[1190] | 1 | |
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| 2 | |
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| 3 | //Declaration of Arduino pins used as CA3161E (BCD-Decoder) inputs |
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| 4 | |
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| 5 | const int A=4; // wir ordnen der Variablen A die Zahl 4 zu |
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| 6 | const int B=5; // wir koennten auch ueberall fuer A,B,C,D die Zahlen 4,5,6,7 verwenden |
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| 7 | const int C=6; |
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| 8 | const int D=7; |
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| 9 | |
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| 10 | const int TASTE = 8; // gedrueckt: LOW |
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| 11 | |
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| 12 | void setup() { |
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| 13 | pinMode(TASTE, INPUT_PULLUP); |
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| 14 | pinMode(A, OUTPUT); // 2^0 |
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| 15 | pinMode(B, OUTPUT); |
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| 16 | pinMode(C, OUTPUT); |
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| 17 | pinMode(D, OUTPUT); // 2^3 |
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| 18 | |
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| 19 | Serial.begin(9600); |
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| 20 | |
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| 21 | } |
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| 22 | |
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| 23 | int count = 0; //the variable used to show the number |
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| 24 | |
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| 25 | void loop() { |
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| 26 | if (digitalRead(TASTE) == LOW) //if button is pressed |
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| 27 | { |
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| 28 | count++; // ausfuehrlich: c=c+1 |
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| 29 | delay(500); //the delay prevent from button bouncing |
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| 30 | if (count == 10) //we want to count from 0 to 9! |
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| 31 | count = 0; |
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| 32 | |
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| 33 | /*{ alternativ mit C++ : |
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| 34 | Setzten der vier oberen PINs des Ports D und beibehalten der Zustände der unteren vier PINs |
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| 35 | PORTD = (count << 4) & 0xf0 | (PORTD & 0xf) ; |
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| 36 | return ; //diese 2 Zeilen bewirken das Gleiche, wie der Rest unten. Sie sind aber "deaktiviert" |
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| 37 | //weil wir sie noch nicht verstehen! } |
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| 38 | */ |
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| 39 | |
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| 40 | if (count == 0) //write 0000 ab hier steht die Umsetzung des BCD Codes |
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| 41 | { |
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| 42 | digitalWrite(A, LOW); |
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| 43 | digitalWrite(B, LOW); |
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| 44 | digitalWrite(C, LOW); |
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| 45 | digitalWrite(D, LOW); |
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| 46 | |
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| 47 | } |
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| 48 | |
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| 49 | if (count == 1) //write 0001 |
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| 50 | { |
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| 51 | digitalWrite(A, HIGH); |
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| 52 | digitalWrite(B, LOW); |
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| 53 | digitalWrite(C, LOW); |
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| 54 | digitalWrite(D, LOW); |
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| 55 | |
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| 56 | } |
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| 57 | |
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| 58 | if (count == 2) //write 0010 |
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| 59 | { |
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| 60 | digitalWrite(A, LOW); |
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| 61 | digitalWrite(B, HIGH); |
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| 62 | digitalWrite(C, LOW); |
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| 63 | digitalWrite(D, LOW); |
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| 64 | |
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| 65 | } |
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| 66 | |
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| 67 | if (count == 3) //write 0011 |
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| 68 | { |
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| 69 | digitalWrite(A, HIGH); |
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| 70 | digitalWrite(B, HIGH); |
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| 71 | digitalWrite(C, LOW); |
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| 72 | digitalWrite(D, LOW); |
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| 73 | |
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| 74 | } |
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| 75 | |
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| 76 | if (count == 4) //write 0100 |
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| 77 | { |
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| 78 | digitalWrite(A, LOW); |
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| 79 | digitalWrite(B, LOW); |
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| 80 | digitalWrite(C, HIGH); |
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| 81 | digitalWrite(D, LOW); |
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| 82 | } |
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| 83 | |
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| 84 | if (count == 5) //write 0101 |
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| 85 | { |
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| 86 | digitalWrite(A, HIGH); |
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| 87 | digitalWrite(B, LOW); |
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| 88 | digitalWrite(C, HIGH); |
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| 89 | digitalWrite(D, LOW); |
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| 90 | } |
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| 91 | |
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| 92 | if (count == 6) //write 0110 |
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| 93 | { |
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| 94 | digitalWrite(A, LOW); |
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| 95 | digitalWrite(B, HIGH); |
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| 96 | digitalWrite(C, HIGH); |
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| 97 | digitalWrite(D, LOW); |
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| 98 | } |
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| 99 | |
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| 100 | if (count == 7) //write 0111 |
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| 101 | { |
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| 102 | digitalWrite(A, HIGH); |
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| 103 | digitalWrite(B, HIGH); |
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| 104 | digitalWrite(C, HIGH); |
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| 105 | digitalWrite(D, LOW); |
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| 106 | } |
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| 107 | |
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| 108 | if (count == 8) //write 1000 |
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| 109 | { |
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| 110 | digitalWrite(A, LOW); |
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| 111 | digitalWrite(B, LOW); |
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| 112 | digitalWrite(C, LOW); |
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| 113 | digitalWrite(D, HIGH); |
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| 114 | } |
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| 115 | |
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| 116 | if (count == 9) //write 1001 |
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| 117 | { |
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| 118 | digitalWrite(A, HIGH); |
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| 119 | digitalWrite(B, LOW); |
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| 120 | digitalWrite(C, LOW); |
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| 121 | digitalWrite(D, HIGH); |
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| 122 | } |
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| 123 | } |
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| 124 | |
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| 125 | } |
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