Arduino入門：外部割り込み

//Arduino Sketch Example: attachInterrupt, syntax
//Date: 2015.1.18
//Edited and Modified by: easy labo
//Original Source: Arduino Reference (http://arduino.cc/en/Reference/HomePage)

//Syntax
attachInterrupt(interrupt, ISR, mode)
attachInterrupt(pin, ISR, mode)   //(Arduino Due only)

//Parameters
/*
interrupt:	the number of the interrupt (int)
pin:	the pin number	(Arduino Due only)
ISR:	the ISR to call when the interrupt occurs; this function must take no parameters and return nothing. This function is sometimes referred to as an interrupt service routine.
mode:	
defines when the interrupt should be triggered. Four contstants are predefined as valid values:
LOW to trigger the interrupt whenever the pin is low,
CHANGE to trigger the interrupt whenever the pin changes value
RISING to trigger when the pin goes from low to high,
FALLING for when the pin goes from high to low.
The Due board allows also:
HIGH to trigger the interrupt whenever the pin is high.
(Arduino Due only)
*/

//Returns
//none

//Arduino Sketch Example: attachInterrupt, example
//Date: 2015.1.18
//Edited and Modified by: easy labo
//Original Source: Arduino Reference (http://arduino.cc/en/Reference/HomePage)

//Example

int pin = 13;
volatile int state = LOW;

void setup()
{
  pinMode(pin, OUTPUT);
  attachInterrupt(0, blink, CHANGE);
}

void loop()
{
  digitalWrite(pin, state);
}

void blink()
{
  state = !state;
}

//Arduino Sketch Example: detachInterrupt
//Date: 2015.1.18
//Edited and Modified by: easy labo
//Original Source: Arduino Reference (http://arduino.cc/en/Reference/HomePage)

//Syntax
detachInterrupt(interrupt)
detachInterrupt(pin)   //(Arduino Due only)

//Parameters
//interrupt: the number of the interrupt to disable (see //attachInterrupt() for more details).
//pin: the pin number of the interrupt to disable (Arduino Due only)

//Description
//Turns off the given interrupt.