#include <LiquidCrystal.h>

LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
#define pulse_ip A1
int ontime, offtime, duty;
float freq, period;

void setup()
{
  pinMode(pulse_ip, INPUT);
  lcd.begin(16, 2);
  lcd.clear();
}
void loop()
{
  lcd.setCursor(0, 0);
  lcd.print("Freq:");
  lcd.setCursor(0, 1);
  lcd.print("Duty:");
  ontime = pulseIn(pulse_ip, HIGH);
  offtime = pulseIn(pulse_ip, LOW);
  period = ontime + offtime;
  freq = 1000000.0 / period;
  duty = (ontime / period) * 100;
  lcd.setCursor(6, 0);
  lcd.print(freq);
  lcd.print("Hz");
  lcd.setCursor(6, 1);
  lcd.print(duty);
  lcd.print('%');
  delay(1000);
  lcd.clear();
}