#include <TimerOne.h>
#include <Wire.h>
#include <RTClib.h>
RTC_DS1307 RTC;

bool Buzzer = 0; //蜂鸣器
uint8_t Light, Light_Low = 50; //光照值
uint8_t key, time; //键码，时间

uint8_t KeyNum(void);//按键检测

void setup() {
  // put your setup code here, to run once:
  OLED_Init(); //OLED屏幕配置
  Timer1.initialize(1000000);//1秒定时
  Timer1.attachInterrupt(Timer1_Fun);
  Wire.begin();//DS1307相关配置
  RTC.begin();
  RTC.adjust(DateTime(__DATE__, __TIME__));
  pinMode(4, INPUT);  //红外感应模块
  pinMode(5, OUTPUT); //蜂鸣器
  pinMode(6, INPUT);  //3个按键
  pinMode(7, INPUT);
  pinMode(8, INPUT); pinMode(9, OUTPUT); //LED灯
  digitalWrite(9, HIGH);//默认熄灯
  OLED_ShowString(1, 1, "    -  -");
  OLED_ShowString(2, 1, "  :  :");
  OLED_ShowString(3, 1, "People:");
  OLED_ShowString(4, 1, "Light:   %");
}

void loop() {
  // put your main code here, to run repeatedly:
  /* 获取当前时间 */
  DateTime now = RTC.now();
  OLED_ShowNum(1, 1, now.year(), 4);
  OLED_ShowNum(1, 6, now.month(), 2);
  OLED_ShowNum(1, 9, now.day(), 2);
  OLED_ShowNum(2, 1, now.hour(), 2);
  OLED_ShowNum(2, 4, now.minute(), 2);
  OLED_ShowNum(2, 7, now.second(), 2);
  /* 检测是否有人 */
  if (digitalRead(4))
  {
    OLED_ShowString(3, 8, "Yes");
    if (Light < Light_Low)
    { time = 10;
      digitalWrite(9, LOW);
    }
  }
  else
    OLED_ShowString(3, 8, "No ");
  /* 测量光照 */
  Light = 100 - (float)analogRead(A0) / 1010 * 100;
  OLED_ShowNum(4, 7, Light, 3);
  /* 按键进入设置 */
  key = KeyNum();
  if (key == 1)
  {
    OLED_Clear();
    OLED_ShowString(1, 1, "    Setting");
    OLED_ShowString(3, 1, "Light:   %");
    while (1)
    {
      OLED_ShowNum(3, 7, Light_Low, 3);
      key = KeyNum();
      if (key == 1) //按键1退出
      {
        OLED_Clear();
        OLED_ShowString(1, 1, "    -  -"); OLED_ShowString(2, 1, "  :  :");
        OLED_ShowString(3, 1, "People:");
        OLED_ShowString(4, 1, "Light:   %");
        break;
      }
      else if (key == 2) //按键2阈值加
        Light_Low++;
      else if (key == 3) //按键3阈值减
        Light_Low--;
    }
  }
  delay(1);
  /* 蜂鸣器控制 */
  if (digitalRead(4))
    Buzzer = !Buzzer;
  digitalWrite(5, Buzzer);
}

void Timer1_Fun(void)
{
  if (time > 0)
    time--;
  if (time == 0)
    digitalWrite(9, HIGH);
} uint8_t KeyNum(void)
{
  uint8_t keynum = 0;
  if (digitalRead(6))
  {
    delay(20);
    while (digitalRead(6));
    delay(20);
    keynum = 1;
  }
  else if (digitalRead(7))
  {
    delay(20);
    while (digitalRead(7));
    delay(20);
    keynum = 2;
  }
  if (digitalRead(8))
  {
    delay(20);
    while (digitalRead(8));
    delay(20);
    keynum = 3;
  }
  return keynum;
}