I have a QuickCam Orbit that works great with my desktop: x86, Linux 2.6, PWC driver 10.
When I try to use the same camera with my embedded, single board computer with ARM processor (TS-7250) and Linux 2.4.26, and pwc driver 10.0.4, almost all operations fail. (Only the Linux 2.4.26 is supported for the TS-7250.)
I would sincerely appreciate any help, as I am mostly lost, and this is a fundamental part of a bigger extracurricular college project due later this month. I was expecting to do application development, but am running into kernel issues which are beyond my expertise.
$ insmod /mnt/nfs/linux24_ts8/drivers/usb/pwc.o Using /mnt/nfs/linux24_ts8/drivers/usb/pwc.o pwc Philips webcam module version 9.0.2-unofficial loaded. pwc Supports Philips PCA645/646, PCVC675/680/690, PCVC720/730/740/750 & PCVC830/840. pwc Also supports the Askey VC010, various Logitech Quickcams, Samsung MPC-C10 and MPC-C30, pwc the Creative WebCam 5 & Pro Ex, SOTEC Afina Eye and Visionite VCS-UC300 and VCS-UM100. usb.c: registered new driver Philips webcam pwc Logitech QuickCam Orbit/Sphere USB webcam detected. pwc Registered as /dev/video0.
The actual device is /dev/v4l/video0, but I don't think that should matter.
Here is the first sign of trouble when querying tilt and pan. There is an error and values out of range.
$ /mnt/nfs/compiled/setpwc -d /dev/v4l/video0 -u setpwc v0.9, (C) 2003-2005 by firstname.lastname@example.org Error while doing ioctl VIDIOCPWCMPTSTATUS: Broken pipe Status: 6 Time pan: -1065797440 Time tilt: 76720/pre>
More trouble when dumping settings. Notice that at least the device name (Logitech QuickCam Orbit) is OK. Some values are clearly out of range, and it's a good guess the rest of them are wrong too.
$ /mnt/nfs/compiled/setpwc -d /dev/v4l/video0 -p setpwc v0.9, (C) 2003-2005 by email@example.com Current device: Logitech QuickCam Orbit VIDIOCPWCPROBE returns: Logitech QuickCam Orbit - 740 Resolution (x, y): 160, 120 Offset: 0, 0 Framerate: 10 Brightness: 7680 Hue: 65535 Colour: 32768 Contrast: 32768 Whiteness: 49152 Palette: YUV 4:2:0 Planar Compression preference: 2 Automatic gain control: -4956 Whitebalance mode: auto Blinking of LED is not supported by the combination of your webcam and the driver. Sharpness: -1 Backlight compensation mode: off Anti-flicker mode: on Noise reduction mode: 1 Pan min. : -7000, max.: 7000 Tilt min.: -3000, max.: 2500 Pan (degrees * 100): 0 Tilt (degrees * 100): 0
OK, so I thought I could maybe capture an image anyway, but I can't. For example:
$ /mnt/nfs/compiled/videograb -d /dev/v4l/video0 -c 1 ioctl (VIDIOCSPICT): Invalid argument wrong palette/depth: Invalid argument