1  # SPDX-FileCopyrightText: 2018 Dave Astels for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: MIT
 4  
 5  """
 6  Circuit Playground Express head-tilt activated ears.
 7  
 8  Adafruit invests time and resources providing this open source code.
 9  Please support Adafruit and open source hardware by purchasing
10  products from Adafruit!
11  
12  Written by Dave Astels for Adafruit Industries
13  Copyright (c) 2018 Adafruit Industries
14  Licensed under the MIT license.
15  
16  All text above must be included in any redistribution.
17  """
18  
19  import time
20  import busio
21  import board
22  import adafruit_lis3dh
23  import pwmio
24  from adafruit_motor import servo
25  
26  
27  # Setup accelerometer
28  i2c = busio.I2C(board.ACCELEROMETER_SCL, board.ACCELEROMETER_SDA)
29  sensor = adafruit_lis3dh.LIS3DH_I2C(i2c, address=0x19)
30  
31  # Setup servos
32  left_pwm = pwmio.PWMOut(board.A1, frequency=50)
33  right_pwm = pwmio.PWMOut(board.A2, frequency=50)
34  
35  left_ear = servo.Servo(left_pwm)
36  right_ear = servo.Servo(right_pwm)
37  
38  #initialize things
39  left_ear.angle = 0
40  right_ear.angle = 0
41  
42  while True:
43      x, _, _ = sensor.acceleration
44      if x < -5.0:
45          left_ear.angle = 90
46      elif x > 5.0:
47          right_ear.angle = 90
48      elif abs(x) < 4.0:
49          left_ear.angle = 0
50          right_ear.angle = 0
51      time.sleep(0.1)