#include<Wire.h> 
#include<LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2); //0x27 is the I2C address of the LCD module.
int TimeHours10s =  0;
int TimeHours1s =  0;
int TimeMinutes10s =  0; //integer variables to store the time and alarm values
int TimeMinutes1s =  0;
int TimeSeconds10s =  0;
int TimeSeconds1s =  0;
int AlarmHours10s =  0;
int AlarmHours1s =  0;
int AlarmMinutes10s =  0;
int AlarmMinutes1s =  0;
int AlarmSeconds10s =  0;
int AlarmSeconds1s =  0; 

int AlarmSet = 6; //integer variables that represent the Arduino digital pin numbers
int TimeSet = 7;
int Min = 8;
int Hour = 9; 
int Buzzer =10;

void setup() //pinMode() function is used to set the mode of each digital pin
{
  // initialize I/O pins.
  //pinMode(Triger, OUTPUT);  
  pinMode(AlarmSet,INPUT_PULLUP);  //Bit_6
  pinMode(TimeSet, INPUT_PULLUP);  //Bit_7
  pinMode(Hour, INPUT_PULLUP);  //Bit_8
  pinMode(Min, INPUT_PULLUP);  //Bit_9
  pinMode(Buzzer, OUTPUT);  //Bit_10
  
  // set up the LCD's number of columns and rows:
  lcd.init();
  lcd.backlight(); //turns on the backlight of the LCD display
}

void loop() 
{
CalculateTime();  
ShowTime();
ShowAlarm();
delay(500);
CompareAlarmTime();
//-------------------------------------Adj Alarm Value--------------
if(digitalRead(AlarmSet)== LOW && digitalRead(Min)== LOW)
{
  AlarmMinutes1s++;
  delay(500);
  CalculateAlarm();
}
if(digitalRead(AlarmSet)== LOW && digitalRead(Hour)== LOW)
{
  AlarmHours1s++;
  delay(500);
  CalculateAlarm();
}
//----------------------------------------------------------------


//-------------------------------------Adj Time Value--------------
if(digitalRead(TimeSet)== LOW && digitalRead(Min)== LOW)
{
  TimeMinutes1s++;
  delay(500);
  CalculateTime();
}
if(digitalRead(TimeSet)== LOW && digitalRead(Hour)== LOW)
{
  TimeHours1s++;
  delay(500);
  CalculateTime();
}

delay(500);
}

 void ShowTime()
  {
  //--------------------------------------------
  // Turn on the display
  lcd.display();
  lcd.setCursor(0, 0); // top left
  lcd.print("Time  ");//
  if(TimeHours10s == 0)
  lcd.print(" ");//
  else
  lcd.print(TimeHours10s);//
  lcd.print(TimeHours1s);//
  lcd.print(":");//
  lcd.print(TimeMinutes10s);//
  lcd.print(TimeMinutes1s);//
  lcd.print(":");//
  lcd.print(TimeSeconds10s);//
  lcd.print(TimeSeconds1s);//
  lcd.setCursor(0, 0); // top left
  }

   void ShowAlarm()
  {
  //--------------------------------------------
  // Turn on the display
  //lcd.display();
  lcd.setCursor(0, 1); // bottom left
  lcd.print("Alarm ");//
  if(AlarmHours10s == 0)
  lcd.print(" ");//
  else
  lcd.print(AlarmHours10s);//
  lcd.print(AlarmHours1s);//
  lcd.print(":");//
  lcd.print(AlarmMinutes10s);//
  lcd.print(AlarmMinutes1s);//
  lcd.print(":");//
  lcd.print(AlarmSeconds10s);//
  lcd.print(AlarmSeconds1s);//
  lcd.setCursor(0, 1); // bottom left
  }

void CalculateTime()
{
 TimeSeconds1s++;
  if(TimeSeconds1s == 10)
  {
  TimeSeconds1s = 0;
  TimeSeconds10s++;
  }
  if(TimeSeconds10s == 6)
  {
  TimeSeconds10s = 0;
  TimeSeconds1s = 0;
  TimeMinutes1s++;
  }
  if(TimeMinutes1s == 10)
  {
  TimeMinutes1s = 0;
  TimeSeconds10s = 0;
  TimeSeconds1s = 0;
  TimeMinutes10s++;
  }
  if(TimeMinutes10s == 6)
  {
  TimeMinutes10s = 0;
  TimeMinutes1s = 0;
  TimeSeconds10s = 0;
  TimeSeconds1s = 0;
  TimeHours1s++;
  }
  if(TimeHours1s == 10) 
  {
  TimeHours1s=0;
  TimeMinutes10s = 0;
  TimeMinutes1s = 0;
  TimeSeconds10s = 0;
  TimeSeconds1s = 0;
  TimeHours10s++;
  }
  if(TimeHours10s == 2 && TimeHours1s == 4) 
  {
  TimeHours10s=0; 
  TimeHours1s=0;
  TimeMinutes10s = 0;
  TimeMinutes1s = 0;
  TimeSeconds10s = 0;
  TimeSeconds1s = 0;
 
  } 
}

  void CalculateAlarm()
{
 //AlarmSeconds1s++;
  if(AlarmSeconds1s == 10)
  {
  AlarmSeconds1s = 0;
  AlarmSeconds10s++;
  }
  if(AlarmSeconds10s == 6)
  {
  AlarmSeconds10s = 0;
  AlarmSeconds1s = 0;
  AlarmMinutes1s++;
  }
  if(AlarmMinutes1s == 10)
  {
  AlarmMinutes1s = 0;
  AlarmSeconds10s = 0;
  AlarmSeconds1s = 0;
  AlarmMinutes10s++;
  }
  if(AlarmMinutes10s == 6)
  {
  AlarmMinutes10s = 0;
  AlarmMinutes1s = 0;
  AlarmSeconds10s = 0;
  AlarmSeconds1s = 0;
  AlarmHours1s++;
  }
  if(AlarmHours1s == 10) 
  {
  AlarmHours1s=0;
  AlarmMinutes10s = 0;
  AlarmMinutes1s = 0;
  AlarmSeconds10s = 0;
  AlarmSeconds1s = 0;
  AlarmHours10s++;
  }
  if(AlarmHours10s == 2 && AlarmHours1s == 4) 
  {
  AlarmHours10s=0; 
  AlarmHours1s=0;
  AlarmMinutes10s = 0;
  AlarmMinutes1s = 0;
  AlarmSeconds10s = 0;
  AlarmSeconds1s = 0;
  } 
}
 void CompareAlarmTime()
 {
  if(TimeHours10s == AlarmHours10s && TimeHours1s == AlarmHours1s && TimeMinutes10s == AlarmMinutes10s && TimeMinutes1s == AlarmMinutes1s )
  {
   digitalWrite(Buzzer, HIGH); 
   delay(100);
   digitalWrite(Buzzer, LOW); 
   delay(100);
  }
 }