From fb8dd8ad859f059b1256d07bd32205357ffce300 Mon Sep 17 00:00:00 2001 From: Zion Orent Date: Thu, 15 Jan 2015 14:26:13 -0800 Subject: [PATCH] hmc5883l: JavaScript example file for hmc5883l 3-axis compass Signed-off-by: Zion Orent Signed-off-by: Jon Trulson Signed-off-by: Sarah Knepper --- examples/javascript/hmc5883l.js | 61 +++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 examples/javascript/hmc5883l.js diff --git a/examples/javascript/hmc5883l.js b/examples/javascript/hmc5883l.js new file mode 100644 index 00000000..c70a60da --- /dev/null +++ b/examples/javascript/hmc5883l.js @@ -0,0 +1,61 @@ +/*jslint node:true, vars:true, bitwise:true, unparam:true */ +/*jshint unused:true */ +/*global */ +/* +* Author: Zion Orent +* Copyright (c) 2014 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 Compass module +var hmc5883l = require('jsupm_hmc5883l'); +// load this on i2c +var myCompass = new hmc5883l.Hmc5883l(0); +// Set your declination from true north in radians +myCompass.set_declination(0.2749); + +var coordsObj; +// Print out the coordinates, heading, and direction every second +setInterval(function() +{ + myCompass.update(); // Update the coordinates + coordsObj = myCompass.coordinates(); + var coords = (coordsObj.getitem(0) + " "); + coords += (coordsObj.getitem(1) + " "); + coords += coordsObj.getitem(2); + var heading = round2Digits(myCompass.heading()); + var direction = round2Digits(myCompass.direction()); + var compassResults = "coords: " + coords + + " heading: " + heading + " direction " + direction; + console.log(compassResults); +}, 1000); + +function round2Digits(num) +{ + return Math.round((num + 0.00001) * 100) / 100; +} + +// Print message when exiting +process.on('SIGINT', function() +{ + console.log("Exiting..."); + process.exit(0); +});