def __init__(self,
leds=[32, 8],
pin=18,
channel=0,
freq_hz=800000,
dma=5,
invert=False,
brightness=255,
type_=ws.WS2811_STRIP_GRB):
self._leds = ws.new_ws2811_t()
for cn in range(2):
c = ws.ws2811_channel_get(self._leds, cn)
ws.ws2811_channel_t_count_set(c, 0)
ws.ws2811_channel_t_gpionum_set(c, 0)
ws.ws2811_channel_t_invert_set(c, 0)
ws.ws2811_channel_t_brightness_set(c, 0)
self._ch = ws.ws2811_channel_get(self._leds, channel)
ws.ws2811_channel_t_count_set(self._ch, leds[0] * leds[1])
ws.ws2811_channel_t_gpionum_set(self._ch, pin)
ws.ws2811_channel_t_invert_set(self._ch, (0 if invert == False else 1))
ws.ws2811_channel_t_brightness_set(self._ch, brightness)
ws.ws2811_channel_t_strip_type_set(self._ch, type_)
ws.ws2811_t_freq_set(self._leds, freq_hz)
ws.ws2811_t_dmanum_set(self._leds, dma)
self.data = LED_Data(self._ch, leds)
atexit.register(self._c)
r = ws.ws2811_init(self._leds)
if (r != ws.WS2811_SUCCESS):
raise RuntimeError(ws.ws2811_get_return_t_str(r))
def begin(self):
"""Initialize library, must be called once before other functions are
called.
"""
resp = ws.ws2811_init(self._leds)
if resp != ws.WS2811_SUCCESS:
message = ws.ws2811_get_return_t_str(resp)
raise RuntimeError('ws2811_init failed with code {0} ({1})'.format(resp, message))