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| 1 | +// Yu Hin Hau |
| 2 | +// Robotic Car via H-Bridge (L298) |
| 3 | +// June 5, 2012 |
| 4 | +// Modified for infrared by: Lars Age Kamfjord github.com/laaknor |
| 5 | + |
| 6 | +#include <IRremote.h> |
| 7 | + |
| 8 | +const int irPin = 3; |
| 9 | + |
| 10 | +IRrecv irrecv (irPin); |
| 11 | +decode_results results; |
| 12 | + |
| 13 | +//Define Pins |
| 14 | +int enableA = 2; // ENA |
| 15 | +int pinA1 = 1; // IN2 |
| 16 | +int pinA2 = 0; // IN1 |
| 17 | + |
| 18 | +int enableB = 6; // ENB |
| 19 | +int pinB1 = 5; //IN4 |
| 20 | +int pinB2 = 4; // IN3 |
| 21 | + |
| 22 | +void setup() { |
| 23 | + |
| 24 | + pinMode(enableA, OUTPUT); |
| 25 | + pinMode(pinA1, OUTPUT); |
| 26 | + pinMode(pinA2, OUTPUT); |
| 27 | + |
| 28 | + pinMode(enableB, OUTPUT); |
| 29 | + pinMode(pinB1, OUTPUT); |
| 30 | + pinMode(pinB2, OUTPUT); |
| 31 | + irrecv.enableIRIn(); |
| 32 | + Serial.begin(9600); |
| 33 | + |
| 34 | +} // End setup |
| 35 | + |
| 36 | + |
| 37 | +//command sequence |
| 38 | +void loop() { |
| 39 | + |
| 40 | + if(irrecv.decode(&results)) { |
| 41 | + irrecv.resume(); |
| 42 | + if(results.value == 0xFF9867) { |
| 43 | + Serial.println("Going forward!"); |
| 44 | + enableMotors(); |
| 45 | + forward(1000); |
| 46 | + disableMotors(); |
| 47 | + } // End if results == FF9867 UP |
| 48 | + else if(results.value == 0xFF30CF) { |
| 49 | + Serial.println("Going LEFT"); |
| 50 | + enableMotors(); |
| 51 | + turnLeft(250); |
| 52 | + disableMotors(); |
| 53 | + } // End if results == FF30CF LEFT |
| 54 | + else if(results.value == 0xFF18E7) { |
| 55 | + Serial.println("Going back!"); |
| 56 | + enableMotors(); |
| 57 | + backward(500); |
| 58 | + disableMotors(); |
| 59 | + } // End if results == FF18E7 BACK |
| 60 | + else if(results.value == 0xFF7A85) { |
| 61 | + Serial.println("Going RIGHT!"); |
| 62 | + enableMotors(); |
| 63 | + turnRight(250); |
| 64 | + disableMotors(); |
| 65 | + } // End if results == FF7A85 RIGHT |
| 66 | + |
| 67 | +// else disableMotors(); |
| 68 | + } // end irrecv.decode |
| 69 | +} // End loop |
| 70 | + |
| 71 | +//Define Low Level H-Bridge Commands |
| 72 | + |
| 73 | +//enable motors |
| 74 | +void motorAOn() |
| 75 | +{ |
| 76 | + digitalWrite(enableA, HIGH); |
| 77 | + Serial.println("enableA=HIGH"); |
| 78 | +} |
| 79 | + |
| 80 | +void motorBOn() |
| 81 | +{ |
| 82 | + digitalWrite(enableB, HIGH); |
| 83 | + Serial.println("enableB=HIGH"); |
| 84 | +} |
| 85 | + |
| 86 | + //disable motors |
| 87 | +void motorAOff() |
| 88 | +{ |
| 89 | + digitalWrite(enableA, LOW); |
| 90 | + Serial.println("enableA=LOW"); |
| 91 | +} |
| 92 | + |
| 93 | +void motorBOff() |
| 94 | +{ |
| 95 | + digitalWrite(enableB, LOW); |
| 96 | + Serial.println("enableB=LOW"); |
| 97 | +} |
| 98 | + |
| 99 | + //motor A controls |
| 100 | +void motorAForward() |
