title: Uboot timer with interrupts
body: <p>I would like to show Uboot progress with blinking LED's. For this purpose I need delay which will not use while loop (non-blocking), but interrupts instead.</p>
  
  <p>Is there any implementation of timers inside Uboot ? 
  I have looked a little bit, but I didn't find non-blocking delays. 
  Do I need to implement if from scratch ?</p>
  
  <p>I use at91SAM9 with Uboot 2010.06.</p>
  
  <p>Thank you</p>