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/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2014 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#pragma once
#include <string>
#include <stdint.h>
#include <sys/time.h>
#include <mraa/gpio.h>
namespace upm {
/**
* @brief Grove Ear-clip Heart Rate Sensor library
* @defgroup groveehr libupm-groveehr
* @ingroup seeed gpio medical
*/
/**
* @library groveehr
* @sensor groveehr
* @comname Grove Ear-clip Heart Rate Sensor
* @type medical
* @man seeed
* @con gpio
*
* @brief API for the Grove Ear-clip Heart Rate Sensor
*
* UPM module for the Grove ear-clip heart rate sensor. It is used to measure your
* heart rate.
*
* @image html groveehr.jpg
* @snippet groveehr.cxx Interesting
*/
class GroveEHR {
public:
/**
* GroveEHR constructor
*
* @param pin Digital pin to use
*/
GroveEHR(int pin);
/**
* GroveEHR destructor
*/
~GroveEHR();
/**
* Returns the time of milliseconds elapsed since initClock()
* was last called.
*
* @return Elapsed milliseconds
*/
uint32_t getMillis();
/**
* Resets the clock
*
*/
void initClock();
/**
* Resets the beat counter to 0. The beat counter should be
* stopped via stopBeatCounter() prior to calling this function.
*
*/
void clearBeatCounter();
/**
* Starts the beat counter
*
*/
void startBeatCounter();
/**
* Stops the beat counter
*
*/
void stopBeatCounter();
/**
* Gets the beat Counter
*
* @return Beat counter
*/
uint32_t beatCounter();
/**
* Computes the heart rate
*
* @return Computed heart rate
*/
int heartRate();
private:
/**
* Beat interrupt service routine (ISR)
*
*/
static void beatISR(void *ctx);
volatile uint32_t m_beatCounter;
struct timeval m_startTime;
mraa_gpio_context m_gpio;
};
}
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