//YWROBOT
//Compatible with the Arduino IDE 1.0
//Library version:1.1
#include <LiquidCrystal_I2C.h>
#include <TimeLib.h>

LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display
time_t tim=now(); time_t cyctime=now();int settime=30;
void setup()
{
  lcd.init();    
                 // initialize the lcd
  // Print a message to the LCD.
  lcd.backlight();
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(0, INPUT_PULLUP);
  pinMode(1, INPUT_PULLUP);pinMode(4, INPUT_PULLUP);pinMode(5, INPUT_PULLUP);
}
int edge1=0;
 int process=0, membit[9], count=0;
void loop()
{
  int up=digitalRead(1), down=digitalRead(0);
  int start=digitalRead(4), stop=digitalRead(5);

  //menu
  if(up==false && membit[0]==0)
  {
    count=count+1;
    lcd.print(count);
    membit[0]=1;
  }
  if(up==true)
  {
    membit[0]=0;
  }
  if(down==false && membit[1]==0)
  {
    count=count-1;
    lcd.print(count);
    membit[1]=1;
  }
  if(down==true)
  {
    membit[1]=0;
  }
  //menu
  //process
  if(count==0)
  {
    lcd.setCursor(7,0);
    lcd.print("CYCLE");
    lcd.setCursor(0,1);
    lcd.print("SET TIME:");
    lcd.setCursor(14,1);
    lcd.print(settime);
    lcd.setCursor(0,2);
    lcd.print("ELAP TIME:");
    lcd.setCursor(14,2);
    lcd.print(now()-cyctime);
    lcd.setCursor(0,3);
    if(process==true)
    {
      lcd.print("RUNNING");
    }
    else
    {
      lcd.print("STOP");
    }
    if(start==false)
      {
        process=true;
        tim=now(); 
        cyctime=now(); 
      }
    if(stop==false)
    {
      process=false;
    }
    if (process==true)
    {
      digitalWrite(8, HIGH);
      cycle(5,2,3);
    }
  
    else
    {
      digitalWrite(8, LOW);
      digitalWrite(7, LOW);
      digitalWrite(6, LOW);
    }  
  }
  
  lcd.setCursor(0,0);
  //process
  //set time
  
  if(count==2)
  {
    if(start==false && membit[2]==0)
    {
    settime=settime+1;
    membit[2]=1;
    }
    if(start==true)
    {
      membit[2]=0;
    }
    if(stop==false && membit[3]==0)
    {
    settime=settime-1;
    lcd.print(count);
    membit[3]=1;
    }
    if(stop==true)
    {
    membit[3]=0;
    }
    lcd.setCursor(0,1);
  lcd.print("     ");
  lcd.print(settime);
  lcd.print("     ");
  }
  
}

void cycle(int fwd, int pause, int rev)
{
    int total1, total2, total3;
    total1=fwd+pause;
    total2=fwd+pause+rev;
    total3=fwd+pause*2+rev;
    now()<fwd+tim?digitalWrite(6, HIGH):digitalWrite(6, LOW);
    (now()>=total1+tim && now()<total2+tim)?digitalWrite(7, HIGH):digitalWrite(7, LOW);
    now()>=total3+tim?tim=now():0;
    now()>=cyctime+settime?process=0:0;



}