Merge https://git.omegav.no/avrkurs/attinykurs

/*

 * PWM-LF.c

 *

 * Created: 29.01.2017 23:43:39

 * Author : Petter

 */ 

#define F_CPU 3333333UL

#define SW2 6 // Port A

#define SW3 7 // Port A

/*

    In this exercise, you will use PWM to control thwe brightness of LEDs

    Once we have PWM set up, controling the brightness is super easy!

*/

int main(void)

{