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Crickits/ghost_slime/code.py

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+from digitalio import DigitalInOut, Direction, Pull
+from adafruit_seesaw.seesaw import Seesaw
+from adafruit_seesaw.analoginput import AnalogInput
+from adafruit_seesaw.pwmout import PWMOut
+from adafruit_motor import motor
+from busio import I2C
+import neopixel
+import audioio
+import board
+import time
+
+# Create seesaw object
+i2c = I2C(board.SCL, board.SDA)
+seesaw = Seesaw(i2c)
+
+# built in CPX button A
+button = DigitalInOut(board.BUTTON_A)
+button.direction = Direction.INPUT
+button.pull = Pull.DOWN
+
+# NeoPixels
+pixels = neopixel.NeoPixel(board.A1, 10, brightness=0)
+pixels.fill((0,0,250))
+
+# Analog reading from Signal #1 (ss. #2)
+foot_pedal = AnalogInput(seesaw, 2)
+
+# Create one motor on seesaw PWM pins 22 & 23
+motor_a = motor.DCMotor(PWMOut(seesaw, 22), PWMOut(seesaw, 23))
+motor_a.throttle = 0
+
+def map_range(x, in_min, in_max, out_min, out_max):
+    # Maps a number from one range to another.
+    mapped = (x-in_min) * (out_max - out_min) / (in_max-in_min) + out_min
+    if out_min <= out_max:
+        return max(min(mapped, out_max), out_min)
+    return min(max(mapped, out_max), out_min)
+
+# Get the audio file ready
+wavfile = "unchained.wav"
+f = open(wavfile, "rb")
+wav = audioio.WaveFile(f)
+a = audioio.AudioOut(board.A0)
+
+time_to_play = 0  # when to start playing
+played = False  # have we played audio already? only play once!
+while True:
+    # Foot pedal ranges from about 700 (unpressed) to 50 (pressed)
+    # make that change the speed of the motor from 0 (stopped) to 0.5 (half)
+    press = foot_pedal.value
+    speed = map_range(press, 700, 50, 0, 0.5)
+    print("%d -> %0.3f" % (press, speed))
+    motor_a.throttle = speed
+
+    if not time_to_play and speed > 0.1:
+        print("Start audio in 3 seconds")
+        time_to_play = time.monotonic() + 3
+    elif time_to_play and time.monotonic() > time_to_play and not played:
+        print("Playing audio")
+        a.play(wav)
+        played = True
+
+    # turn on/off blue LEDs
+    if button.value:
+        if pixels.brightness < 0.1:
+            pixels.brightness = 1
+        else:
+            pixels.brightness = 0
+        time.sleep(0.5)
+
+    # loop delay
+    time.sleep(0.1)