Gyro 3 click

Gyro 3 click is a three-axis gyroscope Click board™ that can sense motion over three perpendicular axes. It is equipped with the I3G4250, a three-axis digital gyroscope.

click Product page

Click library

• Author : MikroE Team
• Date : Dec 2019.
• Type : I2C/SPI type

Software Support

We provide a library for the Gyro3 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 Gyro3 Click driver.

Standard key functions :

• Config Object Initialization function.

  void gyro3_cfg_setup ( gyro3_cfg_t *cfg );

• Initialization function.

  GYRO3_RETVAL gyro3_init ( gyro3_t ctx, gyro3_cfg_t cfg );

• Click Default Configuration function.

  void gyro3_default_cfg ( gyro3_t *ctx );

Example key functions :

• This function reads value stored in temperature register (26h).

  void gyro3_get_temp ( gyro3_t ctx, uint8_t temperature_value );

• This function reads data level value in FIFO register from FIFO SRC register (2Fh) and stores result in fifo_data_level.

  void gyro3_get_fifo_data_level ( gyro3_t ctx, uint8_t fifo_data_level );

• This function reads values from XYZ axes registers and converts them to degrees per second value.

  void gyro3_get_axes ( gyro3_t ctx, float x_axis, float y_axis, float z_axis, uint8_t measurement_range );

Examples Description

This example checks if new data is available on all three axes, If yes then reads and logs their values.

The demo application is composed of two sections :

Application Init

Initialize I2C driver, basic device configuration, I2C interface, LOG interface and GPIO pins.

void application_init ( void )
{
    log_cfg_t log_cfg;
    gyro3_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.

    gyro3_cfg_setup( &cfg );
    GYRO3_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    gyro3_init( &gyro3, &cfg );
    gyro3_default_cfg( &gyro3 );

    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

Application Task

Check if new data is available on all three axes, If yes then read and log their values.

void application_task ( void )
{
    //  Task implementation.

    gyro3_get_status( &gyro3, &status_register );

    if ((status_register & GYRO3_ZYX_NEW_DATA_MASK) == GYRO3_ZYX_NEW_DATA_MASK)
    {

        gyro3_get_axes( &gyro3, &x_axis, &y_axis, &z_axis, GYRO3_MEAS_RANGE_2000 );

        log_printf( &logger, "\r\nx_axis : %.2f %s\t", x_axis, degrees_per_second );
        log_printf( &logger, "y_axis : %.2f %s\t", y_axis, degrees_per_second );
        log_printf( &logger, "z_axis : %.2f %s\r\n", z_axis, degrees_per_second );      
    } 

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.Gyro3

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.