RE: [rtl] Robots.

["Basham, Richard R" <Richard.Basham@PSS.Boeing.com>]

I have converted DOS real time programs to RT-Linux and found it to be a fairly easy task.  I did not have to change any of the computer hardware to make it work.  However, I did have to deal with the permissions to get direct access to  the I/O ports.  There are two ways to do this.  One way is to run as root and the other is to set the uid.  There has been some discussion of this before and it should be in the archives.  I would point out that if you have PCI cards there is considerable more interface software involved than with ISA cards.  This has been discussed here as well.

I hope this helps you in your quest.

Rich

> ----------
> From: 	Stephane Pierre Bordas[SMTP:spb276@merle.acns.nwu.edu]
> Sent: 	Tuesday, March 02, 1999 8:47 AM
> To: 	realtime linux
> Cc: 	Stephane BORDAS
> Subject: 	[rtl] Robots.
> 
> 
> Dear all of you !! :)
> 
>                               
> Our problem is the following, 
> Our command (robot command) is running under DOS. Using this command, we 
> are
> able to compute the trajectories for our robot as precise as one point
> every 10 milliseconds with linear interpolation each millisecond.
> We want to evolute towards a more efficient control. We thought of
> Windows,
> but it seems to be difficult to get a "true industrial real time" and it
> was not recommended to us. For budjet reasons, we would like to keep the
> system running on PCs and are looking for ideas to improve the
> quality of trajectories. Linux could be a possibility. 
> Do you think it is possible to use Windows for such applications ? 
> Do you think RTL could be a good alternative ? 
> How much remodeling of the computer system architecture do you think would
> be needed for a switch from DOS to LINUX ? 
> Thanks again for your answers, I really appreciate it, I am going to look
> into the places you all told me about, 
> 
> I saw some other persons seemed to be interested in the same kind of
> "problems", don't hesitate to email back to discuss them, we might have
> some common issues we would like to address.
> 
> Thanks again
> 
> Regards
> 
> Stephane.         
>                                       o
>                                 o     |     o
>                                  \         /
>                               o-    \\|//   -o              
>                                     (o o)                
> ________________________________oOOo-(_)-oOOo__________________________________
> Stephane P. Bordas                              sbordas@nwu.edu	                                
> Ph.D Student Computational Fracture Mechanics
> Northwestern University
> http://members.xoom.com/slbordas/
> http://www.mygale.org/07/spb276               
> http://www.multimania.com/stephanebordas
> http://www.multimania.com/kittens
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