1 | /*
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2 | * FerRemote.c
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3 | *
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4 | * Version: 0.1
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5 | *
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6 | * Created: 25.07.2013 01:37:51
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7 | * Author: iLem0n
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8 | */
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9 |
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10 | #include <avr/io.h>
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11 | #include <avr/interrupt.h>
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12 | #include <util/delay.h>
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13 | #include <string.h>
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14 |
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15 | #define USART_BUFFER_SIZE 32
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16 | #define BAUD 9600UL
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17 |
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18 | //Baudrate und Taktfrequenz prüfen
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19 | #define UBRR_VAL ((F_CPU+BAUD*8)/(BAUD*16)-1)
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20 | #define BAUD_REAL (F_CPU/(16*(UBRR_VAL+1)))
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21 | #define BAUD_ERROR ((BAUD_REAL*1000)/BAUD)
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22 |
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23 | #if ((BAUD_ERROR<990) || (BAUD_ERROR>1010))
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24 | #error Systematischer Fehler der Baudrate größer 1% und damit zu hoch!
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25 | #endif
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26 |
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27 | //Ein-/Ausgänge
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28 | #define IN_OPENED PB0
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29 | #define IN_CLOSED PB1
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30 |
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31 | #define OUT_OPEN PC0
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32 | #define OUT_CLOSE PC1
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33 | #define OUT_STATUS_LED PC2
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34 |
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35 | //Globale Variablen
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36 | #define uart_buffer_size 32
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37 | volatile uint8_t usart_RX_Complete = 0; // Flag, String komplett empfangen
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38 | volatile uint8_t usart_TX_Complete = 1; // Flag, String komplett gesendet
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39 | char usart_RX_buffer[USART_BUFFER_SIZE]; // Empfangspuffer
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40 | char usart_TX_buffer[USART_BUFFER_SIZE]; // Sendepuffer
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41 |
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42 | //Hilfsmethoden
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43 | void initUSART();
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44 | void sendString(char* string);
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45 |
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46 | //Hauptmethode
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47 | int main(void)
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48 | {
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49 | //I/O-Ebene Konfigurieren
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50 | DDRB &= ~((1<<IN_CLOSED) | (1<<IN_OPENED));
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51 | PORTB |= (1<<IN_CLOSED) | (1<<IN_OPENED);
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52 |
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53 | DDRC |= (1<<OUT_STATUS_LED) | (1<<OUT_OPEN) | (1<<OUT_CLOSE);
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54 |
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55 |
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56 | initUSART(); //USART initalisieren
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57 | sei(); //Globale Interrupts zulassen
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58 |
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59 | //Hauptschleife
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60 | while(1){
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61 | /*
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62 | PORTC &= ~((1<<OUT_CLOSE) | (1<<OUT_OPEN));
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63 | PORTC |= (1<<OUT_STATUS_LED);
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64 | _delay_ms(1000);
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65 | PORTC &= ~(1<<OUT_STATUS_LED);
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66 | _delay_ms(1000);
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67 | */
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68 |
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69 | if (usart_RX_Complete == 1){
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70 | sendString(usart_RX_buffer);
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71 |
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72 | if (strcmp(usart_RX_buffer, "Test\r") == 0){
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73 | PORTC |= (1<<OUT_STATUS_LED);
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74 | }
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75 | if (strcmp(usart_RX_buffer, "Test\0") == 0){
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76 | PORTC |= (1<<OUT_OPEN);
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77 | }
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78 | if (strcmp(usart_RX_buffer, "Test\n") == 0){
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79 | PORTC |= (1<<OUT_CLOSE);
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80 | }
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81 |
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82 |
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83 | /*
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84 | sendString(usart_RX_buffer);
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85 | if (strcmp(usart_RX_buffer,"OpenCage")){
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86 | while ( PINB & (1<<IN_OPENED)){
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87 | PORTC |= (1<<OUT_OPEN);
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88 | }
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89 | PORTC &= ~(1<<OUT_OPEN);
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90 | sendString("Cage_Opened");
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91 | }
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92 |
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93 | if (strcmp(usart_RX_buffer, "CloseCage")){
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94 | while ( PINB & (1<<IN_CLOSED)){
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95 | PORTC &= ~(1<<OUT_OPEN);
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96 | PORTC |= (1<<OUT_CLOSE);
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97 | }
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98 | PORTC &= ~(1<<OUT_CLOSE);
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99 | sendString("Cage_Closed");
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100 | }
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101 | */
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102 | usart_RX_Complete = 0;
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103 | }
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104 | }
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105 | }
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106 |
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107 | //###### USART #####
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108 | void initUSART(){
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109 | UBRRH = (unsigned char)(UBRR_VAL>>8);
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110 | UBRRL = (unsigned char) UBRR_VAL;
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111 |
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112 | UCSRB = (1<<RXEN) | (1<<TXEN) | (1<<RXCIE); //RXEN(Empfang), TXEN(Senden), RXCIE(Empfang komplett Interrupt),
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113 | UCSRC = (1<<URSEL) | (3<<UCSZ0); //1 Stop Bit(s), 8-bit
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114 | }
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115 |
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116 | //##### Senden #####
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117 | void sendString(char* string){
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118 | if (usart_TX_Complete == 1){
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119 | strcpy(usart_TX_buffer, string); //String in Sendebuffer laden
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120 | usart_TX_Complete = 0; //Flag zurücksetzen
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121 | UCSRB |= (1<<UDRIE); //Senden Interrupt erlauben
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122 | }
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123 | }
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124 |
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125 | //###### Interrupts #####
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126 | ISR(USART_RXC_vect) {
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127 | //Init
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128 | static uint8_t usart_RX_cnt;
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129 | char data;
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130 |
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131 | data = UDR; //Zeichen aus Empfangsregister laden
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132 |
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133 | if (!usart_RX_Complete) { //Wenn Empfangen nicht abgeschlossen
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134 | if (data=='\r') { //Wenn CarriageReturn
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135 | usart_RX_buffer[usart_RX_cnt]="\0"; //String terminieren
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136 | usart_RX_Complete=1; //"Empfang komplett"-Flag setzten
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137 | usart_RX_cnt=0; //Empfangszähler rücksetzen
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138 | }else if (usart_RX_cnt<(USART_BUFFER_SIZE-1)) { //Bufferüberlauf verhindern
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139 | usart_RX_buffer[usart_RX_cnt]=data; //Zeichen in Empfangsbuffer schreiben
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140 | usart_RX_cnt++; //hochzählen
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141 | }
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142 | }
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143 | }
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144 |
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145 | ISR(USART_UDRE_vect) {
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146 | //Init
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147 | static char* usart_TX_pointer = usart_TX_buffer; //Pointer auf Sendebuffer
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148 | char data;
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149 |
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150 | data = *usart_TX_pointer++; //Zähler im Sendebuffer um 1+ verschieben
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151 |
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152 | if (data=="\0") { //Wenn terminiert,
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153 | UCSRB &= ~(1<<UDRIE); //Interrupt verbieten
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154 | usart_TX_pointer = usart_TX_buffer; //Pointer zurücksetzen
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155 | usart_TX_Complete = 1; //"Senden komplett"-Flag setzen
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156 | }else UDR = data; //Wenn nicht termniniert Zeichen senden
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157 | }
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