_t *ctx );

Example key functions :

• mic3_shd_pin_set MIC 3 SHD pin setting function.

  void mic3_shd_pin_set ( mic3_t *ctx, uint8_t state ); 

Example Description

This is an example that demonstrates the use of the MIC 3 Click board.

The demo application is composed of two sections :

Application Init

Initialization of SHD to output and log module, maping GPIO for Mikrobus1, and seting SHD pin to HIGH state.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    mic3_cfg_t mic3_cfg;  /**< Click config object. */

    /** 
     * 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.
    mic3_cfg_setup( &mic3_cfg );
    MIC3_MAP_MIKROBUS( mic3_cfg, MIKROBUS_1 );
    if ( DIGITAL_OUT_UNSUPPORTED_PIN == mic3_init( &mic3, &mic3_cfg ) ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }
    mic3_default_cfg ( &mic3 );
    log_info( &logger, " Application Task " );
}

Application Task

Turning microphone on for the 5 seconds, then turning it off for 5 seconds.

void application_task ( void ) 
{
    log_printf( &logger, " - Microphone is turned on  - \r\n" );
    mic3_shd_pin_set( &mic3, MIC3_PIN_STATE_HIGH );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf( &logger, " - Microphone is turned off  - \r\n" );
    mic3_shd_pin_set( &mic3, MIC3_PIN_STATE_LOW );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.MIC3

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. UART terminal is available in all MikroElektronika compilers.