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import json
from os import path
from .neopixel import *
from .matrix import Matrix, get_segment_range
from .power_calc import calcCurrent
class Strip:
def __init__(self, strip_conf):
self.SEGMENTS = strip_conf["segments"]
self.LED_FREQ_HZ = strip_conf["led_freq_hz"] # LED signal frequency in hertz (usually 800khz)
self.LED_CHANNEL = strip_conf["led_channel"] # Set to '1' for GPIOs 13, 19, 41, 45, 53
self.LED_INVERT = strip_conf["led_invert"] # True to invert the signal, (when using NPN transistor level shift)
self.LED_PIN = strip_conf["led_pin"] # 18 uses PWM, 10 uses SPI /dev/spidev0.0
self.LED_DMA = strip_conf["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
if ("color_calibration" in strip_conf) and (strip_conf["color_calibration"] != ""):
self.COLOR_CALIBRATION = strip_conf["led_calibration"]
else:
self.COLOR_CALIBRATION = [(1,1,1) for x in range(self.LED_COUNT)]
self.TMPCOLORSTATE = [0 for x in range(self.LED_COUNT)]
self.COLORSTATE = [0 for x in range(self.LED_COUNT)]
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()
# Blank out all the LEDs
i = 0
while True:
self.strip.setPixelColor(i, 0)
i += 1
if (i > self.LED_COUNT): break
self.strip.show()
# Setup matrix
print(" * Generating matrix")
# try:
self.pixelMatrix = Matrix(self.SEGMENTS, strip_conf["matrix"])
self.pixelMatrix.dump()
# except:
# print("Something went wrong while setting up your self-defined matrix.")
self.__power_on = True
self.__brightness = 255
self.__actual_brightness = self.__brightness
self.__globvars_path = path.join(path.split(path.dirname(path.abspath(__file__)))[0], "globvars.json")
if path.exists(self.__globvars_path):
try:
with open(self.__globvars_path, "r") as f:
globvars = json.load(f)
self.power_on = globvars["power_on"]
self.brightness = globvars["brightness"]
except:
print("Could not load saved globvars...")
def save_globvars(self):
with open(self.__globvars_path, "w") as f:
f.write(json.dumps({
"power_on": self.__power_on,
"brightness": self.__brightness
}))
@property
def power_on(self):
return self.__power_on
@power_on.setter
def power_on(self, value: bool):
self.__power_on = value
if (self.power_on):
self.__actual_brightness = self.__brightness
# self.strip.setBrightness(self.__brightness)
else:
self.__actual_brightness = 0
# self.strip.setBrightness(0)
self.save_globvars()
@property
def brightness(self):
# return self.strip.getBrightness()
return self.__actual_brightness
@brightness.setter
def brightness(self, value: int):
if 0 <= value <= 255:
self.__brightness = value
if (self.power_on):
self.__actual_brightness = value
# self.strip.setBrightness(value)
self.save_globvars()
else:
raise Exception(f"Value ({value}) outside allowed range (0-255)")
def show(self):
"""Update the display with the data from the LED buffer."""
self.COLORSTATE = self.TMPCOLORSTATE
self.strip.show()
def set_pixel_color(self, n, *color):
"""Set LED at position n to the provided 24-bit color value (in RGB order).
"""
c = detect_format_convert_color(*color)
self.TMPCOLORSTATE[n] = c
# self.strip.setPixelColor(n, )
def set_pixel_color_XY(self, x, y, *color):
"""Set LED at position n to the provided 24-bit color value (in RGB order).
"""
self.set_pixel_color(self.pixelMatrix.get(x, y), *color)
def set_segment_color(self, segment, *color):
"""Set a whole segment 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)."""
for n in get_segment_range(self.SEGMENTS, segment):
self.set_pixel_color(n, *color)
def get_pixels(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 num_pixels(self):
"""Return the number of pixels in the display."""
return self.LED_COUNT
def get_pixel_color(self, n):
"""Get the 24-bit RGB color value for the LED at position n."""
return self.strip.getPixelColor(n)
def color_from_rgb(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
def color_from_hex(hex_color: str):
""" Convert the provided hex code to a 24-bit color value. """
value = hex_color.lstrip('#')
lv = len(value)
rgb = tuple(int(value[i:i+lv//3], 16) for i in range(0, lv, lv//3))
return color_from_rgb(red=rgb[1], green=rgb[0], blue=rgb[2])
def detect_format_convert_color(*color) -> int:
"""
Detect format of a color and return its 24-bit color value.
If parameter is only a str, it will be treated as a hex value.
If parameter is a tuple, the first three items in that tuple will be treated as a rgb value.
If parameter is a int, it will be treated as a 24-bit color value.
If there are 3 parameters, these will be treated as a rgb value.
"""
if (len(color) == 1) and (isinstance(color[0], str)):
return color_from_hex(color[0])
if (len(color) == 1) and (isinstance(color[0], tuple)):
return color_from_rgb(*(color[0]))
if (len(color) == 1) and (isinstance(color[0], int)):
return color[0]
if (len(color) == 3):
return color_from_rgb(*color)
raise ValueError("Invalid parameters provided, check documentation.")
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