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WordClock_piw.py
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WordClock_piw.py
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#quick, dirty port of https://github.com/jonnyarnold/wordclock/blob/master/inos/wordclock.ino
from Adafruit.Adafruit_I2C import Adafruit_I2C
import Adafruit.Adafruit_MCP230xx as ada
import time
import datetime
import RPi.GPIO as gpio
import os
gpio.setmode(gpio.BCM)
starttime=time.time()
# CONSTANTS
switch = 9
button = 24
#This constant is used as a 'null'
#The code will ignore this value when it is found
pinNoPin = {'z': 0}
#Pin numbers
pinMinFive = {'m': 3}
pinMinTen = {'m': 2}
pinMinutes = {'g': 17}
pinMinQuarter = {'g': 7}
pinMinTwenty = {'g': 22}
pinMinHalf = {'m': 1}
pinMinOClock = {'g': 23}
pinItIs = {'m': 0}
pinPast = {'m': 5}
pinTo = {'m': 4}
pinHourOne = {'m': 6}
pinHourTwo ={'m': 15}
pinHourThree = {'m': 7}
pinHourFour = {'m': 14}
pinHourFive = {'m': 11}
pinHourSix = {'m': 13}
pinHourSeven = {'m': 12}
pinHourEight = {'m': 10}
pinHourNine = {'g': 25}
pinHourTen = {'m': 8}
pinHourEleven = {'m': 9}
pinHourTwelve = {'g': 18}
#All pins
allPins = [pinItIs, pinMinFive, pinMinTen, pinMinQuarter, pinMinTwenty,
pinMinHalf, pinMinOClock, pinPast, pinTo, pinHourOne, pinHourTwo,
pinHourThree, pinHourFour, pinHourFive, pinHourSix, pinHourSeven,
pinHourEight, pinHourNine, pinHourTen, pinHourEleven, pinHourTwelve]
#The hour pins array gives the order that the pins need to be lit up.
hourPins= [pinHourTwelve, pinHourOne, pinHourTwo, pinHourThree, pinHourFour, pinHourFive,
pinHourSix, pinHourSeven, pinHourEight, pinHourNine, pinHourTen,
pinHourEleven ]
#Minute pins are more tricky. The following array shows the sequence of minute pins
minuteSequence = [
[ pinItIs, pinMinOClock ],
[ pinMinFive, pinPast ],
[ pinMinTen, pinPast ],
[ pinMinQuarter, pinPast ],
[ pinMinTwenty, pinPast ],
[ pinMinTwenty, pinMinFive, pinPast ],
[ pinMinHalf, pinPast ],
[ pinMinTwenty, pinMinFive, pinTo ],
[ pinMinTwenty, pinTo ],
[ pinMinQuarter, pinTo ],
[ pinMinTen, pinTo ],
[ pinMinFive, pinTo ] ]
def setup(mcp, gpio, pins):
''' get pins setup and registered'''
for pin in pins:
for k, v in pin.items():
if k == 'g':
gpio.setup(v, gpio.OUT)
else:
mcp.config(v, mcp.OUTPUT)
def startUp(pins):
''' move through all the items and turn them on, turn them off'''
for pin in pins:
for k, v in pin.items():
if k == 'g':
gpio.output(v, True)
time.sleep(0.2)
gpio.output(v, False)
elif k == 'm':
mcp.output(v, True)
time.sleep(0.2)
mcp.output(v, False)
def turnOn(pins):
if pins is not None:
for p in pins:
for k, v in p.items():
if k == 'g':
gpio.output(v, True)
elif k == 'm':
mcp.output(v, True)
def turnOff(pins):
if pins is not None:
for p in pins:
for k, v in p.items():
if k == 'g':
gpio.output(v, False)
elif k == 'm':
mcp.output(v, False)
def SHUTDOWN():
turnOff(allPins)
time.sleep(0.8)
offSeq = [pinItIs, pinMinHalf, pinMinTen]
for i in xrange(0, 2):
turnOn(offSeq)
time.sleep(0.5)
turnOff(offSeq)
time.sleep(0.5)
print("shutting down...")
os.system("sudo shutdown -h now")
class rtc(object):
""" set time via RTC """
def __init__(self):
self.hour = datetime.datetime.now().hour
self.minutes = datetime.datetime.now().minute
self.hourOnIdx = None
self.minuteOnIdx = None
def loop(self):
if gpio.input(switch):
SHUTDOWN()
self.hour = datetime.datetime.now().hour
self.minutes = datetime.datetime.now().minute
if self.minutes > 30:
self.hour += 1
if self.hour > 12:
self.hour = self.hour - 12
if self.hour != self.hourOnIdx:
turnOff(hourPins(self.hourOnIdx))
self.hourOnIdx = self.hour
turnOn(hourPins[self.hourOnIdx])
if self.minutes/5 != self.minuteOnIdx:
turnOff(minuteSequence(self.minuteOnIdx))
self.minuteOnIdx = self.minutes / 5
turnOn(minuteSequence[self.minuteOnIdx / 5])
#http://stackoverflow.com/questions/474528/what-is-the-best-way-to-repeatedly-execute-a-function-every-x-seconds-in-python/25251804#25251804
time.sleep(60.0 - ((time.time() - starttime) % 60.0))
#time.sleep(30) # check time every 30 seconds and increment if necessary
if __name__ == '__main__':
# register MCP to use the 230xx chip (16 gpio expander)
mcp = ada.Adafruit_MCP230XX(address = 0x20, num_gpios = 16)
# initalize our GPIO/MCP-gpio LEDs
setup(mcp, gpio, allPins)
gpio.setup(switch, gpio.IN)
clockRTC = rtc()
#unused button.
#gpio.setup(button, gpio.IN)
#gpio.add_event_detect(button, gpio.RISING, callback=clock.moveTime, bouncetime=200)
# Sanity check at startup, turn all pins on and off
startUp(allPins)
while True:
clockRTC.loop()