main.c

/*

 * christmas_lights3.c

 *

 * Created: 12.12.2020 20:52:29

 * Author : joachim

 */ 

#include <avr/io.h>

#include<util/delay.h>

#define TIME0 1

#define TIME1 3

#define TIME2 15

#define LOOPTIME 7

#define WAITTIME 500

#define LED_COUNT 20

#define DDR_BYTE 0

#define PORT_BYTE 1

uint8_t l;

// Achtung! Hoer andere Reihenfolge als bei Christmas-Lights!

uint8_t matrix[LED_COUNT][2] = {

  //  DDR_BYTE   PORT_BYTE

  //     ABCD        ABCD

  { 0b00000011, 0b00000001 }, // AB  0

  { 0b00000011, 0b00000010 }, // BA  1

  { 0b00000110, 0b00000010 }, // BC  2

  { 0b00000110, 0b00000100 }, // CB  3

  { 0b00000101, 0b00000001 }, // AC  4

  { 0b00000101, 0b00000100 }, // CA  5

  { 0b00001001, 0b00000001 }, // AD  6

  { 0b00001001, 0b00001000 }, // DA  7

  { 0b00001010, 0b00000010 }, // BD  8

  { 0b00001010, 0b00001000 }, // DB  9

  { 0b00001100, 0b00000100 }, // CD 10

  { 0b00001100, 0b00001000 },  // DC 11

  { 0b00010001, 0b00000001 },  // AE 12

  { 0b00010001, 0b00010000 },  // EA 13

  { 0b00010010, 0b00000010 },  // BE 14

  { 0b00010010, 0b00010000 },  // EB 15

  { 0b00010100, 0b00000100 },  // CE 16

  { 0b00010100, 0b00010000 },  // EC 17

  { 0b00011000, 0b00001000 },  // DE 18

  { 0b00011000, 0b00010000 }  // ED 19

};

void turnOn(uint8_t led ) {

  DDRB = matrix[led][DDR_BYTE];

  PORTB = matrix[led][PORT_BYTE];

}

void turnOff(void)

{

  DDRB = 0b00000000;

  PORTB = 0b00000000;

}

void load(int8_t led1, uint8_t led2, uint8_t led3)

{

  for(l = 1; l < LOOPTIME;l++)

  {

    turnOn(led1);

    _delay_ms(TIME0);

    if(led2 < 19 )

    {

      turnOn(led2);

      _delay_ms(TIME1);

    }

    if(led2 == 19)

    {

      turnOn(led2);

      _delay_ms(TIME2);

    }

    if(led3 < 20)

    {

      turnOn(led3);

      _delay_ms(TIME2);

    }

  }

}

void fadeout(void)

{

  uint8_t counter = LOOPTIME * 4;

  while(counter > LOOPTIME *3)

  {

    turnOn(19);

    _delay_ms(3*TIME1);

    turnOff();

    _delay_ms(TIME1);

    counter--;

  }

  while(counter > LOOPTIME * 2)

  {

    turnOn(19);

    _delay_ms(2*TIME1);

    turnOff();

    _delay_ms(2*TIME1);

    counter--;

  }

  while (counter > LOOPTIME)

  {

    turnOn(19);

    _delay_ms(TIME1);

    turnOff();

    _delay_ms(3*TIME1);

    counter--;

  }

  while(counter > 0)

  {

    turnOn(19);

    _delay_ms(TIME1/2);

    turnOff();

    _delay_ms(4*TIME1);

    counter--;

  }

}

int main(void)

{

  while(1)

  {

    _delay_ms(TIME2);

    load(0,1,2);

    load(1,2,3);

    load(2,3,4);

    load(3,4,5);

    load(4,5,6);

    load(5,6,7);

    load(6,7,8);

    load(7,8,9);

    load(8,9,10);

    load(9,10,11);

    load(10,11,12);

    load(11,12,13);

    load(12,13,14);

    load(13,14,15);

    load(14,15,16);

    load(15,16,17);

    load(16,17,18);

    load(17,18,19);

    load(18,19,20);

    fadeout();

  }

}