EHR Class Reference

API for the Ear-clip Heart Rate Sensor. More...

Detailed Description

• ID: ehr
• Name: Ear-clip Heart Rate Sensor
• Category: medical
• Manufacturer: seeed
• Connection: gpio

UPM module for the ear-clip heart rate sensor. It is used to measure your heart rate.

    // Instantiate a  Ear-clip Heart Rate sensor on digital pin D2
    upm::EHR heart(2);

    // set the beat counter to 0, init the clock and start counting beats
    heart.clearBeatCounter();
    heart.initClock();
    heart.startBeatCounter();

    while (shouldRun) {
        // we grab these just for display purposes in this example
        uint32_t millis = heart.getMillis();
        uint32_t beats = heart.beatCounter();

        // heartRate() requires that at least 5 seconds pass before
        // returning anything other than 0
        int hr = heart.heartRate();

        // output milliseconds passed, beat count, and computed heart rate
        cout << "Millis: " << millis << " Beats: " << beats;
        cout << " Heart Rate: " << hr << endl;

        upm_delay(1);
    }

    heart.stopBeatCounter();

Public Member Functions
	EHR (int pin)
	~EHR ()
uint32_t	getMillis ()
void	initClock ()
void	clearBeatCounter ()
void	startBeatCounter ()
void	stopBeatCounter ()
uint32_t	beatCounter ()
int	heartRate ()

Constructor & Destructor Documentation

EHR

(

int

pin

)

EHR constructor

Parameters

pin	Digital pin to use

~EHR

(

)

EHR destructor

Member Function Documentation

uint32_t getMillis

(

)

Returns the time of milliseconds elapsed since initClock() was last called.

Returns

Elapsed milliseconds

void initClock

(

)

Resets the clock

void clearBeatCounter

(

)

Resets the beat counter to 0. The beat counter should be stopped via stopBeatCounter() prior to calling this function.

void startBeatCounter

(

)

Starts the beat counter

void stopBeatCounter

(

)

Stops the beat counter

uint32_t beatCounter

(

)

Gets the beat Counter

Returns

Beat counter

int heartRate

(

)

Computes the heart rate

Returns

Computed heart rate

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The documentation for this class was generated from the following files:

• src/ehr/ehr.hpp
• src/ehr/ehr.cxx