com.diozero.internal.provider.mmap.MmapDigitalInputOutputDevice Maven / Gradle / Ivy
package com.diozero.internal.provider.mmap;
/*
* #%L
* Organisation: mattjlewis
* Project: Device I/O Zero - High performance mmap GPIO control
* Filename: MmapDigitalInputOutputDevice.java
*
* This file is part of the diozero project. More information about this project
* can be found at http://www.diozero.com/
* %%
* Copyright (C) 2016 - 2017 mattjlewis
* %%
* 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
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
import com.diozero.api.DeviceMode;
import com.diozero.api.GpioPullUpDown;
import com.diozero.api.PinInfo;
import com.diozero.internal.provider.MmapGpioInterface;
import com.diozero.internal.provider.sysfs.SysFsDigitalInputOutputDevice;
import com.diozero.util.RuntimeIOException;
public class MmapDigitalInputOutputDevice extends SysFsDigitalInputOutputDevice {
private MmapDeviceFactory mmapDeviceFactory;
private MmapGpioInterface mmapGpio;
private GpioPullUpDown pud;
public MmapDigitalInputOutputDevice(MmapDeviceFactory deviceFactory, String key,
PinInfo pinInfo, DeviceMode mode) {
super(deviceFactory, key, pinInfo, mode);
this.mmapDeviceFactory = deviceFactory;
mmapGpio = mmapDeviceFactory.getMmapGpio();
// For when mode is set to input
this.pud = GpioPullUpDown.NONE;
setMode(mode);
}
@Override
public void setMode(DeviceMode mode) {
super.setMode(mode);
if (mode == DeviceMode.DIGITAL_INPUT) {
mmapGpio.setPullUpDown(gpio, pud);
}
}
@Override
public boolean getValue() throws RuntimeIOException {
return mmapGpio.gpioRead(gpio);
}
@Override
public void setValue(boolean value) throws RuntimeIOException {
if (mode != DeviceMode.DIGITAL_OUTPUT) {
throw new IllegalStateException("Can only set output value for digital output pins (mode=" + mode + ")");
}
mmapGpio.gpioWrite(gpio, value);
}
}