AVR Lab 3-1

gistfile1.c

#include <avr/io.h>
#define F_CPU 1600000UL
#include <util/delay.h>

#define PORT_LED PORTB
#define DIR_LED DDRB
#define LED1 1
#define LED2 2
#define BTN 0

void delay_ms(unsigned int time){
  while(time-- > 0){
		_delay_ms(100.0);
	}
}

int main(void){
	DIR_LED |= (1<<LED1);
	DIR_LED |= (1<<LED2);

	// Internal Pull up
	PORTB |= (1<<BTN);

	int state = 0;
	int l1, l2;

	int sw;
	while(1){

		sw = ( PINB & (1<<BTN) );
		sw ^= (1<<BTN);

		if(sw){
			if(state == 0)
				state = 1;
			else if(state == 1)
				state = 3;
			else if(state == 3)
				state = 2;
			else if(state == 2)
				state = 0;

			l1 = state & 1;
			l2 = state & 2;

			if(l1)
				PORTB |= (1 << LED1);
			else
				PORTB &= ~(1 << LED1);

			if(l2)
				PORTB |= (1 << LED2);
			else
				PORTB &= ~(1 << LED2);
		}

		delay_ms(10);
		

		/*PORT_LED &= ~(1<<LED);
		delay_ms(200);

		PORT_LED |= (1<<LED);
		delay_ms(200);*/
	}
	return 0;
}