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package com.diozero.devices;
/*
* #%L
* Organisation: diozero
* Project: Device I/O Zero - Core
* Filename: PwmLed.java
*
* This file is part of the diozero project. More information about this project
* can be found at http://www.diozero.com/
* %%
* Copyright (C) 2016 - 2021 diozero
* %%
* 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.
* #L%
*/
import com.diozero.api.PwmOutputDevice;
import com.diozero.api.RuntimeIOException;
import com.diozero.internal.spi.PwmOutputDeviceFactoryInterface;
/**
* PWM controlled LED. @see com.diozero.sampleapps.PwmLedTest PwmLedTest
*/
public class PwmLed extends PwmOutputDevice {
/**
* @param gpio
* The GPIO to which the LED is attached to.
* @throws RuntimeIOException
* If an I/O error occurred.
*/
public PwmLed(int gpio) throws RuntimeIOException {
this(gpio, 0);
}
/**
* @param gpio
* The GPIO to which the LED is attached to.
* @param initialValue
* Initial PWM output value (range 0..1).
* @throws RuntimeIOException
* If an I/O error occurred.
*/
public PwmLed(int gpio, float initialValue) throws RuntimeIOException {
super(gpio, initialValue);
}
/**
* @param deviceFactory
* Device factory to use to provision this device.
* @param gpio
* The GPIO to which the LED is attached to.
* @throws RuntimeIOException
* If an I/O error occurred.
*/
public PwmLed(PwmOutputDeviceFactoryInterface deviceFactory, int gpio) throws RuntimeIOException {
this(deviceFactory, gpio, 0);
}
/**
* @param deviceFactory
* Device factory to use to provision this device.
* @param gpio
* The GPIO to which the LED is attached to.
* @param initialValue
* Initial PWM output value (range 0..1).
* @throws RuntimeIOException
* If an I/O error occurred.
*/
public PwmLed(PwmOutputDeviceFactoryInterface deviceFactory, int gpio, float initialValue)
throws RuntimeIOException {
super(deviceFactory, gpio, initialValue);
}
/**
* Blink the LED on and off indefinitely.
*
* @throws RuntimeIOException
* If an I/O error occurred.
*/
public void blink() throws RuntimeIOException {
blink(1, 1, INFINITE_ITERATIONS, true);
}
/**
* Blink the LED on and off repeatedly.
*
* @param onTime
* On time in seconds.
* @param offTime
* Off time in seconds.
* @param iterations
* Number of iterations. Set to <0 to blink indefinitely.
* @param background
* If true start a background thread to control the blink and
* return immediately. If false, only return once the blink
* iterations have finished.
* @throws RuntimeIOException
* If an I/O error occurred.
*/
public void blink(float onTime, float offTime, int iterations, boolean background) throws RuntimeIOException {
onOffLoop(onTime, offTime, iterations, background);
}
/**
* Pulse the LED on and off indefinitely in a background thread with a fade time of 1 second.
*
* @throws RuntimeIOException
* If an I/O error occurred.
*/
public void pulse() throws RuntimeIOException {
pulse(1, 50, INFINITE_ITERATIONS, true);
}
/**
* Pulse the LED on and off repeatedly.
*
* @param fadeTime
* Time in seconds from fully on to fully off.
* @param steps
* Number of steps between fully on to fully off.
* @param iterations
* Number of times to fade in and out.
* @param background
* If true start a background thread to control the blink and
* return immediately. If false, only return once the blink
* iterations have finished.
* @throws RuntimeIOException
* If an I/O error occurred.
*/
public void pulse(float fadeTime, int steps, int iterations, boolean background) throws RuntimeIOException {
fadeInOutLoop(fadeTime, steps, iterations, background);
}
/**
* Return true if the PWM value is >0.
*
* @return True if >0, false if 0.
* @throws RuntimeIOException
* If an I/O error occurred.
*/
public boolean isLit() throws RuntimeIOException {
return isOn();
}
}
