button4

---

Button 4 Click

Button 4 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

---

Click Library

• Author : Stefan Filipovic
• Date : Mar 2025.
• Type : GPIO type

Software Support

Example Description

This example demonstrates the use of the Button 4 Click board by initializing the device and detecting the button state changes. It logs whether the button is pressed (active) or released (reset).

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Button4

Example Key Functions

• button4_cfg_setup This function initializes Click configuration structure to initial values.

  void button4_cfg_setup ( button4_cfg_t *cfg );

• button4_init This function initializes all necessary pins and peripherals used for this Click board.

  err_t button4_init ( button4_t *ctx, button4_cfg_t *cfg );

• button4_get_out_pin This function returns the OUT pin logic state.

  uint8_t button4_get_out_pin ( button4_t *ctx );

Application Init

Initializes the logger and the Button 4 Click driver.

void application_init ( void )
{
    log_cfg_t log_cfg;  
    button4_cfg_t button4_cfg;  

    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );
 
    // Click initialization.
    button4_cfg_setup( &button4_cfg );
    BUTTON4_MAP_MIKROBUS( button4_cfg, MIKROBUS_POSITION_BUTTON4 );
    if ( DIGITAL_OUT_UNSUPPORTED_PIN == button4_init( &button4, &button4_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

Monitors the button state and logs whether the button is active (pressed) or reset (released) when a state change is detected.

void application_task ( void )
{
    static uint8_t button_state_old = BUTTON4_BUTTON_RESET;
    uint8_t button_state = button4_get_out_pin ( &button4 );
    if ( button_state_old != button_state )
    {
        button_state_old = button_state;
        if ( BUTTON4_BUTTON_ACTIVE == button_state )
        {
            log_printf ( &logger, " BUTTON ACTIVE\r\n\n" );
        }
        else
        {
            log_printf ( &logger, " BUTTON RESET\r\n\n" );
        }
    }
}

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

---