#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
int X;
int Y;
float Time;
float frequency;
const int Freqinput = A0;
const int oscInput = A1;
int Switch = A2;
const int test = 9;
void setup()
{
Serial.begin(9600);
lcd.begin(16,2);
pinMode(Switch,INPUT);
pinMode(Freqinput,INPUT);
pinMode(oscInput,INPUT);
pinMode(test, OUTPUT);
analogWrite(test,127);
lcd.setCursor(0,0);
lcd.print("Press the button");

}
void loop()
{
if(digitalRead(Switch)==HIGH)
{
lcd.clear();
lcd.setCursor(0,0);
X = pulseIn(Freqinput,HIGH);
Y = pulseIn(Freqinput,LOW);
Time = X+Y;
frequency = 1000000/Time;
if(frequency<=0)
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print("F=");
lcd.print("0.00 Hz");
lcd.setCursor(0,1);
lcd.print("T=");
lcd.print("0.00 us");
}
else
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print("F=");
lcd.print(frequency);
lcd.print("Hz");
lcd.setCursor(0,1);
lcd.print("T=");
lcd.print(Time);
lcd.print(" us");
delay(500);
}
}
else
{
Serial.println(analogRead(oscInput));
}
}