#include <Keypad.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#include "TimerOne.h"
#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);
const byte ROWS = 4; 
const byte COLS = 4; 
char hexaKeys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS] = {2,3,4,5}; 
byte colPins[COLS] = {6,7,8,9}; 
Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); 
int hourButton = 12;
int minuteButton = 11;
int hourCursor = 4;
int minuteCursor = 7;
char hour[3];
char minute[3];
int hours;
int minutes;
int seconds=50;
void setup(){
  pinMode(hourButton, INPUT_PULLUP);
  pinMode(minuteButton, INPUT_PULLUP);
  Serial.begin(9600);
  Timer1.initialize(1000000);//初始化定时器为1s
  Timer1.attachInterrupt( timerIsr );//设置中断回调函数
  lcd.init();
  lcd.backlight();
  lcd.setCursor(6,0);
    lcd.print(":");
    lcd.setCursor(9,0);
    lcd.print(":");
    
  
}
void inputNum(char time,int cursor)
{
  if(time)
   {
     lcd.setCursor(cursor,0);
     lcd.blink();
     lcd.print(time);
     cursor++;
   }
  
  
}
void timerIsr()//定时器中断处理函数
{
  
  minutes= atoi(minute);
  hours = atoi(hour);
  seconds++;
  if (seconds >59)
  {
    seconds = 0;
    minute[1]++;
    if(minute[1]==':')
    {
      minute[0]++;
      minute[1] = minute[1]-10;
      if (minute[0] == '6'){
      minutes = 0;
      minute[0] = '0';
      hour[1]++;
      if(hour[1]==':')
      {
        hour[0]++;
        hour[1] = hour[1]-10;
      }
      }
    }
  
    //minutes++;
    
    
    
      }
      //hours++;
      //lcd.clear();
  
  
}

void timeSet(int button,int cursor)
{

  if(digitalRead(button)==0)
  { 
    int a =0;
    int timeCursor = cursor;
    Serial.println("PLZ INPUT");
    lcd.setCursor(timeCursor,0);
    lcd.blink();
    
    while(a<2)
    {
      char key = customKeypad.getKey();
      
      if(key != NO_KEY)
      {
        inputNum(key,cursor);
       if(button==hourButton)
       {
          hour[a] = key;
       }
       else
       {
         minute[a] = key;
       }
        cursor++;
        a++;
        
      }
      

    }
    
    a = 0;
    lcd.noBlink();
    hour[3] = '\0';
    minute[3] = '\0';
  }

}

  
void loop()
{
  //minutes = atoi(minute);
    
   
    if(seconds<10)
  {

    lcd.setCursor(10,0);
    lcd.print("0");
    lcd.setCursor(11,0);
      lcd.print(seconds);
  } 
  else
  {
    lcd.setCursor(9,0);
    lcd.print(":");
  lcd.setCursor(10,0);
    lcd.print(seconds);
  }
  if(minutes<10)
  {
    lcd.setCursor(7,0);
    lcd.print("0");
    lcd.setCursor(8,0);
  lcd.print(minutes);
  }
  else{
    lcd.setCursor(7,0);
    lcd.print(minutes);
  }
  lcd.setCursor(4,0);
    lcd.print(atoi(hour));
  Serial.print(atoi(hour));
  Serial.print("              ");
  Serial.println(minutes);
  
  //Serial.println(minutes);
  timeSet(hourButton,hourCursor);
  timeSet(minuteButton,minuteCursor); 
  //Serial.println(atoi(minute));
  delay(100);
   
  

    //lcd.clear();
  
   //hours = atoi(hour);
  // minutes= atoi(minute);
  
  
  

}