def turn_lights_off(strip: ws.PixelStrip, runtime: float = RUNTIME):
print(f"Turning the lights off over {runtime}s")
weather = get_weather()
WEATHER_ANIMATIONS[weather](strip, runtime, reverse=True)
for i in range(strip.numPixels()):
strip.setPixelColor(i, ws.Color(0, 0, 0))
strip.show()
class WS2812(Driver):
"""
Legacy driver. Passes through calls to some other driver.
"""
def __init__(self, width, height, serpentine=False, name=None):
self.serpentine = serpentine
super().__init__(np.zeros((height, width, 3), dtype=np.uint8),
8,
name=name)
self.pixelstrip = PixelStrip(self.height * self.width, LED_PIN,
LED_FREQ_HZ, LED_DMA, LED_INVERT,
LED_BRIGHTNESS, LED_CHANNEL, LED_GAMMA)
def __enter__(self):
self.pixelstrip.begin()
return super().__enter__()
def show(self):
if self.serpentine:
# TODO: handle serpentine, but i don't have hardware to test :(
outbuf = self.rawbuf
else:
outbuf = self.rawbuf
outbuf = outbuf.reshape(self.width * self.height, 3)
for i in range(outbuf.shape[0]):
self.pixelstrip.setPixelColorRGB(i, *outbuf[i].tolist()) # ugh
self.pixelstrip.show()
super().show()
class LED:
def __init__(self):
# LED Strip configuration:
# Number of LED pixels
LED_COUNT = 4
# GPIO pin connected to the pixels (10 uses SPI /dev/spidev0.0)
LED_PIN = 10
# LED signal frequency in hertz (usually 800khz)
LED_FREQ_HZ = 800000
# DMA channel to use for generating signal (try 10)
LED_DMA = 10
# Set to 0 for darkest and 255 for brightest
LED_BRIGHTNESS = 100
# True to invert the signal (when using NPN transistor level shift)
LED_INVERT = False
# set to '1' for GPIOs 13. 19, 41, 45 or 53
LED_CHANNEL = 0
# Create NeoPixel object with appropriate configuration.
self.strip = PixelStrip(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
# Intialize the library (must be called once before other functions).
self.strip.begin()
def set_color(self, led, red, green, blue):
self.strip.setPixelColor(led, Color(red, green, blue))
self.strip.show()
class PlasmaWS281X(Plasma):
def __init__(self,
light_count,
gpio_pin=13,
strip_type='WS2812',
channel=1,
brightness=255,
freq_hz=800000,
dma=10,
invert=False):
from rpi_ws281x import PixelStrip, ws
strip_types = {}
for t in ws.__dict__:
if '_STRIP' in t:
k = t.replace('_STRIP', '')
v = getattr(ws, t)
strip_types[k] = v
strip_type = strip_types[strip_type]
self._strip = PixelStrip(light_count, gpio_pin, freq_hz, dma, invert,
brightness, channel, strip_type)
self._strip.begin()
Plasma.__init__(self, light_count)
def show(self):
"""Output the buffer."""
for i in range(self._strip.numPixels()):
r, g, b, brightness = self._pixels[i]
self._strip.setPixelColorRGB(i, r, g, b)
self._strip.show()
class WS2812(Driver):
"""
Legacy driver. Passes through calls to some other driver.
"""
def __init__(self, width, height, led_pin=18, map=None, name=None):
self.map = map
if self.map is None:
n_leds = self.height * self.width
else:
n_leds = len(self.map)
super().__init__(np.zeros((height, width, 3), dtype=np.uint8), 8, name=name)
self.pixelstrip = PixelStrip(n_leds, led_pin, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL, LED_GAMMA)
def __enter__(self):
self.pixelstrip.begin()
return super().__enter__()
def show(self):
if self.map is not None:
outbuf = self.rawbuf[self.map]
else:
outbuf = self.rawbuf
outbuf = outbuf.reshape(-1, 3)
for i in range(outbuf.shape[0]):
self.pixelstrip.setPixelColorRGB(i, *outbuf[i].tolist()) # ugh
self.pixelstrip.show()
super().show()
class PlasmaWS281X(Plasma):
"""Class for Plasma light devices in the WS281X/SK6812 family."""
name = "WS281X"
options = {
'pixel_count': int,
"gpio_pin": int,
"strip_type": str,
"channel": int,
"brightness": int,
"freq_hz": int,
"dma": int,
"invert": bool
}
option_order = ("gpio_pin", "strip_type", "channel", "brightness", "freq_hz", "dma", "invert")
def __init__(self, pixel_count=1, gpio_pin=13, strip_type='WS2812', channel=None, brightness=255, freq_hz=800000, dma=10, invert=False):
"""Initialise WS281X device.
