1 | //uart_puts("test");
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2 |
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3 | _delay_ms(4000);
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4 | TWBR = ((14745600UL/100000)-16/2);
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5 | _delay_ms(2000);
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6 | PORTC |= (1 << DDC2);
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7 |
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8 | //uart_puts("test2");
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9 |
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10 | //eeprom_twi_tests:
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11 | char SLA_W = 0xA0;
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12 | int DATA0 = 0x00;
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13 | int DATA1 = 0x00;
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14 | int DATA2 = 0xAB;
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15 | int DATA3 = 0xAB;
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16 |
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17 | TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN); //uC als Master definieren, START condition
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18 | while (!(TWCR & (1<<TWINT))); //warten und prüfen ob richtig gesendet
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19 | if ((TWSR & 0xF8) != TW_START){ //Wenn anderer Wert als beim senden --> Error
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20 | //error?
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21 | uart_puts("error01");
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22 | }
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23 |
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24 | TWDR = SLA_W; //SLA_W sendet die Adresse
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25 | TWCR = (1<<TWINT) | (1<<TWEN);
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26 | while (!(TWCR & (1<<TWINT)));
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27 | if((TWSR & 0xF8) != TW_MT_SLA_ACK){
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28 | //error?
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29 | uart_puts("error02");
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30 | }
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31 | uart_putc(TWSR); // DEBUG - 0x18 (alles okay)
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32 |
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33 | //error?
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34 | TWDR = DATA0; //Data -> Daten in das TWDR Register geladen werden sollen
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35 | TWCR = (1<<TWINT) | (1<<TWEN);
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36 | while (!(TWCR & (1<<TWINT)));
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37 | if ((TWSR & 0xF8) != TW_MT_DATA_ACK){
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38 | //error?
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39 | uart_puts("error03");
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40 | }
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41 | uart_putc(TWSR); // DEBUG - 0x28 (alles okay)
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42 |
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43 | TWDR = DATA1;
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44 | TWCR = (1<<TWINT) | (1<<TWEN);
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45 | while (!(TWCR & (1<<TWINT)));
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46 | if ((TWSR & 0xF8) != TW_MT_DATA_ACK){
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47 | //error?
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48 | uart_puts("error04");
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49 | }
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50 | uart_putc(TWSR); // DEBUG - 0x28 (alles okay)
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51 |
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52 | TWDR = DATA2;
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53 | TWCR = (1<<TWINT) | (1<<TWEN);
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54 | while (!(TWCR & (1<<TWINT)));
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55 |
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56 | TWDR = DATA3;
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57 | TWCR = (1<<TWINT) | (1<<TWEN);
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58 | while (!(TWCR & (1<<TWINT)));
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59 |
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60 | TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWSTO); //Transmit Stop condition
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61 | while (TWCR & (1<<TWINT));
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62 |
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63 | PORTC &= ~(1 << DDC2);
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64 |
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65 |
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66 |
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67 |
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68 |
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69 |
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70 |
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71 |
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72 |
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73 |
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74 | SLA_W = 0xA0;
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75 | char DATA00 = 0x00;
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76 | char DATA01 = 0x00;
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77 |
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78 | char SLA_R = 0xA1;
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79 |
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80 | _delay_ms(2000);
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81 |
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82 | TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN); //Start
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83 | while (!(TWCR & (1<<TWINT)));
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84 | if ((TWSR & 0xF8) != TW_START){
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85 | //error?
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86 | uart_puts("error07");
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87 | }
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88 |
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89 | TWDR = SLA_W;
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90 | TWCR = (1<<TWINT) | (1<<TWEN);
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91 | while (!(TWCR & (1<<TWINT)));
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92 | if((TWSR & 0xF8) != TW_MT_SLA_ACK){
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93 | //error?
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94 | uart_puts("error08");
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95 | }
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96 |
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97 | TWDR = DATA00;
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98 | TWCR = (1<<TWINT) | (1<<TWEN);
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99 | while (!(TWCR & (1<<TWINT)));
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100 | if((TWSR & 0xF8) != TW_MT_DATA_ACK){
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101 | //error?
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102 | uart_puts("error09");
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103 | }
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104 |
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105 | TWDR = DATA01;
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106 | TWCR = (1<<TWINT) | (1<<TWEN);
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107 | while (!(TWCR & (1<<TWINT)));
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108 | if((TWSR & 0xF8) != TW_MT_DATA_ACK){
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109 | //error?
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110 | uart_puts("error10");
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111 | }
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112 |
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113 |
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114 | TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN); //ReStart
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115 | while (!(TWCR & (1<<TWINT)));
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116 |
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117 | if ((TWSR & 0xF8) != TW_REP_START){
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118 | //error?
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119 | uart_puts("error11");
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120 | }
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121 |
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122 | uart_putc(TWSR); // DEBUG - 0x10 (A repeatet START condition has been transmitted)
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123 |
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124 | TWDR = SLA_R;
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125 | TWCR = (1<<TWINT) | (1<<TWEN);
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126 | while (!(TWCR & (1<<TWINT)));
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127 | if((TWSR & 0xF8) != TW_MT_SLA_ACK){
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128 | //error?
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129 | uart_puts("error12");
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130 | }
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131 |
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132 | uart_putc(TWSR); // Mega seltsamer 0x00 Wert
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133 |
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134 | uart_putc(TWDR);
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135 |
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136 | TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWSTO); //Transmit Stop condition
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