1#!/usr/bin/python 2# Author: Zion Orent <zorent@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 25import time, sys, signal, atexit 26import pyupm_groveehr as upmGroveehr 27 28# Instantiate a Grove Ear-clip Heart Rate sensor on digital pin D2 29myHeartRateSensor = upmGroveehr.GroveEHR(2) 30 31 32## Exit handlers ## 33# This stops python from printing a stacktrace when you hit control-C 34def SIGINTHandler(signum, frame): 35 raise SystemExit 36 37# This lets you run code on exit, 38# including functions from myHeartRateSensor 39def exitHandler(): 40 myHeartRateSensor.stopBeatCounter() 41 print "Exiting" 42 sys.exit(0) 43 44# Register exit handlers 45atexit.register(exitHandler) 46signal.signal(signal.SIGINT, SIGINTHandler) 47 48 49# set the beat counter to 0, init the clock and start counting beats 50myHeartRateSensor.clearBeatCounter() 51myHeartRateSensor.initClock() 52myHeartRateSensor.startBeatCounter() 53 54while(1): 55 # we grab these (millis and flowCount) just for display 56 # purposes in this example 57 millis = myHeartRateSensor.getMillis() 58 beats = myHeartRateSensor.beatCounter() 59 60 # heartRate() requires that at least 5 seconds pass before 61 # returning anything other than 0 62 fr = myHeartRateSensor.heartRate() 63 64 # output milliseconds passed, beat count, and computed heart rate 65 outputStr = "Millis: {0} Beats: {1} Heart Rate: {2}".format( 66 millis, beats, fr) 67 print outputStr 68 time.sleep(1) 69