#include <LiquidCrystal_I2C.h>
#include<IRremote.h>
#include <string.h>
#include <stdlib.h>
#include<Wire.h>

LiquidCrystal_I2C lcd(0x27,16,2);
int Cursor = 0;   //横坐标
int Line = 0;     //纵坐标
int IRPin = 3;    //红外
String a = "";
String b = "";

void setup(){
  Serial.begin(9600);
  lcd.init();  //初始化
  lcd.backlight();
  IrReceiver.begin(IRPin);  
  pinMode(A0, INPUT);   //X
  pinMode(A1, INPUT);    //Y
}
void loop(){
  if(IrReceiver.decode()){
    translateIR();
    b=b+a;  //加数字
    lcd.clear();  //清屏
    lcd.print(b);  //显示加后数字
  }
  move();
}

void translateIR(){
  switch(IrReceiver.decodedIRData.command){
    case 104:   
      a="0";
      break;
    case 48:  
      a="1";
      break;
    case 24: 
      a="2";
      break;
    case 122:  
      a="3"; 
      break;
    case 16:  
      a="4";  
      break;
    case 56:  
      a="5";   
      break;
    case 90:  
      a="6";
      break;
    case 66:  
      a="7";
      break;
    case 74:  
      a="8";
      break;
    case 82:   
      a="9";
      break;
    case 176:   
      a="";
      b="";
     lcd.setCursor(0,1);
      delay(1000);
      break;
    case 194:   //删除
      a="";
      b=b.substring(0,b.length()-1);
      lcd.setCursor(0,1);
      delay(200);
      break;
      default:
      a="";b="";
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("other button!");   
      lcd.setCursor(0,1);
      lcd.print("button code:");
      lcd.print(IrReceiver.decodedIRData.command);
      delay(1000);
  }
  IrReceiver.resume();
}

void move() {
  int y = analogRead(A0);
  int x = analogRead(A1);
  delay(100);
  if(x<350 && Cursor<15){  
    lcd.clear();
    lcd.setCursor(Cursor+=1,Line);  //右移
    lcd.print(b);
  }
  if(x>650 && Cursor>0){
    lcd.clear();
    lcd.setCursor(Cursor-=1,Line);  //左移
    lcd.print(b);
  }
  if(y<350 && Line==0){
    lcd.clear();
    lcd.setCursor(Cursor,Line+=1);  //上移
    lcd.print(b);
  }
  if(y>650 && Line==1){
    lcd.clear();
    lcd.setCursor(Cursor,Line-=1);  //下移
    lcd.print(b);
  }
}