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Smart Sens click

‍Smart Sens Click is a compact add-on board that contains an intelligent sensor hub with an integrated IMU sensor. This board utilizes the BHI260 and BMM150, an environmental sensor and magnetometer from Bosch Sensortech. The BHI260 includes a programmable and powerful 32-bit MCU, a 6-axis IMU, and a robust software framework. In addition to its internal functions, it also performs signal data processing from the BMM150 that performs measurements of the magnetic field in three perpendicular axes.

click Product page

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Click library

• Author : MikroE Team
• Date : Oct 2021.
• Type : I2C/SPI type

Software Support

We provide a library for the Smart Sens 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 Smart Sens Click driver.

Standard key functions :

• smartsens_cfg_setup Config Object Initialization function.

  void smartsens_cfg_setup ( smartsens_cfg_t *cfg );

• smartsens_init Initialization function.

  err_t smartsens_init ( smartsens_t *ctx, smartsens_cfg_t *cfg );

• smartsens_default_cfg Click Default Configuration function.

  err_t smartsens_default_cfg ( smartsens_t *ctx );

Example key functions :

• smartsens_cmd_write Send command.

  err_t smartsens_cmd_write ( smartsens_t *ctx, uint16_t cmd, uint8_t *cmd_buf, uint16_t cmd_len );

• smartsens_get_parameter Get command parameters resposne.

  err_t smartsens_get_parameter ( smartsens_t *ctx, uint16_t parameter, uint8_t *parameter_buf, uint16_t *parameter_len );

• smartsens_power_on_device Power on device boot/upload firmware to device.

  err_t smartsens_power_on_device( smartsens_t *ctx );

Example Description

‍This example showcases the ability of the Smart Sens click board.

It has multiple examples that you can easily select with the defines at the top of the main. There are 5 examples: Euler, Quaternion, and Vector (Accelerometer, Gyroscope, Magnetometer).

The demo application is composed of two sections :

Application Init

‍Initialization of communication modules (SPI/I2C) and additional

pins(int_pin, rst). After that going through reset sequence and checking device and product IDs, interrupt mask, and host control is set to 0, so every interrupt enabled. If boot status is OK boot sequence is initiated, depending on the defines from the library header it will use RAM or Flash type of the boot. If RAM is selected firmware image first needs to be uploaded to RAM and then it will be booted. If Flash example is selected it will try to boot firmware first if it fails it will then write firmware image to flash and then try to boot it again. When firmware boot is finished Kernel version and Feature registers will be read to check if the firmware is loaded. Then all the callback function will be registered(meta event callback and whatever type of example parser you set), and driver will update the list of virtual sensors present, and finally will configure virtual sensor that will be used in the selected example.

void application_init ( void )
{
    log_cfg_t log_cfg;  
    smartsens_cfg_t smartsens_cfg;  
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );
 
    // Click initialization.
    smartsens_cfg_setup( &smartsens_cfg );
    SMARTSENS_MAP_MIKROBUS( smartsens_cfg, MIKROBUS_1 );
    err_t init_flag = smartsens_init( &smartsens, &smartsens_cfg );
    if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    /* It can take a few seconds to configure and boot device */
    log_info( &logger, " Configuring device..." );
    if ( SMARTSENS_ERROR == smartsens_default_cfg ( &smartsens ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
 
    log_info( &logger, " Setting callbacks..." );
    /* Set callbacks */
    if ( smartsens_register_fifo_parse_callback( &smartsens, SMARTSENS_SYS_ID_META_EVENT,
                                                  parse_meta_event, &accuracy ) )
    {
        log_error( &logger, " FIFO sys meta event." );
        for ( ; ; );
    }
    if ( smartsens_register_fifo_parse_callback( &smartsens, SMARTSENS_SYS_ID_META_EVENT_WU,
                                                  parse_meta_event, &accuracy ) )
    {
        log_error( &logger, " FIFO sys meta event wu." );
        for ( ; ; );
    }
    uint8_t sensor_id;
    smartsens_fifo_parse_callback_t callback;
    void *callback_ref;
#if EULER
    sensor_id = SMARTSENS_SENSOR_ID_ORI;
    callback = parse_euler;
    callback_ref = &accuracy;
#elif QUATERNION
    sensor_id = SMARTSENS_SENSOR_ID_RV;
    callback = parse_quaternion;
    callback_ref = NULL;
#elif VECTOR
    #if ACCELEROMETER
        parse_table.sensor[ SMARTSENS_SENSOR_ID_ACC ].scaling_factor = 1.0f / 4096.0f;
        sensor_id = SMARTSENS_SENSOR_ID_ACC;
    #elif GYROSCOPE
        parse_table.sensor[ SMARTSENS_SENSOR_ID_GYRO ].scaling_factor = 1.0f;
        sensor_id = SMARTSENS_SENSOR_ID_GYRO;
    #elif MAGNETOMETER
        parse_table.sensor[ SMARTSENS_SENSOR_ID_MAG ].scaling_factor = 1.0f;
        sensor_id = SMARTSENS_SENSOR_ID_MAG;
    #else
        #error NO_VECTOR_EXAMPLE_DEFINED
    #endif
    callback = parse_vector_s16;
    callback_ref = &parse_table;
#else
    #error NO_EXAMPLE_DEFINED
#endif
    if ( smartsens_register_fifo_parse_callback( &smartsens, sensor_id, callback, callback_ref ) )
    {
        log_error( &logger, " FIFO sensor id." );
        for ( ; ; );
    }
    /* Go through fifo process */
    if ( smartsens_get_and_process_fifo( &smartsens, work_buffer, WORK_BUFFER_SIZE ) )
    {
        log_error( &logger, " FIFO get and process." );
        for ( ; ; );
    }
    /* Update virtual sensor list in context object */
    if ( smartsens_update_virtual_sensor_list( &smartsens ) )
    {
        log_error( &logger, " Update virtual sensor list." );
        for ( ; ; );
    }
    /* Set virtual sensor configuration */
    float sample_rate = 10.0; /* Read out data at 10Hz */
    uint32_t report_latency_ms = 0; /* Report immediately */
    if ( smartsens_set_virt_sensor_cfg( &smartsens, sensor_id, sample_rate, report_latency_ms ) )
    {
        log_error( &logger, " Set virtual sensor configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

‍Wait for an interrupt to occur, then read wake-up, non-weak-up, and status FIFO.

Parse received data and run the callback parsers to show data on the USB UART.

void application_task ( void )
{
    /* Check interrupt and get and process fifo buffer */
    if ( smartsens_get_interrupt( &smartsens ) )
    {
        /* Data from the FIFO is read and the relevant callbacks if registered are called */
        if ( smartsens_get_and_process_fifo( &smartsens, work_buffer, WORK_BUFFER_SIZE ) )
        {
            log_error( &logger, " Get and process fifo." );
            for ( ; ; );
        }
    }
}

Note

‍Select one of the examples with macros at the top of the main file. Euler example is selected by default.

You can choose one of 3 type of parsers: Euler, Quaternion, Vector. If Vector example is selected you choose one of the 3 sensors to show X, Y, and Z values: Accelerometer, Gyroscope, or Magnetometer.

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.SmartSens

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.

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