#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);

int LED[]={32,25};
int key[]={4,5,15};
int sp=33;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(sp, OUTPUT);
  for(int i=0;i<3;i++)
  {
   pinMode(key[i], INPUT_PULLUP);
  }
  for(int i=0;i<2;i++)
  {
    pinMode(LED[i], OUTPUT);
    digitalWrite(LED[i], LOW);
  }
}

void loop() 
{
  lcd.init();//lcd初始化
  lcd.backlight();//lcd背景灯亮
  key_led();
  
}

void key_led()
{
  //左转
  if(digitalRead(key[0])==LOW)
  {
    /*delay(10);
    while(digitalRead(key[0])==LOW);
    delay(10);*/
    lcd.setCursor(0,0);
    lcd.print("L");
    digitalWrite(LED[0], HIGH);
    delay(500);
    digitalWrite(LED[0], LOW);
    delay(500);
  }

  //右转
  if(digitalRead(key[1])==LOW)
  {
    /*delay(10);
    while(digitalRead(key[1])==LOW);
    delay(10);*/
    lcd.setCursor(0,0);
    lcd.print("R");
    digitalWrite(LED[1], HIGH);
    delay(500);
    digitalWrite(LED[1], LOW);
    delay(500);
    
  }

  //双闪
  if(digitalRead(key[2])==LOW)
  {
    /*delay(10);
    while(digitalRead(key[2])==LOW) 
    delay(10);*/
    lcd.setCursor(0,0);
    lcd.print("W");
    for(int i=0;i<2;i++)
    {
      digitalWrite(LED[i], HIGH);
    }
    delay(500);
    for(int i=0;i<2;i++)
    {
      digitalWrite(LED[i], LOW);
    }
    delay(500);
    for(int i=0;i<10;i++)
    {
      digitalWrite(sp, HIGH);
      delayMicroseconds(261.60);
      digitalWrite(sp,LOW);
      delayMicroseconds(261.60);
    }
  }
}