[Xenomai-help] Re: RTDM and udelay

[Jan Kiszka <jan.kiszka@domain.hid>]

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Rodrigo Rosenfeld Rosas wrote:
> Is there any alternative to udelay on RTDM?
> 
> Or should I do something like:
> 
> void rt_udelay(unsigned int usec) {
>   uint64_t timeout = rtdm_clock_read () + usec;
>   while (rtdm_clock_read () < timeout);
> }

You mean something like this: =:)

http://www.rts.uni-hannover.de/xenomai/lxr/source/ksrc/skins/rtdm/drvlib.c?v=SVN-trunk#L366

> 
> Or maybe my design is wrong.
> 
> I have a function, say WriteI2C(...). Should I create it as a task and call 
> rtdm_task_sleep?

Depending on how long you would like to sleep and if you are not inside
an IRQ handler, a re-scheduling call like rtdm_task_sleep() can be
better. If it's just about a few microseconds, busy sleeping should be
preferred.

Jan


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