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      1 #!/usr/bin/python
      2 # Author: Zion Orent <zorent (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_groveelectromagnet as upmGroveelectromagnet
     26 
     27 # This was tested with the Grove Electromagnetic Module
     28 # Instantiate a Grove Electromagnet on digital pin D2
     29 myElectromagnet = upmGroveelectromagnet.GroveElectromagnet(2)
     30 
     31 
     32 ## Exit handlers ##
     33 # This stops python from printing a stacktrace when you hit control-C
     34 def SIGINTHandler(signum, frame):
     35 	raise SystemExit
     36 
     37 # This lets you run code on exit,
     38 # including functions from myElectromagnet
     39 def exitHandler():
     40 	print "Exiting"
     41 	myElectromagnet.off()
     42 	sys.exit(0)
     43 
     44 # Register exit handlers
     45 atexit.register(exitHandler)
     46 signal.signal(signal.SIGINT, SIGINTHandler)
     47 
     48 
     49 magnetState = False
     50 
     51 # Turn magnet on and off every 5 seconds
     52 while(1):
     53 	magnetState = not magnetState
     54 	if (magnetState):
     55 		myElectromagnet.on()
     56 	else:
     57 		myElectromagnet.off()
     58 	print "Turning magnet", ("on" if magnetState else "off")
     59 
     60 	time.sleep(5)
     61