1 | #define F_CPU 80000000
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2 |
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3 | #include <avr/io.h>
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4 | //#include <util/delay.h>
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5 | #include <avr/interrupt.h>
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6 | #include <avr/signal.h>
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7 | #include <stdint.h>
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8 | #include <stdio.h>
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9 | //---------------------------------------------------------------------------
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10 | //Globale Variablen
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11 | //---------------------------------------------------------------------------
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12 |
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13 | volatile unsigned int takt_1s = 0; //Wird alle 1s von Timer-ISR auf
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14 | //1 gesetzt und in main() bearbeitet.
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15 |
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16 | volatile unsigned int schritt = 0; //aktueller Programmschritt
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17 |
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18 | //---------------------------------------------------------------------------
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19 | //Hauptprogramm
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20 | //---------------------------------------------------------------------------
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21 |
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22 |
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23 |
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24 | int main(void)
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25 | {
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26 | DDRB=0b11111111; //Port B alles Ausgaenge
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27 |
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28 | TIMSK=(1<<TOIE1) | (1<<=OCIE1A) | (1<<OCIE1B); //Timer 1 Overflow und Compare
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29 | //Match Interrupts einschalten
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30 |
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31 |
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32 |
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33 | TCCR1B=(1<<CS12); //Timer 1 mit Prescaler=256 von int. Clock (bei 16Mhz wird
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34 | //Timer 1 alle 16us um 1 erhoeht)
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35 |
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36 |
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37 | OCR1AH=0b00000010; // Timer 1 Compare Match A bei 625
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38 | OCR1AL=0b01110001; // (erzeugt Takt von 10ms)
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39 |
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40 | sei(); // Globale Interrupts einschalten
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41 |
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42 | while(1); // Beginn der Endlosschleife
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43 |
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44 | {
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45 | if(takt_1s==1)
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46 | {
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47 | takt_1s=0;
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48 |
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49 | if(schritt==0) PORTB=0b00000000;
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50 |
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51 | else if (schritt==1) PORTB=0b00000001;
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52 | else if (schritt==2) PORTB=0b00000010;
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53 | else if (schritt==3) PORTB=0b00000100;
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54 | else if (schritt==4) PORTB=0b00001000;
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55 | else if (schritt==5) PORTB=0b00010000;
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56 | else if (schritt==6) PORTB=0b00100000;
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57 | else if (schritt==7) PORTB=0b01000000;
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58 | else if (schritt==8) PORTB=0b10000000;
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59 |
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60 | schritt++;
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61 | if (schritt>=9) schritt=0;
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62 | }//if schleife
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63 | }//while(1)
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64 |
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65 | return(0);
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66 | }//void main
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67 |
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68 |
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69 | //-------------------------------------------------------------------------
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70 | // Interrupt Subroutinen
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71 | //-------------------------------------------------------------------------
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72 |
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73 |
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74 | ISR (TIMER1_OVF_vect) // Timer 1 Ueberlauf
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75 |
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76 | {
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77 |
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78 | }
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79 |
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80 | ISR (TIMER1_COMPA_vect) // Timer Compare Match A
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81 |
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82 | {
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83 | static unsigned long int zaehler=0;
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84 | TCNT1H=0; // Timer 1 zurücksetzen
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85 | TCNT1L=1;
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86 | zaehler++; // Zaehler alle 10ms erhoehen
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87 | if (zaehler>=100) // Zaehler >100 bedeutet 1s
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88 |
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89 | {
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90 | zaehler=0;
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91 | takt_1s=1;
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92 | }
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93 |
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94 | }
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95 |
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96 |
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97 | ISR (TIMER1_COMPB_vect) // Timer 1 Compare Match B
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98 |
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99 | {
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100 |
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101 | }
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