1 /*jslint node:true, vars:true, bitwise:true, unparam:true */ 2 /*jshint unused:true */ 3 /* 4 * Author: Zion Orent <zorent (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 var differential_amplifier_lib = require("jsupm_ina132"); 27 28 // Tested with the INA132 Differential Amplifier Sensor module. 29 // Instantiate an INA132 on analog pin A0 30 var differential_amplifier_obj = new differential_amplifier_lib.INA132(0); 31 32 var myInterval = setInterval(function() 33 { 34 console.log(roundNum(differential_amplifier_obj.value(), 5)); 35 }, 1000); 36 37 function roundNum(num, decimalPlaces) 38 { 39 var extraNum = (1 / (Math.pow(10, decimalPlaces) * 1000)); 40 var numerator = Math.round((num + extraNum) * (Math.pow(10, decimalPlaces))); 41 var denominator = Math.pow(10, decimalPlaces); 42 return (numerator / denominator); 43 } 44 45 // When exiting: clear interval, and print message 46 process.on('SIGINT', function() 47 { 48 clearInterval(myInterval); 49 differential_amplifier_obj = null; 50 differential_amplifier_lib.cleanUp(); 51 differential_amplifier_lib = null; 52 console.log("Exiting"); 53 process.exit(0); 54 }); 55
