1765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang#!/usr/bin/python 2765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# Author: Zion Orent <zorent@ics.com> 3765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# Copyright (c) 2015 Intel Corporation. 4765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# 5765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# Permission is hereby granted, free of charge, to any person obtaining 6765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# a copy of this software and associated documentation files (the 7765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# "Software"), to deal in the Software without restriction, including 8765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# without limitation the rights to use, copy, modify, merge, publish, 9765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# distribute, sublicense, and/or sell copies of the Software, and to 10765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# permit persons to whom the Software is furnished to do so, subject to 11765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# the following conditions: 12765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# 13765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# The above copyright notice and this permission notice shall be 14765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# included in all copies or substantial portions of the Software. 15765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# 16765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 24765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangimport time, sys, signal, atexit 25765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangimport pyupm_ppd42ns as upmPpd42ns 26765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 27765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# Instantiate a dust sensor on digital pin D8 28765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun ZhangmyDustSensor = upmPpd42ns.PPD42NS(8) 29765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 30765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 31765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang## Exit handlers ## 32765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# This function stops python from printing a stacktrace when you hit control-C 33765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangdef SIGINTHandler(signum, frame): 34765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang raise SystemExit 35765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 36765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# This function lets you run code on exit, including functions from myDustSensor 37765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangdef exitHandler(): 38765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang print "Exiting" 39765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang sys.exit(0) 40765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 41765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang# Register exit handlers 42765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangatexit.register(exitHandler) 43765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangsignal.signal(signal.SIGINT, SIGINTHandler) 44765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 45765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 46765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangnotice = ("This program will give readings " 47765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang"every 30 seconds until you stop it") 48765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangprint notice 49765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang 50765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhangwhile(1): 51765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang data = myDustSensor.getData() 52765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang # we need to sleep for a bit for the data to print out 53765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang time.sleep(.1) 54765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang print "Low pulse occupancy: " + str(data.lowPulseOccupancy) 55765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang print "Ratio: " + str(data.ratio) 56765adb95dc941c32690d6c43bc08b9d07d197fcbJianxun Zhang print "Concentration: " + str(data.concentration) 57