ttp223: Grove touch sensor and examples

Added support for the TTP223 touch detector-based sensors
(like the Grove touch sensor) with corresponding examples
in C++, JavaScript, and Python.

Signed-off-by: Sarah Knepper <sarah.knepper@intel.com>

examples/python/ttp223.py

@@ -0,0 +1,39 @@
+# Author: Sarah Knepper <sarah.knepper@intel.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
+import pyupm_ttp223 as ttp223
+
+# Create the TTP223 touch sensor object using GPIO pin 0
+touch = ttp223.TTP223(0)
+
+# Check whether or not a finger is near the touch sensor and
+# print accordingly, waiting one second between readings
+while 1:
+    if touch.isPressed():
+        print touch.name(), 'is pressed'
+    else:
+        print touch.name(), 'is not pressed'
+    time.sleep(1)
+
+# Delete the touch sensor object
+del touch