Jimmy
98fa4260d4
Mirror bundled-lib/ by keeping manifest.json at the bundle root and shipping sample .py files from a demo/ subdirectory. Co-authored-by: Cursor <cursoragent@cursor.com>
48 lines
1.1 KiB
Python
48 lines
1.1 KiB
Python
"""Rainbow NeoPixel sweep — self-contained (stdlib + simulated hardware only)."""
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import time
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from machine import Pin
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import neopixel
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# --- helpers (same logic as bundled led_patterns.py, inlined here)
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def _clamp(channel: int) -> int:
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return max(0, min(255, int(channel)))
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def wheel(pos: int):
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"""Return rainbow RGB at position 0–255."""
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pos = 255 - (pos & 255)
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if pos < 85:
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return (_clamp(255 - pos * 3), 0, _clamp(pos * 3))
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if pos < 170:
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pos -= 85
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return (0, _clamp(pos * 3), _clamp(255 - pos * 3))
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pos -= 170
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return (_clamp(pos * 3), _clamp(255 - pos * 3), 0)
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def rainbow_frame(led_count: int, frame: int, step: int = 4):
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if led_count <= 0:
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return []
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return [wheel((i * 256 // led_count + frame * step) & 255) for i in range(led_count)]
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# --- demo
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NUM_LEDS = 16
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np = neopixel.NeoPixel(Pin(4), NUM_LEDS)
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for frame in range(120):
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frame_colors = rainbow_frame(len(np), frame, step=5)
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for i, color in enumerate(frame_colors):
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np[i] = color
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np.write()
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time.sleep(0.05)
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np.fill((0, 0, 0))
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np.write()
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