86 lines
2.2 KiB
Python
86 lines
2.2 KiB
Python
# SPDX-FileCopyrightText: 2021 Tod Kurt @todbot and John Park for Adafruit Industries
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# SPDX-License-Identifier: MIT
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# QT Py encoder based on https://github.com/todbot/qtpy-knob
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# Retroreflective chromakey light ring
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# Mount a rotary encoder directly to an Adafruit QT Py,
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# add some neopixels to get a color/brightness controller
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#
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import time
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import board
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from digitalio import DigitalInOut, Direction, Pull
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import neopixel
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import rotaryio
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dim_val = 0.2
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NUM_PIX = 24
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PIX_TYPE = "RGB" # RGB or RGBW
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if PIX_TYPE == "RGB":
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ORDER = (1, 0, 2)
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GREEN = (0, 255, 0)
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BLUE = (0, 0, 255)
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WHITE = (255, 255, 255)
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BLACK = (0, 0, 0)
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else:
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ORDER = (1, 0, 2, 3)
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GREEN = (0, 255, 0, 0)
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BLUE = (0, 0, 255, 0)
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WHITE = (0, 0, 0, 255)
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BLACK = (0, 0, 0, 0)
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colors = [GREEN, BLUE, WHITE, BLACK]
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current_color = 0
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ring = neopixel.NeoPixel(
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board.MISO, NUM_PIX, brightness=0.2, auto_write=False, pixel_order=ORDER
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)
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ring.fill(colors[current_color])
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ring.show()
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# button of rotary encoder
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button = DigitalInOut(board.MOSI)
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button.pull = Pull.UP
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# Use pin A2 as a fake ground for the rotary encoder
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fakegnd = DigitalInOut(board.A2)
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fakegnd.direction = Direction.OUTPUT
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fakegnd.value = False
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encoder = rotaryio.IncrementalEncoder(board.A3, board.A1)
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print("---Chromakey Light Ring---")
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last_encoder_val = encoder.position
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ring_pos = 0
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rainbow_pos = 0
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last_time = time.monotonic()
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ring_on = True
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while True:
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encoder_diff = last_encoder_val - encoder.position # encoder clicks since last read
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last_encoder_val = encoder.position
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if button.value is False: # button pressed
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current_color = (current_color + 1) % len(colors)
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ring.fill(colors[current_color])
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ring.show()
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time.sleep(0.5) # debounce
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else:
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if encoder_diff > 0:
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if dim_val >= 0.01:
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dim_val = (dim_val - 0.01) % 1.0
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ring.brightness = dim_val
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ring.show()
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elif encoder_diff < 0:
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if dim_val <= 0.99:
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dim_val = (dim_val + 0.01) % 1.0
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ring.brightness = dim_val
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ring.show()
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time.sleep(0.01)
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