heartrate8  2.0.0.0
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Heart Rate 8 click

Heart Rate 8 click is an optical biosensor Click boardâ„¢, designed for heart-rate monitoring (HRM). This Click boardâ„¢ employs a specialized sensor that incorporates three LED drivers and two photo-sensing elements, sensitive to green and IR light.

click Product page


Click library

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

Software Support

We provide a library for the HeartRate8 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 HeartRate8 Click driver.

Standard key functions :

  • Config Object Initialization function.

    void heartrate8_cfg_setup ( heartrate8_cfg_t *cfg );

  • Initialization function.

    HEARTRATE8_RETVAL heartrate8_init ( heartrate8_t *ctx, heartrate8_cfg_t *cfg );

  • Click Default Configuration function.

    void heartrate8_default_cfg ( heartrate8_t *ctx );

Example key functions :

  • Function gets the selected data from the determined LED Data registers.

uint8_t heartrate8_get_data ( heartrate8_t *ctx, uint8_t data_select, uint16_t *led_out_on, uint16_t *led_out_off );

  • Function checks INT pin, is interrupt occured or not.

    uint8_t heartrate8_check_int ( heartrate8_t *ctx );

  • Function performs the measurement synchronization.

    void heartrate8_meas_sync ( heartrate8_t *ctx );

Examples Description

This example demonstrates the use of Hearth rate 8 Click board.

The demo application is composed of two sections :

Application Init

Performs the device reset. The device is configured to work in Single Measurement Mode with LED pulsing.

void application_init ( void )
{
log_cfg_t log_cfg;
// Logger initialization.
log_cfg.level = LOG_LEVEL_DEBUG;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, "---- Application Initializing ----" );
// Click initialization.
HEARTRATE8_MAP_MIKROBUS( cfg, MIKROBUS_1 );
heartrate8_init( &heartrate8, &cfg );
Delay_ms( 500 );
heartrate8_default_cfg( &heartrate8 );
i = 0;
log_printf( &logger, "HeartRate 8 is initialized\n");
}

Application Task

Sends command to start measurement cycle, then waits until measurement cycle is finished. When measurement cycle is done, gets LED ON and LED OFF Data for the selected LED driver (GREEN or IR LED) and performs data plotting on serial plotter every 35ms.

void application_task ( void )
{
heartrate8_start_measure( &heartrate8 );
int_check = heartrate8_check_int( &heartrate8 );
while (int_check != HEARTRATE8_INT_ACTIVE)
{
int_check = heartrate8_check_int( &heartrate8 );
}
heartrate8_get_data( &heartrate8, HEARTRATE8_GREEN_DATA_GET, &led_data_on, &led_data_off );
plot_res( led_data_on );
int_check = heartrate8_int_clear( &heartrate8 );
}

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.HeartRate8

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.


heartrate8_default_cfg
void heartrate8_default_cfg(heartrate8_t *ctx)
Click Default Configuration function.
HEARTRATE8_INT_ACTIVE
#define HEARTRATE8_INT_ACTIVE
Definition: heartrate8.h:168
heartrate8_cfg_setup
void heartrate8_cfg_setup(heartrate8_cfg_t *cfg)
Config Object Initialization function.
application_task
void application_task(void)
Definition: main.c:84
HEARTRATE8_MAP_MIKROBUS
#define HEARTRATE8_MAP_MIKROBUS(cfg, mikrobus)
Definition: heartrate8.h:52
heartrate8_check_int
uint8_t heartrate8_check_int(heartrate8_t *ctx)
Interrupt Check function.
heartrate8_start_measure
void heartrate8_start_measure(heartrate8_t *ctx)
Measurement Start function.
heartrate8_init
HEARTRATE8_RETVAL heartrate8_init(heartrate8_t *ctx, heartrate8_cfg_t *cfg)
Initialization function.
heartrate8_int_clear
uint8_t heartrate8_int_clear(heartrate8_t *ctx)
Interrupt Clear function.
heartrate8_cfg_t
Click configuration structure definition.
Definition: heartrate8.h:202
application_init
void application_init(void)
Definition: main.c:63
heartrate8_get_data
uint8_t heartrate8_get_data(heartrate8_t *ctx, uint8_t data_select, uint16_t *led_out_on, uint16_t *led_out_off)
Data Get function.
plot_res
void plot_res(uint16_t plot_data)
Definition: main.c:41
HEARTRATE8_GREEN_DATA_GET
#define HEARTRATE8_GREEN_DATA_GET
Definition: heartrate8.h:157