:param pixel_count: Number of individual RGB LEDs
:param gpio_pin: BCM GPIO pin for output signal
:param strip_type: Strip type: one of WS2812 or SK6812
:param channel: LED channel (0 or 1, or None for automatic)
:param brightness: Global WS281X LED brightness scale
:param freq_hz: WS281X output signal frequency (usually 800khz)
:param dma: DMA channel
:param invert: Invert signals for NPN-transistor based level shifters
"""
from rpi_ws281x import PixelStrip, ws
strip_types = {}
for t in ws.__dict__:
if '_STRIP' in t:
k = t.replace('_STRIP', '')
v = getattr(ws, t)
strip_types[k] = v
strip_type = strip_types[strip_type]
if channel is None:
if gpio_pin in [13]:
channel = 1
elif gpio_pin in [12, 18]:
channel = 0
self._strip = PixelStrip(pixel_count, gpio_pin, freq_hz, dma, invert, brightness, channel, strip_type)
self._strip.begin()
Plasma.__init__(self, pixel_count)
def show(self):
"""Output the buffer."""
for i in range(self._strip.numPixels()):
r, g, b, brightness = self._pixels[i]
self._strip.setPixelColorRGB(i, r, g, b)
self._strip.show()
def clear_strip(strip: PixelStrip):
"""Turn all lights off instantly.
:return:
"""
for i in range(strip.numPixels()):
strip.setPixelColor(i, color(0, 0, 0))
strip.show()
def dither_fade(
strip: ws.PixelStrip,
new_color: Union[ws.Color, np.array],
leds_to_switch: Optional[Iterable[int]] = None,
dither_time: float = 1,
):
"""
Dither in to a new set of colours by switching small batches of pixels.
Parameters
---------
strip
the LED strip to animate
new_color
Either a single ws.Color or an array of them. Providing one colour acts as an array of that one colour.
leds_to_switch
Only dither these LEDs to leave specific elements static.
dither_time
the time over which to dither. Do not make this too short
"""
try:
iter(new_color)
except TypeError:
# this is not iterable, therefore it is one colour.
# Make an array of that colour.
new_color = np.array([new_color for _ in range(strip.numPixels())])
start_time = time.time()
if leds_to_switch is None:
leds_to_switch = [i for i in range(strip.numPixels())]
random.shuffle(leds_to_switch)
num_leds = len(leds_to_switch)
# As a rough rule of thumb, it takes 0.005 seconds to switch an LED and render an
# update. Calculate the group size dynamically to fit into our time budget.
min_update_time = 0.005
switches_in_time = int(round(dither_time / min_update_time))
batch_size = int(round((strip.numPixels() / switches_in_time) + 0.5))
if batch_size != 1:
num_batches = int(round((strip.numPixels() / batch_size)))
batch_size = int(round((strip.numPixels() / num_batches)))
while leds_to_switch:
these_leds = [leds_to_switch.pop() for _ in range(batch_size) if leds_to_switch]
for this_led in these_leds:
strip.setPixelColor(this_led, new_color[this_led])
time.sleep(dither_time / (batch_size * num_leds))
strip.show()
# Sometimes we go too fast with the switching, as
# the batching approximation is horrible. If we
# do, just chill here before moving on
end_time = time.time()
time_diff = end_time - start_time
if time_diff < dither_time:
time.sleep(dither_time - time_diff)
class Solid:
def __init__(self):
self.strip = PixelStrip(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA,
LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
self.strip.begin()
def start(self):
for i in range(300):
self.strip.setPixelColor(i, Color(255, 255, 255))
self.strip.show()
def color_wipe(strip: ws.PixelStrip, color: ws.Color, wait_ms: float = 50.0):
"""
Wipe color across display a pixel at a time.
:param strip: the strip to animate
:param color: the color to set each pixel to
:param wait_ms: the time between animating each pixel, in milliseconds
"""
for i in range(strip.numPixels()):
strip.setPixelColor(i, color)
strip.show()
time.sleep(wait_ms / 1000.0)
def alternate_colors(strip: ws.PixelStrip, colors: Optional[Iterable[ws.Color]] = None):
"""
Show a set of colours along the strip.
