3D Hall 8 Click

3D Hall 8 Click is a compact add-on board containing an ultra-small 3D-magnetic sensor for industrial and consumer applications.

Click Product page

Click library

• Author : Luka Filipovic
• Date : Jan 2021.
• Type : I2C type

Software Support

We provide a library for the 3DHall8 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 3DHall8 Click driver.

Standard key functions :

• c3dhall8_cfg_setup Config Object Initialization function.

  void c3dhall8_cfg_setup ( c3dhall8_cfg_t *cfg );

• c3dhall8_init Initialization function.

  C3DHALL8_RETVAL c3dhall8_init ( c3dhall8_t *ctx, c3dhall8_cfg_t *cfg );

• c3dhall8_default_cfg Click Default Configuration function.

  void c3dhall8_default_cfg ( c3dhall8_t *ctx );

Example key functions :

• c3dhall8_generic_write 3D Hall 8 I2C writing function.

  err_t c3dhall8_generic_write ( c3dhall8_t *ctx, uint8_t reg, uint8_t tx_buf )

• c3dhall8_read_sensor_data Reading sensor data function.

  void c3dhall8_read_sensor_data ( c3dhall8_t *ctx, c3dhall8_data_t *sensor_data );

• c3dhall8_get_xyz_magnetic_matching Calculating magnetic matching.

  float c3dhall8_get_xyz_magnetic_matching ( c3dhall8_t *ctx, c3dhall8_data_t sensor_data );

Example Description

This application shows capability of 3D Hall 8 Click board. It configures device and reads sensor data. Sensor is capeable of reading magnetic flux density from 3 axes and temperature.

The demo application is composed of two sections :

Application Init

Initialization of device communication and application log and configures device.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    c3dhall8_cfg_t c3dhall8_cfg;  /**< Click config object. */
    uint8_t rx_data;

    /** 
     * 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.

    c3dhall8_cfg_setup( &c3dhall8_cfg );
    C3DHALL8_MAP_MIKROBUS( c3dhall8_cfg, MIKROBUS_1 );
    err_t init_flag = c3dhall8_init( &c3dhall8, &c3dhall8_cfg );
    if ( init_flag == I2C_MASTER_ERROR ) 
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    log_printf( &logger," > Setting configuration...\r\n" );
    c3dhall8_default_cfg ( &c3dhall8 ); 

    log_info( &logger, " Application Task " );
    log_printf( &logger, "**************************************\r\n" );
    Delay_ms ( 1000 );
}

Application Task

Reads data from the device and logs it in span of 500ms.

void application_task ( void ) 
{
    c3dhall8_data_t sens_data;
    c3dhall8_read_sensor_data( &c3dhall8, &sens_data );

    log_printf( &logger, "> X[mT]: %.2f\r\n> Y[mT]: %.2f\r\n> Z[mT]: %.2f \r\n> Temperature[C]: %.2f\r\n", 
                sens_data.x_axis, sens_data.y_axis, sens_data.z_axis, sens_data.temperature );
    float magnetic_match = c3dhall8_get_xyz_magnetic_matching( &c3dhall8, sens_data );
    log_printf( &logger, "> XYZ magnetic matching: %.2f\r\n", magnetic_match );
    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.3DHall8

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.