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• Rock, Paper, Scissors!

  Chad Lawson • 02/21/2017 at 00:39 • 0 comments

  After spending a lot of time with the accelerometer sample code in Arduino and mapping my movements to a CSV, I wrote some code to handle the RPS when the arm is moved in the normal "throwing chops" motion.

  #include <Wire.h>
  #include <Adafruit_MMA8451.h>
  #include <Adafruit_Sensor.h>
  
  #define TIMEUPDOWN  150
  #define TIMEBETWEEN 800
  #define THRESHDOWN  -8000
  #define THRESHUP    8000
  
  Adafruit_MMA8451 mma = Adafruit_MMA8451();
  int fistPumpCount = 0;
  int lastUp = 0;
  int lastDown = 0;
  
  void setup(void) {
    Serial.begin(9600);
    
    Serial.println("Let's throw chops!");
    
    if (! mma.begin()) {
      //Serial.println("Couldnt start");
      while (1);
    }
    //Serial.println("MMA8451 found!");
    
    mma.setRange(MMA8451_RANGE_2_G);
    
  }
  
  void loop() {
    unsigned long timeStamp = millis();  
  
    mma.read();
    int fistPump = mma.y;
  
    if(fistPump > THRESHUP) {
      
      int timeDiff = timeStamp - lastUp;
      if( timeDiff > TIMEUPDOWN ) {
        lastUp = timeStamp;
        if( timeDiff < TIMEBETWEEN ) {
          fistPumpCount++;
        } else {
          fistPumpCount = 1;
        }
        Serial.print("Pump Up: ");
        Serial.print(fistPumpCount);
        Serial.println();
      }
    }
  
    if(fistPumpCount == 3) {
      randomSeed(timeStamp);
      int roshambo = random(1,4); // Stupid exclusive bit
      switch(roshambo) {
        case 1:
          Serial.println("Rock");
          break;
        case 2:
          Serial.println("Paper");
          break;
        case 3:
          Serial.println("Scissors");
          break;
      }
      fistPumpCount = 0;
    }
  }

  
  

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