:param strip: the strip to show the colors on
:param colors: a list of colors to show
"""
if colors is None:
colors = [ws.Color(255, 0, 0), ws.Color(0, 255, 0), ws.Color(0, 0, 255)]
for i in range(strip.numPixels()):
strip.setPixelColor(i, colors[i % len(colors)])
strip.show()
def color_wipe(strip: PixelStrip, color: color, wait_ms: int = 50):
"""Wipe color across display a pixel at a time.
:param strip: PixelStrip object to apply the effect to
:param color: Color to wipe
:param wait_ms: blocking time to wait (in ms) before returning
:return:
"""
for i in range(strip.numPixels()):
strip.setPixelColor(i, color)
strip.show()
time.sleep(wait_ms / 1000.0)
class NeoPixel(object):
"""
Hanlder fot the rapberrypi and led control
"""
def __init__(self, pixels):
# the imports must be hidden since they won't work on pc
from rpi_ws281x import PixelStrip
# init the pixel strip
self.np = PixelStrip(pixels, 18, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
self.np.begin()
self.pixel_count = pixels
def set(self, index, a, b, g, r):
"""
Set the a pixel color
:param index: int, the pixel index
:param a: int, the alpha value, add for compatibility
:param b: int, blue value
:param g: int, green value
:param r: int, red value
:return:
"""
from rpi_ws281x import Color
try:
# create color and set it
color = Color(r, g, b)
self.np.setPixelColor(index, color)
except IndexError:
print("error")
def send(self):
"""
Show the colors
:return:
"""
self.np.show()
def close(self):
"""
Set the strip to black and disconnect
:return:
"""
from rpi_ws281x import Color
c = Color(0, 0, 0)
for idx in range(self.pixel_count):
self.np.setPixelColor(idx, c)
self.np.show()
self.np._cleanup()
print("Closing PiHandler")
def rainbow(strip: ws.PixelStrip, wait_ms: float = 20.0, iterations: int = 1):
"""
Draw rainbow that fades across all pixels at once.
:param strip: the strip to animate
:param wait_ms: the time between each fading step
:param iterations: the number of times to play this animation
"""
for j in range(256 * iterations):
for i in range(strip.numPixels()):
strip.setPixelColor(i, get_rainbow_color((i + j) & 255))
strip.show()
time.sleep(wait_ms / 1000.0)
def rainbow(strip: PixelStrip, wait_ms: int = 20, iterations: int = 1):
"""Draw rainbow that fades across all pixels at once.
:param strip:
:param wait_ms:
:param iterations:
:return:
"""
for j in range(256 * iterations):
for i in range(strip.numPixels()):
strip.setPixelColor(i, wheel((i + j) & 255))
strip.show()
time.sleep(wait_ms / 1000.0)
def main():
parser = argparse.ArgumentParser(
description='Project an image onto a LED matrix.')
parser.add_argument('filename',
type=str,
help='filename of the image to display')
parser.add_argument('boardsize',
type=int,
help='the width and height of the LED matrix')
parser.add_argument('gpionum', type=int, help='the target GPIO pin')
parser.add_argument('--verbose',
'-v',
action='store_true',
help='enables verbose output')
args = parser.parse_args()
global VERBOSE
VERBOSE = args.verbose
try:
from rpi_ws281x import PixelStrip
except ImportError:
class PixelStrip():
"""PixelStrip stub."""
def __init__(self, *args, **kwargs):
print(
"rpi_ws281x not found - this won't actually draw anything."
)
def begin(self):
pass
def setPixelColorRGB(self, *args):
pass
def show(self):
print("Done mock drawing.")
np = PixelStrip(args.boardsize**2, args.gpionum, brightness=LED_INTENSITY)
np.begin()
my_grid = led_grid.LEDGrid(np, grid.SerpentinePattern.TOP_RIGHT,
args.boardsize, args.boardsize)
image = process_image(args.filename, args.boardsize)
draw_led_matrix(my_grid, image)
np.show()
try:
terminal_output.print_led_grid(my_grid)
except:
traceback.print_exc()
def rainbow_cycle(strip: PixelStrip, wait_ms: int = 20, iterations: int = 5):
"""Draw rainbow that uniformly distributes itself across all pixels.
