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Pi4J Java Examples using the Pi4J Library
/*
* #%L
* **********************************************************************
* ORGANIZATION : Pi4J
* PROJECT : Pi4J :: Java Examples
* FILENAME : BroadcomPinNumberingGpioExample.java
*
* This file is part of the Pi4J project. More information about
* this project can be found here: http://www.pi4j.com/
* **********************************************************************
* %%
* Copyright (C) 2012 - 2016 Pi4J
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
import com.pi4j.io.gpio.*;
/**
* This example code demonstrates how to perform simple state
* control of a GPIO pin on the Raspberry Pi.
*
* @author Robert Savage
*/
public class BroadcomPinNumberingGpioExample {
public static void main(String[] args) throws InterruptedException {
System.out.println("<--Pi4J--> GPIO Control Example ... started.");
// in order to use the Broadcom GPIO pin numbering scheme, we need to configure the
// GPIO factory to use a custom configured Raspberry Pi GPIO provider
GpioFactory.setDefaultProvider(new RaspiGpioProvider(RaspiPinNumberingScheme.BROADCOM_PIN_NUMBERING));
// create gpio controller
final GpioController gpio = GpioFactory.getInstance();
// provision broadcom gpio pin #02 as an output pin and turn on
final GpioPinDigitalOutput pin = gpio.provisionDigitalOutputPin(RaspiBcmPin.GPIO_02, "MyLED", PinState.HIGH);
// set shutdown state for this pin
pin.setShutdownOptions(true, PinState.LOW);
System.out.println("--> GPIO state should be: ON");
Thread.sleep(5000);
// turn off gpio pin #01
pin.low();
System.out.println("--> GPIO state should be: OFF");
Thread.sleep(5000);
// toggle the current state of gpio pin #01 (should turn on)
pin.toggle();
System.out.println("--> GPIO state should be: ON");
Thread.sleep(5000);
// toggle the current state of gpio pin #01 (should turn off)
pin.toggle();
System.out.println("--> GPIO state should be: OFF");
Thread.sleep(5000);
// turn on gpio pin #01 for 1 second and then off
System.out.println("--> GPIO state should be: ON for only 1 second");
pin.pulse(1000, true); // set second argument to 'true' use a blocking call
// stop all GPIO activity/threads by shutting down the GPIO controller
// (this method will forcefully shutdown all GPIO monitoring threads and scheduled tasks)
gpio.shutdown();
System.out.println("Exiting BroadcomPinNumberingGpioExample");
}
}
//END SNIPPET: control-gpio-snippet
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