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deshipudpgeorge
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esp8266/scripts: Make neopixel/apa102 handle 4bpp LEDs with common code.
The NeoPixel class now handles 4 bytes-per-pixel LEDs (extra byte is intensity) and arbitrary byte ordering. APA102 class is now derived from NeoPixel to reduce code size and support fill() operation.
1 parent f1b2b1b commit 984a867

2 files changed

Lines changed: 22 additions & 32 deletions

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esp8266/scripts/apa102.py

Lines changed: 8 additions & 19 deletions
Original file line numberDiff line numberDiff line change
@@ -2,27 +2,16 @@
22
# MIT license; Copyright (c) 2016 Robert Foss, Daniel Busch
33

44
from esp import apa102_write
5+
from neopixel import NeoPixel
56

6-
class APA102:
7-
def __init__(self, clock_pin, data_pin, n):
8-
self.clock_pin = clock_pin
9-
self.data_pin = data_pin
10-
self.n = n
11-
self.buf = bytearray(n * 4)
12-
13-
self.clock_pin.init(clock_pin.OUT)
14-
self.data_pin.init(data_pin.OUT)
157

16-
def __setitem__(self, index, val):
17-
r, g, b, brightness = val
18-
self.buf[index * 4] = r
19-
self.buf[index * 4 + 1] = g
20-
self.buf[index * 4 + 2] = b
21-
self.buf[index * 4 + 3] = brightness
8+
class APA102(NeoPixel):
9+
ORDER = (0, 1, 2, 3)
2210

23-
def __getitem__(self, index):
24-
i = index * 4
25-
return self.buf[i], self.buf[i + 1], self.buf[i + 2], self.buf[i + 3]
11+
def __init__(self, clock_pin, data_pin, n, bpp=4):
12+
super().__init__(data_pin, n, bpp)
13+
self.clock_pin = clock_pin
14+
self.clock_pin.init(clock_pin.OUT)
2615

2716
def write(self):
28-
apa102_write(self.clock_pin, self.data_pin, self.buf)
17+
apa102_write(self.clock_pin, self.pin, self.buf)

esp8266/scripts/neopixel.py

Lines changed: 14 additions & 13 deletions
Original file line numberDiff line numberDiff line change
@@ -3,29 +3,30 @@
33

44
from esp import neopixel_write
55

6+
67
class NeoPixel:
7-
def __init__(self, pin, n):
8+
ORDER = (1, 0, 2, 3)
9+
10+
def __init__(self, pin, n, bpp=3):
811
self.pin = pin
912
self.n = n
10-
self.buf = bytearray(n * 3)
13+
self.bpp = bpp
14+
self.buf = bytearray(n * bpp)
1115
self.pin.init(pin.OUT)
1216

1317
def __setitem__(self, index, val):
14-
r, g, b = val
15-
self.buf[index * 3] = g
16-
self.buf[index * 3 + 1] = r
17-
self.buf[index * 3 + 2] = b
18+
offset = index * self.bpp
19+
for i in range(self.bpp):
20+
self.buf[offset + self.ORDER[i]] = val[i]
1821

1922
def __getitem__(self, index):
20-
i = index * 3
21-
return self.buf[i + 1], self.buf[i], self.buf[i + 2]
23+
offset = index * self.bpp
24+
return tuple(self.buf[offset + self.ORDER[i]]
25+
for i in range(self.bpp))
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2327
def fill(self, color):
24-
r, g, b = color
25-
for i in range(len(self.buf) / 3):
26-
self.buf[i * 3] = g
27-
self.buf[i * 3 + 1] = r
28-
self.buf[i * 3 + 2] = b
28+
for i in range(self.n):
29+
self[i] = color
2930

3031
def write(self):
3132
neopixel_write(self.pin, self.buf, True)

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