diff --git a/f8/timer.cc b/f8/timer.cc
index 607ed96..7b7f31b 100644
--- a/f8/timer.cc
+++ b/f8/timer.cc
@@ -18,16 +18,26 @@ namespace f8
     void Timer::Init()
     {
         initialized_ = true;
+        xtimer_.Init
+            (
+             [] (void* context)
+             {
+                 return a8::XGetTickCount();
+             },
+             this,
+             10,
+             1000
+             );
     }
 
     void Timer::UnInit()
     {
-
+        initialized_ = false;
     }
 
     bool Timer::Initialized()
     {
-
+        return initialized_;
     }
 
     void Timer::Update()