使用树莓派控制led灯板 ws2812

使用树莓派控制led灯板ws2812

推荐一个库 Adafruit_NeoPixel

这里是地址：https://github.com/adafruit/Adafruit_NeoPixel

这个原本是在Arduino上控制led的库
github上的介绍：

Arduino library for controlling single-wire-based LED pixels and strip such as the Adafruit 60 LED/meter Digital LED strip, the Adafruit FLORA RGB Smart Pixel, the Adafruit Breadboard-friendly RGB Smart Pixel, the Adafruit NeoPixel Stick, and the Adafruit NeoPixel Shield.

After downloading, rename folder to ‘Adafruit_NeoPixel’ and install in Arduino Libraries folder. Restart Arduino IDE, then open File->Sketchbook->Library->Adafruit_NeoPixel->strandtest sketch.

Compatibility notes: Port A is not supported on any AVR processors at this time

Supported chipsets
We have included code for the following chips - sometimes these break for exciting reasons that we can’t control in which case please open an issue!

AVR ATmega and ATtiny (any 8-bit) - 8 MHz, 12 MHz and 16 MHz
Teensy 3.x and LC
Arduino Due
Arduino 101
ATSAMD21 (Arduino Zero/M0 and other SAMD21 boards) @ 48 MHz
ATSAMD51 @ 120 MHz
Adafruit STM32 Feather @ 120 MHz
ESP8266 any speed
ESP32 any speed
Nordic nRF52 (Adafruit Feather nRF52), nRF51 (micro:bit)
Check forks for other architectures not listed here!

用在树莓派(python)上面也是一样的：

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下面是我做的成品地址:https://www.bilibili.com/video/av47393296

欢迎来讨论

下面是代码哦：

import time
import board
import neopixelpixel_pin = board.D18  #定义针脚
num_pixels = 30 #定义LED个数
ORDER = neopixel.GRBpixels = neopixel.NeoPixel(pixel_pin, num_pixels, brightness=0.2, auto_write=False,pixel_order=ORDER)def wheel(pos):# Input a value 0 to 255 to get a color value.# The colours are a transition r - g - b - back to r.if pos < 0 or pos > 255:r = g = b = 0elif pos < 85:r = int(pos * 3)g = int(255 - pos*3)b = 0elif pos < 170:pos -= 85r = int(255 - pos*3)g = 0b = int(pos*3)else:pos -= 170r = 0g = int(pos*3)b = int(255 - pos*3)return (r, g, b) if ORDER == neopixel.RGB or ORDER == neopixel.GRB else (r, g, b, 0)def rainbow_cycle(wait):for j in range(255):for i in range(num_pixels):pixel_index = (i * 256 // num_pixels) + jpixels[i] = wheel(pixel_index & 255)pixels.show()time.sleep(wait)while True:pixels.fill((255, 0, 0))pixels.show()time.sleep(1)pixels.fill((0, 255, 0))pixels.show()time.sleep(1)pixels.fill((0, 0, 255))pixels.show()time.sleep(1)rainbow_cycle(0.001)