// includes the library code:
#include <LiquidCrystal.h>

// initializes the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 7, 4, 3, 2);

// LED connected to digital pin 5
const int ledPin1 = 9;

// pot1 connected to analog pin 1
const int analogPin1 = A0;
const int analogPin2 = A1;
const int analogPin3 = A2;

// variable to store pot1 data
int val1 = 0;
int val2 = 0;
int val3 = 0;
int dtyc=0;
int freq=490;//default

void setup() {
  Serial.begin(9600);
  // set up the LCD's number of columns and rows:
  lcd.begin(20, 4);
  // sets pin 5 as output
  pinMode(ledPin1, OUTPUT);
  lcd.setCursor(0,3);
  lcd.print("ON Time: ");
  lcd.setCursor(0,1);
  lcd.print("Duty Cycle: ");
  lcd.setCursor(0,2);
  lcd.print("Resolution: ");
  lcd.setCursor(0,0);
  lcd.print("Frequency : ");
}

void loop() {
  //ON Time------------------------------------------
  if((val1)<10){
    lcd.setCursor(9,3);
    lcd.print(val1);
    lcd.setCursor(10,3);
    lcd.print("  ");
  }
  else if((val1)>10 && (val1)<100){
    lcd.setCursor(9,3);
    lcd.print(val1);
    lcd.setCursor(11,3);
    lcd.print(" ");
  }
  else if((val1)>100 && (val1)<1000){
    lcd.setCursor(9,3);
    lcd.print(val1);
    lcd.setCursor(12,3);
    lcd.print(" ");
  }
  else{
    lcd.setCursor(9,3);
    lcd.print(val1);
  }
  Serial.println(int(val1/4));
  val1 = analogRead(analogPin1);
  val2 = analogRead(analogPin2);
  val3 = analogRead(analogPin3);
  analogWrite(ledPin1, val1/4);
  freq=map(val2,0,1023,30,31372);
  //frequency------------------------------------------
  if(freq<100){
    lcd.setCursor(12,0);
    lcd.print(freq);
    lcd.setCursor(14,0);
    lcd.print(" Hz   ");
  }
  else if(freq>100 && freq<1000){
    lcd.setCursor(12,0);
    lcd.print(freq);
    lcd.setCursor(15,0);
    lcd.print(" Hz  ");
  }
  else if(freq>1000 && freq<10000){
    lcd.setCursor(12,0);
    lcd.print(freq);
    lcd.setCursor(16,0);
    lcd.print(" Hz ");
  }
  else{
    lcd.setCursor(12,0);
    lcd.print(freq);
    lcd.setCursor(17,0);
    lcd.print(" Hz");
  }
  //duty cycle-----------------------------------------
  dtyc=val1*.098;
  lcd.setCursor(12,1);
  lcd.print(dtyc);
  if(dtyc<10){
    lcd.setCursor(12,1);
    lcd.print(dtyc);
    lcd.setCursor(13,1);
    lcd.print("%   ");
  }
  else if(dtyc<100 && dtyc>10){
    lcd.setCursor(12,1);
    lcd.print(dtyc);
    lcd.setCursor(14,1);
    lcd.print("%   ");
  }
  else if(dtyc==100){
    lcd.setCursor(12,1);
    lcd.print(dtyc);
    lcd.setCursor(15,1);
    lcd.print("%  ");
  }
}