Which Attiny84 pins are interrupt pins

Hi,

First of all, I suppose that you have set up the IDE to use it to build code for ATtiny84, if not, check:

Setting up Arduino IDE for ATtiny's| OpenEnergyMonitor

In the pins_arduino.c file you will find how pins are numbered, in that case:

// ATMEL ATTINY84 / ARDUINO

//

//                                     +-\/-+

//                           VCC 1|      |14 GND

//                   (D 0) PB0 2|      |13 AREF (D10)

//                   (D 1) PB1 3|      |12 PA1 (D9) 

//                            PB3 4|      |11 PA2 (D 8) 

// PWM INT0 (D 2) PB2 5|      |10 PA3 (D 7) 

//          PWM (D 3) PA7 6|      |9 PA4(D 6) 

//          PWM (D 4) PA6 7|      |8 PA5(D 5) PWM

//                                      +----+

Pins with PCint capability are whole portA, and portB from pin0 to pin3.

Check also PinChangeInterrupt-0001.zip library to know how it works.

Hope it helps, regards,

Miguel

OK, thanks. Do I understand it correctly that if I want to use physical pins 11 and 12 I should use 1 and 2 as logical pin numbers?

No, in example, to have a '1' on physical pin 11 digitalWrite(8,HIGH), to have a '0' on physical pin 12 digitalWrite(9, LOW). You fist must configure pin mode.

But check how work interruptions libraries and classes.

Regards,

Miguel

I believe I should use pins 8 and 9 if I want to simply write to them. But my problem is that I want to use those pins as interrupt pins. I thought interrupt pin numbers are different from digital or analog pin numbers? From this pinout below I thought I should be using PCINT1 and PCINT2, i.e. pins 1 and 2 as interrupt pins. But it does not work. I used this video as an example Tutorial 10 for Arduino: Interrupts and Hardware Debouncing - YouTube (see from minute 11). It is about Arduino Uno, but I need to do the same on Attiny84 using two interrupt pins.

That's how it works for the arduino, you are rigth, but notice that he is using attachedInterrupt funtion.

You can use the attachedInterrupt funtion included in the WInterrupts.c library, like this.

Or you can use the libraries in PinChangeInterrupt-0001.zip:

Downloads - arduino-tiny - ATtiny core for Arduino - Google Project Hosting

Where the function is attachedPCInterrupt, and the first parameter in this function is the pin number, so it depends on what you are using.

What are you using? If you were using WInterrupts.c, try PinChangeInterrupt library and its function.

I am sorry for not being more helpfull, but I don't have an Attiny84 to check it by myself...

Miguel

Thanks gihu. I think I realize now that I am confusing External interrupts with Pin Change interrupts.I am trying to use attachinterrupt function as per video tutorial I mentioned and it looks like it only works with External interrrupts (i.e.pin 5 on Attiny84). Working with attachinterrupt function does not require any additional libraries. Will have to figure out now how to program Pin Change interrupts.