pulsensor.h

/*
 * Author: Andrei Vasiliu <andrei.vasiliu@intel.com>
 * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
 * Copyright (c) 2015 Intel Corporation.
 *
 * Credits to Adafruit.
 * Based on Adafruit BMP085 library.
 *
 * 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 <math.h>
#include <mraa/pwm.hpp>
#include <mraa/aio.hpp>
#include <mraa/gpio.hpp>
#include <pthread.h>

#define HIGH               1
#define LOW                0

#define TRUE               HIGH
#define FALSE              LOW

struct clbk_data {
    int is_heart_beat; 
};


#if defined(SWIGJAVA) || defined(JAVACALLBACK)
#include "Callback.h"
#else
typedef void (* callback_handler) (clbk_data);
#endif

class Pulsensor {

public:
#if defined(SWIGJAVA) || defined(JAVACALLBACK)
    Pulsensor(Callback *callback);
#else
    Pulsensor(callback_handler handler);
#endif
    void start_sampler();
    void stop_sampler();

private:
    static void      *do_sample(void *arg);
    pthread_t        sample_thread; 
    uint32_t         sample_counter; 
    uint32_t         last_beat_time; 
    int              threshold; 
    int              ibi_rate[10]; 
    int              ibi; 
    int              trough; 
    int              peak; 
    int              bpm; 
    int              apmlitude; 
    uint8_t          qs; 
    uint8_t          is_pulse; 
    uint8_t          first_beat; 
    uint8_t          second_beat; 
    uint8_t          pin; 
    uint8_t          ret; 
    mraa::Aio        pin_ctx; 
#if defined(SWIGJAVA) || defined(JAVACALLBACK)
    Callback *obj_callback; 
#else
    callback_handler callback; 
#endif
    volatile uint16_t ctx_counter;
};