--- a/src/timer.c	Sun Apr 06 18:25:55 2014 +0300
+++ b/src/timer.c	Fri Apr 11 14:42:10 2014 +0300
@@ -67,7 +67,7 @@
  *
  * Returns 0 on interrupt, 1 on timeout.
  */
-char timer_sleep (int cycles)
+char timer_sleep (unsigned cycles)
 {
     if (cycles) {
         // set timer