Create Heart rate monitoring and emergency call (two-in-one circuit)

#include <SPI.h>
#include <AFE4403_Raw.h>
#define Pressure_Sensor_pin A1
//#include <SoftwareSerial.h>
#include <TinyScreen.h>
#include <Wire.h>

#define  BLACK           0x00
#define BLUE            0xE0
#define RED             0x03
#define GREEN           0x1C
#define DGREEN           0x0C
#define YELLOW          0x1F
#define WHITE           0xFF
#define ALPHA           0xFE
#define BROWN           0x32



int RDY_FLAG=0,count=0;
int Pressure_Sensor;
AFE4403 AFE;
//SoftwareSerial Blue(5,1);
TinyScreen display = TinyScreen(0);


void setup() {
  pinMode(A1,INPUT);
  
  Serial.begin(9600);
 // Blue.begin(9600);

  SPI.begin();
  SPI.setDataMode(SPI_MODE0);	//CPHA = CPOL = 0    MODE = 0
  SPI.setBitOrder(MSBFIRST);
  AFE.pinselect(10,3,4); //SPI_STE , AFE4403_PWDN , AFE4403_RESET
  AFE.register_set();
  AFE.green_led(true);
  AFE.setLEDCurrent(30,30);
  AFE.setGain(0,0,0,0,2);
  //AFE.dumpreg();
  attachInterrupt(digitalPinToInterrupt(2),ADC_RDY_FLAG,RISING);

  Wire.begin();//initialize I2C before we can initialize TinyScreen- not needed for TinyScreen+
  display.begin();
  //setBrightness(brightness);//sets main current level, valid levels are 0-15
  display.setBrightness(10);
  
}


void loop() {
  Pressure_Sensor=analogRead(Pressure_Sensor_pin);
  if(RDY_FLAG)
  {
     RDY_FLAG=0; 
     detachInterrupt(digitalPinToInterrupt(2)); 
     AFE.pulse_calculation(count);
     
     if(count>=10 && AFE.dVal>0){
       Serial.print("Pressure : ");
       Serial.println(Pressure_Sensor);
       Serial.print("BPM : ");
       Serial.println(AFE.dVal);
       display.setFont(liberationSans_14ptFontInfo);
       display.setCursor(0,20);
       display.fontColor(BLUE,BLACK);
       display.clearScreen();
       display.print((int)AFE.dVal);
       display.setFont(liberationSans_14ptFontInfo);
       display.setCursor(35,20);
       display.fontColor(RED,BLACK);
       display.print("BPM");

       delay(300);
     }
     
     if(count>=10)
     {
       count=0;
     }
     attachInterrupt(digitalPinToInterrupt(2),ADC_RDY_FLAG,RISING);
  }
  
}
void ADC_RDY_FLAG() //interrupt Flag
{ 
  RDY_FLAG=1;
  count+=1;
}

Heart rate monitoring and emergency call (two-in-one circuit)

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