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Date: Fri, 30 Mar 2012 16:48:49 +0200
From: Wolfgang Grandegger <wg@domain.hid>
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Subject: Re: [Xenomai-help] Cross-link.c ---RTSER_RTIOC_WAIT_EVENT
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To: Minh GIANG <giang.hminh@domain.hid>
Cc: xenomai-help <xenomai@xenomai.org>

On 03/30/2012 04:34 PM, Minh GIANG wrote:
> hi,
> 
> with option RTSER_RTIOC_WAIT_EVENT in rt_dev_ioctl(), this function returns
> un number -110 (Connection timed out)
> with option RTSER_RTIOC_GET_STATUS in rt_dev_ioctl(), this function returns
> un number 0 (not message)

You should call this function *after* the timeout happened. What does
the "struct rtser_status"  contain? Especially the "line_status" is of
interest.

> 
> Anyway, currently it works without  rt_dev_ioctl(), i can see rt_dev_read()
> wait data event (with debug mode) while giving the period of write
> task,  for exemple  = two seconds.
> 
> so can i remove the funtion rt_dev_ioctl?

The rt_dev_ioctl should work. You can remove it, but the problem will
remain. To debug the problem you could also add some printk's here:

http://www.rts.uni-hannover.de/xenomai/lxr/source/ksrc/drivers/serial/16550A.c#223

Especially the value of "iir" might be interesting.

Wolfgang.