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This driver was developed for the DFRobot Wheel Encoder, though it could be used for any counting time-based task using a digital i/o pin to generate interrupts. http://www.dfrobot.com/index.php?route=product/product&product_id=98 If you want to use more than one encoder, simply create a class instance for each one. Signed-off-by: Jon Trulson <jtrulson@ics.com> Signed-off-by: sisinty sasmita patra <sisinty.s.patra@intel.com>
55 lines
1.8 KiB
JavaScript
55 lines
1.8 KiB
JavaScript
/*jslint node:true, vars:true, bitwise:true, unparam:true */
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/*jshint unused:true */
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/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2015 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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var sensorObj = require('jsupm_wheelencoder');
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// Instantiate a DFRobot Wheel Encoder on digital pin D2
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var sensor = new sensorObj.WheelEncoder(2);
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// set the counter to 0 and start counting
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sensor.clearCounter();
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sensor.startCounter();
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setInterval(function()
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{
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// output milliseconds passed and current sensor count
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console.log("Millis: " + sensor.getMillis() + " Count: " +
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sensor.counter());
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}, 1000);
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// exit on ^C
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process.on('SIGINT', function()
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{
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sensor = null;
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sensorObj.cleanUp();
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sensorObj = null;
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console.log("Exiting.");
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process.exit(0);
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});
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