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diff --git a/libraries/Robot_Control/examples/explore/R07_Runaway_Robot/R07_Runaway_Robot.ino b/libraries/Robot_Control/examples/explore/R07_Runaway_Robot/R07_Runaway_Robot.ino
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-/* Runaway Robot
-
- Play tag with your robot! With an ultrasonic
- distance sensor, it's capable of detecting and avoiding
- obstacles, never bumping into walls again!
-
- You'll need to attach an untrasonic range finder to TK1.
-
- Circuit:
- * Arduino Robot
- * US range finder like Maxbotix EZ10, with analog output
-
- created 1 May 2013
- by X. Yang
- modified 12 May 2013
- by D. Cuartielles
-
- This example is in the public domain
- */
-
-// include the robot library
-#include <ArduinoRobot.h>
-
-int sensorPin = TK1; // pin is used by the sensor
-
-void setup() {
- // initialize the Robot, SD card, and display
- Serial.begin(9600);
- Robot.begin();
- Robot.beginTFT();
- Robot.beginSD();
- Robot.displayLogos();
-
- // draw a face on the LCD screen
- setFace(true);
-}
-
-void loop() {
- // If the robot is blocked, turn until free
- while(getDistance() < 40) { // If an obstacle is less than 20cm away
- setFace(false); //shows an unhappy face
- Robot.motorsStop(); // stop the motors
- delay(1000); // wait for a moment
- Robot.turn(90); // turn to the right and try again
- setFace(true); // happy face
- }
- // if there are no objects in the way, keep moving
- Robot.motorsWrite(255, 255);
- delay(100);
-}
-
-// return the distance in cm
-float getDistance() {
- // read the value from the sensor
- int sensorValue = Robot.analogRead(sensorPin);
- //Convert the sensor input to cm.
- float distance_cm = sensorValue*1.27;
- return distance_cm;
-}
-
-// make a happy or sad face
-void setFace(boolean onOff) {
- if(onOff) {
- // if true show a happy face
- Robot.background(0, 0, 255);
- Robot.setCursor(44, 60);
- Robot.stroke(0, 255, 0);
- Robot.setTextSize(4);
- Robot.print(":)");
- }else{
- // if false show an upset face
- Robot.background(255, 0, 0);
- Robot.setCursor(44, 60);
- Robot.stroke(0, 255, 0);
- Robot.setTextSize(4);
- Robot.print("X(");
- }
-}