com.diozero.internal.provider.builtin.NativeGpioOutputDevice Maven / Gradle / Ivy
package com.diozero.internal.provider.builtin;
/*-
* #%L
* Organisation: diozero
* Project: diozero - Core
* Filename: NativeGpioOutputDevice.java
*
* This file is part of the diozero project. More information about this project
* can be found at https://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
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* #L%
*/
import com.diozero.api.PinInfo;
import com.diozero.api.RuntimeIOException;
import com.diozero.internal.provider.builtin.gpio.GpioChip;
import com.diozero.internal.provider.builtin.gpio.GpioLine;
import com.diozero.internal.spi.AbstractDevice;
import com.diozero.internal.spi.GpioDigitalOutputDeviceInterface;
import com.diozero.internal.spi.MmapGpioInterface;
public class NativeGpioOutputDevice extends AbstractDevice implements GpioDigitalOutputDeviceInterface {
private int gpio;
private GpioLine line;
private MmapGpioInterface mmapGpio;
public NativeGpioOutputDevice(DefaultDeviceFactory deviceFactory, String key, GpioChip chip, PinInfo pinInfo,
boolean initialValue, MmapGpioInterface mmapGpio) {
super(key, deviceFactory);
this.mmapGpio = mmapGpio;
gpio = pinInfo.getDeviceNumber();
int offset = pinInfo.getLineOffset();
if (offset == PinInfo.NOT_DEFINED) {
throw new IllegalArgumentException("Line offset not defined for pin " + pinInfo);
}
line = chip.provisionGpioOutputDevice(offset, initialValue ? 1 : 0);
}
@Override
public int getGpio() {
return gpio;
}
@Override
public boolean getValue() throws RuntimeIOException {
if (mmapGpio == null) {
return line.getValue() == 0 ? false : true;
}
return mmapGpio.gpioRead(gpio);
}
@Override
public void setValue(boolean value) throws RuntimeIOException {
if (mmapGpio == null) {
line.setValue(value ? 1 : 0);
} else {
mmapGpio.gpioWrite(gpio, value);
}
}
@Override
public void closeDevice() {
line.close();
}
}