1 | //RS485 Definitionen***********************************************
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2 |
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3 |
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4 | #define TRANSMIT_CONF DDRA|= (1<<DDA4)
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5 | #define TRANSMIT_ON PORTA |= (1<<PA4)
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6 | #define TRANSMIT_OFF PORTA &= ~(1<<PA4)
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7 |
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8 | volatile uint8_t uart_transmit_progress = 0;
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9 | volatile uint8_t uart_r_array[10];
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10 | volatile uint8_t uart_back_read = 0;
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11 | volatile uint8_t u_rx_start = 0;
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12 | volatile uint8_t receive_max = 6;
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13 | volatile char u_receive_string[15];
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14 | volatile uint8_t u_r_c = 0; //Daten an UART empfangen
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15 |
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16 | //************** RS485 Funktionen *********************************************************
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17 |
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18 |
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19 | void USART_Transmit( char data )
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20 | {
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21 |
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22 | /* Wait for empty transmit buffer */
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23 | while ( !( UCSRA & (1<<UDRE)) )
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24 | ;
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25 | /* Put data into buffer, sends the data */
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26 | UDR = data;
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27 | }
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28 |
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29 | void uart_puts(char *s,uint8_t count)
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30 | {
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31 |
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32 | uint8_t i;
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33 | uart_transmit_progress = 1;
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34 | for (i=0;i<count;i++)
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35 | {
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36 | TRANSMIT_ON;
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37 | USART_Transmit(s[i]);
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38 | while(!(uart_back_read))
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39 | ;
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40 | uart_back_read = 0;
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41 | u_rx_start=0;
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42 | }
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43 | uart_transmit_progress= 0;
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44 |
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45 | }
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46 |
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47 | ISR(USART_TXC_vect)
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48 | {
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49 | TRANSMIT_OFF;
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50 | }
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51 |
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52 | void uart_putc(char c)
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53 | {
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54 | TRANSMIT_ON;
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55 | USART_Transmit(c);
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56 | }
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57 |
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58 | ISR(USART_RXC_vect)
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59 | {
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60 | uint8_t i;
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61 | if(uart_transmit_progress)
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62 | {
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63 | uart_r_array[u_rx_start] = UDR;
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64 | uart_back_read=1;
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65 |
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66 | u_rx_start++;
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67 | }
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68 | else
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69 | {
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70 |
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71 |
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72 | //USART_Transmit(receive_string[i]);
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73 | //USART_Transmit(i);
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74 | i = u_rx_start;
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75 | u_receive_string[i] = UDR;
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76 | //lcd_putc(i);
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77 | /*if (i==1)
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78 | {
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79 | if((u_receive_string[i]>>4)== 16)
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80 | {
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81 | receive_max = 10;
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82 | }
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83 | else
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84 | {
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85 | receive_max = 9;
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86 | }
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87 | }
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88 | */
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89 | if(i == receive_max)
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90 | {
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91 | u_rx_start=0;
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92 | LED3_ON ;
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93 | u_r_c = receive_max;
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94 | //USART_Transmit('Z');
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95 |
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96 | }
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97 | else
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98 | {
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99 |
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100 | i++;
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101 | u_rx_start = i;
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102 | }
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103 | }
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104 | }
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105 |
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106 | int main(void)
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107 | {
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108 |
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109 | //Interrupt-Eingänge konfigurieren
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110 | PORTD |= (1<<2);
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111 | PORTD |= (1<<3);
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112 | PORTB |= (1<<2) | (1<<3);
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113 |
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114 |
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115 | //Taster pullup akitivieren
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116 | TASTER_PULLUP |= (1<<TASTER_PIN);
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117 |
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118 | //LED-Ausgänge konfigurieren
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119 | DDRA |= (1<<DDA7) | (1<<DDA6) | (1<<DDA5);
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120 |
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121 |
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122 | //USART initialisieren
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123 |
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124 | TRANSMIT_CONF; // Transmit Pin als Ausgang
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125 | //USART0
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126 | UBRRH = UBRR_VAL_UART >> 8;
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127 | UBRRL = UBRR_VAL_UART& 0xFF;
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128 |
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129 | //USART0
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130 | UCSRB |= (1<<TXEN); // UART TX einschalten
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131 | UCSRB |= (1<<RXEN);
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132 | UCSRB |= (1<<RXCIE);
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133 | UCSRB |= (1<<TXCIE);
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134 | UCSRC |= (1<<URSEL)|(1<<UCSZ0)| (1<<UCSZ1); // Asynchron 8N1
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135 |
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136 | //Sensor-Interrupts aktivieren
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137 | // MCUCR |= (1<<ISC11) | (1<<ISC01); //fallende Flanke auf INT0 und INT1
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138 | // MCUCSR &= ~(1<<ISC2);
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139 | // GICR |= (1<<INT0) | (1<<INT1) | (1<<INT2);
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140 |
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141 | sei();
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142 | //uart_putc((uint8_t) receive_max);
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143 | //uart_putc('O');
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144 | //uart_putc('K');
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145 | //Master_send_command(1,16,12312);
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146 |
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147 |
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148 |
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149 |
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150 |
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151 |
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152 |
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153 | /*********************************************************************/
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154 |
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155 | // Messung der Interruptdauer
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156 | tmp =0;
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157 | tmp =0;
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158 | tmp =0;
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159 |
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160 | // Debug
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161 |
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162 |
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163 | int16_t be3;
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164 | uint8_t testv;
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165 | testv = 0;
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166 | uint8_t direction;
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167 | direction = 1;
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168 |
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169 | while(1)
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170 | {
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171 | if(u_r_c) //Es wurden Daten empfangen
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172 | {
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173 |
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174 |
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175 |
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176 | uart_putc((uint8_t) u_r_c);
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177 | u_r_c = 0;
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178 | }
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179 | }
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180 | }
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