io.dvlopt.linux.gpio.GpioEdgeDetection Maven / Gradle / Ivy

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/*
 * Copyright 2018 Adam Helinski
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package io.dvlopt.linux.gpio ;




/**
 * Class representing edge-detection for a GPIO event.
 */
public enum GpioEdgeDetection {


    /**
     * The line is monitored only for rising signals.
     */
    RISING             ( 1 << 0 )                               ,

    /**
     * The line is monitored only for falling signals.
     */
    FALLING            ( 1 << 1 )                               ,

    /**
     * The line is monitored for both rising and falling signals.
     */
    RISING_AND_FALLING ( RISING.flags | FALLING.flags ) ;




    // Package protected internal value.
    //
    int flags ;


    // Private constructor.
    //
    private GpioEdgeDetection( int flags ) {
    
        this.flags = flags ;
    }
}