ublox6: python example for ublox6 GPS sensor

Signed-off-by: Zion Orent <zorent@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

examples/python/ublox6.py

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+#!/usr/bin/python
+# Author: Zion Orent <zorent@ics.com>
+# Copyright (c) 2015 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_ublox6 as upmUblox6
+
+# Instantiate a Ublox6 GPS device on uart 0.
+myGPSSensor = upmUblox6.Ublox6(0)
+
+
+## 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, including functions from myGPSSensor
+def exitHandler():
+	print "Exiting"
+	sys.exit(0)
+
+# Register exit handlers
+atexit.register(exitHandler)
+signal.signal(signal.SIGINT, SIGINTHandler)
+
+
+if (not myGPSSensor.setupTty(upmUblox6.cvar.int_B9600)):
+	print "Failed to setup tty port parameters"
+	sys.exit(0)
+
+# Collect and output NMEA data.
+
+# This device also supports numerous configuration options, which
+# you can set with writeData().  Please refer to the Ublox-6 data
+# sheet for further information on the formats of the data sent and
+# received, and the various operating modes available.
+
+
+bufferLength = 256
+nmeaBuffer = upmUblox6.charArray(bufferLength)
+
+def getGPSInfo():
+	# we don't want the read to block in this example, so always
+	# check to see if data is available first.
+	if (myGPSSensor.dataAvailable()):
+		rv = myGPSSensor.readData(nmeaBuffer, bufferLength)
+
+		numlines= 0
+		if (rv > 0):
+			GPSData = ""
+			# read only the number of characters
+			# specified by myGPSSensor.readData
+			for x in range(rv):
+				GPSData += nmeaBuffer.__getitem__(x)
+			sys.stdout.write(GPSData)
+
+		if (rv < 0): # some sort of read error occured
+			print "Port read error."
+			sys.exit(0)
+
+while (1):
+	getGPSInfo()
+	time.sleep(.1)