Source code for neopixel

# SPDX-FileCopyrightText: 2016 Damien P. George
# SPDX-FileCopyrightText: 2017 Scott Shawcroft for Adafruit Industries
# SPDX-FileCopyrightText: 2019 Carter Nelson
# SPDX-FileCopyrightText: 2019 Roy Hooper
# SPDX-License-Identifier: MIT

`neopixel` - NeoPixel strip driver

* Author(s): Damien P. George, Scott Shawcroft, Carter Nelson, Rose Hooper

import sys
import board
import digitalio
from neopixel_write import neopixel_write

import adafruit_pixelbuf

    # Used only for typing
    from typing import Optional, Type
    from types import TracebackType
    import microcontroller
except ImportError:

__version__ = "0.0.0+auto.0"
__repo__ = ""

# Pixel color order constants
"""Red Green Blue"""
"""Green Red Blue"""
"""Red Green Blue White"""
"""Green Red Blue White"""

[docs] class NeoPixel(adafruit_pixelbuf.PixelBuf): """ A sequence of neopixels. :param ~microcontroller.Pin pin: The pin to output neopixel data on. :param int n: The number of neopixels in the chain :param int bpp: Bytes per pixel. 3 for RGB and 4 for RGBW pixels. :param float brightness: Brightness of the pixels between 0.0 and 1.0 where 1.0 is full brightness :param bool auto_write: True if the neopixels should immediately change when set. If False, `show` must be called explicitly. :param str pixel_order: Set the pixel color channel order. GRBW is set by default. Example for Circuit Playground Express: .. code-block:: python import neopixel from board import * RED = 0x100000 # (0x10, 0, 0) also works pixels = neopixel.NeoPixel(NEOPIXEL, 10) for i in range(len(pixels)): pixels[i] = RED Example for Circuit Playground Express setting every other pixel red using a slice: .. code-block:: python import neopixel from board import * import time RED = 0x100000 # (0x10, 0, 0) also works # Using ``with`` ensures pixels are cleared after we're done. with neopixel.NeoPixel(NEOPIXEL, 10) as pixels: pixels[::2] = [RED] * (len(pixels) // 2) time.sleep(2) .. py:method:: Shows the new colors on the pixels themselves if they haven't already been autowritten. The colors may or may not be showing after this function returns because it may be done asynchronously. .. py:method:: NeoPixel.fill(color) Colors all pixels the given ***color***. .. py:attribute:: brightness Overall brightness of the pixel (0 to 1.0) """ def __init__( self, pin: microcontroller.Pin, n: int, *, bpp: int = 3, brightness: float = 1.0, auto_write: bool = True, pixel_order: str = None ): if not pixel_order: pixel_order = GRB if bpp == 3 else GRBW elif isinstance(pixel_order, tuple): order_list = [RGBW[order] for order in pixel_order] pixel_order = "".join(order_list) self._power = None if ( sys.implementation.version[0] >= 7 and getattr(board, "NEOPIXEL", None) == pin ): power = getattr(board, "NEOPIXEL_POWER_INVERTED", None) polarity = power is None if not power: power = getattr(board, "NEOPIXEL_POWER", None) if power: try: self._power = digitalio.DigitalInOut(power) self._power.switch_to_output(value=polarity) except ValueError: pass super().__init__( n, brightness=brightness, byteorder=pixel_order, auto_write=auto_write ) = digitalio.DigitalInOut(pin) = digitalio.Direction.OUTPUT
[docs] def deinit(self) -> None: """Blank out the NeoPixels and release the pin.""" self.fill(0) if self._power: self._power.deinit()
def __enter__(self): return self def __exit__( self, exception_type: Optional[Type[BaseException]], exception_value: Optional[BaseException], traceback: Optional[TracebackType], ): self.deinit() def __repr__(self): return "[" + ", ".join([str(x) for x in self]) + "]" @property def n(self) -> int: """ The number of neopixels in the chain (read-only) """ return len(self)
[docs] def write(self) -> None: """.. deprecated: 1.0.0 Use ``show`` instead. It matches Micro:Bit and Arduino APIs."""
def _transmit(self, buffer: bytearray) -> None: neopixel_write(, buffer)