001package com.pi4j.io.gpio.trigger; 002 003/* 004 * #%L 005 * ********************************************************************** 006 * ORGANIZATION : Pi4J 007 * PROJECT : Pi4J :: Java Library (Core) 008 * FILENAME : GpioInverseSyncStateTrigger.java 009 * 010 * This file is part of the Pi4J project. More information about 011 * this project can be found here: http://www.pi4j.com/ 012 * ********************************************************************** 013 * %% 014 * Copyright (C) 2012 - 2013 Pi4J 015 * %% 016 * Licensed under the Apache License, Version 2.0 (the "License"); 017 * you may not use this file except in compliance with the License. 018 * You may obtain a copy of the License at 019 * 020 * http://www.apache.org/licenses/LICENSE-2.0 021 * 022 * Unless required by applicable law or agreed to in writing, software 023 * distributed under the License is distributed on an "AS IS" BASIS, 024 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 025 * See the License for the specific language governing permissions and 026 * limitations under the License. 027 * #L% 028 */ 029 030 031import java.util.List; 032 033import com.pi4j.io.gpio.GpioPin; 034import com.pi4j.io.gpio.GpioPinDigitalOutput; 035import com.pi4j.io.gpio.PinState; 036 037public class GpioInverseSyncStateTrigger extends GpioTriggerBase { 038 039 private final GpioPinDigitalOutput targetPin; 040 041 public GpioInverseSyncStateTrigger(GpioPinDigitalOutput targetPin) { 042 super(); 043 this.targetPin = targetPin; 044 } 045 046 public GpioInverseSyncStateTrigger(PinState state, GpioPinDigitalOutput targetPin) { 047 super(state); 048 this.targetPin = targetPin; 049 } 050 051 public GpioInverseSyncStateTrigger(PinState[] states, GpioPinDigitalOutput targetPin) { 052 super(states); 053 this.targetPin = targetPin; 054 } 055 056 public GpioInverseSyncStateTrigger(List<PinState> states, GpioPinDigitalOutput targetPin) { 057 super(states); 058 this.targetPin = targetPin; 059 } 060 061 public GpioPinDigitalOutput getTargetPin() { 062 return targetPin; 063 } 064 065 @Override 066 public void invoke(GpioPin pin, PinState state) { 067 if (targetPin != null) { 068 if (state == PinState.HIGH) { 069 targetPin.setState(PinState.LOW); 070 } else { 071 targetPin.setState(PinState.HIGH); 072 } 073 } 074 } 075}