GPIO tut 1

/*
 * tutorial_1.c
 *
 * Created: 2016/08/15 12:04:52 PM
 *  Author: Kai von Fritschen   214200809

 In this prac, we must use 3 digital inputs in order to generate 8 different states. 5 LED's are connected to the digital outputs and must light up according to the different states on the inputs. I used the internal pull up resistors on inputs 0,1 and 2 on PORT D
 */


#include <avr/io.h>
#define F_CPU 16000000UL
#include <util/delay.h>




void outputs_off (void);        // function prototype
void outputs_on (void);         // function prototype
void sequence1 (void);          // function prototype
void sequence2 (void);          // function prototype

int main(void)
{
    DDRB = 0xff;        // PORT B is configured to be outputs
    DDRD = 0x00;        // PORT D is configured to be inputs
    PORTD = 0x07;       // PORT D is configured to use ALL input's pullup resistors in PORT D (floating input means input is HIGH)

    while(1)
    {

     if (PIND == 0x00){     // if digital pin 0,1,2 are all low
        outputs_off();  // calls function to turn off all outputs
        }
            else if (PIND == 0x07){     // if DI pins 0,1,2 are all HIGH
                    sequence2();        // calls function to run sequence 2

                    }
                else if  (PIND == 0x03){    // if DI pins 0 and 1 are HIGH
                        sequence1();            // calls function to run sequence 1

                        }
                    else if ((PIND == 0x01) || ( PIND == 0x02) ||( PIND == 0x04) || (PIND == 0x05) || (PIND == 0x06))    // if any other states are met on the DI pins 0,1,2
                            {   outputs_on();       // turn all outputs HIGH
                            }

}
}
void outputs_off (){
    PORTB= 0x00;            // turns all outputs off
    }

void outputs_on (){
    PORTB= 0x3E;            // turn digital pins 13,12,10,9 and 8 HIGH
    }
void sequence1 (){
    PORTB= 0x2A;            // turn digital pins 13, 11 and 9 HIGH
    _delay_ms(2000);
    PORTB= PORTB>>1;        // shift bits to the left by one, making pins 11 and 10 HIGH
    _delay_ms(2000);
    }
void sequence2 (){
    PORTB= 0x02;            // sets pin 9 high
    _delay_ms(1000);
    PORTB = PORTB<<2;       // shifts bit by two (to the left), making only pin 11 high
    _delay_ms(1000);
    PORTB= PORTB<<2;        // shifts bit by two (to the left), making only pin 13 high
    _delay_ms(1000);
    PORTB = PORTB>>1;       // shifts bit by one (to the right), making only pin 12 high
    PORTB |= (1<<2);        // sets bit 2 high instantly after previous command, making pin 10 high
    _delay_ms(1000);
    }