kopia lustrzana https://github.com/pimoroni/pimoroni-pico
53 wiersze
1.4 KiB
Python
53 wiersze
1.4 KiB
Python
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import time
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from pimoroni_i2c import PimoroniI2C
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from breakout_encoder_wheel import BreakoutEncoderWheel, NUM_LEDS
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"""
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Displays a rotating rainbow pattern on Encoder Wheel's LED ring.
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Press Ctrl+C to stop the program.
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"""
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PINS_BREAKOUT_GARDEN = {"sda": 4, "scl": 5}
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PINS_PICO_EXPLORER = {"sda": 20, "scl": 21}
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# Constants
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SPEED = 5 # The speed that the LEDs will cycle at
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BRIGHTNESS = 1.0 # The brightness of the LEDs
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UPDATES = 50 # How many times the LEDs will be updated per second
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UPDATE_RATE = 1 / UPDATES
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# Create a new BreakoutEncoderWheel
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i2c = PimoroniI2C(**PINS_BREAKOUT_GARDEN)
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wheel = BreakoutEncoderWheel(i2c)
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# Variables
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offset = 0.0
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# Sleep until a specific time in the future. Use this instead of time.sleep() to correct for
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# inconsistent timings when dealing with complex operations or external communication
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def sleep_until(end_time):
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time_to_sleep = end_time - time.monotonic()
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if time_to_sleep > 0.0:
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time.sleep(time_to_sleep)
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# Make rainbows
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while True:
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# Record the start time of this loop
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start_time = time.monotonic()
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offset += SPEED / 1000.0
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# Update all the LEDs
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for i in range(NUM_LEDS):
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hue = float(i) / NUM_LEDS
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wheel.set_hsv(i, hue + offset, 1.0, BRIGHTNESS)
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wheel.show()
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# Sleep until the next update, accounting for how long the above operations took to perform
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sleep_until(start_time + UPDATE_RATE)
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