/* example interrupt pulse counter
*/
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4);
int enable = 27;
int pulse = 0;
int red = 4;
int green = 2;
void count()
{
pulse++;
}
void setup()
{
lcd.init(); // initialize the lcd
lcd.backlight();
pinMode(red, OUTPUT);
pinMode(green, OUTPUT);
Serial.begin(112500);
pinMode(14, INPUT_PULLUP);
pinMode(27, INPUT_PULLUP);
attachInterrupt(14, count, FALLING);
}
void loop()
{
if (digitalRead(enable) != 0)
{
digitalWrite(green, HIGH);
digitalWrite(red, LOW);
interrupts();
Serial.print("Pulses:");
Serial.println(pulse);
lcd.setCursor(2,0);
lcd.print("Pulse: ");
lcd.setCursor(2,1);
lcd.print(pulse);
delay(10);
}
if (digitalRead(enable) == 0)
{
//noInterrupts();
digitalWrite(green, LOW);
digitalWrite(red, HIGH);
delay(10);
pulse = 0;
delay(100);
lcd.clear();
}
}