/* -*- mode: java; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
Copyright (c) The Processing Foundation 2015
Hardware I/O library developed by Gottfried Haider as part of GSoC 2015
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
*/
package processing.io;
public class NativeInterface {
protected static boolean loaded = false;
protected static boolean alwaysSimulate = false;
public static void loadLibrary() {
if (!loaded) {
if (isSimulated()) {
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.");
} else {
System.loadLibrary("processing-io");
}
loaded = true;
}
}
public static void alwaysSimulate() {
alwaysSimulate = true;
}
public static boolean isSimulated() {
return alwaysSimulate ||
!"Linux".equals(System.getProperty("os.name"));
}
public static native int openDevice(String fn);
public static native String getError(int errno);
public static native int closeDevice(int handle);
// the following two functions were done in native code to get access to the
// specifc error number (errno) that might occur
public static native int readFile(String fn, byte[] in);
public static native int writeFile(String fn, byte[] out);
public static int writeFile(String fn, String out) {
return writeFile(fn, out.getBytes());
}
/* GPIO */
public static native int pollDevice(String fn, int timeout);
/* I2C */
public static native int transferI2c(int handle, int slave, byte[] out, byte[] in);
/* SoftwareServo */
public static native long servoStartThread(int gpio, int pulse, int period);
public static native int servoUpdateThread(long handle, int pulse, int period);
public static native int servoStopThread(long handle);
/* SPI */
public static native int setSpiSettings(int handle, int maxSpeed, int dataOrder, int mode);
public static native int transferSpi(int handle, byte[] out, byte[] in);
}