Hall Current 12 Click

Hall Current 12 Click is a compact add-on board that provides economical and precise AC or DC current sensing solutions. This board features the TMCS1100, a galvanically isolated Hall-effect current sensor capable of DC or AC current measurement with high accuracy, excellent linearity, and temperature stability from Texas Instruments. It enables the lowest drift, <1% full-scale error, and highest accuracy over time and temperature. It also provides a reliable 600V lifetime working voltage and 3kVRMS isolation between the current path and circuitry with uni/bidirectional current sensing. Besides, the user is allowed to process the output signal in analog or digital form.

Click Product page

Click library

• Author : Nenad Filipovic
• Date : Jul 2021.
• Type : ADC/I2C type

Software Support

We provide a library for the HallCurrent12 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 HallCurrent12 Click driver.

Standard key functions :

• hallcurrent12_cfg_setup Config Object Initialization function.

  void hallcurrent12_cfg_setup ( hallcurrent12_cfg_t *cfg );

• hallcurrent12_init Initialization function.

  err_t hallcurrent12_init ( hallcurrent12_t *ctx, hallcurrent12_cfg_t *cfg );

Example key functions :

• hallcurrent12_calibration Hall Current 12 calibration function.

  err_t hallcurrent12_calibration ( hallcurrent12_t *ctx )

• hallcurrent12_get_adc Hall Current 12 get ADC function.

  err_t hallcurrent12_get_adc ( hallcurrent12_t *ctx, float *adc_vtg );

• hallcurrent12_get_current Hall Current 12 get current function.

  err_t hallcurrent12_get_current ( hallcurrent12_t *ctx, float *current );

Example Description

This library contains API for Hall Current 12 Click driver. The demo application reads ADC voltage ( V ) and current ( A ).

The demo application is composed of two sections :

Application Init

Initializes the driver and logger and calibrates the device offset.

void application_init ( void ) 
{
    log_cfg_t log_cfg;                      /**< Logger config object. */
    hallcurrent12_cfg_t hallcurrent12_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.
    hallcurrent12_cfg_setup( &hallcurrent12_cfg );
    HALLCURRENT12_MAP_MIKROBUS( hallcurrent12_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == hallcurrent12_init( &hallcurrent12, &hallcurrent12_cfg ) ) 
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );
        for ( ; ; );
    }

    log_info( &logger, " Calibrating device, remove input current in the next 5 seconds..." );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    if ( I2C_MASTER_ERROR == hallcurrent12_calibration ( &hallcurrent12 ) )
    {
        log_error( &logger, " Calibration Error. " );
        log_info( &logger, " Please, run program again... " );
        for ( ; ; );
    }
    log_info( &logger, " Calibration done!" );

    log_info( &logger, " Application Task " );
    log_printf( &logger, "--------------------------\r\n" );
    Delay_ms ( 100 );
}

Application Task

This is an example that demonstrates the use of the Hall Current 12 Click board™. In this example, we read and display the ADC voltage ( V ) and current ( A ) data. Results are being sent to the Usart Terminal where you can track their changes.

void application_task ( void ) 
{
    static float adc_voltage = 0;
    static float current = 0;
    if ( HALLCURRENT12_OK == hallcurrent12_get_adc( &hallcurrent12, &adc_voltage ) )
    {
        log_printf( &logger, " ADC voltage : %.3f V \r\n", adc_voltage );
    }
    if ( HALLCURRENT12_OK == hallcurrent12_get_current ( &hallcurrent12, &current ) )
    {
        log_printf( &logger, " Current     : %.3f A \r\n", current );
        log_printf( &logger, "--------------------------\r\n" );
    }
    Delay_ms ( 1000 );
}

Note

Switches: Sensitivity : Low ( GAIN = 1 ), Vout_Sel : AN ( Analog interface ), Vref_Sel : VCC/2 ( bidirectional measurement ).

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.HallCurrent12

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.