51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
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# NeoPixel driver for MicroPython
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# MIT license; Copyright (c) 2016 Damien P. George, 2021 Jim Mussared
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from machine import bitstream
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class NeoPixel:
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# G R B W
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ORDER = (1, 0, 2, 3)
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def __init__(self, pin, n, bpp=3, timing=1):
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self.pin = pin
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self.n = n
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self.bpp = bpp
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self.buf = bytearray(n * bpp)
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self.pin.init(pin.OUT)
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# Timing arg can either be 1 for 800kHz or 0 for 400kHz,
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# or a user-specified timing ns tuple (high_0, low_0, high_1, low_1).
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self.timing = (
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((400, 850, 800, 450) if timing else (800, 1700, 1600, 900))
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if isinstance(timing, int)
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else timing
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)
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def __len__(self):
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return self.n
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def __setitem__(self, i, v):
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offset = i * self.bpp
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for i in range(self.bpp):
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self.buf[offset + self.ORDER[i]] = v[i]
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def __getitem__(self, i):
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offset = i * self.bpp
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return tuple(self.buf[offset + self.ORDER[i]] for i in range(self.bpp))
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def fill(self, v):
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b = self.buf
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l = len(self.buf)
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bpp = self.bpp
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for i in range(bpp):
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c = v[i]
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j = self.ORDER[i]
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while j < l:
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b[j] = c
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j += bpp
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def write(self):
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# BITSTREAM_TYPE_HIGH_LOW = 0
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bitstream(self.pin, 0, self.timing, self.buf)
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