1 #!/usr/bin/python 2 # Author: Jon Trulson <jtrulson (at] 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 24 import time, sys, signal, atexit 25 import pyupm_maxsonarez as MaxSonarEZ 26 27 # Instantiate a MaxSonar-EZ on analog pin A1, with an analog 28 # reference voltage of MAXSONAREZ_AREF 29 Sonar = MaxSonarEZ.MAXSONAREZ(1) 30 31 ## Exit handlers ## 32 # This stops python from printing a stacktrace when you hit control-C 33 def SIGINTHandler(signum, frame): 34 raise SystemExit 35 36 # This lets you run code on exit, 37 # including functions from Sonar 38 def exitHandler(): 39 print "Exiting" 40 sys.exit(0) 41 42 # Register exit handlers 43 atexit.register(exitHandler) 44 signal.signal(signal.SIGINT, SIGINTHandler) 45 46 47 # analog voltage, usually 3.3 or 5.0 48 MAXSONAREZ_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 56 while (1): 57 print "AREF: {0}, distance in inches: {1}".format( 58 MAXSONAREZ_AREF, 59 Sonar.inches()) 60 time.sleep(1) 61
