MAX30100_Minimal2.ino

// MAX30100 test
// 2017/05/16 edy
// 2017/05/17
// LED current 4.4mAに変更
// onBeatDetected() 変更
// 脈拍値 整数型に変更
// REPORTING_PERIOD_MS 2000に変更
/*
Arduino-MAX30100 oximetry / heart rate integrated sensor library
Copyright (C) 2016  OXullo Intersecans <x@brainrapers.org>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <Wire.h>
#include "MAX30100_PulseOximeter.h"

#define REPORTING_PERIOD_MS     2000

// PulseOximeter is the higher level interface to the sensor
// it offers:
//  * beat detection reporting
//  * heart rate calculation
//  * SpO2 (oxidation level) calculation
PulseOximeter pox;

uint32_t tsLastReport = 0;

// Callback (registered below) fired when a pulse is detected
void onBeatDetected()
{
    //Serial.println("Beat!");
    digitalWrite(13, HIGH);
    delay(10);
    digitalWrite(13, LOW);
}

void setup()
{
   pinMode(13,OUTPUT);
   Serial.begin(115200);

    Serial.print("Initializing pulse oximeter..");

    // Initialize the PulseOximeter instance
    // Failures are generally due to an improper I2C wiring, missing power supply
    // or wrong target chip
    if (!pox.begin()) {
        Serial.println("FAILED");
        for(;;);
    } else {
        Serial.println("SUCCESS");
    }

    // The default current for the IR LED is 50mA and it could be changed
    //   by uncommenting the following line. Check MAX30100_Registers.h for all the
    //   available options.
    /*
    MAX30100_LED_CURR_0MA = 0x00,
    MAX30100_LED_CURR_4_4MA = 0x01,
    MAX30100_LED_CURR_7_6MA = 0x02,
    MAX30100_LED_CURR_11MA = 0x03,
    MAX30100_LED_CURR_14_2MA = 0x04,
    MAX30100_LED_CURR_17_4MA = 0x05,
    MAX30100_LED_CURR_20_8MA = 0x06,
    MAX30100_LED_CURR_24MA = 0x07,
    MAX30100_LED_CURR_27_1MA = 0x08,
    MAX30100_LED_CURR_30_6MA = 0x09,
    MAX30100_LED_CURR_33_8MA = 0x0a,
    MAX30100_LED_CURR_37MA = 0x0b,
    MAX30100_LED_CURR_40_2MA = 0x0c,
    MAX30100_LED_CURR_43_6MA = 0x0d,
    MAX30100_LED_CURR_46_8MA = 0x0e,
    MAX30100_LED_CURR_50MA = 0x0f
  */
     pox.setIRLedCurrent(MAX30100_LED_CURR_4_4MA);

    // Register a callback for the beat detection
    pox.setOnBeatDetectedCallback(onBeatDetected);
}

void loop()
{
    // Make sure to call update as fast as possible
    pox.update();

    // Asynchronously dump heart rate and oxidation levels to the serial
    // For both, a value of 0 means "invalid"
    if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
        Serial.print("Heart rate:");
        Serial.print((int)pox.getHeartRate());
        Serial.print("bpm / SpO2:");
        Serial.print(pox.getSpO2());
        Serial.print("% / temp:");
        Serial.print(pox.getTemperature());
        Serial.println("C");

        tsLastReport = millis();
    }
}