如何使用树莓派控制ws2812灯带
时间: 2023-07-20 10:34:21 浏览: 284
控制ws2812灯带,需要用到树莓派上的GPIO口,以及相关的软件库。以下是一个简单的操作流程:
1. 连接ws2812灯带到树莓派上,可以使用杜邦线将灯带的DI引脚连接到树莓派的GPIO口(例如GPIO18)上。
2. 安装控制ws2812灯带的Python库,例如rpi_ws281x。可以使用pip install rpi_ws281x命令进行安装。
3. 编写控制ws2812灯带的Python脚本,使用rpi_ws281x库提供的函数进行控制。例如:
```python
import time
from rpi_ws281x import *
# LED strip configuration:
LED_COUNT = 8 # Number of LED pixels.
LED_PIN = 18 # GPIO pin connected to the pixels (18 uses PWM!).
LED_FREQ_HZ = 800000 # LED signal frequency in hertz (usually 800khz)
LED_DMA = 10 # DMA channel to use for generating signal (try 10)
LED_BRIGHTNESS = 255 # Set to 0 for darkest and 255 for brightest
LED_INVERT = False # True to invert the signal (when using NPN transistor level shift)
LED_CHANNEL = 0 # set to '1' for GPIOs 13, 19, 41, 45 or 53
# Define the colors of the LED pixels.
colors = [
Color(255, 0, 0), # Red
Color(0, 255, 0), # Green
Color(0, 0, 255), # Blue
]
# Create a LED strip object.
strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
strip.begin()
# Loop through the colors and display them on the LED strip.
while True:
for color in colors:
for i in range(strip.numPixels()):
strip.setPixelColor(i, color)
strip.show()
time.sleep(1)
```
这个脚本使用了rpi_ws281x库提供的函数,通过循环控制LED灯带的颜色变化,可以通过修改colors列表中的颜色值来改变LED灯带的显示效果。
4. 运行Python脚本,控制LED灯带的显示效果。可以使用python命令运行脚本,例如:
```shell
python led_control.py
```
这样就可以实现通过树莓派控制ws2812灯带的效果了。
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