max30102的算法代码

MAX30102是一款集成了红外LED和光电二极管的心率传感器模块，可用于测量心率和血氧饱和度。以下是一个基于Arduino的MAX30102算法代码示例：

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

#define REPORTING_PERIOD_MS 1000

MAX30105 particleSensor;

uint32_t tsLastReport = 0;
uint32_t lastBeat = 0;
float beatsPerMinute;
int beatAvg;
int beatSum;
int beatCount;

void setup() {
  Serial.begin(115200);
  Serial.println("Initializing...");
  
  particleSensor.begin(Wire, I2C_SPEED_FAST); // Use default I2C port, 400kHz speed
  
  // Configure sensor with these settings
  particleSensor.setup(0x1F, 4, 411, 4096, 18, 4, 411, 4096, 18); // settings for MAX30102
  
  // Initialize variables
  tsLastReport = millis();
  lastBeat = 0;
  beatsPerMinute = 0;
  beatSum = 0;
  beatCount = 0;
  beatAvg = 0;
}

void loop() {
  // Check if enough time has passed to report heart rate
  if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
    // Read data from sensor
    particleSensor.check(); // Check the sensor for new data
    while (particleSensor.available()) { // Read all the available data
      int irValue = particleSensor.getIR();
      uint32_t tsNow = millis();
      
      // Calculate heart rate
      if (checkForBeat(irValue, tsNow)) {
        int delta = tsNow - lastBeat;
        lastBeat = tsNow;
        beatsPerMinute = 60 / (delta / 1000.0);
        beatSum += beatsPerMinute;
        beatCount++;
        beatAvg = beatSum / beatCount;
      }
    }
    
    // Report heart rate
    Serial.print("Heart rate: ");
    Serial.print(beatsPerMinute);
    Serial.print(" bpm, average: ");
    Serial.print(beatAvg);
    Serial.println(" bpm");
    
    // Reset variables
    tsLastReport = millis();
    beatSum = 0;
    beatCount = 0;
    beatAvg = 0;
  }
}

这段代码使用了MAX30105库和heartRate库来读取MAX30102传感器的数据并计算心率。在每个报告间隔时间（REPORTING_PERIOD_MS）内，它读取MAX30102的红外光强度值，检查是否有心跳，并计算心率。然后它将心率报告到串口，并重置变量以准备下一个报告周期。