Angle 3 click

Angle 3 click carries the AK7451, a magnetic rotational angle sensor. The click is designed to run on a 5V power supply.

click Product page

Click library

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

Software Support

We provide a library for the Angle3 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 Angle3 Click driver.

Standard key functions :

• angle3_cfg_setup Config Object Initialization function.

  void angle3_cfg_setup ( angle3_cfg_t *cfg ); 

• angle3_init Initialization function.

  err_t angle3_init ( angle3_t *ctx, angle3_cfg_t *cfg );

Example key functions :

• angle3_write_data Writes given data to given address.

  void angle3_write_data ( angle3_t* ctx, uint8_t opcode, uint8_t reg, uint16_t write_data );

• angle3_read_data Reads data from given address.

  uint16_t angle3_read_data ( angle3_t* ctx, uint8_t opcode, uint8_t reg );

• angle3_read_angle_data Function reads the latest angle output data.

  uint16_t angle3_read_angle_data( angle3_t* ctx );

Examples Description

This application reads data from the angle sensor, calculates it to degrees and writes it to the terminal.

The demo application is composed of two sections :

Application Init

Initialization driver enable's - SPI, set normal mode and start write log.

void application_init ( void )
{
    log_cfg_t log_cfg;
    angle3_cfg_t angle3_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.
    angle3_cfg_setup( &angle3_cfg );
    ANGLE3_MAP_MIKROBUS( angle3_cfg, MIKROBUS_1 );
    if ( ANGLE3_ERROR == angle3_init( &angle3, &angle3_cfg ) )
    {
        log_info( &logger, "---- Application Init Error ----" );
        log_info( &logger, "---- Please, run program again... ----" );
        for ( ; ; );
    }
    angle3_default_cfg ( &angle3 );

    log_info( &logger, "---- Application Task ----\n" );
}

Application Task

Angle 3 Click communicates with registers via SPI, reads data from the angle sensor, calculates it to degrees and writes it to the terminal.

void application_task ( void )
{
    static uint16_t angle_value_old = 0;

    if ( angle3_read_error( &angle3 ) )
    {
        uint16_t angle_value = angle3_read_angle_data( &angle3 );

        if ( angle_value_old != angle_value )
        {
            float angle_data_degrees = angle3_calculate_degrees( &angle3, angle_value );

            log_printf( &logger, " Angle : %.1f deg\r\n", angle_data_degrees );

            angle_value_old = angle_value;

            Delay_ms ( 300 );
        }
    }
    else
    {
        log_printf( &logger, " Magnetic Field Too Weak\r\n" );

        angle_value_old = 0;
        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.Angle3

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.