Re: [Xenomai-help] RTDM & serial port

[Jan Kiszka <kiszka@domain.hid>]

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Hannes Mayer wrote:
> Hi Jan et al.!
> 
> I've noticed your thread on the RTAI list "Driver Model for RTAI" in June.
> Now as I try to port some RTAI serial port stuff to Xenomai in order to
> put up some howto page on my website, I'm clueless.

Actually, there is already some howto, but I guess also enough room for
improvements: http://www.rts.uni-hannover.de/mitarbeiter/kiszka/rtaddon/

> 
> None of the RTAI functions rt_spopen, rt_spread_timed, rt_spwrite are
> available - I see that there is some rt_dev_open, rt_dev_write available,
> but only rt_dev_read - what about some timed-read ?

Yep, that's correct, it's yet another new API. Anyway, if you feel the
need for a legacy wrapper, you are welcome to add some library on top of
the RTDM profile.

BTW, timed read can be realised by setting a reception timeout for the
opened device instance, see example or profile documentation.

> 
> I see that rt_spopen opens /dev/rtser[X] but /dev/rtser[X] is not on my
> system, nor can I find any creation-script in the xenomai source.

Nope, RTDM devices are not being mapped into the Linux file system. They
use a separate namespace where you can find serial devices as plain
"rtser[X]".

> 
> Sorry if I'm overlooking some stuff... 5:40am here.
> 

Any frequent problems falling asleep? ;)

Jan

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