def __init__(self,
num,
pin,
freq_hz=800000,
dma=10,
invert=False,
brightness=255,
channel=0,
strip_type=None,
gamma=None):
"""Class to represent a SK6812/WS281x LED display. Num should be the
number of pixels in the display, and pin should be the GPIO pin connected
to the display signal line (must be a PWM pin like 18!). Optional
parameters are freq, the frequency of the display signal in hertz (default
800khz), dma, the DMA channel to use (default 10), invert, a boolean
specifying if the signal line should be inverted (default False), and
channel, the PWM channel to use (defaults to 0).
"""
if gamma is None:
# Support gamma in place of strip_type for back-compat with
# previous version of forked library
if type(strip_type) is list and len(strip_type) == 256:
gamma = strip_type
strip_type = None
else:
gamma = list(range(256))
if strip_type is None:
strip_type = ws.WS2811_STRIP_GRB
# Create ws2811_t structure and fill in parameters.
self._leds = ws.new_ws2811_t()
# Initialize the channels to zero
for channum in range(2):
chan = ws.ws2811_channel_get(self._leds, channum)
ws.ws2811_channel_t_count_set(chan, 0)
ws.ws2811_channel_t_gpionum_set(chan, 0)
ws.ws2811_channel_t_invert_set(chan, 0)
ws.ws2811_channel_t_brightness_set(chan, 0)
# Initialize the channel in use
self._channel = ws.ws2811_channel_get(self._leds, channel)
ws.ws2811_channel_t_gamma_set(self._channel, gamma)
ws.ws2811_channel_t_count_set(self._channel, num)
ws.ws2811_channel_t_gpionum_set(self._channel, pin)
ws.ws2811_channel_t_invert_set(self._channel, 0 if not invert else 1)
ws.ws2811_channel_t_brightness_set(self._channel, brightness)
ws.ws2811_channel_t_strip_type_set(self._channel, strip_type)
# Initialize the controller
ws.ws2811_t_freq_set(self._leds, freq_hz)
ws.ws2811_t_dmanum_set(self._leds, dma)
# Grab the led data array.
self._led_data = _LED_Data(self._channel, num)
# Substitute for __del__, traps an exit condition and cleans up properly
atexit.register(self._cleanup)
def __init__(self,
num,
pin,
freq_hz=800000,
dma=5,
invert=False,
brightness=128,
channel=0,
gamma=None):
"""Class to represent a SK6812/WS281x LED display. Num should be the
number of pixels in the display, and pin should be the GPIO pin connected
to the display signal line (must be a PWM pin like 18!). Optional
parameters are freq, the frequency of the display signal in hertz (default
800khz), dma, the DMA channel to use (default 5), invert, a boolean
specifying if the signal line should be inverted (default False), and
channel, the PWM channel to use (defaults to 0).
"""
if gamma is None:
gamma = list(range(256))
self._gamma = gamma
# Keep track of successful init so we don't call ws2811_fini unecessarily
self._init_successful = False
# Create ws2811_t structure and fill in parameters.
self._leds = ws.new_ws2811_t()
# Initialize the channels to zero
for channum in range(2):
chan = ws.ws2811_channel_get(self._leds, channum)
ws.ws2811_channel_t_count_set(chan, 0)
ws.ws2811_channel_t_gpionum_set(chan, 0)
ws.ws2811_channel_t_invert_set(chan, 0)
ws.ws2811_channel_t_brightness_set(chan, 0)
# Initialize the channel in use
self._channel = ws.ws2811_channel_get(self._leds, channel)
ws.ws2811_channel_t_gamma_set(self._channel, self._gamma)
ws.ws2811_channel_t_count_set(self._channel, num)
ws.ws2811_channel_t_gpionum_set(self._channel, pin)
ws.ws2811_channel_t_invert_set(self._channel, 0 if not invert else 1)
ws.ws2811_channel_t_brightness_set(self._channel, brightness)
ws.ws2811_channel_t_strip_type_set(self._channel, ws.WS2811_STRIP_GRB)
# Initialize the controller
ws.ws2811_t_freq_set(self._leds, freq_hz)
ws.ws2811_t_dmanum_set(self._leds, dma)
# Grab the led data array.
self._led_data = _LED_Data(self._channel, num)
# Substitute for __del__, traps an exit condition and cleans up properly
atexit.register(self._cleanup)
def setGamma(self, gamma):
if type(gamma) is list and len(gamma) == 256:
self._gamma = gamma
ws.ws2811_channel_t_gamma_set(self._channel, self._gamma)
def set_gamma(self, gamma):
with _ws821x_lock:
if type(gamma) is list and len(gamma) == 256:
self._gamma = gamma
ws.ws2811_channel_t_gamma_set(self._channel, self._gamma)
