Syntek readme

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Syntek USB 2.0 Video Camera

===============

Note : The syntek USB 2.0 video camera driver for DC-1125 ans STK-1135 is currently being developed on Linux. This driver can do damages. Use this driver only if you know what you are doing.


Table of contents :

1. Requirements

2. Compilation

2.1 Documentation

2.2 Kernel module

3. Installation

4. Usage

4.1 Option "fps" module

4.2 Options "hflip" and "vflip" module

4.3 Options "contrast", "colour", "whiteness" and "brightness"

4.4 Use the "sysfs"

5. Status of project

6. Test experimental

7. Debug

7.1. 'lsusb' output

7.2. USB logs from Windows

7.3. USB logs from Linux

7.4. Enable module traces

8. Licence


1. Requirements

Kernel 2.6.18 or higher
Doxygen to compile the documentation

2. Compilation

2.1 Documentation

  To build documentation :
  $ make -f Makefile.standalone doc
  $ make -f Makefile.standalone cleandoc

2.2 Kernel module

  To build the kernel module :
  $ make -f Makefile.standalone
    or
  $ make -f Makefile.standalone driver
  $ make -f Makefile.standalone clean

3. Installation

TODO...


4. Usage

4.1 Option "fps" module

  The syntek module waits the option "fps" (10, 15, 20, 25, 30) :
  $ modprobe stk11xx fps=30
  By default, the fps is set to '25'.

4.2 Options "hflip" and "vflip" module

  The syntek module waits the options "hflip" and "vflip" (values are 0 or 1):
  $ modprobe stk11xx hflip=0 vflip=1
  By default, the hflip and vflip are set to '1'.

4.3 Options "contrast", "colour", "brightness" and "whiteness"

  The syntek module waits the options "contrast", "colour", "brightness" and "whiteness" :
  $ modprobe stk11xx contrast=0x7F00 colour=0x7F00
  By default, the value of these options is set to '0x7F00'.

4.4 Use the "sysfs"

  In the directory : /sys/class/video4linux/videoX (by sample video0), you
  can read and write some parameters :
  $ cat hflip
  $ echo 0 > hflip

To display informations about driver :

  $ cat informations

5. Status

The kernel module is currently being developped.
The driver supports several webcam models :
- 0x174F:0xA311 : Quiet good supported (developper's model)
- 0x174F:0xA821 : Supported (only the video stream)
- 0x174F:0x6A31 : Supported (only the video stream)
- 0x05E1:0x0501 : Like '0x174F:0xA311' (it's the same model)

To increase the support, I need some help... Or somebody gives me the webcam !


6. Test experimental

To build and load the driver, follow the steps :

$ make -f Makefile.standalone clean
$ make -f Makefile.standalone
$ modprobe videodev
$ insmod stk11xx.ko

To test the driver with the V4L v1 API (map methode) :

$ camorama -D --width=640 --height=480 

To test the driver with the V4L v1 API (read methode) :

$ camorama -D -R --width=640 --height=480 

To test the driver with the V4L v2 :

$ xawtv

To use mplayer / mencoder :

$ mplayer tv:// -tv driver=v4l:width=640:height=480
$ mplayer tv:// -tv driver=v4l2:width=320:height=240:fps=25:outfmt=rgb24:device=/dev/video0
$ mplayer tv:// -tv driver=v4l2:width=320:height=240:fps=25:outfmt=yuy2:device=/dev/video0
$ mplayer tv:// -tv driver=v4l2:width=320:height=240:fps=25:outfmt=uyvy:device=/dev/video0
$ mencoder tv:// -tv driver=v4l:width=640:height=480:outfmt=rgb24:device=/dev/video0 -nosound -ovc lavc -o out.avi
$ mencoder tv:// -tv driver=v4l2:width=320:height=240:fps=25:outfmt=rgb24:device=/dev/video0 -nosound -ovc lavc -o out.avi

7. Debug

7.1. 'lsusb' output

  [root@Dahlia driver]$ lsusb
  Bus 002 Device 002: ID 046d:c047 Logitech, Inc.
  Bus 002 Device 001: ID 0000:0000
  Bus 005 Device 001: ID 0000:0000
  Bus 004 Device 002: ID 0b05:1712 ASUSTek Computer, Inc.
  Bus 004 Device 001: ID 0000:0000
  Bus 003 Device 001: ID 0000:0000
  Bus 001 Device 004: ID 174f:a311			<== Our Webcam
  Bus 001 Device 001: ID 0000:0000

  [root@Dahlia driver]$ lsusb -d 174f:a311 -vvv > lsusb.txt

7.2. USB logs from Windows

  There is 3 USB logs useful :
  - Log 1 : when you plug your webcam
  - Log 2 : when you run VideoView.exe (with the default settings)
  - Log 3 : when you run VideoView.exe, then change the resolution to 1280x1024

7.3. USB logs from Linux

  Use the kernel module usbmon (enable option debugfs in the kernel)

7.4. Enable module traces

  You can enable : CONFIG_STK11XX_DEBUG and CONFIG_STK11XX_DEBUG_STREAM

8. Licence

The kernel module is distributed under the licence GPL.


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