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https://github.com/processing/processing4.git
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gohai
dbdeb9cf66
Some measurements with a logic analyzer and the Raspberry Pi 2 sleep: 0.001500, measured avg: 0.0015357, measured 0.95 perc.: 0.0015573 sleep: 0.0185, measured avg: 0.0186177, measured 0.95 perc.: 0.0186345 servo_pulse_oversleep was set to account for the (expected) overhead of waking up and toggling the pin with help from the numbers above.
76 lines
2.7 KiB
Java
76 lines
2.7 KiB
Java
/* -*- mode: java; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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Copyright (c) The Processing Foundation 2015
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Hardware I/O library developed by Gottfried Haider as part of GSoC 2015
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General
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Public License along with this library; if not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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Boston, MA 02111-1307 USA
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*/
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package processing.io;
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public class NativeInterface {
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protected static boolean loaded = false;
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protected static boolean alwaysSimulate = false;
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public static void loadLibrary() {
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if (!loaded) {
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if (isSimulated()) {
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System.err.println("The Processing I/O library is not supported on this platform. Instead of values from actual hardware ports, your sketch will only receive stand-in values that allow you to test the remainder of its functionality.");
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} else {
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System.loadLibrary("processing-io");
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}
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loaded = true;
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}
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}
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public static void alwaysSimulate() {
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alwaysSimulate = true;
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}
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public static boolean isSimulated() {
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return alwaysSimulate ||
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!"Linux".equals(System.getProperty("os.name"));
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}
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public static native int openDevice(String fn);
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public static native String getError(int errno);
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public static native int closeDevice(int handle);
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// the following two functions were done in native code to get access to the
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// specifc error number (errno) that might occur
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public static native int readFile(String fn, byte[] in);
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public static native int writeFile(String fn, byte[] out);
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public static int writeFile(String fn, String out) {
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return writeFile(fn, out.getBytes());
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}
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/* GPIO */
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public static native int pollDevice(String fn, int timeout);
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/* I2C */
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public static native int transferI2c(int handle, int slave, byte[] out, byte[] in);
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/* SoftwareServo */
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public static native long servoStartThread(int gpio, int pulse, int period);
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public static native int servoUpdateThread(long handle, int pulse, int period);
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public static native int servoStopThread(long handle);
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/* SPI */
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public static native int setSpiSettings(int handle, int maxSpeed, int dataOrder, int mode);
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public static native int transferSpi(int handle, byte[] out, byte[] in);
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}
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