com.diozero.internal.provider.wiringpi.WiringPiRawPerfTest Maven / Gradle / Ivy
package com.diozero.internal.provider.wiringpi;
/*
* #%L
* Device I/O Zero - wiringPi provider
* %%
* Copyright (C) 2016 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
* 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.pi4j.wiringpi.Gpio;
import com.pi4j.wiringpi.GpioUtil;
public class WiringPiRawPerfTest {
private static final int DEFAULT_ITERATIONS = 5_000_000;
public static void main(String[] args) {
if (args.length < 1) {
System.out.println("Usage: " + WiringPiRawPerfTest.class.getName() + " []");
System.exit(1);
}
final int pin = Integer.parseInt(args[0]);
final int iterations = args.length > 1 ? Integer.parseInt(args[1]) : DEFAULT_ITERATIONS;
Gpio.wiringPiSetupGpio();
if (GpioUtil.isExported(pin)) {
GpioUtil.setDirection(pin, GpioUtil.DIRECTION_OUT);
} else {
GpioUtil.export(pin, GpioUtil.DIRECTION_OUT);
}
Gpio.pinMode(pin, Gpio.OUTPUT);
for (int j=0; j<5; j++) {
long start_nano = System.nanoTime();
for (int i=0; i