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      1 /*jslint node:true, vars:true, bitwise:true, unparam:true */
      2 /*jshint unused:true */
      3 /*
      4 * Author: Jon Trulson <jtrulson (at) ics.com>
      5 * Copyright (c) 2015 Intel Corporation.
      6 *
      7 * Permission is hereby granted, free of charge, to any person obtaining
      8 * a copy of this software and associated documentation files (the
      9 * "Software"), to deal in the Software without restriction, including
     10 * without limitation the rights to use, copy, modify, merge, publish,
     11 * distribute, sublicense, and/or sell copies of the Software, and to
     12 * permit persons to whom the Software is furnished to do so, subject to
     13 * the following conditions:
     14 *
     15 * The above copyright notice and this permission notice shall be
     16 * included in all copies or substantial portions of the Software.
     17 *
     18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     21 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
     22 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     23 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     24 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     25 */
     26 
     27 // JavaScript example for the MaxSonar-EZ family of ultrasonic range finders
     28 
     29 // analog voltage, usually 3.3 or 5.0
     30 var MAXSONAREZ_AREF = 5.0;
     31 
     32 var MaxSonarEZ = require('jsupm_maxsonarez');
     33 
     34 // Instantiate a MaxSonar-EZ on analog pin A1, with an analog
     35 // reference voltage of MAXSONAREZ_AREF
     36 var mySonar = new MaxSonarEZ.MAXSONAREZ(1, MAXSONAREZ_AREF);
     37 
     38 // Every second, sample the sonar and output the distance to an
     39 // object in inches.
     40 
     41 // With the EZ3 version, the minimum and maximum ranges seemed to be
     42 // between 6 and 33 inches
     43 
     44 var myInterval = setInterval(function()
     45 {
     46 	console.log("AREF: " + MAXSONAREZ_AREF +
     47                     ", distance in inches: " + mySonar.inches());
     48 }, 1000);
     49 
     50 // Print message when exiting
     51 process.on('SIGINT', function()
     52 {
     53 	clearInterval(myInterval);
     54 	mySonar = null;
     55 	MaxSonarEZ.cleanUp();
     56 	MaxSonarEZ = null;
     57 	console.log("Exiting...");
     58 	process.exit(0);
     59 });
     60