up2: adding platform examples for built-in user leds

Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

examples/platform/CMakeLists.txt

@@ -1,6 +1,9 @@
 add_executable (gpio_edison gpio_edison.c)
 target_link_libraries (gpio_edison mraa)
 
+add_executable (up2-leds up2-leds.cpp)
+target_link_libraries (up2-leds mraa)
+
 include_directories(${PROJECT_SOURCE_DIR}/api)
 include_directories(${PROJECT_SOURCE_DIR}/api/mraa)
 

examples/platform/Up2Leds.java

@@ -0,0 +1,87 @@
+/*
+ * Author: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
+ * Copyright (c) 2018 Intel Corporation
+ *
+ * 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.
+ */
+
+import mraa.Led;
+import mraa.Platform;
+import mraa.mraa;
+
+public class Up2Leds {
+    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);
+        }
+    }
+
+    // Define led names and min/max brightness
+    final static String[] ledNames = {"red", "green", "yellow", "blue"};
+    final static int minBrightness = 0;
+    final static int maxBrightness = 255;
+
+    public static void main(String argv[]) throws InterruptedException {
+
+        // Perform a basic platform and version check
+        if (mraa.getPlatformType() != Platform.INTEL_UP2) {
+            System.out.println("This example is meant for the UP Squared board.");
+            System.out.println("Running it on different platforms will likely require code changes!");
+        }
+
+        if (mraa.getVersion().compareTo("v1.9.0") < 0) {
+            System.out.println("You need MRAA version 1.9.0 or newer to run this sample!");
+            System.exit(1);
+        }
+
+        // Define and initialize our LEDs
+        Led[] leds = new Led[ledNames.length];
+        for (int i = 0; i < ledNames.length; i++) {
+            leds[i] = new Led(ledNames[i]);
+        }
+
+        // Add a hook for handling keyboard interrupts and cleanup
+        Runtime.getRuntime().addShutdownHook(new Thread()
+        {
+            @Override
+            public void run()
+            {
+                System.out.println("Exiting...");
+                for (Led led : leds) {
+                    led.setBrightness(minBrightness);
+                }
+            }
+        });
+
+        // Main loop
+        while (!Thread.interrupted()) {
+            for (Led led : leds) {
+                led.setBrightness(maxBrightness);
+                Thread.sleep(200);
+                led.setBrightness(minBrightness);
+            }
+            Thread.sleep(200);
+        }
+    }
+}

examples/platform/up2-leds.cpp

@@ -0,0 +1,95 @@
+/*
+ * Author: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
+ * Copyright (c) 2018 Intel Corporation
+ *
+ * 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.
+ */
+
+#include <iostream>
+#include <string>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "mraa/common.hpp"
+#include "mraa/led.hpp"
+
+// Define min and max brightness
+#define LED_ON  255
+#define LED_OFF 0
+
+// This boolean controls the main loop
+volatile bool should_run = true;
+
+// Interrupt signal handler function
+void
+sig_handler(int signum)
+{
+    if (signum == SIGINT) {
+        std::cout << "Exiting..." << std::endl;
+        should_run = false;
+    }
+}
+
+// Main function
+int
+main()
+{
+    // Perform a basic platform and version check
+    if (mraa::getPlatformType() != mraa::INTEL_UP2) {
+        std::cout << "This example is meant for the UP Squared board." << std::endl;
+        std::cout << "Running it on different platforms will likely require code changes!" << std::endl;
+    }
+
+    if (mraa::getVersion().compare("v1.9.0") < 0) {
+        std::cout << "You need MRAA version 1.9.0 or newer to run this sample!" << std::endl;
+        return 1;
+    }
+
+    // Register handler for keyboard interrupts
+    signal(SIGINT, sig_handler);
+
+    // Define our LEDs
+	std::string led_names[] = {"red", "green", "yellow", "blue"};
+    int led_no = sizeof(led_names)/sizeof(led_names[0]);
+    mraa::Led **leds = new mraa::Led*[led_no];
+
+    // Initialize them
+    for (int i = 0; i < led_no; i++) {
+        leds[i] = new mraa::Led(led_names[i].c_str());
+    }
+
+    // Blink them in order and pause in-between
+    while (should_run) {
+        for (int i = 0; i < led_no; i++) {
+            leds[i]->setBrightness(LED_ON);
+            usleep(200000);
+            leds[i]->setBrightness(LED_OFF);
+        }
+        usleep(200000);
+    }
+
+    // Cleanup and exit
+    for (int i = 0; i < led_no; i++) {
+        delete leds[i];
+    }
+    delete [] leds;
+    return 0;
+}