#ARDUINO MEGA 2560 PIN INTERRUPT PINS HOW TO#

Second argument is function name to which you want to call upon every interrupt. one is a pin number to which pin you want to use for external interrupt triggering. This function takes two arguments as a input. Attach interrupt function is used for this purpose.

#ARDUINO MEGA 2560 PIN INTERRUPT PINS HOW TO#

Now lets see how to use Arduino interrupts functions already available in Arduino IDE to initialize Arduino interrupts and with which pin of Arduino you want to initialize it. pin number 2 than ISR is the function which is going to be call and mode tells that whenever the interrupts is been triggered. Pay attention when you have to choose a pin for an interrupt.

The syntax which are going to be attach interrupt and specify the pin e.g. As previously stated, on Arduino Uno you can only use pin 2 and 3 for interrupts. External Interrupts: 2 (interrupt 0), 3 (interrupt 1), 18.

High: High is a continuous trigger whenever the signal is high in other words the signal is on 5v. Pins 0 and 1 are also connected to the corresponding pins of the ATmega8U2 USB-to-TTL Serial chip.

Low: Low is a continuous trigger whenever the signal is low in other words the signal is on 0v.

Id like to add PE6 and PE7 to the pin configuration file to use as an interrupt.

Ive wired PE6 and PE7 and interrupts however, since these two pins where never wired on an Arduino board, the pins where never configured in the file.

Falling: On a falling edge the signal going from high to low means signal is triggering from 5v to 0v. I am using an ATmega2560 on a custom PCB.

Rising: On a rising edge the signal going from low to high means signal triggering from 0v to 5v.

Change: When signal change even if signal rise or signal fall or if the signal is in low state at 0 or if the signal is in high state trigger 5v.

Arduino mega 2560 pin interrupt pins