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      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 
     27 var HBridge_lib = require('jsupm_l298');
     28 
     29 // Instantiate one of the 2 possible DC motors on a L298 Dual
     30 // H-Bridge.  For controlling a stepper motor, see the l298-stepper
     31 // example.
     32 var myHBridge_obj = new HBridge_lib.L298(3, 4, 7);
     33 
     34 /*****************************
     35  * Instantiate H-bridge object
     36 ******************************/
     37 myHBridge_obj.goForward = function()
     38 {
     39 	console.log("Starting motor at 50% for 3 seconds...");
     40 	myHBridge_obj.setSpeed(50);
     41 	myHBridge_obj.setDirection(HBridge_lib.L298.DIR_CW);
     42 	myHBridge_obj.enable(true);
     43 };
     44 
     45 myHBridge_obj.reverseDirection = function()
     46 {
     47 	console.log("Reversing direction...");
     48 	myHBridge_obj.setDirection(HBridge_lib.L298.DIR_NONE); // fast stop
     49 	myHBridge_obj.setDirection(HBridge_lib.L298.DIR_CCW);
     50 };
     51 
     52 myHBridge_obj.stop = function()
     53 {
     54 	myHBridge_obj.setSpeed(0);
     55 	myHBridge_obj.enable(false);
     56 };
     57 
     58 myHBridge_obj.quit = function()
     59 {
     60 	myHBridge_obj = null;
     61 	HBridge_lib.cleanUp();
     62 	HBridge_lib = null;
     63 	console.log("Exiting");
     64 	process.exit(0);
     65 };
     66 
     67 
     68 /************************
     69  * Run H-bridge!
     70 *************************/
     71 myHBridge_obj.goForward();
     72 setTimeout(myHBridge_obj.reverseDirection, 3000);
     73 setTimeout(function()
     74 {
     75 	myHBridge_obj.stop();
     76 	myHBridge_obj.quit();
     77 }, 6000);
     78