Updated example configurations
diff --git a/contiki/conf/clock-conf.h.example b/contiki/conf/clock-conf.h.example
new file mode 100644
index 0000000..a3797e3
--- /dev/null
+++ b/contiki/conf/clock-conf.h.example
@@ -0,0 +1,8 @@
+#ifndef __CLOCK_CONF_H__
+#define __CLOCK_CONF_H___
+
+typedef unsigned short clock_time_t;
+
+#define CLOCK_CONF_SECOND CLK_TCK
+
+#endif /* __CLOCK_CONF_H__ */