vref

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VREF Click

VREF 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 : Mar 2025.
• Type : GPIO type

Software Support

Example Description

This example demonstrates the use of the VREF Click board by enabling and disabling its 2.5V reference output periodically. The application toggles the output every 3 seconds and logs the current state via UART.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.VREF

Example Key Functions

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

void vref_cfg_setup ( vref_cfg_t *cfg );

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

err_t vref_init ( vref_t *ctx, vref_cfg_t *cfg );

• vref_enable_output This function enables VREF output by setting the EN pin to high logic state.

void vref_enable_output ( vref_t *ctx );

• vref_disable_output This function disables VREF output by setting the EN pin to low logic state.

void vref_disable_output ( vref_t *ctx );

Application Init

Initializes the logger and configures the VREF Click driver.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    vref_cfg_t vref_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.
    vref_cfg_setup( &vref_cfg );
    VREF_MAP_MIKROBUS( vref_cfg, MIKROBUS_POSITION_VREF );
    if ( DIGITAL_OUT_UNSUPPORTED_PIN == vref_init( &vref, &vref_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

Alternately enables and disables the voltage reference output with a 3-second delay, displaying the output state on the UART terminal.

void application_task ( void )
{
    log_printf( &logger, " VREF Output: Enabled\r\n" );
    vref_enable_output ( &vref );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf( &logger, " VREF Output: Disabled\r\n\n" );
    vref_disable_output ( &vref );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

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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