求助大佬们。关于arduino Mstimer中断函数问题

weilaoban

最近用ArduIno uno 做的心率监测输出小玩意儿，用的MStimer库做定时oled输出，然后loop里面一直检测心率。上传程序后发现loop里面只能循环一会儿，大概是两到三次定时时间，然后就停止运行loop一直在运行中断程序。看了半天也不懂到底是哪出了问题，向各位大佬请教，以下是代码：#include <Wire.h>
#include "U8glib.h"
#include <DS3231.h>
#include "MAX30105.h"
#include "heartRate.h"
#include <MsTimer2.h>

MAX30105 particleSensor;
U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE|U8G_I2C_OPT_DEV_0);

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);
  Wire.begin();
MsTimer2::set(1000, XianShi);
MsTimer2::start();
if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) //Use default I2C port, 400kHz speed
  {

    while (1);
  }
  while (Serial.available() == 1) ; //wait until user presses a key
  Serial.read();
  particleSensor.setup(); //Configure sensor with these settings
  particleSensor.setPulseAmplitudeRed(0x0A); //Turn Red LED to low to indicate sensor is running
  particleSensor.setPulseAmplitudeGreen(0); //Turn off Green LED
}

void loop() {
long irValue = particleSensor.getIR();

  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 this reading 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("IR=");
  Serial.print(irValue);
  Serial.print(", BPM=");
  Serial.print(beatsPerMinute);
  Serial.print(", Avg BPM=");
  Serial.print(beatAvg);

  if (irValue < 50000)
    Serial.print(" No finger?");

  Serial.println();
}

void XianShi()
{
  if
  (-1<gForceX&&gForceX<1&&gForceY<0.1&&gForceY>-0.5&&gForceZ<1.5 )
{u8g.firstPage();  
  do {
    draw();
    }
  while( u8g.nextPage() );
      }
else
{u8g.firstPage();  
  do {
    u8g.setFont(u8g_font_ncenB14);
    u8g.drawStr(0,20,"iii ");
  } while( u8g.nextPage() );


  }
}

draw的代码我就不贴了无关紧要