using udelay()?

In kernelspace you can use the udelay (microseconds delay) and mdelay (milliseconds delay) functions.

In userspace ("normal" uClinux C application) you can use the common usleep (microseconds delay) and sleep(seconds delay) function.

I haven't personally used the sleep bu I have used usleep and udelay and they worked like a charm!

So it depends on what you're writing... When in doubt i'd say go for usleep.

You have to include unistd.h in order to use usleep.