//#include <Stepper.h>
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

#define enaPin 2              // Enable pin of drive
#define stepPin 3           // Pulse pin of drive 
#define dirPin 4              // Direction pin of drive   
#define button 5                // Button input Pin

int count = 0;
float step_angle = 1.8;
float rpm, delay_const, d;

void custom_delay()
{
  d = ((delay_const/rpm)/2);
  return d;
}

void quarter_rotation()
{
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("TURNING 1st45DEG");
  lcd.setCursor(3,1);
  lcd.print("AT 500 RPM");
  delay(1000);

  digitalWrite (enaPin, LOW);
  digitalWrite (dirPin, HIGH);         // Clockwise
  
  for(int i=0;i<25;i++)
  {
  rpm=500;
  custom_delay();
  digitalWrite (stepPin, HIGH);
  delayMicroseconds(d);
  digitalWrite (stepPin , LOW);
  delayMicroseconds(d);
  }

delay(3000);

  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("TURNING 2nd45DEG");
  lcd.setCursor(3,1);
  lcd.print("AT 200 RPM");
  
  for(int i=0;i<25;i++)
  {
  rpm=200;
  custom_delay();
  digitalWrite (stepPin, HIGH);
  delayMicroseconds(d);
  digitalWrite (stepPin , LOW);
  delayMicroseconds(d);
  }
  digitalWrite (enaPin, LOW);
  delay(1000);
  lcd.clear();
}

void setup()
{
  lcd.init();
  lcd.backlight();
  lcd.clear();
  
  pinMode (stepPin, OUTPUT);          // Pulse Pin as output
  pinMode (dirPin, OUTPUT);         // Direction pin as output
  pinMode (enaPin, OUTPUT);          // Enable pin as output
  digitalWrite (stepPin, LOW);          // Pulse pin is set LOW
  digitalWrite (dirPin, LOW);            // Direction pin is set LOW
  digitalWrite (enaPin, LOW);          // Enable pin is set HIGH (always disabled)
  pinMode (button, INPUT_PULLUP);         // Button input
  
  delay_const = step_angle * 60 * 1000 * 1000 / (360);

}

void loop()
{
  lcd.setCursor(0,0);
  lcd.print("MOTOR IS:-");
  lcd.setCursor(5,1);
  lcd.print("- OFF -");
  
  while(!digitalRead(button))
  {
    lcd.setCursor(5,1);
    lcd.print("- ON - ");
    delay(2000);
    quarter_rotation();
  }

}