Skip to content

Instantly share code, notes, and snippets.

@dgt0011

dgt0011/gist:2aa7eaa698f3942abd02d6104d8ef013

Created July 4, 2017 03:13
Show Gist options
  • Save dgt0011/2aa7eaa698f3942abd02d6104d8ef013 to your computer and use it in GitHub Desktop.
Save dgt0011/2aa7eaa698f3942abd02d6104d8ef013 to your computer and use it in GitHub Desktop.
Download ZIP
ATMega328 setup INT0 and INT1 for hardware interrupt on falling edge
Raw
gistfile1.txt
//setup INT0 and INT1 for hw int.
DDRD &= ~(1 << DDD2); // Clear the PD2&PD3 pin & enable PD2 & PD3 as input
DDRD &= ~(1 << DDD3);
PORTD |= (1 << PORTD2) | (1 << PORTD3);
//trigger INT0, INT1 on falling edge
EICRA |= (1 << ISC11) | (1<< ISC01);
EIMSK |= (1 << INT0) | (1 << INT1);
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment