heartrate2

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Heart Rate 2 Click

Heart Rate 2 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

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Click Library

• Author : MikroE Team
• Date : Feb 2020.
• Type : I2C type

Software Support

Example Description

This example demonstrates the use of Heart rate 2 Click board.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.HeartRate2

Example Key Functions

• heartrate2_cfg_setup Config Object Initialization function.

void heartrate2_cfg_setup ( heartrate2_cfg_t *cfg );

• heartrate2_init Initialization function.

err_t heartrate2_init ( heartrate2_t *ctx, heartrate2_cfg_t *cfg );

• heartrate2_default_cfg Click Default Configuration function.

void heartrate2_default_cfg ( heartrate2_t *ctx );

• heartrate2_set_en This function settings en pin status.

void heartrate2_set_en ( heartrate2_t *ctx, uint8_t state );

• heartrate2_soft_reset This function restarts device.

void heartrate2_soft_reset ( heartrate2_t *ctx );

• heartrate2_read_fifo This function reads data buffer from the desired register.

void heartrate2_read_fifo ( heartrate2_t *ctx, heartrate2_fifo_data_t *fifo );

Application Init

Initilizes the driver, resets the device, checks the device ID and applies default settings.

void application_init ( void )
{
    log_cfg_t log_cfg;
    heartrate2_cfg_t cfg;
    uint8_t rd_stat;

    /** 
     * 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.

    heartrate2_cfg_setup( &cfg );
    HEARTRATE2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    heartrate2_init( &heartrate2, &cfg );
    
    log_printf( &logger, "Configuring the module...\r\n" );
    Delay_ms ( 1000 );
    
    heartrate2_set_en( &heartrate2, HEARTRATE2_PIN_HIGH );
    Delay_ms ( 100 );
    heartrate2_soft_reset ( &heartrate2 );
    
    rd_stat = heartrate2_generic_read( &heartrate2, HEARTRATE2_REG_PART_ID );

    if ( rd_stat != HEARTRATE2_DEV_ID )
    {
        log_error( &logger, "---- WRONG ID ----" );
        log_printf( &logger, "Please restart your system.\r\n" );
        for ( ; ; );
    }
    
    heartrate2_default_cfg( &heartrate2, HEARTRATE2_CONFIG_GREEN );
    log_printf( &logger, "The module has been configured!\r\n" );
    Delay_ms ( 1000 );
}

Application Task

Reads the data from Green diode and displays the results on USB UART if the measured data is above defined threshold, otherwise, it displays a desired message on the terminal.

void application_task ( void )
{
    heartrate2_fifo_data_t fifo_object;

    heartrate2_read_fifo( &heartrate2, &fifo_object );

    if ( fifo_object.tag == HEARTRATE2_FIFO_TAG_PPG1_LEDC1 )
    {
        counter++;
        if ( fifo_object.data_val > 1000 )
        {
            log_printf( &logger, "%lu;\r\n", fifo_object.data_val );
            counter = 1000;
        }
        else if ( counter > 1000 )
        {
            log_printf( &logger, "Please place your index finger on the sensor.\r\n" );
            counter = 0;
        }
    }
}

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

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