Miscellany
public c v1 · immutableSIGNAL(SIG_INTERRUPT0){ if ((PINA & (1<<PA0))==0) { PORTD ^=(1<<PD6); } else { PORTD ^=(1<<PD6); } if ((PINA & (1<<PA1))==0) { PORTD ^=(1<<PD5); } else{ PORTD ^=(1<<PD5); }}