Re: getting 1394 port information

On Sun, 2004-02-01 at 13:08, Steve Kinneberg wrote:
> On Sun, 2004-02-01 at 01:46, pat leang wrote:
> > How would I find out if it is a multi-port card? I'm don't quite undestand
> > the concept of a multi-port card. Here is a link to the type of card I
> > have.
>
> I think Dan is referring to cards with more than one link layer and
> physical layer chip sets and the connectors are split between them.

Correct, and you can cat /proc/bus/ieee1394/devices and see if more than
Linux OHCI node shows.

> > http://www.motionio.com/
> > As you can see, there are 3 physical ieee1394 connectors. If I connect a

This does not look like a multiport card.

> > camera to one of the physical connectors, is it possible to know from which
> > connector the camera is connected to? I use the libdc1394 library routines,
> > but it doesn't seem possible.
>
> It really shouldn't matter which connector your camera is connected to.
> All three connectors are interchangeable. If you have more than one
> camera and want to keep track of which one is which, it is much better
> to use the GUID number rather than which connector the device is
> connected to.

Correct, and in libdc1394 GUID is memnber euid_64 of dc1394_camerinfo
along with textual descriptions vendor and model. So, you can enumerate
the cameras in a menu and then let the user pick.

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