#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#include <Keypad.h>
LiquidCrystal_I2C lcd(0x27, A4, A5);

#define choose  8   //选择端口
#define add  6      //加
#define minus  7    //减
unsigned long seconds;
int s = 0, m = 0, h = 0, d = 0, mon = 0, y = 0;   //时间进位
int second = 0, minute = 0, hour = 0, day = 0, month = 0, year = 0;  //当前时间
int SECOND = 0, MINUTE = 0, HOUR = 0, DAY = 0, MONTH = 0, YEAR = 0;  //初始时间
int chose = 0, ButtonDelay = 10;

char keys[4][4] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};
uint8_t colPins[4] = { 8, 9, 10, 11 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[4] = { 2, 3, 4, 5 }; // Pins connected to R1, R2, R3, R4
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, 4, 4);

int a,i=0; 
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
lcd.begin (16,2);
delay(300);
lcd.setCursor(2,0);
lcd.print("CYPHER");
}

void loop() {
//char key = keypad_key.getKey();
char key = keypad.getKey();
if (key!= NO_KEY){
  a++;
  lcd.backlight();
  lcd.setCursor(2, 0);
  //lcd.print("False");
  if(a==1&key=='1'){
    i++;
    lcd.print("1Right");
  }
  else if(a==2&key=='2'){
    i++;
    lcd.print("2Right"); 
  }
  else if(a==3&key=='3'){
    i++;
    lcd.print("3Right");
  }
  else if(a==4&key=='4'){
    i++;
    lcd.print("4Right");
  }
  else if(a==5&key=='5'){
    i++;
    lcd.print("5Right");  
  }
  else if(a==6&key=='6'){
    i++;
    lcd.print("6Right");  
  }
  else if(a==7&i==6){
    lcd.backlight();
    lcd.setCursor(2, 0);
    lcd.clear();
    lcd.print("Ture");
    delay(3000);
    lcd.setCursor(2,0);
    lcd.clear();
    lcd.print("Hello World!!!");
    a=0;
    i=0;
    lcd.noBacklight();
  }
  else{
    i=0;
  }
  if(a>=7&i!=6){
    a=0;
    i=0;
    lcd.clear();
    lcd.print("Rong");
    lcd.clear();
    lcd.print("Re input!");
    delay(3000);
    lcd.clear();
  //  lcd.noBacklight();
    }
  

}

}
void setup(){    
    for(int i = 2;i <= 13; i++){
       pinMode(i,OUTPUT);  
    }          
    digitalWrite(add, HIGH);
    digitalWrite(minus, HIGH);
    digitalWrite(choose, HIGH);  
    lcd.begin(16, 2);  //初始化LCD1602 
    set(2023, 1, 30, 14, 49, 50);
}
 
/** 格式化输出  */
void FormatDisplay(int col, int row,int num){   
    lcd.setCursor(col, row); 
    if(num < 10){
        lcd.print("0");
    }   
    lcd.print(num);   
}
 
/** 计算时间 */
void time(){   
    second = (SECOND + seconds) % 60;   //计算秒
    m = (SECOND + seconds) / 60;        //分钟进位
    FormatDisplay(6,1,second);
 
    minute = (MINUTE + m) % 60;  //计算分钟
    h = (MINUTE + m) / 60;       //小时进位
    FormatDisplay(3,1,minute);      
 
    hour = (HOUR + h) % 24;   //计算小时
    d = (HOUR + h) / 24;      //天数进位
    FormatDisplay(0,1,hour); 
 
    lcd.setCursor(2, 1);   lcd.print(":");   
    lcd.setCursor(5, 1);   lcd.print(":");  
}
 
/** 根据年月计算当月天数 */
int Days(int year, int month){   
    int days = 0;
    if(month != 2){     
        switch(month){       
            case 1: case 3: case 5: case 7: case 8: case 10: case 12: days = 31;  break;
            case 4: case 6: case 9: case 11:  days = 30;  break;
        }
    } 
    else{   //闰年    
        if(year % 4 == 0 && year % 100 != 0 || year % 400 == 0){
            days = 29;
        }   
        else{
            days = 28;   
        }     
    }  
    return days;   
}
 
/** 计算当月天数 */
void Day(){      
    int days = Days(year,month);
    int days_up;
    if(month == 1){
        days_up = Days( year - 1, 12 );
    } else{
        days_up = Days( year, month - 1 );
    }  
 
    day = (DAY + d) % days;
    if(day == 0){
        day = days;    
    }   
    if((DAY + d) == days + 1){   
        DAY -= days;
        mon++;
    }
    if((DAY + d) == 0){
        DAY += days_up;
        mon--;
    }
    FormatDisplay(8,0,day); 
}
 
/** 计算月份 */
void Month(){   
    month = ( MONTH + mon ) % 12;
    if(month == 0){
        month = 12;
    }  
    y = (MONTH + mon - 1) / 12;
    FormatDisplay(5,0,month); 
    lcd.setCursor(7, 0);   
    lcd.print('-'); 
}
 
/** 计算年份 */
void Year(){     
    year = (YEAR + y) % 9999;
    if(year == 0){
        year = 9999;
    } 
    lcd.setCursor(0, 0); 
    if(year < 1000){ 
        lcd.print("0"); 
    }
    if(year < 100){ 
        lcd.print("0"); 
    }
    if(year < 10) { 
        lcd.print("0"); 
    }
    lcd.print(year);
    lcd.setCursor(4, 0);   
    lcd.print('-'); 
}
 
/** 根据年月日计算星期几 */
void Week(int y,int m, int d){        
    if(m == 1) m = 13;
    if(m == 2) m = 14;
    int week = (d+2*m+3*(m+1)/5+y+y/4-y/100+y/400)%7+1; 
    String weekstr = "";
    switch(week){     
        case 1: weekstr = "Mon. ";   break;
        case 2: weekstr = "Tues. ";  break;
        case 3: weekstr = "Wed. ";   break;
        case 4: weekstr = "Thur. ";  break;
        case 5: weekstr = "Fri. ";   break;
        case 6: weekstr = "Sat. ";   break;
        case 7: weekstr = "Sun. ";   break;
    }    
    lcd.setCursor(11, 0);  lcd.print(weekstr);
}
 
/** 显示时间、日期、星期  */
void Display(){  
   time();
   Day();  
   Month();
   Year();
   Week(year,month,day);  
}