Magneto 2 Click

Magneto 2 Click is a mikroBUS add-on board with Melexis's MLX90316 monolithic rotary position sensor.

Click Product page

Click library

• Author : MikroE Team
• Date : Dec 2019.
• Type : SPI type

Software Support

We provide a library for the Magneto2 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for Magneto2 Click driver.

Standard key functions :

• Config Object Initialization function.

  void magneto2_cfg_setup ( magneto2_cfg_t *cfg );

• Initialization function.

  MAGNETO2_RETVAL magneto2_init ( magneto2_t ctx, magneto2_cfg_t cfg );

Example key functions :

• This function reads 14-bit data value from target register, calculates and converts to float angle value from 0� to 360�.

  float magneto2_read_angle ( magneto2_t* ctx )

• This function takes 14-bit data value from target register.

  uint16_t magneto2_read_data ( magneto2_t* ctx );

Examples Description

This example collects data from the sensor, calculates position of absolute rotary angle and then logs it.

The demo application is composed of two sections :

Application Init

Initializes driver and start write log.

void application_init ( void )
{
    log_cfg_t log_cfg;
    magneto2_cfg_t cfg;

    /** 
     * 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.

    magneto2_cfg_setup( &cfg );
    MAGNETO2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    magneto2_init( &magneto2, &cfg );

    angle_value = 0;
    angle_value_old = -1.0;
}

Application Task

Magneto 2 Click communicates with register via SPI by read from register and calculates position of absolute rotary angle float value. Results are being sent to the Uart Terminal where you can track their changes. All data logs on usb uart when magnetic field is detected.

void application_task ( void )
{
    angle_value = magneto2_read_angle( &magneto2 );
    Delay_100ms();

    if ( angle_value_old != angle_value )
    {
        if ( angle_value != -1 )
        {
            if ( angle_value != 0 )
            {
                log_printf( &logger, "Angle %f\r\n", angle_value );
            }
            else
            {
                log_printf( &logger, "Magnetic field too weak\r\n" );
            }
        }
        else
        {
            log_printf(&logger, "Magnetic field too strong\r\n");
        }

        angle_value_old = angle_value;
        Delay_ms ( 1000 );
    }
}  

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Magneto2

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.