46 lines
1.1 KiB
Python
46 lines
1.1 KiB
Python
import time
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from pimoroni import Button
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from plasma import WS2812
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from servo import servo2040
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"""
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Displays a rotating rainbow pattern on the Servo 2040's onboard LED bar.
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Press "Boot" to exit the program.
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NOTE: Plasma WS2812 uses the RP2040's PIO system, and as
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such may have problems when running code multiple times.
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If you encounter issues, try resetting your board.
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"""
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SPEED = 5 # The speed that the LEDs will cycle at
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BRIGHTNESS = 0.4 # 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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# Create the LED bar, using PIO 1 and State Machine 0
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led_bar = WS2812(servo2040.NUM_LEDS, 1, 0, servo2040.LED_DATA)
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# Create the user button
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user_sw = Button(servo2040.USER_SW)
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# Start updating the LED bar
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led_bar.start()
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offset = 0.0
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# Make rainbows until the user button is pressed
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while not user_sw.raw():
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offset += SPEED / 1000.0
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# Update all the LEDs
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for i in range(servo2040.NUM_LEDS):
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hue = float(i) / servo2040.NUM_LEDS
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led_bar.set_hsv(i, hue + offset, 1.0, BRIGHTNESS)
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time.sleep(1.0 / UPDATES)
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# Turn off the LED bar
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led_bar.clear()
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