LIN Hall 2 Click

LIN Hall 2 Click is a compact add-on board representing a linear Hall-effect sensing solution. This board features the TMAG5253, a low-power linear Hall-effect sensor from Texas Instruments. The sensor responds proportionally to the magnetic flux density with a magnetic sensitivity range of ±80mT and outputs proportional analog voltage.

Click Product page

Click library

• Author : Stefan Ilic
• Date : Oct 2023.
• Type : ADC type

Software Support

We provide a library for the LIN Hall 2 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 LIN Hall 2 Click driver.

Standard key functions :

• linhall2_cfg_setup Config Object Initialization function.

  void linhall2_cfg_setup ( linhall2_cfg_t *cfg );

• linhall2_init Initialization function.

  err_t linhall2_init ( linhall2_t *ctx, linhall2_cfg_t *cfg );

Example key functions :

• linhall2_read_an_pin_voltage LIN Hall 2 read AN pin voltage level function.

  err_t linhall2_read_an_pin_voltage ( linhall2_t *ctx, float *data_out );

• linhal2_set_en_pin LIN Hall 2 set EN pin state function.

  void linhal2_set_en_pin ( linhall2_t *ctx, uint8_t pin_state );

• linhal2_get_flux_density LIN Hall 2 read flux density function.

  err_t linhal2_get_flux_density ( linhall2_t *ctx, float *data_out );

Example Description

This is an example which demonstrates the use of LIN Hall 2 Click board by measuring magnetic field density and showing it in mT as well as detecting the orientation of the magnet.

The demo application is composed of two sections :

Application Init

The initialization of ADC module and log UART.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    linhall2_cfg_t linhall2_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.
    linhall2_cfg_setup( &linhall2_cfg );
    LINHALL2_MAP_MIKROBUS( linhall2_cfg, MIKROBUS_1 );
    if ( ADC_ERROR == linhall2_init( &linhall2, &linhall2_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    linhal2_set_en_pin( &linhall2, LINHALL2_ENABLE_DEVICE );

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

Application Task

The demo application reads the Magnetic field density and showing it in mT as well as the orientation of the magnet.

void application_task ( void ) 
{
    float mag_flux = 0;
    if ( LINHALL2_OK == linhal2_get_flux_density ( &linhall2, &mag_flux ) ) 
    {
        log_printf( &logger, " Magnetic flux density: %.3f[mT]\r\n", mag_flux );
        if ( 0 < mag_flux )
        {
            log_printf( &logger, " Magnetic field oriented South \r\n\n" );
        }
        else
        {
            log_printf( &logger, " Magnetic field oriented North \r\n\n" );
        }
        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.LINHall2

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.