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