java: added example BlinkOnboard based on blink_onboard.c

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

diff --git a/examples/java/BlinkOnboard.java b/examples/java/BlinkOnboard.java
new file mode 100644 (file)
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+++ b/examples/java/BlinkOnboard.java
@@ -0,0 +1,76 @@
+/*
+ * 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 BlinkOnboard {
+  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_platform_t platform = mraa.mraa.getPlatformType();
+    mraa.Gpio gpio, gpio_in;
+    if (platform == mraa.mraa_platform_t.INTEL_GALILEO_GEN1) {
+      gpio = new mraa.Gpio(3);
+    } else if (platform == mraa.mraa_platform_t.INTEL_MINNOWBOARD_MAX) {
+      gpio = new mraa.Gpio(21);
+    } else {
+      gpio = new mraa.Gpio(13);
+    }
+    System.out.format("Welcome to libmraa\n Version: %s\n Running on %s\n",
+                      mraa.mraa.getVersion(), platform.toString());
+
+    gpio.dir(mraa.Dir.DIR_OUT);
+    // on platforms with physical button use gpio_in
+    if (platform == mraa.mraa_platform_t.INTEL_MINNOWBOARD_MAX) {
+      gpio_in = new mraa.Gpio(14);
+      gpio_in.dir(mraa.Dir.DIR_IN);
+      System.out.println("Press and hold S1 to stop, Press SW1 to shutdown!");
+    } else {
+      gpio_in = null;
+    }
+
+    boolean state = false;
+    while (true) {
+      if (gpio_in != null && gpio_in.read() == 0) {
+        return;
+      }
+      if (state) {
+        state = false;
+        gpio.write(1);
+      } else {
+        state = true;
+        gpio.write(0);
+      }
+      Thread.sleep(1000);
+    }
+  }
+}
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