1/*jslint node:true, vars:true, bitwise:true, unparam:true */ 2/*jshint unused:true */ 3/* 4* Author: Zion Orent <zorent@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*/ 26var differential_amplifier_lib = require("jsupm_ina132"); 27 28// Tested with the INA132 Differential Amplifier Sensor module. 29// Instantiate an INA132 on analog pin A0 30var differential_amplifier_obj = new differential_amplifier_lib.INA132(0); 31 32var myInterval = setInterval(function() 33{ 34 console.log(roundNum(differential_amplifier_obj.value(), 5)); 35}, 1000); 36 37function 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 46process.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