gistfile1.txt

#define PIN 3

void setup() {
  Serial.begin(115200);
}

void loop() {
  long last = 0;
  boolean last_value = -1;
  while(1) {
    boolean value = digitalRead(PIN);
    if(value != last_value) {
      long now = micros();
      Serial.print(value);
      Serial.print(" ");
      Serial.println(now - last);
      last = now;
      last_value = value;
    }
  }
}