I don't know what problem yuor are trying to solve, so I don't know how
important the delay time is.
However, there are no normal delay available that will allow you to
generate a 2.5ms delay. In most operating systems, the delay functions
only take a parameter sepcifying the shortest allowed delay. They never
guarantee that the appliaction will be waked up immediately at the end of
the delay. If that is a necessity, you either have to use a RTOS, or you
have to write a hardware driver that will interface directly with the
hardware.
Even if you use one of the existing sleep functions, and specify a 3 ms
delay, you might get a delay of one or more time slizes - normally 16 or
32 ms.
It is possible to measure time very exactly using the performane timers
available. These can - together with a busy loop - be used to implement
short sleeps of reasonably high precision. However, it can not be
guaranteed that the application isn't preempted, even if it runs at a very
high priority.
There are also a couple of multimedia functions available that works with
reasonably high-resolution timing.
/Per W
On Fri, 22 Sep 2006, [UTF-8] Eren Ezg=C3=BC wrote:
> i need to make time delays of 0.5 ms precision. for example i need to del=
ay
> 2.5 ms. i can delay 1 ms precision with sleep and clock functions but tha=
ts
> not enough for me. if there's a way of dividing a ms to two parts that wo=
uld
> be fine.
>
> how can i do this?
>
> --
> www.cprogramlama.net
>
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