1 | #include <avr/io.h> // Deklarationen
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2 |
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3 | #include <avr/interrupt.h>
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4 |
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5 | #define BAUD 9600 // Symbol fuer Baudrate
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6 | #define TAKT 3686400 // Symbol fuer Controllertakt
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7 | #define TEILER (long)TAKT/(16*(long)BAUD) - 1 // Symbol fuer Teiler
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8 |
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9 |
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10 | char abc = '0';
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11 |
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12 |
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13 |
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14 | void EEPROM_write(unsigned int uiAddress, unsigned char ucData)
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15 | {
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16 | /* Wait for completion of previous write */
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17 | while(EECR & (1<<EEWE));
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18 | /* Set up address and data registers */
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19 | EEAR = uiAddress;
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20 | EEDR = ucData;
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21 | /* Write logical one to EEMWE */
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22 | EECR |= (1<<EEMWE);
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23 | /* Start eeprom write by setting EEWE */
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24 | EECR |= (1<<EEWE);
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25 | }
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26 |
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27 | unsigned char EEPROM_read(unsigned int uiAddress)
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28 | {
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29 | /* Wait for completion of previous write */
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30 | while(EECR & (1<<EEWE));
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31 | /* Set up address register */
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32 | EEAR = uiAddress;
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33 | /* Start eeprom read by writing EERE */
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34 | EECR |= (1<<EERE);
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35 | /* Return data from data register */
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36 | return EEDR;
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37 | }
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38 |
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39 | void UART_Init(void) // UART initialisieren
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40 | {
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41 |
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42 |
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43 | UBRRL = TEILER; // Baudrate einstellen
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44 | UCSRB |= (1<<RXEN); // Empfaenger ein
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45 | UCSRB |= (1<<TXEN); // Sender ein
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46 | UCSRB |= (1<<RXCIE); // Empfaengerinterrupt frei
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47 | }
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48 |
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49 |
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50 | void UART_putch(unsigned char data) // warten und Zeichen nach Sender
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51 | {
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52 | //warte bis UDR leer ist UCSRA / USR bei z.B.: 2313
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53 | while (!(UCSRA&0x20));
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54 | //sende
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55 | UDR = data;
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56 | }
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57 |
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58 |
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59 | void UART_putstr(unsigned char *zeiger) // String bis Endemarke ausgeben
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60 | {
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61 | while (*zeiger != 0)
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62 | {
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63 | while (!(UCSRA&0x20)); // warte bis Datenregister frei
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64 | UDR = *zeiger; // Zeichen nach Sendedatenregister
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65 | zeiger++;
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66 | }
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67 | }
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68 |
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69 | char gg;
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70 |
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71 | SIGNAL(SIG_UART_RECV) // Interrupt-Service fuer Empfaenger
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72 | {
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73 | register unsigned char received_ch; // Hilfsregister
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74 |
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75 | received_ch = UDR;
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76 | // uart_putch(received_ch); // Zeichen abholen
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77 | while (!(UCSRA&0x20)); // warte bis Datenregister frei
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78 |
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79 |
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80 |
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81 | if(received_ch == 'a')
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82 | {
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83 | //abc = 'a';
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84 | EEPROM_write(1, 'a');
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85 | }
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86 | else if(received_ch == 'b')
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87 | {
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88 | //abc = 'b';
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89 | EEPROM_write(1, 'b');
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90 | }
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91 | else if(received_ch == 'c')
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92 | {
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93 | // abc = 'c';
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94 | EEPROM_write(1, 'c');
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95 | }
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96 |
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97 | else if(received_ch == 'g')
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98 | {
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99 |
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100 |
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101 | gg = EEPROM_read(1);
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102 | UART_putch(gg);
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103 | UART_putstr("\r\n");
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104 | }
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105 |
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106 | }
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107 |
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108 |
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109 | int main(void) // Hauptfunktion
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110 | {
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111 |
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112 | UART_Init(); // UART initialisieren
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113 | sei();
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114 |
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115 | while(1) // Arbeitsschleife ist leer
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116 | {
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117 |
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118 |
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119 | } //end while(1)
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120 |
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121 | } // Ende main
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