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*/
26
27function exit()
28{
29	console.log("Exiting");
30
31	if (myLEDController_obj)
32	{
33		// clear the bits we set earlier
34		myLEDController_obj.ledFullOff(3, false);
35		myLEDController_obj.ledFullOn(4, false);
36	}
37	myLEDController_obj = null;
38	if (LEDController_lib)
39	{
40		LEDController_lib.cleanUp();
41		LEDController_lib = null;
42	}
43	process.exit(0);
44}
45
46// The pca9685 is an led controller.
47// It's being used in this case to drive motors.
48var LEDController_lib = require('jsupm_pca9685');
49
50var I2CBus = LEDController_lib.PCA9685_I2C_BUS;
51var I2CAddr = LEDController_lib.PCA9685_DEFAULT_I2C_ADDR;
52// Instantiate an PCA9685 on I2C bus 0
53var myLEDController_obj = new LEDController_lib.PCA9685(I2CBus, I2CAddr);
54
55// put device to sleep
56myLEDController_obj.setModeSleep(true);
57
58// setup a period of 50Hz
59myLEDController_obj.setPrescaleFromHz(50);
60
61// wake device up
62myLEDController_obj.setModeSleep(false);
63
64// Setup a 50% duty cycle -- on time at 0, off time at 2048 (4096 / 2)
65// Set for all channels
66var LEDNum = LEDController_lib.PCA9685_ALL_LED;
67myLEDController_obj.ledOnTime(LEDNum, 0);
68myLEDController_obj.ledOffTime(LEDNum, 2048);
69
70// but, turn channel 3 full off and channel 4 full on
71console.log("Turning channel 3 off, and channel 4 on.");
72console.log("All other channels will be PWM'd at a 50% duty cycle.");
73
74myLEDController_obj.ledFullOff(3, true);
75myLEDController_obj.ledFullOn(4, true);
76
77  // now, just sleep for 5 seconds, reset channels 3 and 4, and exit.
78console.log("Sleeping for 5 seconds...");
79
80setTimeout(exit, 5000);
81
82process.on('SIGINT', function()
83{
84	exit();
85});
86