77 lines
2.2 KiB
Python
77 lines
2.2 KiB
Python
# SPDX-FileCopyrightText: 2018 Limor Fried for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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import time
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from digitalio import DigitalInOut, Direction, Pull
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from adafruit_seesaw.seesaw import Seesaw
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from adafruit_seesaw.analoginput import AnalogInput
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from adafruit_seesaw.pwmout import PWMOut
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from adafruit_motor import motor
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from busio import I2C
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import neopixel
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import audioio
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import audiocore
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import board
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# Create seesaw object
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i2c = I2C(board.SCL, board.SDA)
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seesaw = Seesaw(i2c)
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# built in CPX button A
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button = DigitalInOut(board.BUTTON_A)
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button.direction = Direction.INPUT
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button.pull = Pull.DOWN
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# NeoPixels
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pixels = neopixel.NeoPixel(board.A1, 10, brightness=0)
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pixels.fill((0,0,250))
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# Analog reading from Signal #1 (ss. #2)
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foot_pedal = AnalogInput(seesaw, 2)
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# Create one motor on seesaw PWM pins 22 & 23
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motor_a = motor.DCMotor(PWMOut(seesaw, 22), PWMOut(seesaw, 23))
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motor_a.throttle = 0
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def map_range(x, in_min, in_max, out_min, out_max):
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# Maps a number from one range to another.
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mapped = (x-in_min) * (out_max - out_min) / (in_max-in_min) + out_min
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if out_min <= out_max:
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return max(min(mapped, out_max), out_min)
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return min(max(mapped, out_max), out_min)
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# Get the audio file ready
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wavfile = "unchained.wav"
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f = open(wavfile, "rb")
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wav = audiocore.WaveFile(f)
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a = audioio.AudioOut(board.A0)
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time_to_play = 0 # when to start playing
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played = False # have we played audio already? only play once!
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while True:
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# Foot pedal ranges from about 700 (unpressed) to 50 (pressed)
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# make that change the speed of the motor from 0 (stopped) to 0.5 (half)
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press = foot_pedal.value
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speed = map_range(press, 700, 50, 0, 0.5)
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print("%d -> %0.3f" % (press, speed))
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motor_a.throttle = speed
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if not time_to_play and speed > 0.1:
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print("Start audio in 3 seconds")
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time_to_play = time.monotonic() + 3
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elif time_to_play and time.monotonic() > time_to_play and not played:
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print("Playing audio")
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a.play(wav)
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played = True
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# turn on/off blue LEDs
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if button.value:
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if pixels.brightness < 0.1:
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pixels.brightness = 1
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else:
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pixels.brightness = 0
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time.sleep(0.5)
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# loop delay
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time.sleep(0.1)
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