Magnetic Rotary 4 Click

Magnetic Rotary 4 Click is a compact add-on board for accurate magnet-position sensing. This board features the AS5047D, an SPI-configurable high-resolution rotary position sensor for fast absolute angle measurement over a full 360-degree range from ams AG. The AS5047D is equipped with revolutionary integrated dynamic angle error compensation (DAEC™) with almost 0 latency and offers a robust design that suppresses the influence of any homogenous external stray magnetic field. It also comes with an onboard header reserved for incremental and commutation signals of their respective A/B/I and U/V/W signals alongside embedded self-diagnostics, including magnetic field strength, lost magnet, and other related diagnostic features.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Jun 2022.
• Type : SPI type

Software Support

We provide a library for the Magnetic Rotary 4 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 Magnetic Rotary 4 Click driver.

Standard key functions :

• magneticrotary4_cfg_setup Config Object Initialization function.

  void magneticrotary4_cfg_setup ( magneticrotary4_cfg_t *cfg );

• magneticrotary4_init Initialization function.

  err_t magneticrotary4_init ( magneticrotary4_t *ctx, magneticrotary4_cfg_t *cfg );

Example key functions :

• magneticrotary4_set_rotation_direction This function sets the magnet rotation direction to clockwise or counter-clockwise.

  err_t magneticrotary4_set_rotation_direction ( magneticrotary4_t *ctx, uint8_t direction );

• magneticrotary4_calibrate_zero_position This function calibrates the sensor to zero Angle position.

  err_t magneticrotary4_calibrate_zero_position ( magneticrotary4_t *ctx );

• magneticrotary4_get_angle This function reads the absolute position raw data and converts it to degrees (Angle).

  err_t magneticrotary4_get_angle ( magneticrotary4_t *ctx, float *angle );

Example Description

This example demonstrates the use of Magnetic Rotary 4 Click board by reading and displaying the magnet (potentiometer) angular position in degrees.

The demo application is composed of two sections :

Application Init

Initializes the driver, sets the rotation direction, and calibrates the sensor for potentiometer zero position.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    magneticrotary4_cfg_t magneticrotary4_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.
    magneticrotary4_cfg_setup( &magneticrotary4_cfg );
    MAGNETICROTARY4_MAP_MIKROBUS( magneticrotary4_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == magneticrotary4_init( &magneticrotary4, &magneticrotary4_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( MAGNETICROTARY4_ERROR == magneticrotary4_set_rotation_direction ( &magneticrotary4, MAGNETICROTARY4_DIRECTION_CW ) )
    {
        log_error( &logger, " Set rotation direction." );
        for ( ; ; );
    }

    if ( MAGNETICROTARY4_ERROR == magneticrotary4_calibrate_zero_position ( &magneticrotary4 ) )
    {
        log_error( &logger, " Calibrate zero position." );
        for ( ; ; );
    }

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

Application Task

Reads the magnet (potentiometer) angular position in degrees every 100ms and displays the results on the USB UART.

void application_task ( void )
{
    float angle;
    if ( MAGNETICROTARY4_OK == magneticrotary4_get_angle ( &magneticrotary4, &angle ) )
    {
        log_printf( &logger, " Angle: %.1f degrees\r\n\n", angle );
        Delay_ms ( 100 );
    }
}

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.MagneticRotary4

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.