Hall Current 7 Click

Hall Current 7 Click is a compact add-on board that provides economical and precise solutions for AC or DC current sensing. This board features the ACS770, a thermally enhanced, fully integrated, Hall effect-based high precision linear current sensor with 100µΩ current conductor from Allegro MicroSystems. Applied current flows directly into the integrated conductor generating a magnetic field, and an integrated low-hysteresis core concentrates the magnetic field sensed by the Hall element with a typical accuracy of ±1% and 120 kHz bandwidth.

Click Product page

Click library

• Author : Stefan Ilic
• Date : Aug 2021.
• Type : I2C type

Software Support

We provide a library for the HallCurrent7 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 HallCurrent7 Click driver.

Standard key functions :

• hallcurrent7_cfg_setup Config Object Initialization function.

  void hallcurrent7_cfg_setup ( hallcurrent7_cfg_t *cfg );

• hallcurrent7_init Initialization function.

  err_t hallcurrent7_init ( hallcurrent7_t *ctx, hallcurrent7_cfg_t *cfg );

Example key functions :

• hallcurrent7_read_voltage Read voltage function.

  uint16_t hallcurrent7_read_voltage ( hallcurrent7_t *ctx, uint16_t v_ref );

• hallcurrent7_calc_current Calculate current function.

  int16_t hallcurrent7_calc_current ( hallcurrent7_t *ctx, uint16_t v_ref );

• hallcurrent7_avg_current Calculate Average current function.

  int16_t hallcurrent7_avg_current ( hallcurrent7_t *ctx, uint16_t v_ref );

Example Description

This example shows the capabilities of the Hall Current 7 Click board.

The demo application is composed of two sections :

Application Init

Initalizes I2C driver and makes an initial log.

void application_init ( void ) {
    log_cfg_t log_cfg;  /**< Logger config object. */
    hallcurrent7_cfg_t hallcurrent7_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.
    hallcurrent7_cfg_setup( &hallcurrent7_cfg );
    HALLCURRENT7_MAP_MIKROBUS( hallcurrent7_cfg, MIKROBUS_1 );
    err_t init_flag = hallcurrent7_init( &hallcurrent7, &hallcurrent7_cfg );
    if ( I2C_MASTER_ERROR == init_flag ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

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

Application Task

Measuring current passing through the on board Hall Effect Sensor and displaying data every two seconds.

void application_task ( void ) {
    current = hallcurrent7_avg_current( &hallcurrent7, HALLCURRENT7_VREF_5000_mV );
    log_printf( &logger, "Current: %d mA\r\n", current );

    log_printf( &logger, "------------------------\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

Note

In order to get correct calculations user should change "v_ref" value to his own power supply voltage.

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.HallCurrent7

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.