HCSR04: Modifying implementation and adding examples

Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>

examples/javascript/hcsr04.js

@@ -0,0 +1,41 @@
+/*
+* Author: Abhishek Malik <abhishek.malik@intel.com>
+* Copyright (c) 2017 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.
+*/
+
+var HCSR04 = require('jsupm_hcsr04');
+
+// Instantiate a HCSR04 ultrasonic distance sensor on digital pins D2 and D4
+var myHCSR04 = new HCSR04.HCSR04(2, 4);
+
+// Check every second for the presence of a magnetic field (south polarity)
+setInterval(function()
+{
+        console.log("Distance: " + myHCSR04.getDistance(0));
+}, 1000);
+
+// Print message when exiting
+process.on('SIGINT', function()
+{
+	console.log("Exiting...");
+	process.exit(0);
+});