1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
# NeoPixel driver for MicroPython
# MIT license; Copyright (c) 2016 Damien P. George, 2021 Jim Mussared
from micropython import const
from machine import bitstream
_BITSTREAM_TYPE_HIGH_LOW = const(0)
_TIMING_WS2818_800 = (400, 850, 800, 450)
_TIMING_WS2818_400 = (800, 1700, 1600, 900)
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_WS2818_800 if timing else _TIMING_WS2818_400)
if isinstance(timing, int)
else timing
)
def __len__(self):
return self.n
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):
bitstream(self.pin, _BITSTREAM_TYPE_HIGH_LOW, self.timing, self.buf)
|
