def update():
"""
Updates the RGB LEDs.
This will apply changes that have been set with :func:`leds.prep` or
:func:`leds.prep_hsv`. The LEDs can be only updated in bulk, so using this
approach instead of :func:`leds.set` or :func:`leds.set_hsv` significantly
reduces the load on the corresponding hardware bus.
"""
sys_leds.update()
def set_gamma(power=4.0):
"""
Applies same power function gamma correction to all RGB channels.
:param float power: Exponent of power function.
"""
table = [
int(math.ceil(math.pow((x / 255.0), power) * 255)) for x in range(256)
]
for i in range(3):
sys_leds.set_gamma(i, table)
sys_leds.update()
def set_gamma_rgb(channel, power=4.0, gain=1.0):
"""
Applies power function gamma correction with optional amplification to a single RGB channel.
:param int channel: RGB channel to be adjusted. 0->Red, 1->Green, 2->Blue.
:param float power: Exponent of power function.
:param float gain: Amplification of channel. Values above 1.0 might cause
overflow.
"""
table = [
int(math.ceil(math.pow((x / 255.0), power) * gain * 255))
for x in range(256)
]
sys_leds.set_gamma(channel, table)
sys_leds.update()