:param strip:
:param wait_ms:
:param iterations:
:return:
"""
for j in range(256 * iterations):
for i in range(strip.numPixels()):
strip.setPixelColor(
i, wheel((int(i * 256 / strip.numPixels()) + j) & 255))
strip.show()
time.sleep(wait_ms / 1000.0)
class Light(Thread):
def __init__(self, light_state:LightState):
super().__init__()
self.state = light_state
self.periodic = None
self.refresh_period_or_duty_cycle()
self.strip = PixelStrip(self.state.get_num_pixels(), 18)
async def loop(self):
while True:
await self.periodic.wait_for_period_boundary()
self.set_first_half_of_period()
await self.periodic.wait_for_semi_period_boundary()
self.set_second_half_of_period()
def set_first_half_of_period(self):
if not self.state.get_power():
self.set_off()
else:
self.set_on()
def set_second_half_of_period(self):
if not self.state.get_power() or self.state.get_blink():
self.set_off()
else:
self.set_on()
def set_on(self):
self.strip.setBrightness(self.state.get_brightness())
for pixel in range(self.state.get_num_pixels()):
self.strip.setPixelColorRGB(pixel, self.state.get_red(), self.state.get_green(), self.state.get_blue())
self.strip.show()
def set_off(self):
for pixel in range(self.state.get_num_pixels()):
self.strip.setPixelColorRGB(pixel, 0, 0, 0)
self.strip.show()
def refresh_period_or_duty_cycle(self):
self.periodic = Periodic(
period_sec=self.state.get_period(),
semi_period_percent=self.state.get_duty_cycle()
)
def run(self):
self.strip.begin()
asyncio.run(self.loop())
def set_color(self, color):
rgb = int(color, 16)
r = int(rgb / 256 / 256)
rgb = rgb - r * 256 * 256
g = int(rgb / 256)
b = rgb - g * 256
# Create NeoPixel object with appropriate configuration.
strip = PixelStrip(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA,
LED_INVERT, LED_BRIGHTNESS)
# Intialize the library (must be called once before other functions).
strip.begin()
for i in range(0, strip.numPixels(), 1):
strip.setPixelColor(i, Color(g, r, b))
strip.show()
def theater_chase_rainbow(strip: PixelStrip, wait_ms: int = 50):
"""Rainbow movie theater light style chaser animation.
:param strip:
:param wait_ms:
:return:
"""
for j in range(256):
for q in range(3):
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i + q, wheel((i + j) % 255))
strip.show()
time.sleep(wait_ms / 1000.0)
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i + q, 0)
class Fade:
def __init__(self):
self.gammaTable = [
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4,
5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 11, 11, 11,
12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19,
20, 21, 21, 22, 22, 23, 23, 24, 25, 25, 26, 27, 27, 28, 29, 29, 30,
31, 31, 32, 33, 34, 34, 35, 36, 37, 37, 38, 39, 40, 40, 41, 42, 43,
44, 45, 46, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 76, 77,
78, 79, 80, 81, 83, 84, 85, 86, 88, 89, 90, 91, 93, 94, 95, 96, 98,
99, 100, 102, 103, 104, 106, 107, 109, 110, 111, 113, 114, 116,
117, 119, 120, 121, 123, 124, 126, 128, 129, 131, 132, 134, 135,
137, 138, 140, 142, 143, 145, 146, 148, 150, 151, 153, 155, 157,
158, 160, 162, 163, 165, 167, 169, 170, 172, 174, 176, 178, 179,
181, 183, 185, 187, 189, 191, 193, 194, 196, 198, 200, 202, 204,
206, 208, 210, 212, 214, 216, 218, 220, 222, 224, 227, 229, 231,
233, 235, 237, 239, 241, 244, 246, 248, 250, 252, 255
]
