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/javascript/ttp223.js

@@ -0,0 +1,40 @@
+/*
+ * 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.
+ */
+
+// Load TTP223 touch sensor module
+var sensorModule = require('jsupm_ttp223');
+
+// Create the TTP223 touch sensor object using GPIO pin 0
+var touch = new sensorModule.TTP223(0);
+
+// Check whether or not a finger is near the touch sensor and
+// print accordingly, waiting one second between readings
+function readSensorValue() {
+    if ( touch.isPressed() ) {
+        console.log(touch.name() + " is pressed");
+    } else {
+        console.log(touch.name() + " is not pressed");
+    }
+}
+setInterval(readSensorValue, 1000);