On Wed, Feb 03, 1999 at 02:15:39AM +, Stephen Palmer wrote:
While looking at the output from dmesg, I noticed the following
which I don't remember having seen before. (Of course I might
not have had the camera hooked up to this system while running
FreeBSD before ;-)
Sure, this is really new.
Probing for PnP devices on ppbus0:
ppbus0: VLSI Vision Ltd PPC2 Camera MEDIA CPIA_1-20
What it means: the parallel port bus system - ppbus - probes the
parallel port in order to detect eventually an IEEE1284 (parallel port
standard released in 1994) compliant device. So your camera is IEEE1284
compliant because ppbus could enter the NIBBLE-get_device_id mode and
retrieve PnP info from it.
The line before tells you something like IEEE1284 device found... with
the available IEEE1284 modes supported by your device.
This is actualy a Zoom/Video Cam PPC which I use under Win98
from time to time. Any chance of getting working images from
this device under FreeBSD-current? How would I go about this?
The link protocol is supported by FreeBSD, this is what the IEEE1284 stuff
is for. But you'll also need info about higher protocols of the
device to drive it correctly.
(1) The device is really simple and a 'cat' from the parallel port in
any of the supported modes is enough. That would suppose the camera dumps
pictures to the port as they are captured. Of course,
you should guess the format.
This is the case with printers supporting IEEE1284: cat /dev/lpt0
gives printer info (READY, OUT OF PAPER...). If NIBBLE mode is supported by
your device, which is not certain if I remember well your logs, you can try
cat /dev/lpt0. Otherwise we'll have to hack ppi(4) to give it a try..
(2) The device is more complicated and an analyser under windows may give
you the magic sequence to enter plain reverse mode to retrieve pictures as
they are captured.
This system is not currently very current (Jan 14, 1999 / no pun
intended) but I'm cvsup'ing as I type this...
Stephen L. Palmer
slpal...@netscape.net
Nicholas.
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