Current 4 Click

Current 4 Click is a compact add-on board that provides a precise and accurate current sensing solution. This board features the INA250, a bidirectional, zero-drift current-shunt monitor from Texas Instruments.

Click Product page

Click library

• Author : Luka Filipovic
• Date : Jun 2021.
• Type : ADC type

Software Support

We provide a library for the Current4 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 Current4 Click driver.

Standard key functions :

• current4_cfg_setup Config Object Initialization function.

  void current4_cfg_setup ( current4_cfg_t *cfg );

• current4_init Initialization function.

  err_t current4_init ( current4_t *ctx, current4_cfg_t *cfg );

Example key functions :

• current4_read_load_current Read load current.

  err_t current4_read_load_current ( current4_t *ctx, float *load_current );

• current4_read_an_pin_voltage Read AN pin voltage level function.

  err_t current4_read_an_pin_voltage ( current4_t *ctx, float *data_out );

• current4_read_an_pin_value Read AN pin value function.

  err_t current4_read_an_pin_value ( current4_t *ctx, uint16_t *data_out );

Example Description

This example showcases the ability of the Current 4 Click board. It configures Host MCU for communication and reads the voltage of AN pin and calculates current on load output.

The demo application is composed of two sections :

Application Init

Initialization of the communication modules(ADC and UART).

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    current4_cfg_t current4_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.
    current4_cfg_setup( &current4_cfg );
    CURRENT4_MAP_MIKROBUS( current4_cfg, MIKROBUS_1 );
    if ( ADC_ERROR == current4_init( &current4, &current4_cfg ) )
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

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

Application Task

In span on 500ms reads voltage and calculates the current on load.

void application_task ( void ) 
{
    float current4_load_current = 0;

    if ( ADC_ERROR != current4_read_load_current ( &current4, &current4_load_current ) ) 
    {
        log_printf( &logger, " > Load current : %.2f[A]\r\n", current4_load_current );
        log_printf( &logger, "**********************\r\n" );
    }

    Delay_ms ( 500 );
}

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.Current4

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.