"""
Magic Candle - light falling on the LDR turns on the LED, which due
to arrangement keeps the LED on until LDR/LED path
is blocked
LDR (via a transistor switch - dark = '1') - D0
LED (via series resistor) - D1
pylibftdi - codedstructure 2013-2014
"""
import time
from pylibftdi.util import Bus
from pylibftdi import BitBangDevice
[docs]class Candle(object):
is_dark = Bus(0) # D0
be_light = Bus(1) # D1
[docs] def __init__(self):
# make the device connection, this is used
# in the Bus descriptors. Also set direction
# appropriately.
self.device = BitBangDevice(direction=0xFE)
[docs] def run(self):
while True:
time.sleep(0.05)
self.be_light = not self.is_dark
if __name__ == '__main__':
c = Candle()
c.run()