From c44c022ac426672eb02a0656632afca635a1ce96 Mon Sep 17 00:00:00 2001
From: Kaspar Schleiser <kaspar@schleiser.de>
Date: Fri, 14 Aug 2015 16:02:32 +0200
Subject: [PATCH] examples: timers: add timer_periodic_wakeup example

---
 examples/timer_periodic_wakeup/Makefile |  9 ++++++
 examples/timer_periodic_wakeup/main.c   | 37 +++++++++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 examples/timer_periodic_wakeup/Makefile
 create mode 100644 examples/timer_periodic_wakeup/main.c

diff --git a/examples/timer_periodic_wakeup/Makefile b/examples/timer_periodic_wakeup/Makefile
new file mode 100644
index 000000000..e8744e127
--- /dev/null
+++ b/examples/timer_periodic_wakeup/Makefile
@@ -0,0 +1,9 @@
+APPLICATION = timer_periodic_wakeup
+RIOTBASE ?= $(CURDIR)/../..
+BOARD ?= native
+USEMODULE += xtimer
+QUIET ?= 1
+
+FEATURES_REQUIRED += periph_timer
+
+include $(RIOTBASE)/Makefile.include
diff --git a/examples/timer_periodic_wakeup/main.c b/examples/timer_periodic_wakeup/main.c
new file mode 100644
index 000000000..ce080f4e9
--- /dev/null
+++ b/examples/timer_periodic_wakeup/main.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2015 Kaspar Schleiser <kaspar@schleiser.de>
+ *
+ * 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     xtimer_examples
+ * @{
+ *
+ * @file
+ * @brief       example application for setting a periodic wakeup
+ *
+ * @author      Kaspar Schleiser <kaspar@schleiser.de>
+ *
+ * @}
+ */
+
+#include <stdio.h>
+#include "xtimer.h"
+
+/* set interval to 1 second */
+#define INTERVAL (1000000U)
+
+int main(void)
+{
+    uint32_t last_wakeup = xtimer_now();
+
+    while(1) {
+        xtimer_usleep_until(&last_wakeup, INTERVAL);
+        printf("slept until %"PRIu32"\n", xtimer_now());
+    }
+
+    return 0;
+}