1 | #include <Wire.h> // auch einmal auskommentieren wegen DWARF Error
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2 |
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3 | const byte BUFLEN = 20;
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4 | char readData[BUFLEN];
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5 |
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6 | const char *INIT_COMMAND = "re";
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7 | const char *TABLE_LAYOUT_COMMAND = "tl";
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8 | const char *HIGHLIGHT_BOX_COMMAND = "hb";
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9 | const char *DELIMITER = "|";
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10 |
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11 | const byte ANZAHL_LEDS = 8;
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12 | const byte pin_indices[ANZAHL_LEDS] = {9, 8, 7, 6, 5, 4, 3, 2};
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13 |
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14 | void setup()
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15 | {
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16 | for (byte i = 0; i < ANZAHL_LEDS; i++) {
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17 | pinMode(pin_indices[i], OUTPUT);
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18 | }
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19 |
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20 | TCCR1B = 0;
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21 | TCCR1A = 0;
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22 | TIMSK1 = 0;
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23 | TCCR1B = _BV(CS12) | _BV(CS10);
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24 |
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25 | Serial.begin(9600);
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26 | }
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27 |
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28 | void loop()
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29 | {
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30 | if (readSerial() ) {
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31 | processReadData();
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32 | }
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33 | }
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34 |
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35 |
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36 | bool readSerial()
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37 | {
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38 | bool state = false;
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39 | static byte index = 0;
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40 |
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41 | while (Serial.available() )
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42 | {
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43 | char c = Serial.read();
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44 |
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45 | if (c >= 32 && (index < BUFLEN - 1) ) {
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46 | readData[index++] = c;
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47 | }
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48 | else if (c == '\n') {
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49 | readData[index] = '\0'; // terminate the string
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50 | index = 0;
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51 | state = true;
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52 | }
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53 | }
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54 | return state;
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55 | }
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56 |
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57 | void resetTimer()
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58 | {
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59 | noInterrupts();
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60 | TCNT1 = 18661;
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61 | TIMSK1 = _BV(TOIE1);
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62 | interrupts();
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63 | }
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64 |
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65 | ISR(TIMER1_OVF_vect)
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66 | {
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67 | resetLEDs();
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68 | TIMSK1 = 0;
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69 | }
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70 |
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71 | void resetLEDs()
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72 | {
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73 | for (byte i = 0; i < ANZAHL_LEDS; i++) {
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74 | digitalWrite(pin_indices[i], LOW);
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75 | }
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76 | }
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77 |
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78 | void setLEDs(const byte input)
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79 | {
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80 | for (byte i = 0; i < ANZAHL_LEDS; i++) {
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81 | byte mask = 1 << i;
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82 |
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83 | if (mask & input) {
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84 | digitalWrite(pin_indices[i], HIGH);
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85 | }
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86 | else {
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87 | digitalWrite(pin_indices[i], LOW);
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88 | }
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89 | }
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90 | }
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91 |
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92 | void processReadData()
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93 | {
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94 | char *token = strtok(readData, DELIMITER);
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95 |
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96 | if (token != NULL) {
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97 | if (strcmp(token, INIT_COMMAND) == 0) {
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98 | Serial.write("bin\n");
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99 | return;
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100 | }
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101 |
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102 | if (strcmp(token, HIGHLIGHT_BOX_COMMAND) == 0) {
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103 | token = strtok(NULL, DELIMITER);
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104 | setLEDs(atoi(token));
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105 | resetTimer();
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106 | }
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107 | }
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108 | }
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