self.strip = PixelStrip(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA,
LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
self.strip.begin()
self.cols = []
self.hues = np.arange(360, step=10)
for i in range(36):
self.cols.append(hsv2rgb(self.hues[i] / 360, 1, 1))
def start(self):
while True:
for col in self.cols:
for i in range(100):
b = i * (1 / 100)
color = Color(self.gammaTable[int(col[0] * b)],
self.gammaTable[int(col[1] * b)],
self.gammaTable[int(col[2] * b)])
for j in range(LED_COUNT):
self.strip.setPixelColor(j, color)
self.strip.show()
for i in range(100, 0, -1):
b = i * (1 / 100)
color = Color(self.gammaTable[int(col[0] * b)],
self.gammaTable[int(col[1] * b)],
self.gammaTable[int(col[2] * b)])
for j in range(LED_COUNT):
self.strip.setPixelColor(j, color)
self.strip.show()
class Quicksort:
def partition(self, arr, start, end):
pivot = arr[end]
i = start
for j in range(start, end):
if arr[j] <= arr[
end]: # if arr[j] is less than arr[i] we swap the values
arr[i], arr[j] = arr[j], arr[i]
# cols = hueToRgb(arr)
col = hsv2rgb(arr[j] / 360, 1, 1)
col2 = hsv2rgb(arr[i] / 360, 1, 1)
self.strip.setPixelColor(j, Color(col[0], col[1], col[2]))
self.strip.show()
self.strip.setPixelColor(i, Color(col2[0], col2[1], col2[2]))
i = i + 1
self.strip.show()
arr[i], arr[end] = arr[end], arr[i]
col = hsv2rgb(arr[i] / 360, 1, 1)
col2 = hsv2rgb(arr[end] / 360, 1, 1)
self.strip.setPixelColor(i, Color(col[0], col[1], col[2]))
self.strip.show()
self.strip.setPixelColor(end, Color(col2[0], col2[1], col2[2]))
self.strip.show()
return i
def quicksort(self, arr, start, end):
if start < end:
index = self.partition(arr, start, end)
self.quicksort(arr, start, index - 1)
self.quicksort(arr, index + 1, end)
def __init__(self):
self.strip = PixelStrip(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA,
LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
self.strip.begin()
def start(self):
while True:
hues = np.arange(300)
random.shuffle(hues)
cols = hueToRgb(hues)
for k in range(300):
color = Color(cols[k][0], cols[k][1], cols[k][2])
self.strip.setPixelColor(k, color)
self.strip.show()
self.quicksort(hues, 0, len(hues) - 1)
def run():
prev_animation = None
prev_brightness = None
strip = PixelStrip(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT,
LED_BRIGHTNESS, LED_CHANNEL, LED_STRIP)
strip.begin()
threading.Thread(target=app.run).start()
print('Press Ctrl-C to quit.')
len_animations = None
try:
while True:
if len(curr_animations) != len_animations:
len_animations = len(curr_animations)
clear(strip)
generators = []
for animation in curr_animations:
generators.append(animation(VStrip(strip)))
if curr_brightness != prev_brightness:
strip.setBrightness(curr_brightness)
prev_brightness = curr_brightness
vstrips = []
for gen in generators:
vstrips.append(next(gen))
# vstrip.reverse()
for pos in range(strip.numPixels()):
col = np.array([0., 0., 0.])
transparency = 1
for v in vstrips:
cur_col = np.array(v.getPixelColor(pos))
col += cur_col[:3] * transparency
transparency *= cur_col[3]
col = np.maximum(
np.minimum(np.array(np.floor(col), dtype=np.int), 255), 0)
strip.setPixelColor(pos, Color(*col.tolist()))
strip.show()
except KeyboardInterrupt:
clear(strip)
def theater_chase(
strip: ws.PixelStrip, color: ws.Color, wait_ms: float = 50.0, iterations: int = 10
):
"""
Movie theater light style chaser animation.
