1 /* 2 * Author: Jon Trulson <jtrulson (at) 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 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
