nevma_board.ino

#include <Keyboard.h>
#include <Mouse.h>
#include <SparkFun_APDS9960.h>

SparkFun_APDS9960 gestureSensor;
const unsigned short GESTURE_INT_PIN = 1;

volatile boolean hasMovement = false;

/**
   The main business logic. Translates gestures to keyboard events.
*/
void handleGesture() {
  if (gestureSensor.isGestureAvailable()) {
    switch (gestureSensor.readGesture()) {
      case DIR_UP:
        Keyboard.press(KEY_LEFT_ARROW);
        break;
      case DIR_DOWN:
        Keyboard.press(KEY_RIGHT_ARROW);
        break;
      case DIR_LEFT:
        Mouse.move(0, 0, -10);
        break;
      case DIR_RIGHT:
        Mouse.move(0, 0, 10);
        break;
      case DIR_NEAR:
        Keyboard.press(' ');
        break;
      case DIR_FAR:
        Keyboard.press(KEY_ESC);
        break;
      default:
        break;
    }
    Keyboard.releaseAll();
  }
}

/**
   Gets called whenever the gesture module signals there are new data to be sent
*/
void transmissionReady() {
  hasMovement = true;
}

/**
   Initializes gesture sensor
  @return whether gesture sensor initialization was successful
*/
boolean initializeGestureSensor() {
  return gestureSensor.init() && gestureSensor.enableGestureSensor(true);
}

void setup() {
  Keyboard.begin();
  Mouse.begin();
  attachInterrupt(digitalPinToInterrupt(GESTURE_INT_PIN), transmissionReady, FALLING);
  boolean initializationSuccessful = initializeGestureSensor();
  // If ADPS sensor failed to initialize, block and send error messages via Serial
  if (!initializationSuccessful) {
    Serial.begin(9600);
    while (!initializationSuccessful) {
      Serial.println("Error while initializing the gesture sensor");
      delay(10000);
    }
  }
}

void loop() {
  if (hasMovement) {
    handleGesture();
    hasMovement = false;
    // Reinitialize as workaround for sensor hanging when gesturing too fast
    initializeGestureSensor();
  }
}