How to access Attiny84 port B in Arduino IDE code?

Question

Referring to guide at High-low tech, I were able to flash ATTiny84 via UNO through Arduino IDE 1.6.7.

I loaded a simple blink LED program on IDE pin 0 (physical Attiny84 pin 13, PA0) and everything works fine for pin 0 till 7 at Port A.

But what if I want to access or blink a LED at one of the pins at Port B? Example, PB0 (physical pin 2)

The following is my current code to blink PA7

int led=7; //PA7
void setup() {
 pinMode(led, OUTPUT);
}
void loop() {
 digitalWrite(led, HIGH);
 delay(100);
 digitalWrite(led,LOW);
 delay(100);
}

Answer 1

According to the ATtiny web-page the pin/ports are numbered as below:

ATtiny44/ATtiny84

The physical pin 2 is the Arduino ATtiny core pin 10. You can also find this well documented in the pins_arduino.h file.

Cheers!

• Dennis: the picture is not what i looking for but the pins_arduino.h does help a lot

Answer 2

Refer to url link by @Mikael, this is the answer I'm looking for.

Arduino IDE & Pin Mapping 
// ATMEL ATTINY84 / ARDUINO
//
// +-\/-+
// VCC 1| |14 GND
// (D 10) PB0 2| |13 AREF (D 0)
// (D 9) PB1 3| |12 PA1 (D 1) 
// PB3 4| |11 PA2 (D 2) 
// PWM INT0 (D 8) PB2 5| |10 PA3 (D 3) 
// PWM (D 7) PA7 6| |9 PA4 (D 4) 
// PWM (D 6) PA6 7| |8 PA5 (D 5) PWM
// +----+
IDE Attiny84 Physical Pin
 0 PA0 13
 1 PA1 12
 2 PA2 11
 3 PA3 10
 4 PA4 9
 5 PA5 8
 6 PA6 7
 7 PA7 6
 8 PB2 5
 9 PB1 3
 10 PB0 2

In order to blink PB0, I would need to replace my code with int led=2; //PB0

• PimV: Should it not be: int led=10; //PB0