stepdown3

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Step Down 3 Click

Step Down 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 : Apr 2022.
• Type : GPIO type

Software Support

Example Description

This example demonstrates the use of Step Down 3 Click board by iterating through the entire output voltage range.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.StepDown3

Example Key Functions

• stepdown3_cfg_setup Config Object Initialization function.

void stepdown3_cfg_setup ( stepdown3_cfg_t *cfg );

• stepdown3_init Initialization function.

err_t stepdown3_init ( stepdown3_t *ctx, stepdown3_cfg_t *cfg );

• stepdown3_enable_device This function enables the auxiliary output (VOUT_AUX) by setting the AUX pin to HIGH logic state.

void stepdown3_enable_device ( stepdown3_t *ctx );

• stepdown3_enable_aux_output This function disables the auxiliary output (VOUT_AUX) by setting the AUX pin to LOW logic state.

void stepdown3_enable_aux_output ( stepdown3_t *ctx );

• stepdown3_set_output_voltage This function sets the output voltage by setting the D2, D1, and D0 pins to a desired state.

void stepdown3_set_output_voltage ( stepdown3_t *ctx, uint8_t vout );

Application Init

Initializes the driver and logger, then enables the Click board and disables the auxiliary output.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    stepdown3_cfg_t stepdown3_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.
    stepdown3_cfg_setup( &stepdown3_cfg );
    STEPDOWN3_MAP_MIKROBUS( stepdown3_cfg, MIKROBUS_1 );
    if ( DIGITAL_OUT_UNSUPPORTED_PIN == stepdown3_init( &stepdown3, &stepdown3_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    stepdown3_enable_device ( &stepdown3 );
    stepdown3_disable_aux_output ( &stepdown3 );
    
    log_info( &logger, " Application Task " );
}

Application Task

Changes the output voltage every 3 seconds and displays the set voltage output value on the USB UART.

void application_task ( void )
{
    static uint8_t vout = STEPDOWN3_OUT_VOLTAGE_1V6;
    stepdown3_set_output_voltage ( &stepdown3, vout );
    switch ( vout )
    {
        case STEPDOWN3_OUT_VOLTAGE_1V6:
        {
            log_printf( &logger, " Output voltage: 1.6 V\r\n\n" );
            break;
        }
        case STEPDOWN3_OUT_VOLTAGE_1V8:
        {
            log_printf( &logger, " Output voltage: 1.8 V\r\n\n" );
            break;
        }
        case STEPDOWN3_OUT_VOLTAGE_2V1:
        {
            log_printf( &logger, " Output voltage: 2.1 V\r\n\n" );
            break;
        }
        case STEPDOWN3_OUT_VOLTAGE_2V5:
        {
            log_printf( &logger, " Output voltage: 2.5 V\r\n\n" );
            break;
        }
        case STEPDOWN3_OUT_VOLTAGE_2V7:
        {
            log_printf( &logger, " Output voltage: 2.7 V\r\n\n" );
            break;
        }
        case STEPDOWN3_OUT_VOLTAGE_2V8:
        {
            log_printf( &logger, " Output voltage: 2.8 V\r\n\n" );
            break;
        }
        case STEPDOWN3_OUT_VOLTAGE_3V0:
        {
            log_printf( &logger, " Output voltage: 3.0 V\r\n\n" );
            break;
        }
        case STEPDOWN3_OUT_VOLTAGE_3V3:
        {
            log_printf( &logger, " Output voltage: 3.3 V\r\n\n" );
            break;
        }
    }
    if ( ++vout > STEPDOWN3_OUT_VOLTAGE_3V3 )
    {
        vout = STEPDOWN3_OUT_VOLTAGE_1V6;
    }
    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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