interrupt

package mygpio05;

import com.pi4j.io.gpio.GpioController;

import com.pi4j.io.gpio.GpioFactory;

import com.pi4j.io.gpio.GpioPin;

import com.pi4j.io.gpio.GpioPinDigitalInput;

import com.pi4j.io.gpio.GpioPinDigitalOutput;

import com.pi4j.io.gpio.PinPullResistance;

import com.pi4j.io.gpio.PinState;

import com.pi4j.io.gpio.RaspiPin;

import com.pi4j.io.gpio.event.GpioPinDigitalStateChangeEvent;

import com.pi4j.io.gpio.event.GpioPinListenerDigital;

import com.pi4j.io.gpio.trigger.GpioSetStateTrigger;

public class MyGPIO05 {

    public static void main(String[] args) {

        System.out.println("MyGPIO05 start...");

        // 建立GPIO控制物件

        final GpioController gpio = GpioFactory.getInstance();

        // 建立控制GPIO_01輸入的物件

        final GpioPinDigitalInput pin01 = 

                gpio.provisionDigitalInputPin(RaspiPin.GPIO_01, 

                        PinPullResistance.PULL_DOWN);

        // 建立控制GPIO_02輸入的物件

        final GpioPinDigitalInput pin02 = 

                gpio.provisionDigitalInputPin(RaspiPin.GPIO_02, 

                        PinPullResistance.PULL_DOWN);

        // 建立控制GPIO_03輸出的物件

        final GpioPinDigitalOutput pin03 = gpio.provisionDigitalOutputPin(

                        RaspiPin.GPIO_03, "LED", PinState.LOW);

        // 宣告與建立GPIO_01使用的監聽物件

        GpioPinListenerDigital pin01Listener = new GpioPinListenerDigital() {

            private int count = 0;

            @Override

            public void handleGpioPinDigitalStateChangeEvent(

                    GpioPinDigitalStateChangeEvent event) {

                // 如果GPIO_01接收到3.3V的電壓

                if (event.getState().isHigh()) {

                    System.out.println("Hello! " + ++count);

                }

            }

        };

        // 註冊GPIO_01的監聽物件

        pin01.addListener(pin01Listener);        

        // 宣告與建立GPIO_02使用的監聽物件

        GpioPinListenerDigital pin02Listener = new GpioPinListenerDigital() {

            @Override

            public void handleGpioPinDigitalStateChangeEvent(

                    GpioPinDigitalStateChangeEvent event) {

                // 讀取發生事件的GPIO針腳與狀態

                GpioPin pin = event.getPin();

                PinState state = event.getState();

                System.out.println("handleGpioPinDigitalStateChangeEvent: ");

                System.out.println("\t" + pin.getName());

                System.out.println("\t" + state.getName());

                // 如果GPIO_02接收到3.3V的電壓

                if (state.isHigh()) {

                    gpio.shutdown();

                    System.out.println("MyGPIO04 bye...");

                    System.exit(0);

                }

            }

        };

        // 註冊GPIO_02的監聽物件

        pin02.addListener(pin02Listener);

        // 為GPIO_01設定觸發事件，GPIO_01為HIGH的時候，也把GPIO_03設定為HIGH

        pin01.addTrigger(new GpioSetStateTrigger(PinState.HIGH, pin03, PinState.HIGH));

        // 為GPIO_01設定觸發事件，GPIO_01為LOW的時候，也把GPIO_03設定為LOW

        pin01.addTrigger(new GpioSetStateTrigger(PinState.LOW, pin03, PinState.LOW));

        // 記得要加入這個迴圈，不然程式執行以後就結束了

        while (true) {

            delay(500);

        }

    }

    private static void delay(int ms) {

        try {

            Thread.sleep(ms);

        }

        catch (InterruptedException e) {

            System.out.println(e.toString());

        }

    }