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#!/usr/bin/python
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from bottle import get,request, route, run, static_file,template
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import time, threading
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# sudo pip install rpi_ws281x
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from rpi_ws281x import Adafruit_NeoPixel, Color
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# LED strip configuration:
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LED_COUNT = 4 # Number of LED pixels.
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LED_PIN = 18 # GPIO pin connected to the pixels (must support PWM!).
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LED_FREQ_HZ = 800000 # LED signal frequency in hertz (usually 800khz)
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LED_DMA = 5 # DMA channel to use for generating signal (try 5)
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LED_BRIGHTNESS = 255 # Set to 0 for darkest and 255 for brightest
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LED_INVERT = False # True to invert the signal (when using NPN transistor level shift)
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LED_CHANNEL = 0
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LED_STRIP = ws.WS2811_STRIP_RGB
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# Create NeoPixel object with appropriate configuration.
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strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS,LED_CHANNEL,LED_STRIP)
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# Intialize the library (must be called once before other functions).
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strip.begin()
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strip.show()
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rgb = 0
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light_type = 'static' #'static':静态 'breath':呼吸 'flash':闪烁
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#访问文件根目录
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@get("/")
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def index():
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global rgb, light_type
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rgb = 0xffffff
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light_type = 'static'
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return static_file('index.html', './')
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#网页上的静态文件需要做传输处理
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@route('/<filename>')
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def server_static(filename):
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return static_file(filename, root='./')
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#POST方式获取Ajax传输过来的rgb值
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@route('/rgb', method='POST')
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def rgbLight():
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red = request.POST.get('red')
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green = request.POST.get('green')
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blue = request.POST.get('blue')
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#print('red='+ red +', green='+ green +', blue='+ blue)
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red = int(red)
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green = int(green)
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blue = int(blue)
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if 0 <= red <= 255 and 0 <= green <= 255 and 0 <= blue <= 255:
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global rgb
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rgb = (red<<8) | (green<<16) | blue
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#POST方式获取Ajax传输过来的type值
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@route('/lightType', method='POST')
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def lightType():
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global light_type
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light_type = request.POST.get('type')
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print("lightType="+light_type)
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#灯光循环检测控制
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def lightLoop():
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global rgb, light_type
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flashTime = [0.3, 0.2, 0.1, 0.05, 0.05, 0.1, 0.2, 0.5, 0.2] #闪烁时间间隔
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flashTimeIndex = 0 #闪烁时间间隔索引
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f = lambda x: (-1/10000.0)*x*x + (1/50.0)*x #用抛物线模拟呼吸灯
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x = 0
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while True:
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if light_type == 'static': #静态显示
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for i in range(0,strip.numPixels()):
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strip.setPixelColor(i, rgb)
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strip.show()
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time.sleep(0.05)
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elif light_type == 'breath': #闪烁显示
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red = int(((rgb & 0x00ff00)>>8) * f(x))
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green = int(((rgb & 0xff0000) >> 16) * f(x))
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blue = int((rgb & 0x0000ff) * f(x))
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_rgb = int((red << 8) | (green << 16) | blue)
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for i in range(0,strip.numPixels()):
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strip.setPixelColor(i, _rgb)
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strip.show()
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time.sleep(0.02)
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x += 1
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if x >= 200:
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x = 0
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elif light_type == 'flash': #呼吸灯显示
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for i in range(0,strip.numPixels()):
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strip.setPixelColor(i, rgb)
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strip.show()
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time.sleep(flashTime[flashTimeIndex])
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for i in range(0,strip.numPixels()):
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strip.setPixelColor(i, 0)
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strip.show()
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time.sleep(flashTime[flashTimeIndex])
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flashTimeIndex += 1
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if flashTimeIndex >= len(flashTime):
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flashTimeIndex = 0
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#开辟新线程负责rgb灯光显示
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t = threading.Thread(target = lightLoop)
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t.setDaemon(True)
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t.start()
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#设置服务器ip地址和端口(提示：使用前请设置成你的树莓派ip地址)
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run(host="0.0.0.0", port=8002)
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