1#!/usr/bin/python 2# Author: Jon Trulson <jtrulson@ics.com> 3# Copyright (c) 2015 Intel Corporation. 4# 5# Permission is hereby granted, free of charge, to any person obtaining 6# a copy of this software and associated documentation files (the 7# "Software"), to deal in the Software without restriction, including 8# without limitation the rights to use, copy, modify, merge, publish, 9# distribute, sublicense, and/or sell copies of the Software, and to 10# permit persons to whom the Software is furnished to do so, subject to 11# the following conditions: 12# 13# The above copyright notice and this permission notice shall be 14# included in all copies or substantial portions of the Software. 15# 16# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 24import time, sys, signal, atexit 25import pyupm_maxsonarez as MaxSonarEZ 26 27# Instantiate a MaxSonar-EZ on analog pin A1, with an analog 28# reference voltage of MAXSONAREZ_AREF 29Sonar = MaxSonarEZ.MAXSONAREZ(1) 30 31## Exit handlers ## 32# This stops python from printing a stacktrace when you hit control-C 33def SIGINTHandler(signum, frame): 34 raise SystemExit 35 36# This lets you run code on exit, 37# including functions from Sonar 38def exitHandler(): 39 print "Exiting" 40 sys.exit(0) 41 42# Register exit handlers 43atexit.register(exitHandler) 44signal.signal(signal.SIGINT, SIGINTHandler) 45 46 47# analog voltage, usually 3.3 or 5.0 48MAXSONAREZ_AREF = 5.0; 49 50# Every second, sample the sonar and output the distance to an 51# object in inches. 52 53# With the EZ3 version, the minimum and maximum ranges seemed to be 54# between 6 and 33 inches 55 56while (1): 57 print "AREF: {0}, distance in inches: {1}".format( 58 MAXSONAREZ_AREF, 59 Sonar.inches()) 60 time.sleep(1) 61