Smart Buck click

Smart Buck click is the two-channel step-down DC/DC converter and regulator, with plenty of additional functions. It can provide voltage measurement at each of its two programmable voltage outputs, as well as the measurement of the current consumption.

click Product page

Click library

• Author : MikroE Team
• Date : Dec 2019.
• Type : I2C type

Software Support

We provide a library for the Smart Buck 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for Smart Buck Click driver.

Standard key functions :

• Config Object Initialization function.

  void smartbuck_cfg_setup ( smartbuck_cfg_t *cfg );

• Initialization function.

  SMARTBUCK_RETVAL smartbuck_init ( smartbuck_t ctx, smartbuck_cfg_t cfg );

• Click Default Configuration function.

  void smartbuck_default_cfg ( smartbuck_t *ctx );

Example key functions :

• Function performs the desired command for PAC1934.

  uint8_t smartbuck_send_cmd_PAC ( smartbuck_t *ctx, uint8_t command );

• Function reads and calculates the voltage, current and power data from PAC1934 activated channels.

  void smartbuck_get_data( smartbuck_t ctx, float voltage, float current, float power );

• Function reads the desired number of bytes from the PAC1934 registers.

  uint8_t smartbuck_block_read_PAC( smartbuck_t ctx, uint8_t reg_addr, uint8_t data_out, uint8_t n_bytes );

Examples Description

This application reads voltage, current, and power from all available channels.

The demo application is composed of two sections :

Application Init

Initializes I2C interface and logger and peforms the click default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;
    smartbuck_cfg_t cfg;

    /** 
     * 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.

    smartbuck_cfg_setup( &cfg );
    SMARTBUCK_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    smartbuck_init( &smartbuck, &cfg );
    smartbuck_default_cfg( &smartbuck );
}   

Application Task

Sends command for updating data registers with new converted data, then waits 500ms and after that reads new data from data registers. In this way we can get voltage, current and power data from activated channels. Results are being logged on USB UART.

void application_task ( void )
{
    smartbuck_send_cmd_pac( &smartbuck, SMARTBUCK_REFRESH_V_CMND );
    Delay_ms ( 500 );
    smartbuck_get_data( &smartbuck, &voltage_res[ 0 ], &current_res[ 0 ], &power_res[ 0 ] );

    check_byte = 0x80;
    idx = 0;

    for ( cnt = 0; cnt < 4; cnt++ )
    {
        if ( ( smartbuck.enabled_chann & check_byte ) == 0 )
        {
            channel_log();

            log_printf( &logger, "U: %.2f V    ", voltage_res[ idx ] );
            log_printf( &logger, "I: %.2f mA    ", current_res[ idx ] );
            log_printf( &logger, "P: %.2f mW    ", power_res[ idx ] );

            idx++;
        }
        check_byte >>= 1;
    }

    log_printf( &logger, "\n");
}

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub account.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.SMARTBUCK

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.