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()