Step Down 9 Click

Step Down 9 Click is a compact add-on board that converts higher voltages into a lower voltage level. This board features the MAX20406, an automotive fully integrated synchronous silent switcher buck converter from Analog Devices.

Click Product page

Click library

• Author : Stefan Ilic
• Date : Aug 2023.
• Type : SPI type

Software Support

We provide a library for the Step Down 9 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 Step Down 9 Click driver.

Standard key functions :

• stepdown9_cfg_setup Config Object Initialization function.

  void stepdown9_cfg_setup ( stepdown9_cfg_t *cfg );

• stepdown9_init Initialization function.

  err_t stepdown9_init ( stepdown9_t *ctx, stepdown9_cfg_t *cfg );

• stepdown9_default_cfg Click Default Configuration function.

  err_t stepdown9_default_cfg ( stepdown9_t *ctx );

Example key functions :

• stepdown9_set_en_pin Step Down 9 set EN pin state function.

  void stepdown9_set_en_pin ( stepdown9_t *ctx, uint8_t pin_state );

• stepdown9_set_wiper_pos Step Down 9 set wiper position.

  err_t stepdown9_set_wiper_pos ( stepdown9_t *ctx, uint8_t wiper_pos );

• stepdown9_set_output Step Down 9 set output voltage.

  err_t stepdown9_set_output ( stepdown9_t *ctx, uint8_t voltage );

Example Description

This library contains API for the Step Down 9 Click driver. This driver provides the functions to set the output voltage treshold.

The demo application is composed of two sections :

Application Init

Initialization of I2C module and log UART. After driver initialization, default settings sets output voltage to 1.6 V.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    stepdown9_cfg_t stepdown9_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.
    stepdown9_cfg_setup( &stepdown9_cfg );
    STEPDOWN9_MAP_MIKROBUS( stepdown9_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == stepdown9_init( &stepdown9, &stepdown9_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( STEPDOWN9_ERROR == stepdown9_default_cfg ( &stepdown9 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
}

Application Task

This example demonstrates the use of the Step Down 9 Click board™ by changing output voltage every 5 seconds starting from 1.6 V up to 10 V.

void application_task ( void )
{
    for ( uint8_t n_cnt = STEPDOWN9_VOUT_1V6; n_cnt <= STEPDOWN9_VOUT_10V; n_cnt++ )
    {
        stepdown9_set_output( &stepdown9, n_cnt );
        log_printf( &logger, " Selected output is:" );
        print_selected_output_level ( n_cnt );
        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.StepDown9

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.