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rpi_ws281x.py: added option to turn off cleanup atexit register #117

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rpi_ws281x.py: added option to turn off cleanup atexit register #117

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12 changes: 8 additions & 4 deletions library/rpi_ws281x/rpi_ws281x.py
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Original file line number Diff line number Diff line change
Expand Up @@ -40,14 +40,15 @@ def Color(red, green, blue, white=0):

class PixelStrip:
def __init__(self, num, pin, freq_hz=800000, dma=10, invert=False,
brightness=255, channel=0, strip_type=None, gamma=None):
brightness=255, channel=0, strip_type=None, gamma=None, register_cleanup=True):
"""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).
specifying if the signal line should be inverted (default False),
channel, the PWM channel to use (defaults to 0), and register_cleanup,
if True registers the cleanup function with atexit (default True).
"""

if gamma is None:
Expand Down Expand Up @@ -90,7 +91,10 @@ def __init__(self, num, pin, freq_hz=800000, dma=10, invert=False,
self.size = num

# Substitute for __del__, traps an exit condition and cleans up properly
atexit.register(self._cleanup)
if register_cleanup:
atexit.register(self._cleanup)
else:
self.cleanup = self._cleanup

def __getitem__(self, pos):
"""Return the 24-bit RGB color value at the provided position or slice
Expand Down