heartrate3

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Heart rate 3 click

Heart rate 3 click is a mikroBUS add-on board whose functionality is determined by two components: an OSRAM’s SFH7050 pulse oximetry and heart rate monitoring module, and a TI AFE4404 (analong-front-end) IC specialized for bio-sensing.

click Product page

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Click library

• Author : Jova Stajkovic
• Date : Dec 2019.
• Type : I2C type

Software Support

We provide a library for the HeartRate3 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 HeartRate3 Click driver.

Standard key functions :

• Config Object Initialization function.

void heartrate3_cfg_setup ( heartrate3_cfg_t *cfg );

• Initialization function.

HEARTRATE3_RETVAL heartrate3_init ( heartrate3_t *ctx, heartrate3_cfg_t *cfg );

• Click Default Configuration function.

void heartrate3_default_cfg ( heartrate3_t *ctx );

Example key functions :

• Function is used to read 32-bit value from register.

uint32_t heartrate3_read_u32 ( heartrate3_t *ctx, uint8_t reg_adr );

• Function is used to set or clear rst pin.

void heartrate3_rst_state ( heartrate3_t *ctx, uint8_t state );

• Function is used to write 32-bit data into register.

void heartrate3_write_data ( heartrate3_t *ctx, uint8_t reg_adr, uint32_t wr_data );

Examples Description

The demo application shows reflected red, green and ir values.

The demo application is composed of two sections :

Application Init

Initalizes click driver, resets the device, applies default settings and makes an initial log.

void application_init ( void )
{
    log_cfg_t log_cfg;
    heartrate3_cfg_t cfg;

    //  Logger initialization.

    log_cfg.level = LOG_LEVEL_DEBUG;
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_printf( &logger, "---- Application Init ----\r\n" );

    //  Click initialization.

    heartrate3_cfg_setup( &cfg );
    HEARTRATE3_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    heartrate3_init( &heartrate3, &cfg );
    log_printf( &logger, "----------------------\r\n" );
    log_printf( &logger, "  Heart rate 3 Click  \r\n" );
    log_printf( &logger, "----------------------\r\n" );
    
    heartrate3_rst_state ( &heartrate3, HEARTRATE3_PIN_STATE_LOW );
    Delay_us( 50 );
    
    heartrate3_rst_state ( &heartrate3, HEARTRATE3_PIN_STATE_HIGH );
    Delay_ms( 100 );
    
    heartrate3_default_cfg ( &heartrate3 );
    Delay_ms( 100 );
    
    log_printf( &logger, "     Initialised!     \r\n" );
    log_printf( &logger, "----------------------\r\n" );
}
  

Application Task

This example demonstrates the use of Heart rate 3 board. It is set in default mode, and reads reflected red, green and ir values and displays the results on USART terminal.

void application_task ( void )
{
    led_2 = heartrate3_read_u32( &heartrate3, HEARTRATE3_LED2VAL );
    log_printf( &logger, "LED2: %d \r\n", led_2 );
    
    aled_2 = heartrate3_read_u32( &heartrate3, HEARTRATE3_ALED2VAL );
    log_printf( &logger, "ALED2: %d \r\n", aled_2 );
    
    led_1 = heartrate3_read_u32( &heartrate3, HEARTRATE3_LED1VAL );
    log_printf( &logger, "LED1: %d \r\n", led_1 );
    
    aled_1 = heartrate3_read_u32( &heartrate3, HEARTRATE3_ALED1VAL );
    log_printf( &logger, "ALED1: %d \r\n", aled_1 );
    
    led_2_aled_2 = heartrate3_read_u32( &heartrate3, HEARTRATE3_LED2_ALED2VAL );
    log_printf( &logger, "LED2ALED2: %d \r\n", led_2_aled_2 );
    
    led_1_aled_1 = heartrate3_read_u32( &heartrate3, HEARTRATE3_LED1_ALED1VAL );
    log_printf( &logger, "LED1ALED1: %d \r\n", led_1_aled_1 );
    
    log_printf( &logger, "----------------------\r\n" );
    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.HeartRate3

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.

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