MAX30102读取完16个红光和红外数据计算血氧心率值的代码

以下是使用Arduino和MAX30102传感器读取血氧和心率值的示例代码：

#include <Wire.h>
#include "MAX30105.h"
#include "heartRate.h"

MAX30105 particleSensor;

const byte RATE_SIZE = 4; // Increase this for more averaging. 4 is good.
byte rates[RATE_SIZE]; // Array of heart rates
byte rateSpot = 0;
long lastBeat = 0; // Time at which the last beat occurred
float beatsPerMinute;
int beatAvg;

void setup()
{
  Serial.begin(115200); // initialize serial communication at 115200 baud
  Serial.println("Initializing...");
  
  if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) // Use default I2C port, 400kHz speed
  {
    Serial.println("MAX30105 was not found. Please check wiring/power.");
    while (1);
  }

  particleSensor.setup();
  particleSensor.setPulseAmplitudeRed(0x0A); // Turn Red LED to low to indicate sensor is running
  particleSensor.setPulseAmplitudeGreen(0);
}

void loop()
{
  long irValue = particleSensor.getIR(); // Reading IR value
  if (checkForBeat(irValue) == true)
  {
    // We sensed a beat!
    long delta = millis() - lastBeat;
    lastBeat = millis();

    beatsPerMinute = 60 / (delta / 1000.0);
    if (beatsPerMinute < 255 && beatsPerMinute > 20)
    {
      rates[rateSpot++] = (byte)beatsPerMinute; // Store the value in the array
      rateSpot %= RATE_SIZE; // Wrap variable

      // Take average of readings
      beatAvg = 0;
      for (byte x = 0 ; x < RATE_SIZE ; x++)
        beatAvg += rates[x];
      beatAvg /= RATE_SIZE;
    }
  }

  Serial.print("Heart rate: ");
  Serial.print(beatAvg);
  Serial.print(" bpm");

  Serial.print("\tSpO2: ");
  Serial.print(particleSensor.getSpO2());
  
  Serial.println();
  
  delay(20);
}

这个代码使用了MAX30105库和心率库来计算心率和血氧饱和度。在主循环中，首先读取红外线值并检查是否有心跳。如果检测到心跳，则计算心率并存储在一个数组中。然后，计算数组中所有值的平均值，并输出到串口。最后，读取红外线和红光值以计算血氧饱和度，并输出到串口。整个循环延迟20毫秒以降低CPU负载。