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# NeoPixel driver for MicroPython on ESP32
# MIT license; Copyright (c) 2016 Damien P. George
from esp import neopixel_write
class NeoPixel:
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)
self.timing = timing
def __setitem__(self, index, val):
offset = index * self.bpp
for i in range(self.bpp):
self.buf[offset + self.ORDER[i]] = val[i]
def __getitem__(self, index):
offset = index * self.bpp
return tuple(self.buf[offset + self.ORDER[i]] for i in range(self.bpp))
def fill(self, color):
for i in range(self.n):
self[i] = color
def write(self):
neopixel_write(self.pin, self.buf, self.timing)
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