void setup() contains the following code to setup the interrupts.
//Endable Interrupts for PCIE2 Arduino Pins (D0-7) PCICR |= (1<<PCIE2); //Setup pins 2,3,4,5 PCMSK2 |= (1<<PCINT18); PCMSK2 |= (1<<PCINT19); PCMSK2 |= (1<<PCINT20); PCMSK2 |= (1<<PCINT21); //Trigger Interrupt on rising edge MCUCR = (1<<ISC01) | (1<<ISC01);
And now, the ISR( PCINT2_vect ) function is triggered on every interrupt. That works like a charm. My question is, what is the best/fastest way to find out, which pin was triggered?
I found something in Re: Is better to use ISR(PCINT2_vect) or attachInterrupt on pins 2, 3?, but I do not understand the code and it does not work out of the box. But it looks impressive...
What is the solution?
At the moment, I am reading the pin state from the from the input pin register:
if (PIND & 0b00000100) Serial.println( "PIN 2" ); if (PIND & 0b00001000) Serial.println( "PIN 3" ); if (PIND & 0b00010000) Serial.println( "PIN 4" ); if (PIND & 0b00100000) Serial.println( "PIN 5" );
In the end, I want to count the interrupts on the pins. But how can I assure, that there are no counted twice?