text: /*
   * Author: Jon Trulson <jtrulson@ics.com>
   * Copyright (c) 2015 Intel Corporation.
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
   * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  #include <unistd.h>
  #include <signal.h>
  #include <iostream>
  #include "pca9685.hpp"
  
  using namespace std;
  
  int main(int argc, char **argv)
  {
  //! [Interesting]
    // Instantiate an PCA9685 on I2C bus 0
  
    upm::PCA9685 *leds = new upm::PCA9685(PCA9685_I2C_BUS, 
                                          PCA9685_DEFAULT_I2C_ADDR);
  
    // put device to sleep
    leds->setModeSleep(true);
  
    // setup a period of 50Hz
    leds->setPrescaleFromHz(50);
    
    // wake device up
    leds->setModeSleep(false);
  
    // Setup a 50% duty cycle -- on time at 0, off time at 2048 (4096 / 2)
    // Set for all channels
  
    leds->ledOnTime(PCA9685_ALL_LED, 0);
    leds->ledOffTime(PCA9685_ALL_LED, 2048);
  
    // but, turn channel 3 full off and channel 4 full on
  
    cout << "Turning channel 3 off, and channel 4 on." << endl;
    cout << "All other channels will be PWM'd at a 50% duty cycle." << endl;
  
    leds->ledFullOff(3, true);
    leds->ledFullOn(4, true);
  
    // now, just sleep for 5 seconds, reset channels 3 and 4, and exit.
    cout << "Sleeping for 5 seconds..." << endl;
  
    sleep(5);
  
    cout << "Exiting..." << endl;
  
    // clear the bits we set earlier
    leds->ledFullOff(3, false);
    leds->ledFullOn(4, false);
  
  //! [Interesting]
  
    delete leds;
    return 0;
  }
  