The USB Camera

The Sweex Webcam 100K can capture images at 352 x 288 pixels, 25fps.
The product is also available through several OEM channels, such as Sanwa CMS-V12 in Japan.

Prerequisite

  1. Omap linux kernel 2.6.12 or later

    2. The sn9c10x driver is merged in the 2.6.12.
  2. Confirm your camera is compatible with Webcam 100K

    3. Connect the camera to the OSK5912, and check vendor id and product id 
    # cat /sys/deices/platform/ohci/usb1/1-1/idVendor
0c45
# cat /sys/device/platform/ohci/usb1/1-1/idProduct
6005
  3. USB Bus power voltage

    4. The CMV-12 USB camera draws the current more than the OSK5912 nominal capability. Check your board if this is the case. Probe pin 1 of the USB connector. If it's around 5[v], it should be OK. Otherwise, an external powered USB hub might be needed. 
    Hint: Turning off the lcd backlight and removing compact flash card might help.

Compile the kernel with following options enabled.

Device Drivers --->
Multimedia deices --->
<*> Video for Linux				( CONFIG_VIDEO_DEV )

Device Drivers --->
USB support --->
<*> Support for Host-side USB			( CONFIG_USB )
<*>   OHCI HCD support				( CONFIG_USB_OHCI_HCD )

Device Drivers --->
USB support --->
USB Camera support-->
<*>   USB SN9C10x PC Camera Controler support 	( CONFIG_USB_SN9C102 )

Prepare capturing program

On Linix host, execute this script to generate the osk5912_webcam.tar.gz
Extract this file at the OSK5912's root file system. 
# cd /
# tar xvfz osk5912_webcam.tar.gz
bin/webcam
lib/libjpeg.la
lib/libjpeg.so
lib/libjpeg.so.62
lib/libjpeg.so.62.0.0

Create device nodes 

# mknod /dev/video0 c 81 0
# ln -s /dev/video0 /dev/video

Test

In the normal environment, the camera gives the values around 0x20. 
# hexdump -v -n 100 /dev/video0
0000000 2528 2627 2b2a 252b 2926 292e 262b 2925
0000010 2725 2729 2926 2627 2829 2727 2729 2b24
...
Try variety environment (eg. room light on/off, put red paper in front of the camera...) to see if the values change.

Capture the image 

# /bin/webcam image.jpg

Further reference

A graceful acknowledgement

return