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from neopixel import *
class Strip:
def __init__(self, stripConf):
self.SEGMENTS = stripConf["segments"]
self.SEGMENT_CONFIG = stripConf["segment_config"]
self.LED_FREQ_HZ = stripConf["led_freq_hz"] # LED signal frequency in hertz (usually 800khz)
self.LED_CHANNEL = stripConf["led_channel"] # Set to '1' for GPIOs 13, 19, 41, 45, 53
self.LED_INVERT = stripConf["led_invert"] # True to invert the signal, (when using NPN transistor level shift)
self.LED_PIN = stripConf["led_pin"] # 18 uses PWM, 10 uses SPI /dev/spidev0.0
self.LED_DMA = stripConf["led_dma"] # DMA channel for generating the signal, on the newer ones, try 10
self.LED_COUNT = sum(self.SEGMENTS) # Number of LEDs in strip
self.LED_BRIGHTNESS = 255
self.strip = Adafruit_NeoPixel(
self.LED_COUNT,
self.LED_PIN,
self.LED_FREQ_HZ,
self.LED_DMA,
self.LED_INVERT,
self.LED_BRIGHTNESS,
self.LED_CHANNEL
)
self.strip.begin()
def show(self):
"""Update the display with the data from the LED buffer."""
self.strip.show()
def setPixelColor(self, n, color):
"""Set LED at position n to the provided 24-bit color value (in RGB order).
"""
self.strip.setPixelColor(n, color)
def setPixelColorRGB(self, n, red, green, blue, white = 0):
"""Set LED at position n to the provided red, green, and blue color.
Each color component should be a value from 0 to 255 (where 0 is the
lowest intensity and 255 is the highest intensity).
"""
self.strip.setPixelColor(n, Color(red, green, blue, white))
def setBrightness(self, brightness):
"""Scale each LED in the buffer by the provided brightness. A brightness
of 0 is the darkest and 255 is the brightest.
"""
self.strip.setBrightness(brightness)
def getBrightness(self):
"""Get the brightness value for each LED in the buffer. A brightness
of 0 is the darkest and 255 is the brightest.
"""
return self.strip.getBrightness()
def getPixels(self):
"""Return an object which allows access to the LED display data as if
it were a sequence of 24-bit RGB values.
"""
return self.strip.getPixels()
def numPixels(self):
"""Return the number of pixels in the display."""
return self.LED_COUNT
def getPixelColor(self, n):
"""Get the 24-bit RGB color value for the LED at position n."""
return self.strip.getPixelColor(n)
def Color(red, green, blue, white = 0):
"""Convert the provided red, green, blue color to a 24-bit color value.
Each color component should be a value 0-255 where 0 is the lowest intensity
and 255 is the highest intensity.
"""
return (white << 24) | (red << 16)| (green << 8) | blue
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