Blink LED on ATtiny13A when switch is pressed. tinkeringetc.blogspot.com

blink-ATtiny13a.c

#include <avr/io.h>
#include <util/delay.h>

#define SWITCH PB0 // pin 5

int main(void)
{
  DDRB = 1<<4; // port B3, ATtiny13a pin 2
  PORTB = 1<<SWITCH; // port b0, switch input

	while (1)
	{
		if ((PINB & (1 << SWITCH))) { // switch pressed

			for (int n=0; n<4; n++){ // blink 4 times

				// port B3, ATtiny13a pin 2
				PORTB = 1<<4; // LED on
				_delay_ms(500);
				PORTB = 0X0; // LED off
				_delay_ms(250);
			}
		}
		else {
			// nothing!
		}
	}
}