Fun with gyro

Here's a fun way to visualize live gyro data for the z axis - especially fun to roll the puck along a desk! Also fascinating to swing it around fast and film it in slow motion, shows a really nice fast response.

Gyro is quite power hungry so you can tap the puck to toggle it on and off.

let callbackCount = 0;
Puck.on('accel', function(a) {
  callbackCount++;
  if(a.gyro.z > 0) {
   analogWrite(LED1, a.gyro.z / 32764);
   analogWrite(LED2, 0);
  } else {
   analogWrite(LED1, 0);
   analogWrite(LED2, -a.gyro.z / 32764);
  }
});

let gyroOn = false;
function toggleGyro() {
  if(gyroOn) {
    Puck.accelOff();
    digitalWrite([LED1, LED2], 0);
  } else {
    Puck.accelOn(104);
    // Set max range to 2000 degrees per sec, 104 Hz
    Puck.accelWr(0x11, 76);
  }
  gyroOn = !gyroOn;
}

setWatch(toggleGyro, BTN, {edge:"rising", debounce:50, repeat:true});
digitalWrite([LED1, LED2], 0);

/*
let lastCount = 0;
setInterval(() => {
  let change = callbackCount - lastCount;
  print((change / 5).toFixed(1) + ' callbacks / sec');
  lastCount = callbackCount;
}, 5000);
*/

@Gordon - I did notice the callback seems to be called frequently (about 280 times / sec), regardless of the rate passed in to accelOn() - bug?