From 1e950af492693881a74c6bd258822fb39e03f925 Mon Sep 17 00:00:00 2001
From: adamdunkels <adamdunkels>
Date: Tue, 3 Apr 2007 19:02:27 +0000
Subject: [PATCH] Test program that blinks LEDs using the rtimer real-time
 timers

---
 examples/sky/rt-leds.c | 71 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 examples/sky/rt-leds.c

diff --git a/examples/sky/rt-leds.c b/examples/sky/rt-leds.c
new file mode 100644
index 000000000..4c271a8e7
--- /dev/null
+++ b/examples/sky/rt-leds.c
@@ -0,0 +1,71 @@
+
+#include "contiki.h"
+#include "sys/rtimer.h"
+
+#include "dev/leds.h"
+
+/*---------------------------------------------------------------------------*/
+PROCESS(test_rtimer_process, "Test RT");
+AUTOSTART_PROCESSES(&test_rtimer_process);
+
+struct fade {
+  struct rtimer rt;
+  struct pt pt;
+  int led;
+  rtimer_clock_t ontime, offtime;
+  int addend;
+};
+/*---------------------------------------------------------------------------*/
+static void
+fade(struct rtimer *t, void *ptr)
+{
+  struct fade *f = ptr;
+
+  PT_BEGIN(&f->pt);
+
+  while(1) {
+    leds_on(f->led);
+    rtimer_set(t, RTIMER_TIME(t) + f->ontime, 1, fade, ptr);
+    PT_YIELD(&f->pt);
+    
+    leds_off(f->led);
+    rtimer_set(t, RTIMER_TIME(t) + f->offtime, 1, fade, ptr);
+
+    f->ontime += f->addend;
+    f->offtime -= f->addend;
+    if(f->offtime <= 4 || f->offtime >= 100) {
+      f->addend = -f->addend;
+    }
+    PT_YIELD(&f->pt);
+  }
+
+  PT_END(&f->pt);
+}
+/*---------------------------------------------------------------------------*/
+static void
+init_fade(struct fade *f, int led)
+{
+  f->led = led;
+  f->addend = 4;
+  f->ontime = 4;
+  f->offtime = 100;
+  PT_INIT(&f->pt);
+  rtimer_set(&f->rt, RTIMER_NOW() + led, 1, fade, f);
+}
+/*---------------------------------------------------------------------------*/
+PROCESS_THREAD(test_rtimer_process, ev, data)
+{
+  static struct fade red;
+  PROCESS_BEGIN();
+  
+  rtimer_init();
+
+  init_fade(&red, LEDS_RED);
+  
+  while(1) {
+    PROCESS_WAIT_EVENT();
+  }
+  
+  PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/