can 2 interupt put in same pin?

Projects General Guidance
1

hi, sorry for my bad english,
i test this code from internet

const byte interruptPin = 19;
volatile byte state = LOW;
 
void setup() {
   pinMode(LED_BUILTIN, OUTPUT);
   pinMode(interruptPin, INPUT_PULLUP);
   attachInterrupt(digitalPinToInterrupt(interruptPin), blink, CHANGE);
}
 
void loop() {
   digitalWrite(LED_BUILTIN, state);
}
 
void blink() {
   state = !state;
}

after test it, it seems interesting, i study it, and edit it to become like this:

const byte interruptPin = 19;
volatile byte state = LOW;

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(interruptPin, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(interruptPin),blinkOn, RISING);
  attachInterrupt(digitalPinToInterrupt(interruptPin),blinkOff, FALLING);
}

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

void blinkOn() {
state = HIGH;
} 

void blinkOff(){
state = LOW;
}

when the arduino turned on, the build-in led is on,
then when first contact, the build-in is turned off,
but when i put the contact, the build-in is not back to on,
it seems 2 interrupt cant be place in same pin, or my code is wrong,
i will appeciate any guide , thanks

2

it seems 2 interrupt cant be place in same pin

That is true.

If you want both the RISING edge and the FALLING edge to trigger different functions, use CHANGE and ONE interrupt handler. In the interrupt handler, determine the current state of the pin. If it is now HIGH, the rising edge triggered the interrupt handler. If it is now LOW, the falling edge triggered the interrupt handler. Take the appropriate action.

3

PaulS:
That is true.

If you want both the RISING edge and the FALLING edge to trigger different functions, use CHANGE and ONE interrupt handler. In the interrupt handler, determine the current state of the pin. If it is now HIGH, the rising edge triggered the interrupt handler. If it is now LOW, the falling edge triggered the interrupt handler. Take the appropriate action.

ah thank a lot, it nice if my guess is right