up2: adding platform examples for built-in user leds

Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
2018-03-22 15:29:01 -07:00
parent d9c54e1d31
commit bbcdb1e087
3 changed files with 185 additions and 0 deletions
--- a/examples/platform/up2-leds.cpp
+++ b/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;
+}