74 lines
1.9 KiB
ReStructuredText
74 lines
1.9 KiB
ReStructuredText
|
:mod:`neopixel` --- control of WS2812 / NeoPixel LEDs
|
||
|
|
=====================================================
|
||
|
|
|
||
|
|
.. module:: neopixel
|
||
|
|
:synopsis: control of WS2812 / NeoPixel LEDs
|
||
|
|
|
||
|
|
This module provides a driver for WS2818 / NeoPixel LEDs.
|
||
|
|
|
||
|
|
.. note:: This module is only included by default on the ESP8266 and ESP32
|
||
|
|
ports. On STM32 / Pyboard, you can `download the module
|
||
|
|
<https://github.com/micropython/micropython/blob/master/drivers/neopixel/neopixel.py>`_
|
||
|
|
and copy it to the filesystem.
|
||
|
|
|
||
|
|
class NeoPixel
|
||
|
|
--------------
|
||
|
|
|
||
|
|
This class stores pixel data for a WS2812 LED strip connected to a pin. The
|
||
|
|
application should set pixel data and then call :meth:`NeoPixel.write`
|
||
|
|
when it is ready to update the strip.
|
||
|
|
|
||
|
|
For example::
|
||
|
|
|
||
|
|
import neopixel
|
||
|
|
|
||
|
|
# 32 LED strip connected to X8.
|
||
|
|
p = machine.Pin.board.X8
|
||
|
|
n = neopixel.NeoPixel(p, 32)
|
||
|
|
|
||
|
|
# Draw a red gradient.
|
||
|
|
for i in range(32):
|
||
|
|
n[i] = (i * 8, 0, 0)
|
||
|
|
|
||
|
|
# Update the strip.
|
||
|
|
n.write()
|
||
|
|
|
||
|
|
Constructors
|
||
|
|
------------
|
||
|
|
|
||
|
|
.. class:: NeoPixel(pin, n, *, bpp=3, timing=1)
|
||
|
|
|
||
|
|
Construct an NeoPixel object. The parameters are:
|
||
|
|
|
||
|
|
- *pin* is a machine.Pin instance.
|
||
|
|
- *n* is the number of LEDs in the strip.
|
||
|
|
- *bpp* is 3 for RGB LEDs, and 4 for RGBW LEDs.
|
||
|
|
- *timing* is 0 for 400KHz, and 1 for 800kHz LEDs (most are 800kHz).
|
||
|
|
|
||
|
|
Pixel access methods
|
||
|
|
--------------------
|
||
|
|
|
||
|
|
.. method:: NeoPixel.fill(pixel)
|
||
|
|
|
||
|
|
Sets the value of all pixels to the specified *pixel* value (i.e. an
|
||
|
|
RGB/RGBW tuple).
|
||
|
|
|
||
|
|
.. method:: NeoPixel.__len__()
|
||
|
|
|
||
|
|
Returns the number of LEDs in the strip.
|
||
|
|
|
||
|
|
.. method:: NeoPixel.__setitem__(index, val)
|
||
|
|
|
||
|
|
Set the pixel at *index* to the value, which is an RGB/RGBW tuple.
|
||
|
|
|
||
|
|
.. method:: NeoPixel.__getitem__(index)
|
||
|
|
|
||
|
|
Returns the pixel at *index* as an RGB/RGBW tuple.
|
||
|
|
|
||
|
|
Output methods
|
||
|
|
--------------
|
||
|
|
|
||
|
|
.. method:: NeoPixel.write()
|
||
|
|
|
||
|
|
Writes the current pixel data to the strip.
|