Re: [Cpia2-development] cpia2 Unexpected error: -71 using qx5view

[Steven L. M. <ste...@st...>]

Anthony Tekatch wrote:
> I'm trying to get the Digital Blue QX5 Microscope working with qx5view.
> 
> The lights cannot be controlled. When I press a button to control the
> lights I get this message in /var/log/messages:
>   cpia2: Control message failed, err val = -71 
> 
> Also, the video device /dev/video0 is removed and then qx5view no longer
> shows active video, then /dev/video1 gets created.
> 
> I am using the cpia2 module that comes with the Debian compiled kernel:
>  2.6.18-4-686 #1 SMP Mon Mar 26 17:17:36 UTC 2007 i686 GNU/Linux
> 
> I am using the qx5view from the CVS with most files dated May 19 2005 and
> frontend.c at Oct 5 2005.
> 
> Is there any testing I can do to narrow down the problem?
> 
> Cheers,
> Anthony

Unfortunately, I don't have a microscope, and don't run Debian, so I'm 
not sure what the problem could be. A -71 is a protocol error, so there 
may be differences in what that version of the driver expects and what 
qx5view is sending. I can only think of two approaches. One is to get 
the source from the Debian module and take a look at the code to figure 
out what is going on (search for the message text and see what it it is 
trying to do). The other is to grab the driver source from sourceforge 
and try to compile and use it. As far as I know, the versions on 
sourceforge worked together (qx5view was written by a different 
contributor, and I've never had a microscope to test it).

Hope this helps,

Steve

-- 
Steve Miller
Staff Software Engineer
STMicroelectronics
North American Mobile Platforms Applications Lab
phone (602) 485-2014