Difference between revisions of "GspcaWebcam"

Revision as of 19:54, 10 October 2009

Page under construction... Informations on this page are not guaranteed !!

On this page, you will find some information to add USB webcam support to your Armadeus board.

Introduction

Some USB webcam works on Linux with the GSPCA driver (like the low-cost webcam of LDLC). The source of this driver is now included in the current Linux kernel (starting 2.6.27). Because I don't hold any LCD screen for the moment, the next step is to stream webcam image over the Internet.

Find your webcam model

In order to find your webcam model, you can connect your USB webcam to your computer and use dmesg.

  [  ] $ dmesg
  ...
  usb 1-1: New USB device found, idVendor=04fc, idProduct=0561

With idVendor and idProduct you might be able to find the module to install. For GSCPA based wecam, a list is given in the Linux kernel documentation and can be found here :

  <...>/linux-2.6.xxx/Documentation/video4linux/gspca.txt

In my case, the support of the spca561 module need to be added.

Install driver

Since GSPCA is incuded in the Linux kernel, you can use the following commands to install it.

  [  ] $ cd armadeus/
  [  ] $ make linux26-menuconfig

Then you need to choose the right driver. In the case of the LDLC webcam :

Device Drivers  --->
    Multimedia devices  --->
        [*] Video capture adapters  --->
            [*] V4L USB devices  --->
                <M> GSPCA based webcams  --->
                    <M> SPCA561 USB Camera Drivers

Now you can build the kernel and update the board.

  [  ] $ make

Load driver

As you can see, your device is now recognized as a camera.

  # dmesg
  ...
  usb 1-1: new full speed USB device using mxc-ehci and address 3
  usb 1-1: New USB device found, idVendor=04fc, idProduct=0561
  usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
  usb 1-1: Product: Generic Digital camera
  usb 1-1: Manufacturer: Sunplus Technology Co., Ltd.
  usb 1-1: configuration #1 chosen from 1 choice

You can load the kernel module using modprobe :

  # modprobe gspca_main
  Linux video capture interface: v2.00
  gspca: main v2.4.0 registered
  # modprobe gspca_spca561
  gspca: probing 04fc:0561
  gspca: probe ok
  usbcore: registered new interface driver spca561
  spca561: registered

To access your webcam, look at /dev/video0.

Links

• gspca v2 README