Confusion about none working Interrupt 2 on a ATMega644P/1284P

[Nishant_Sood]

Hi Steve,

By core I meant the Arduino "core" code ... I'm using maniacbug's mighty-1284p core.

Anyway the following sketch works fine for INT0, 1 or 2. I'm just using a 1Hz square wave from an RTC as the signal to the interrupt pin, and toggling an LED.

const uint8_t ledPin = 7;

void setup(void)
{
    pinMode(ledPin, OUTPUT);
    attachInterrupt(2, intHandler, FALLING);
}

void intHandler(void)
{
    static bool ledState;
    
    digitalWrite(ledPin, ledState = !ledState);
}

void loop(void)
{
}

Hi Jack ,im using maniacbug's mighty-1284p core but none of my interrupts work if I use the attachInterrupt method however, configuring the interrupts directly from the registers and get rid of Winterrupts.c works them!(however creating unexpected uC behaviour!) , how to make interrupts work normlly?

EDIT
im compiling it as 'Original Mighty 1284p 8MHz' bcz I have a INTROSC based system!