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