bmx055, bmi055, bmc160, bma250e, bmg150, bmm150: Initial implementation

This module (bmx055) implements support for the following core Bosch
chipsets:

bma250e - accelerometer, 3 variants (chip id's 0x03, 0xf9, and 0xfa)
bmm150 - magnetometer
bmg160 - gyroscope

The other 3 devices are combinations of the above:

bmx055 - accel/gyro/mag
bmc160 - accel/mag
bmi055 - accel/gyro

...for 6 devices total.

For the combination devices, all of the sub-devices appear as
individual independent devices on the I2C/SPI bus.

The combination drivers provide basic configuration and data output.
For more detailed control as well as interrupt support, you should use
the core device drivers (accel/gyro/mag) directly.

These devices support both I2C and SPI communications.  They must be
powered at 3.3vdc.

Signed-off-by: Jon Trulson <jtrulson@ics.com>

examples/python/bmx055.py

@@ -0,0 +1,71 @@
+#!/usr/bin/python
+# Author: Jon Trulson <jtrulson@ics.com>
+# Copyright (c) 2016 Intel Corporation.
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+import time, sys, signal, atexit
+import pyupm_bmx055 as sensorObj
+
+# Instantiate a BMX055 instance using default i2c bus and address
+sensor = sensorObj.BMX055()
+
+## Exit handlers ##
+# This function stops python from printing a stacktrace when you hit control-C
+def SIGINTHandler(signum, frame):
+	raise SystemExit
+
+# This function lets you run code on exit
+def exitHandler():
+	print "Exiting"
+	sys.exit(0)
+
+# Register exit handlers
+atexit.register(exitHandler)
+signal.signal(signal.SIGINT, SIGINTHandler)
+
+x = sensorObj.new_floatp()
+y = sensorObj.new_floatp()
+z = sensorObj.new_floatp()
+
+# now output data every 250 milliseconds
+while (1):
+        sensor.update()
+
+        sensor.getAccelerometer(x, y, z)
+        print "Accelerometer x:", sensorObj.floatp_value(x),
+        print " y:", sensorObj.floatp_value(y),
+        print " z:", sensorObj.floatp_value(z),
+        print " g"
+
+        sensor.getGyroscope(x, y, z)
+        print "Gyroscope x:", sensorObj.floatp_value(x),
+        print " y:", sensorObj.floatp_value(y),
+        print " z:", sensorObj.floatp_value(z),
+        print " degrees/s"
+
+        sensor.getMagnetometer(x, y, z)
+        print "Magnetometer x:", sensorObj.floatp_value(x),
+        print " y:", sensorObj.floatp_value(y),
+        print " z:", sensorObj.floatp_value(z),
+        print " uT"
+
+        print
+	time.sleep(.250)