Magneto 14 Click

Magneto 14 Click is a compact add-on board with an accurate and reliable magnetic device. This board features the MA735, a contactless angle sensor with ABZ, and PWM output from Monolithic Power Systems. The MA735 sensor has a 9-bit to 13-bit resolution of the absolute angle encoder.

Click Product page

Click library

• Author : Nenad Filipovic
• Date : May 2023.
• Type : SPI type

Software Support

We provide a library for the Magneto 14 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 Magneto 14 Click driver.

Standard key functions :

• magneto14_cfg_setup Config Object Initialization function.

  void magneto14_cfg_setup ( magneto14_cfg_t *cfg );

• magneto14_init Initialization function.

  err_t magneto14_init ( magneto14_t *ctx, magneto14_cfg_t *cfg );

• magneto14_default_cfg Click Default Configuration function.

  err_t magneto14_default_cfg ( magneto14_t *ctx );

Example key functions :

• magneto14_get_angle Magneto 14 gets the angular position function.

  err_t magneto14_get_angle ( magneto14_t *ctx, float *angle );

• magneto14_get_field_strength Magneto 14 gets the magnetic field strength function.

  err_t magneto14_get_field_strength ( magneto14_t *ctx, uint8_t *field_strength );

• magneto14_get_mgh Magneto 14 gets the MGH function.

  uint8_t magneto14_get_mgh ( magneto14_t *ctx );

Example Description

This library contains API for the Magneto 14 Click driver. The demo application reads and displays the magnet's angular position in degrees.

The demo application is composed of two sections :

Application Init

Initialization of SPI module and log UART. After driver initialization, the app executes a default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    magneto14_cfg_t magneto14_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.
    magneto14_cfg_setup( &magneto14_cfg );
    MAGNETO14_MAP_MIKROBUS( magneto14_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == magneto14_init( &magneto14, &magneto14_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( MAGNETO14_ERROR == magneto14_default_cfg ( &magneto14 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

Application Task

This example demonstrates the use of the Magneto 14 Click board™. Reads and displays the magnet's angular position in degrees. Results are being sent to the UART Terminal, where you can track their changes.

void application_task ( void )
{
    static uint8_t field_strength = 0;
    static float angle = 0;
    if ( MAGNETO14_OK == magneto14_get_field_strength( &magneto14, &field_strength ) )
    {
        if ( ( MAGNETO14_FLD_ST_OK == field_strength ) && 
             ( MAGNETO14_MGH_ST_OK == magneto14_get_mgh( &magneto14 ) ) && 
             ( MAGNETO14_OK == magneto14_get_angle( &magneto14, &angle ) ) )
        {
            log_printf( &logger, " Angle: %.2f [deg]\r\n", angle );
            log_printf( &logger, " -------------------- \r\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.Magneto14

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.