1 /*
2 * Author: Jon Trulson <jtrulson@ics.com>
3 * Copyright (c) 2015 Intel Corporation.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include <unistd.h>
26 #include <signal.h>
27 #include <iostream>
28 #include "pca9685.h"
29
30 using namespace std;
31
main(int argc,char ** argv)32 int main(int argc, char **argv)
33 {
34 //! [Interesting]
35 // Instantiate an PCA9685 on I2C bus 0
36
37 upm::PCA9685 *leds = new upm::PCA9685(PCA9685_I2C_BUS,
38 PCA9685_DEFAULT_I2C_ADDR);
39
40 // put device to sleep
41 leds->setModeSleep(true);
42
43 // setup a period of 50Hz
44 leds->setPrescaleFromHz(50);
45
46 // wake device up
47 leds->setModeSleep(false);
48
49 // Setup a 50% duty cycle -- on time at 0, off time at 2048 (4096 / 2)
50 // Set for all channels
51
52 leds->ledOnTime(PCA9685_ALL_LED, 0);
53 leds->ledOffTime(PCA9685_ALL_LED, 2048);
54
55 // but, turn channel 3 full off and channel 4 full on
56
57 cout << "Turning channel 3 off, and channel 4 on." << endl;
58 cout << "All other channels will be PWM'd at a 50% duty cycle." << endl;
59
60 leds->ledFullOff(3, true);
61 leds->ledFullOn(4, true);
62
63 // now, just sleep for 5 seconds, reset channels 3 and 4, and exit.
64 cout << "Sleeping for 5 seconds..." << endl;
65
66 sleep(5);
67
68 cout << "Exiting..." << endl;
69
70 // clear the bits we set earlier
71 leds->ledFullOff(3, false);
72 leds->ledFullOn(4, false);
73
74 //! [Interesting]
75
76 delete leds;
77 return 0;
78 }
79