def main():
# identify global variables that we will access in this function
global leds, sb
# create an instance of LEDStrip object - pass number of pixels and link to spi connection
leds = ledstrip.LEDStrip(pixels=pixels, spi=spidev)
# set spacesb name and create spacesb object
sbName = ("Data Bar " + str(random.randint(0, 2000)))
sb = spacebrew.SpaceBrew(sbName, server=args.server)
# register all of the subscription channels
sb.addSubscriber("light", "range")
sb.addSubscriber("color_red", "range")
sb.addSubscriber("color_green", "range")
sb.addSubscriber("color_blue", "range")
# associate a callback function to each subscription channel
sb.subscribe("light", updateLight)
sb.subscribe("color_red", updateRed)
sb.subscribe("color_green", updateGreen)
sb.subscribe("color_blue", updateBlue)
# connect to spacesb
sb.start()
print "App is running and conected to Spacebrew name is ", sbName
def main():
# initialize spi and leds objects
spidev = file("/dev/spidev0.0",
"wb") # ref to spi connection to the led bar
leds = ledstrip.LEDStrip(pixels=args.leds, spi=spidev)
pixel_edge = 0 # current pixel whose state will be flipped
turn_on = True # holds whether pixel will be switched on or off
print "Let's start chasing"
while (True):
# update the pixel at the edge of the animation
if turn_on == True:
leds.setPixelColorRGB(pixel=pixel_edge,
red=127,
green=127,
blue=127)
else:
leds.setPixelColorRGB(pixel=pixel_edge, red=0, green=0, blue=0)
# update all leds
leds.show()
# move the chase forward
pixel_edge = (pixel_edge + 1) % leds.numPixels()
# when pixel goes back to start of strip then switch from on to off, or off to on
if pixel_edge == 0: turn_on = not turn_on
# delay for 20 milliseconds
time.sleep(0.02)
def setUp(self):
self.numberOfPixels = 32
self.spidevFile = "/dev/spidev0.0"
self.spidev = open(
self.spidevFile,
"wb") # spidev is the file object of the SPI connection
self.leds = ledstrip.LEDStrip(
self.numberOfPixels, self.spidev) # Initialise the constructor.
def init():
global states
global leds
global timeout
number_of_lights = 32
timeout = reactor.callLater(SHIFTTIME,shiftOne)
states = deque(['unknown']*number_of_lights)
spidev = file("/dev/spidev0.0", "wb")
leds = ledstrip.LEDStrip(pixels=number_of_lights, spi=spidev)
def alarm_start(start_now):
while True:
now = time.time()
if now >= start_now and now <= start_now + 1:
# initialize spi and leds objects
spidev = file("/dev/spidev0.0",
"wb") # ref to spi connection to the led bar
leds = ledstrip.LEDStrip(pixels=args.leds, spi=spidev)
all_off(leds)
logging.info('Starting alarm')
alarm_on(leds, debug=False)
time.sleep(600)
logging.info('Stopping alarm')
all_off(leds)
break
def main():
# initialize spi and leds objects
spidev = file("/dev/spidev0.0", "wb") # ref to spi connection to the led bar
leds = ledstrip.LEDStrip(pixels=args.leds, spi=spidev)
turn_off(leds)
while True:
ured, ugreen, ublue = raw_input( "Enter RGB values (x to exit): ").split()
if ured == 'x':
break
for i in range(32):
leds.setPixelColorRGB(pixel = i, red = int(ured), green = int(ugreen), blue = int(ublue))
leds.show()
time.sleep(3)
turn_off(leds)
def main():
# initialize spi and leds objects
spidev = file("/dev/spidev0.0",
"wb") # ref to spi connection to the led bar
leds = ledstrip.LEDStrip(pixels=args.leds, spi=spidev)
pixel_edge = 0 # current pixel whose state will be flipped
turn_on = True # holds whether pixel will be switched on or off
print "Let's start chasing"
while (True):
for pixel_edge in range(0, leds.numPixels()):
if turn_on == True:
if pixel_edge == 14 or pixel_edge == 15:
leds.setPixelColorRGB(pixel=pixel_edge,
red=127,
green=127,
blue=127)
else:
leds.setPixelColorRGB(pixel=pixel_edge,
red=0,
green=0,
blue=0)
else:
if pixel_edge == 27:
leds.setPixelColorRGB(pixel=pixel_edge,
red=127,
green=127,
blue=127)
else:
leds.setPixelColorRGB(pixel=pixel_edge,
red=0,
green=0,
blue=0)
leds.show()
turn_on = not turn_on
time.sleep(1)
def __init__(self, numLeds):
spidev = file("/dev/spidev0.0",
"wb") # ref to spi connection to the led bar
self.leds = ledstrip.LEDStrip(pixels=numLeds, spi=spidev)
self.numLeds = numLeds
self.onLeds = [0] * numLeds