#include <Wire.h>
#include <I2C_RTC.h>
int sqw_pin_9 = 9 ;
int sqw_pin_10 = 10 ;
int clockPin = 12;
int dataPin = 11;
int j[10] = {0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8, 0x80, 0x90};
int time_loop = 0;

static DS3231 RTC;

void setup()
{
  pinMode(clockPin, OUTPUT);
  pinMode(dataPin, OUTPUT);
  pinMode(sqw_pin_9,OUTPUT);
  pinMode(sqw_pin_10,OUTPUT);
  Serial.begin(9600);
  RTC.begin();
  

  RTC.setHourMode(CLOCK_H12);
  
  //RTC.setHourMode(CLOCK_H24);

  if (RTC.getHourMode() == CLOCK_H12)
  {
    //RTC.setMeridiem(HOUR_PM);
  }

  //RTC.setDay(22);
 // RTC.setMonth(5);
 // RTC.setYear(2020);
  //RTC.setHours(12);
  ///RTC.setMinutes(24);
  //RTC.setSeconds(34);
  

  RTC.setWeek(1);
  RTC.enableSqwePin();
  
  //RTC.setDate(22,07,29);
  //RTC.setTime(22,10,20);
  
}
void loop() 

{

for(int time_loop = 0; time_loop < 30; time_loop++){
delay(1000);
while (Serial.available() > 0) {
String teststr_h_0_a = Serial.readString();  //read until timeout

  Serial.println("WELCOME TO CLOCK ADJUST MENU");
  Serial.println("PLEASE ENTER HOURS (e.g. 01 for AM and 13 for PM)");
while (Serial.available() == 0) {}  //wait for data available
  String teststr_h_0 = Serial.readString();  //read until timeout
  Serial.println("Hours: ");
  Serial.print(teststr_h_0);
  RTC.setHours(teststr_h_0.toInt());

Serial.println("PLEASE ENTER MINUITES");
while (Serial.available() == 0) {}    //wait for data available
  String teststr_m_0 = Serial.readString();  //read until timeout
  Serial.println("Min: ");
  Serial.println(teststr_m_0);
  RTC.setMinutes(teststr_m_0.toInt());

Serial.println("PLEASE ENTER SECONDS");
while (Serial.available()  == 0) {}     //wait for data available
  String teststr_s_0 = Serial.readString();  //read until timeout
  Serial.println("sec: ");
  Serial.print(teststr_s_0);
  RTC.setSeconds(teststr_s_0.toInt());  

 Serial.println("PLEASE ENTER DATE");
while (Serial.available()  == 0) {}     //wait for data available
  String teststr_D_0 = Serial.readString();  //read until timeout
  Serial.println("Date: ");
  Serial.print(teststr_D_0);
  RTC.setDay(teststr_D_0.toInt());   

Serial.println("PLEASE ENTER MONTH");
while (Serial.available()  == 0) {}     //wait for data available
  String teststr_M_0 = Serial.readString();  //read until timeout
  Serial.println("Month: ");
  Serial.print(teststr_M_0);
  RTC.setMonth(teststr_M_0.toInt());     

Serial.println("PLEASE ENTER YEAR");
while (Serial.available()  == 0) {}     //wait for data available
  String teststr_Y_0 = Serial.readString();  //read until timeout
  Serial.println("YEAR: ");
  Serial.print(teststr_Y_0);
  RTC.setYear(teststr_Y_0.toInt());       

  time_loop = 0;
  main_clock();



  
} 
}


time_loop = 0;
main_clock();



}

 

void main_clock()

{
  
  switch (RTC.getWeek())
  {
    case 1:
      Serial.print("SUN");
      break;
    case 2:
      Serial.print("MON");
      break;
    case 3:
      Serial.print("TUE");
      break;
    case 4:
      Serial.print("WED");
      break;
    case 5:
      Serial.print("THU");
      break;
    case 6:
      Serial.print("FRI");
      break;
    case 7:
      Serial.print("SAT");
      break;
  }
  Serial.print(" ");
  Serial.print(RTC.getDay());
  Serial.print("-");
  Serial.print(RTC.getMonth());
  Serial.print("-");
  Serial.print(RTC.getYear());

