examples: added Skald iBeacon example

examples/skald_ibeacon/Makefile

@@ -0,0 +1,21 @@
+# name of your application
+APPLICATION = skald_ibeacon
+
+# If no BOARD is found in the environment, use this default:
+BOARD ?= nrf52dk
+
+# This has to be the absolute path to the RIOT base directory:
+RIOTBASE ?= $(CURDIR)/../..
+
+# include Skald
+USEMODULE += skald_ibeacon
+
+# Comment this out to disable code in RIOT that does safety checking
+# which is not needed in a production environment but helps in the
+# development process:
+# CFLAGS += -DDEVELHELP
+
+# Change this to 0 show compiler invocation lines by default:
+QUIET ?= 1
+
+include $(RIOTBASE)/Makefile.include

examples/skald_ibeacon/README.md

@@ -0,0 +1,6 @@
+# Skald iBeacon Example
+
+This example demonstrates the usage of `Skald` for creating an Apple `iBeacon`.
+
+Simply compile and flash, and verify your newly created beacon with any type of
+BLE scanner.

examples/skald_ibeacon/main.c

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2017-2018 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     examples
+ * @{
+ *
+ * @file
+ * @brief       Setting up an iBeacon using Skald
+ *
+ * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
+ *
+ * @}
+ */
+
+#include "log.h"
+
+#include "net/skald/ibeacon.h"
+
+/* configure the iBeacon */
+#define UUID            { 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, \
+                          0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, }
+#define MAJOR           (0x0023)
+#define MINOR           (0x0017)
+#define TXPOWER         (0U)
+
+/* allocate a single advertising context */
+static skald_ctx_t _ctx;
+
+int main(void)
+{
+    LOG_INFO("Skald and the tail of the iBeacon\n");
+
+    /* this will configure the iBeacon and start advertising it */
+    skald_uuid_t uuid = { UUID };
+    skald_ibeacon_advertise(&_ctx, &uuid, MAJOR, MINOR, TXPOWER);
+
+    return 0;
+}