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This library implements generic support for the pca9685 16 channel 12 bit PWM LED controller. This controller is used on some Adafruit motor shields. Signed-off-by: Jon Trulson <jtrulson@ics.com> Signed-off-by: Zion Orent <zorent@ics.com> Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2015 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <unistd.h>
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#include <signal.h>
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#include <iostream>
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#include "pca9685.h"
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using namespace std;
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int main(int argc, char **argv)
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{
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//! [Interesting]
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// Instantiate an PCA9685 on I2C bus 0
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upm::PCA9685 *leds = new upm::PCA9685(PCA9685_I2C_BUS,
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PCA9685_DEFAULT_I2C_ADDR);
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// put device to sleep
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leds->setModeSleep(true);
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// setup a period of 50Hz
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leds->setPrescaleFromHz(50);
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// wake device up
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leds->setModeSleep(false);
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// Setup a 50% duty cycle -- on time at 0, off time at 2048 (4096 / 2)
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// Set for all channels
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leds->ledOnTime(PCA9685_ALL_LED, 0);
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leds->ledOffTime(PCA9685_ALL_LED, 2048);
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// but, turn channel 3 full off and channel 4 full on
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cout << "Turning channel 3 off, and channel 4 on." << endl;
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cout << "All other channels will be PWM'd at a 50% duty cycle." << endl;
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leds->ledFullOff(3, true);
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leds->ledFullOn(4, true);
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// now, just sleep for 5 seconds, reset channels 3 and 4, and exit.
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cout << "Sleeping for 5 seconds..." << endl;
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sleep(5);
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cout << "Exiting..." << endl;
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// clear the bits we set earlier
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leds->ledFullOff(3, false);
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leds->ledFullOn(4, false);
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//! [Interesting]
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delete leds;
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return 0;
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}
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