Debounce a Button Press Connected to Interrupt Pin #2

Projects Programming
1 
/*
// these definitions does in the main file

#define UNSIGNED_LONG_MAX (4294967295)
#define DEBOUNCE 5

unsigned long TimeDiff(unsigned long start, unsigned long finish) {
  if (finish >= start) {
    return finish - start;
  } else {
    // wrapped
    return (UNSIGNED_LONG_MAX - start + finish);
  }
}

*/

volatile unsigned long lastRise;
volatile unsigned long lastFall;

void isr_2() {
  if (digitalRead(2))
    lastRise = micros();
  else
    lastFall = micros();
}

void BounceInt2Setup() { // call this in Setup
  lastRise = 0;
  lastFall = 0;
  pinMode(2, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(2), isr_2, CHANGE);
}

bool Fell() { // Call from main loop(), to check for event
  bool result = (lastFall > lastRise) && (TimeDiff(lastFall,micros()) > DEBOUNCE*1000) ;
  if (result) {
    lastRise = 0;
    lastFall = 0;
  }
  return result;
}
2

try this

volatile int Button;  // <<<<<<<<<<<<<<<<<<<<<<<<<< note the volatile before the declaration
                                   // this forces the microprocessor to reload this variable each time it is used to make sure it is up to date
void isr_2() 
{
  unsigned long cTime;
  static unsigned long EdgeTime;
  unsigned long debounceTime = 10000; // adjust to meet your needs this is a guess
  cTime = micros();
  if ((cTime - EdgeTime) >= debounceTime ) {
    EdgeTime = cTime;
    Button++;
  }
}

Z