How to add Pin Change Interrupts

[Xychic]

I am trying to attach a pin change interrupt to pin D2 of an Arduino Nano.

From reading the code I think I need a function called PCINT0, and need to call avr_device::interrupt::enable(); and from reading the data sheet for the ATmega328P I believe I need to set bit 0 of the PCICR to 1 and bit 2 of PCMSK2 to 1 however I can't figure out how to control those registers.

My interrupt function is below

#[avr_device::interrupt(atmega328p)]
fn PCINT0() {
    PCINT0_STORE.store(true, atomic::Ordering::SeqCst);
}

[Xychic]

After spending the last 2 hours going through docs again I have it working.

The bit of code needed to control the registers is

peripherals.EXINT.pcicr.write(|w| unsafe { w.bits(0b100) });
peripherals.EXINT.pcmsk2.write(|w| unsafe { w.bits(0b100) });

and as pin D2 is in PCIE2 the interrupt function should be called PCINT2