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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_mma7660 as upmMMA7660
     26 
     27 # Instantiate an MMA7660 on I2C bus 0
     28 myDigitalAccelerometer = upmMMA7660.MMA7660(
     29 					upmMMA7660.MMA7660_I2C_BUS, 
     30 					upmMMA7660.MMA7660_DEFAULT_I2C_ADDR);
     31 
     32 
     33 ## Exit handlers ##
     34 # This function stops python from printing a stacktrace when you hit control-C
     35 def SIGINTHandler(signum, frame):
     36 	raise SystemExit
     37 
     38 # This function lets you run code on exit, including functions from myDigitalAccelerometer
     39 def exitHandler():
     40 	print "Exiting"
     41 	sys.exit(0)
     42 
     43 # Register exit handlers
     44 atexit.register(exitHandler)
     45 signal.signal(signal.SIGINT, SIGINTHandler)
     46 
     47 
     48 # place device in standby mode so we can write registers
     49 myDigitalAccelerometer.setModeStandby()
     50 
     51 # enable 64 samples per second
     52 myDigitalAccelerometer.setSampleRate(upmMMA7660.MMA7660.AUTOSLEEP_64)
     53 
     54 # place device into active mode
     55 myDigitalAccelerometer.setModeActive()
     56 
     57 x = upmMMA7660.new_intp()
     58 y = upmMMA7660.new_intp()
     59 z = upmMMA7660.new_intp()
     60 
     61 ax = upmMMA7660.new_floatp()
     62 ay = upmMMA7660.new_floatp()
     63 az = upmMMA7660.new_floatp()
     64 
     65 while (1):
     66 	myDigitalAccelerometer.getRawValues(x, y, z)
     67 	outputStr = ("Raw values: x = {0}"
     68 	" y = {1}" 
     69 	" z = {2}").format(upmMMA7660.intp_value(x),
     70 	upmMMA7660.intp_value(y),
     71 	upmMMA7660.intp_value(z))
     72 	print outputStr
     73 
     74 	myDigitalAccelerometer.getAcceleration(ax, ay, az)
     75 	outputStr = ("Acceleration: x = {0}"
     76 	"g y = {1}"
     77 	"g z = {2}g").format(upmMMA7660.floatp_value(ax),
     78 	upmMMA7660.floatp_value(ay),
     79 	upmMMA7660.floatp_value(az))
     80 	print outputStr
     81 	time.sleep(.5)
     82