Apa102-pi is a pure Python library to drive APA102 type LED strands. It is supposed to work on a Raspberry Pi, and is not tested on any other platform.

首先需要安装 Adafruit_Python_GPIO
https://github.com/adafruit/Adafruit_Python_GPIO
```
sudo apt-get update
sudo apt-get install build-essential python-pip python-dev python-smbus git
git clone https://github.com/adafruit/Adafruit_Python_GPIO.git
cd Adafruit_Python_GPIO
sudo python setup.py install
```
再安 Clone
https://github.com/tinue/apa102-pi

修改 sample.py，可选
```
# Initialize the library and the strip
strip = apa102.APA102(num_led=4, global_brightness=20, mosi=17, sclk=4,
order='rbg')

# Turn off all pixels (sometimes a few light up when the strip gets power)
strip.clear_strip()

# Prepare a few individual pixels
strip.set_pixel_rgb(0, 0xFF0000) # Red
strip.set_pixel_rgb(1, 0x00FF00) # White
strip.set_pixel_rgb(2, 0x0000FF) # Green
strip.set_pixel_rgb(3, 0xFF00FF) # Green

# Copy the buffer to the Strip (i.e. show the prepared pixels)
strip.show()

# Wait a few Seconds, to check the result
time.sleep(20)
```
num_led 是灯条上 LED 的数量。
set_pixel_rgb 方法后面第一个参数是灯条上 LED 的索引，从 0 开始，再后面的参数是颜色编码。