  Serial.print(" ");

  Serial.print(RTC.getHours());
  Serial.print(":");
  Serial.print(RTC.getMinutes());
  Serial.print(":");
  Serial.print(RTC.getSeconds());
  Serial.print(" ");

  if (RTC.getHourMode() == CLOCK_H12)
  {
    if(RTC.getMeridiem() == HOUR_AM)
      Serial.println(" AM");
    if (RTC.getMeridiem() == HOUR_PM)
      Serial.println(" PM");     
  }

for (int time_loop = 0; time_loop < 11; time_loop++) {
int count_1 = RTC.getHours() / 10 ; // 1 o/p 
int count_1_r = RTC.getHours() % 10 ;// 2 o/p 
int count_2 = RTC.getMinutes() / 10 ; // 1 o/p 
int count_3 = RTC.getMinutes() % 10 ;// 2 o/p 



digitalWrite(clockPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, j[count_3]);
//delay(10);
digitalWrite(clockPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, j[count_2]);
//delay(10);
digitalWrite(clockPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, j[count_1_r]);
//delay(10);
digitalWrite(clockPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, j[count_1]);
//delay(10);
delay(1000);
digitalWrite(sqw_pin_9, !digitalRead(sqw_pin_9));
digitalWrite(sqw_pin_10, !digitalRead(sqw_pin_10));
//  delay(1);

}

// -------------------------------------------------------------------------
// -- CLOCK ENDS HERE ---------------------------------------------
//--------------------------------------------------------------------------


// -------------------------------------------------------------------------
// -- DISPLAY TEMPERATURE HERE ---------------------------------------------
//--------------------------------------------------------------------------
time_loop = 0;
for (int time_loop = 0; time_loop < 11; time_loop++) {
Serial.print(RTC.getTemp());
float temp_now = RTC.getTemp();
int count = temp_now*100;
int count_3 = count/1000 ; // display it 9

int count_3_r = count % 1000 ; //812
//int count_2 = count_3_r; 
int count_2 = count_3_r / 100 ; // display it 8
int count_2_r = count_3_r % 100; // 12
//int count_1 = count_2_r ;
int count_1 = count_2_r / 10 ; // 1 o/p 
int count_1_r = count_2_r % 10 ;// 2 o/p 

digitalWrite(clockPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, j[count_1_r]);
//delay(10);
digitalWrite(clockPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, j[count_1]);
//delay(10);
digitalWrite(clockPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, j[count_2]);
//delay(10);
digitalWrite(clockPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, j[count_3]);
//delay(10);
digitalWrite(sqw_pin_9, HIGH);
digitalWrite(sqw_pin_10, LOW);
delay(1000);
}
// -------------------------------------------------------------------------
// --  TEMPERATURE ENDS   HERE ---------------------------------------------
//--------------------------------------------------------------------------

time_loop = 0;
for (int time_loop = 0; time_loop < 11; time_loop++) {
  
int count_1 = RTC.getDay() / 10 ; // 1 o/p 
int count_1_r = RTC.getDay() % 10 ;// 2 o/p 
int count_2 = RTC.getMonth() / 10 ; // 1 o/p 
int count_3 = RTC.getMonth() % 10 ;// 2 o/p 



digitalWrite(clockPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, j[count_3]);
//delay(10);
digitalWrite(clockPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, j[count_2]);
//delay(10);
digitalWrite(clockPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, j[count_1_r]);
//delay(10);
digitalWrite(clockPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, j[count_1]);
//delay(10);
delay(1000);
digitalWrite(sqw_pin_9, LOW);
digitalWrite(sqw_pin_10, LOW);
//  delay(1);

}

time_loop = 0; 

// this part checks any data on serial port






}