| 101 | +{ |
| 102 | + digitalWrite(pinA1, HIGH); |
| 103 | + digitalWrite(pinA2, LOW); |
| 104 | + Serial.println("Motor A, HIGH-LOW"); |
| 105 | +} |
| 106 | + |
| 107 | +void motorABackward() |
| 108 | +{ |
| 109 | + digitalWrite(pinA1, LOW); |
| 110 | + digitalWrite(pinA2, HIGH); |
| 111 | + Serial.println("Motor A, LOW-HIGH"); |
| 112 | +} |
| 113 | + |
| 114 | +//motor B contorls |
| 115 | +void motorBForward() |
| 116 | +{ |
| 117 | + digitalWrite(pinB1, HIGH); |
| 118 | + digitalWrite(pinB2, LOW); |
| 119 | + Serial.println("Motor B, HIGH-LOW"); |
| 120 | +} |
| 121 | + |
| 122 | +void motorBBackward() |
| 123 | +{ |
| 124 | + digitalWrite(pinB1, LOW); |
| 125 | + digitalWrite(pinB2, HIGH); |
| 126 | + Serial.println("Motor B, LOW-HIGH"); |
| 127 | +} |
| 128 | + |
| 129 | +//coasting and braking |
| 130 | +void motorACoast() |
| 131 | +{ |
| 132 | + digitalWrite(pinA1, LOW); |
| 133 | + digitalWrite(pinA2, LOW); |
| 134 | + Serial.println("Motor A, both LOW"); |
| 135 | +} |
| 136 | + |
| 137 | +void motorABrake() |
| 138 | +{ |
| 139 | + digitalWrite(pinA1, HIGH); |
| 140 | + digitalWrite(pinA2, HIGH); |
| 141 | + Serial.println("Motor A, both HIGH"); |
| 142 | +} |
| 143 | + |
| 144 | +void motorBCoast() |
| 145 | +{ |
| 146 | + digitalWrite(pinB1, LOW); |
| 147 | + digitalWrite(pinB2, LOW); |
| 148 | + Serial.println("Motor B, both LOW"); |
| 149 | +} |
| 150 | + |
| 151 | +void motorBBrake() |
| 152 | +{ |
| 153 | + digitalWrite(pinB1, HIGH); |
| 154 | + digitalWrite(pinB2, HIGH); |
| 155 | + Serial.println("Motor B, both HIGH"); |
| 156 | +} |
| 157 | + |
| 158 | +//Define High Level Commands |
| 159 | + |
| 160 | +void enableMotors() |
| 161 | +{ |
| 162 | + motorAOn(); |
| 163 | + motorBOn(); |
| 164 | +} |
| 165 | + |
| 166 | +void disableMotors() |
| 167 | +{ |
| 168 | + motorAOff(); |
| 169 | + motorBOff(); |
| 170 | +} |
| 171 | + |
| 172 | +void forward(int time) |
| 173 | +{ |
| 174 | + motorAForward(); |
| 175 | + motorBForward(); |
| 176 | + delay(time); |
| 177 | +} |
| 178 | + |
| 179 | +void backward(int time) |
| 180 | +{ |
| 181 | + motorABackward(); |
| 182 | + motorBBackward(); |
| 183 | + delay(time); |
| 184 | +} |
| 185 | + |
| 186 | +void turnLeft(int time) |
| 187 | +{ |
| 188 | + motorABackward(); |
| 189 | + motorBForward(); |
| 190 | + delay(time); |
| 191 | +} |
| 192 | + |
| 193 | +void turnRight(int time) |
| 194 | +{ |
| 195 | + motorAForward(); |
| 196 | + motorBBackward(); |
| 197 | + delay(time); |
| 198 | +} |
| 199 | + |
| 200 | +void coast(int time) |
| 201 | +{ |
| 202 | + motorACoast(); |
| 203 | + motorBCoast(); |
| 204 | + delay(time); |
| 205 | +} |
| 206 | + |
| 207 | +void brake(int time) |
| 208 | +{ |
| 209 | + motorABrake(); |
| 210 | + motorBBrake(); |
| 211 | + delay(time); |
| 212 | +} |
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