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Button 3 Click

Button 3 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.

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Click Library

• Author : Stefan Filipovic
• Date : Jun 2024.
• Type : I2C type

Software Support

Example Description

This example demonstrates the use of Button 3 Click board by toggling a button LED and its switch state on a button press.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Button3

Example Key Functions

• button3_cfg_setup Config Object Initialization function.

void button3_cfg_setup ( button3_cfg_t *cfg );

• button3_init Initialization function.

err_t button3_init ( button3_t *ctx, button3_cfg_t *cfg );

• button3_default_cfg Click Default Configuration function.

err_t button3_default_cfg ( button3_t *ctx );

• button3_toggle_red_led This function toggles the red button LED by toggling the RK pin logic state.

err_t button3_toggle_red_led ( button3_t *ctx );

• button3_toggle_green_led This function toggles the green button LED by toggling the GK pin logic state.

err_t button3_toggle_green_led ( button3_t *ctx );

• button3_toggle_blue_led This function toggles the blue button LED by toggling the BK pin logic state.

err_t button3_toggle_blue_led ( button3_t *ctx );

Application Init

Initializes the driver and performs the Click default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    button3_cfg_t button3_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.
    button3_cfg_setup( &button3_cfg );
    BUTTON3_MAP_MIKROBUS( button3_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == button3_init( &button3, &button3_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( BUTTON3_ERROR == button3_default_cfg ( &button3 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
    log_printf ( &logger, " Press button to change switch state\r\n\n" );
    log_printf ( &logger, " RED SWITCH OFF\r\n\n" );
    log_printf ( &logger, " GREEN SWITCH OFF\r\n\n" );
    log_printf ( &logger, " BLUE SWITCH OFF\r\n\n" );
}

Application Task

Toggles a button LED and its switch state on a button press and displays the state on the USB UART.

void application_task ( void )
{
    static uint8_t red_switch_state = BUTTON3_SWITCH_OFF;
    static uint8_t green_switch_state = BUTTON3_SWITCH_OFF;
    static uint8_t blue_switch_state = BUTTON3_SWITCH_OFF;
    uint8_t switch_state = BUTTON3_SWITCH_OFF;

    if ( BUTTON3_PIN_STATE_LOW == button3_get_int_pin ( &button3 ) )
    {
        if ( ( BUTTON3_OK == button3_get_red_button ( &button3, &switch_state ) ) && 
             ( BUTTON3_BUTTON_PRESSED == switch_state ) )
        {
            button3_toggle_red_led ( &button3 );
            red_switch_state ^= BUTTON3_SWITCH_ON;
            if ( BUTTON3_SWITCH_ON == red_switch_state )
            {
                log_printf ( &logger, " RED SWITCH ON\r\n\n" );
            }
            else
            {
                log_printf ( &logger, " RED SWITCH OFF\r\n\n" );
            }
        }
        if ( ( BUTTON3_OK == button3_get_green_button ( &button3, &switch_state ) ) && 
             ( BUTTON3_BUTTON_PRESSED == switch_state ) )
        {
            button3_toggle_green_led ( &button3 );
            green_switch_state ^= BUTTON3_SWITCH_ON;
            if ( BUTTON3_SWITCH_ON == green_switch_state )
            {
                log_printf ( &logger, " GREEN SWITCH ON\r\n\n" );
            }
            else
            {
                log_printf ( &logger, " GREEN SWITCH OFF\r\n\n" );
            }
        }
        if ( ( BUTTON3_OK == button3_get_blue_button ( &button3, &switch_state ) ) && 
             ( BUTTON3_BUTTON_PRESSED == switch_state ) )
        {
            button3_toggle_blue_led ( &button3 );
            blue_switch_state ^= BUTTON3_SWITCH_ON;
            if ( BUTTON3_SWITCH_ON == blue_switch_state )
            {
                log_printf ( &logger, " BLUE SWITCH ON\r\n\n" );
            }
            else
            {
                log_printf ( &logger, " BLUE SWITCH OFF\r\n\n" );
            }
        }
        Delay_ms ( 100 );
    }
}

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.

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