[libdc1394-devel] Re: dma_multi_capture hang

[<Chr...@sk...>]

Hello everybody,
> I am guessing that your camera is not transmitting frames for some=20
> reason.  I know that some cameras are sensitive to the exact order in=20
> which their registers are initialized.  You may have to ask=20
> specifically if anyone else on this list is successfully running a=20
> Sony DFW-V300 and, if so, in what order they are setting things up.
>=20
> I would have thought that dc1394=5Fmultiview works for most cameras.  If =

> you are desperate you could also try my Cammonitor example (in the=20
> Camwire URL below).  Cammonitor sets up registers in the order the=20
> Basler A301fc camera requires.
=20
First of all, thanks for Camwire and Cammonitor! With my Basler A602f the=20
only libdc1394 example that works is dc1394=5Fmultiview, but what I need is=
=20
something like grab=5Fpartial=5Fimage. With Cammonitor, it works fine, exce=
pt=20
for one problem:

Both Camwire and my own (DirectFB-based) app freeze after a while when=20
continously acquiring and displaying and AOI of 656 by 10 by 8.
Desktop switching or running KDE System guard seems to increase the=20
problem, despite the fact that my CPU load is between 20 and 30 percent=20
when I use Cammonitor. Cammonitor stops displaying and reacting to=20
commands, when Ctrl-C is pressed, I get=20
(dc1394=5Fcapture.c) VIDEO1394=5FIOC=5FLISTEN=5FWAIT/POLL=5FBUFFER ioctl fa=
iled!
camwire=5F1394.c (1422): dc1394=5Fdma=5FSingle=5Fcapture() failed in=20
camwire=5Fpoint=5Fnext=5Fframe().

Here are my tech. specs:

SuSE 9.1 (2.6.5-7.75-smp) on a DSM 3.06 GHz P4 w/ Hyperthreading, 1GB=20
memory, Intel i845 integrated graphics

The contents of my A602f.config:

Camwire IEEE 1394 IIDC DCAM hardware configuration:
speed:               2
format:              391
mode:                288
max=5Fpackets:         4095
min=5Fpixels:          512
bus=5Fperiod:          0.000125
trig=5Fsetup=5Ftime:     0
exposure=5Fquantum:    2e-05
exposure=5Foffset:     0
line=5Ftransfer=5Ftime:  0
transmit=5Fsetup=5Ftime: 0
do=5Fextra=5Fbuffering:  0
drop=5Fframes:         0
dma=5Fdevice=5Fname:     /dev/video1394
=20
and A602f.settings:

Camwire settings:
num=5Fframe=5Fbuffers: 10
left:              0
top:               245
width:             656
height:            10
depth:             8
frame=5Frate:        3000
shutter:           0.0005
external=5Ftrigger:  0
trigger=5Fpolarity:  1
single=5Fshot:       0
running:           1

frame rate is actually 2666.67 fps

Does anybody have a clue what I might be doing wrong?






Beste Gr=FC=DFe / Kind regards / Meilleures Salutations
---------------------------------------------------------------------------=
------
Ing. Dipl. Ing. (FH) Christian Daschill
Business Development & Projects
SKF QTC Austria

Christian dot Daschill at skf dot com
www.qtc.skf.com
+43 72 52 797 573     Voice
+43 72 52 797 88573 Fax