Hello RTers
This is a bit off the RTL and RTAI topic but I have a quetion similar to
Patricks regarding RT display. I am willing to accept the course
grained timing given by the reciprocol of the refresh rate but I would
like to be able to draw the image to screen with hard RT scheduling. There
exists a register in most cards that "resets" the sequencer.
I am not sure what reset means and can find no documentation to tell so. I
am wondering if anyone knows whether this resets the sequencer so that I can
start at a well defined spot in the sequencer cycle and therefore achieve
hard RT scheduling. Of course there may be latencies for the reset which
would have to be taken into account.
Any help, references (besides Ferraro's book), mailing list,
video card manufacturer contact, etc would be greatly appreciated.
Does anyone know how the November RT Linux workshop is shaping up?
Thanks once again,
Daniel
>From: kumsta <[EMAIL PROTECTED]>
>To: berger patrick <[EMAIL PROTECTED]>
>CC: [EMAIL PROTECTED]
>Subject: Re: [rtl] rt display in usec
>Date: Wed, 09 Aug 2000 17:31:00 +0200
>
>Hi,
>
>- make a dga access to a X(gtk-canvas) in Xwindow apps
>- give throught rt-fifo physical address to your rt-process
>- remap the dga buffer in kernel space
>- and use a real-time process to do image processing (including
>formatting your picture in dga buffer).
>
>Normally your dga-buffer is position independant ... but take care if
>you iconify your Xapps !!!
>
>Chris.
>
>berger patrick wrote:
> > I'd like to display a picture for 40 usec exactly (this value can be
>changed)
> > with gtk or qt (i may use X for use matrox dual head)
> > is it possible with rtlinux?
>
>--
>don't forget to remove NOSPAM_ for reply
>Kumsta Christophe <[EMAIL PROTECTED]>
>Real-Time image processing developper
>RT-Linux/RTAI ( Use the Source Luck !)
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