Hello
I Wanted to make a Arduino countdown using LCD and IR receiver, 1 minute countdown begins when i press 1 on IR Remote, and if i want the countdown to stop I made a External interrupt with a button to make LCD clear when pressed, but LCD wont be cleared when i press button but LCD clear happens when countdown ends, can someone help me with this.
Thankyou in Advance 
//The code
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <IRremote.h>
volatile bool clsRequested = false;
int receiver_pin = 9;
float i;
int button = 2;
// Set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x20, 16, 2);
IRrecv receiver(receiver_pin);
decode_results output;
#define code1 41565
#define clear0 39015 // to clear lcd
#define codeok 14535
unsigned int value;
void setup()
{
// initialize the LCD
lcd.begin();
Serial.begin(9600);
receiver.enableIRIn();
lcd.print("Hello");
pinMode(2, INPUT_PULLUP);
attachInterrupt (digitalPinToInterrupt (button), lcdclear, FALLING);
}
void loop()
{
if (clsRequested == true)
{
lcd.clear();
clsRequested = false;
}
if (receiver.decode(&output)) {
value = output.value;
switch (value) {
case clear0:// clear lcd
lcd.clear();
break;
case code1:// prints 1 minute
lcd.clear();
oneminute();
break;
}
Serial.println(value);
receiver.resume();
}
}
int oneminute() { //1 minute function
for (i = 0.60; i > 0.00; i -= 0.01) { //reduces 0.01 from 0.60
lcd.setCursor(0, 0);
lcd.print(i);
i -= 0.01;
delay(1000);
}
}
void lcdclear() {
clsRequested = true;
}