:param strip: the strip to animate
:param color: the color to set each pixel to
:param wait_ms: the time between animating each pixel, in milliseconds
:param iterations: the number of times this animation will play
"""
for j in range(iterations):
for q in range(3):
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i + q, color)
strip.show()
time.sleep(wait_ms / 1000.0)
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i + q, 0)
class RpiWs281xLedstrip(AbstractLight):
def __init__(self) -> None:
super().__init__(led_count=LED_COUNT)
self.pixel_strip = PixelStrip(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
self.pixel_strip.begin()
def write(self):
assert self.pixel_strip.numPixels() == len(self.leds)
# Update the value for each of the pixels in the strip
for i in range(startLED, self.pixel_strip.numPixels()):
[red, green, blue, brightness] = self.leds[i]
colors = (int(c * brightness * 255) for c in (red, green, blue))
self.pixel_strip.setPixelColorRGB(i, *colors, 255)
# Flush the new values to the strip
self.pixel_strip.show()
class RaspberryPiHAL:
def __init__(self, config):
self.num_pixels = config['LedMatrix']['columns'] * config['LedMatrix'][
'stride']
self.strip = PixelStrip(self.num_pixels, LED_PIN, LED_FREQ_HZ, LED_DMA,
LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
self.strip.begin()
def init_display(self, num_pixels=64):
self.clear_display()
def clear_display(self):
c = Color(0, 0, 0)
for i in range(self.num_pixels):
self.strip.setPixelColor(i, c)
self.strip.show()
def update_display(self, num_modified_pixels):
if not num_modified_pixels:
return
self.strip.show()
def put_pixel(self, addr, r, g, b):
self.strip.setPixelColor(addr % self.num_pixels, Color(r, g, b))
def reset(self):
self.clear_display()
def process_input(self):
#TODO: implement
return 0
def set_rtc(self, t):
#Not relevant
pass
def set_auto_time(self, enable=True):
#Not relevant
pass
def suspend_host(self, restart_timeout_seconds):
#Not relevant
pass
def theater_chase(strip: PixelStrip,
color: color,
wait_ms: int = 50,
iterations: int = 10):
"""Movie theater light style chaser animation.
:param strip:
:param color:
:param wait_ms:
:param iterations:
:return:
"""
for j in range(iterations):
for q in range(3):
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i + q, color)
strip.show()
time.sleep(wait_ms / 1000.0)
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i + q, 0)
class LedManager(object):
# TODO: - Log and document this class
# LED strip configuration:
__LED_COUNT = 3 # Number of LED pixels.
__LED_PIN = 18 # GPIO pin connected to the pixels (must support PWM!).
__LED_FREQ_HZ = 800000 # LED signal frequency in hertz (usually 800khz)
__LED_DMA = 10 # DMA channel to use for generating signal (try 10)
__LED_BRIGHTNESS = 255 # Set to 0 for darkest and 255 for brightest
__LED_INVERT = False # True to invert the signal (when using NPN transistor level shift)
__LED_CHANNEL = 0
__LED_STRIP = ws.WS2812_STRIP
__instance = None
def __init__(self):
if LedManager.__instance is None:
LedManager.__instance = self
self.strip = PixelStrip(self.__LED_COUNT, self.__LED_PIN, self.__LED_FREQ_HZ, self.__LED_DMA,
self.__LED_INVERT, self.__LED_BRIGHTNESS, self.__LED_CHANNEL, self.__LED_STRIP)
self.strip.begin()
else:
raise Exception("This class is a Singleton")
@staticmethod
def get_instance():
"""
:rtype: LedManager
"""
if LedManager.__instance is None:
LedManager()
return LedManager.__instance
# Define function that colors all LEDs of the given color.
def color_wipe(self, led_color, wait_ms=50):
for i in range(0, self.strip.numPixels()):
self.strip.setPixelColor(i, led_color.value)
self.strip.show()
time.sleep(wait_ms / 1000.0)
class LedStrip(object):
def __init__(self):
self.status = 'off'
self.strip = PixelStrip(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
self.strip.begin()
self.set_color(BLACK)
def toggle_light(self):
if self.status == STATUS_ON:
self.set_color(BLACK)
self.status = STATUS_OFF
else:
self.set_color(SOFT_WHITE)
self.status = STATUS_ON
def set_color(self, color, wait_ms=200):
for i in range(self.strip.numPixels()):
self.strip.setPixelColor(i, color)
self.strip.show()
time.sleep(wait_ms / 1000)
def get_status(self):
return self.status
class PiHandler(object):
"""
Hanlder fot the rapberrypi and led control
"""
def __init__(self, pixels):
# the imports must be hidden since they won't work on pc
from rpi_ws281x import PixelStrip
# init the pixel strip
self.np = PixelStrip(pixels, PIN)
self.np.begin()
self.pixel_count = pixels
self.is_stopped = False
def set(self, index, c, b, g, r):
from rpi_ws281x import Color
if index is not None and index < self.pixel_count:
# scale the rgb value by the intensity
r = scale(r, c)
g = scale(g, c)
b = scale(b, c)
# create color and set it
color = Color(r, g, b)
self.np.setPixelColor(index, color)
def send(self):
self.np.show()
def on_loop(self):
raise NotImplementedError
def close(self):
for index in range(self.pixel_count):
self.np.setPixelColor(index, 0)
self.np.show()
