java: added example CyclePwm3 based on cycle-pwm3.c

Signed-off-by: Jakub Kramarz <jkramarz@virtuslab.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

examples/java/CyclePwm3.java

@@ -0,0 +1,54 @@
+/*
+ * Author: Brendan Le Foll <brendan.le.foll@intel.com>
+ * Copyright (c) 2014 Intel Corporation.
+ * Author: Jakub Kramarz <jkramarz@virtuslab.com>
+ * Copyright (c) 2015 VirtusLab
+ *
+ * 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.
+ */
+
+public class CyclePwm3 {
+  static {
+    try {
+      System.loadLibrary("mraajava");
+    } catch (UnsatisfiedLinkError e) {
+      System.err.println(
+          "Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" +
+          e);
+      System.exit(1);
+    }
+  }
+  public static void main(String argv[]) throws InterruptedException {
+    mraa.mraa.init();
+    mraa.Pwm pwm = new mraa.Pwm(3);
+    pwm.period_us(200);
+    pwm.enable(true);
+
+    float value = 0;
+    while (true) {
+      value += 0.01;
+      pwm.write(value);
+      Thread.sleep(50);
+      if (value >= 1) {
+        value = 0;
+      }
+    }
+  }
+}