i.MX ProcessorsのトピックRe: Reg: USB CAM

Reg: USB CAM

vishvapathi — Tue, 03 Dec 2013 14:00:36 GMT

Hi All,

I am interested to interface USB CAM with my IMX processor. Is it possible to interface Dome or Bullet Camera with USB interface with IMX 6Q processor and Linux OS.

Thanks

DaianeAngolini

winstonrodrigues

chandrasekarkanniappan

Re: Reg: USB CAM

Yuri — Wed, 04 Dec 2013 02:46:24 GMT

Please use UVC cam(s).

"Using a USB Camera with GStreamer"

https://community.freescale.com/docs/DOC-93688

Re: Reg: USB CAM

daiane_angolini — Wed, 11 Dec 2013 18:24:25 GMT

Hi vishvapathi,

I hope YuriMuhin_ng´s reply is enough. Please let us know :smileywink:

Re: Reg: USB CAM

vishvapathi — Fri, 13 Dec 2013 13:02:27 GMT

Hi,

I have a Logitech C270 web CAM which is UVC compatible. when i connect it to my Mars board i get the following

"usb 2-1.2: new high speed USB device number 3 using fsl-ehci

3:3:2: cannot set freq 24000 to ep 0x86"

and i didnt find video0 in my /dev.. there is only video16-19.

Re: Reg: USB CAM

vishvapathi — Fri, 13 Dec 2013 13:04:25 GMT

And response for $ gst-launch v4l2src ! mfw_v4lsink

MFW_GST_V4LSINK_PLUGIN 3.0.7 build on Oct 15 2013 15:08:57.

Setting pipeline to PAUSED ...

ERROR: Pipeline doesn't want to pause.

ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Cannot identify.

Additional debug info:

v4l2_calls.c(493): gst_v4l2_open (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:

system error: No such file or directory

Setting pipeline to NULL ...

Total rendered:0

Freeing pipeline ...

[--->FINALIZE v4l_sink

Re: Reg: USB CAM

Raybiztech — Fri, 13 Dec 2013 14:02:49 GMT

Hi Vishvapathi Karnan,

Inserting 'videodev.ko' and 'uvcvideodev.ko' modules may solve your problem. This will create an entry for video0 in /dev/. Can you please post the output of 'lsmod' on Mars board.

Thanks & Regards,

RBT

Re: Reg: USB CAM

vishvapathi — Fri, 13 Dec 2013 14:20:50 GMT

gst-launch v4l2src ! mfw_v4lsink
Division by zero in kernel.
[<800460b0>] (unwind_backtrace+0x0/0xfc) from [<80221b14>] (Ldiv0+0x8/0x10)

[<80221b14>] (Ldiv0+0x8/0x10) from [<80254138>] (mxcfb_check_var+0x128/0x314)

[<80254138>] (mxcfb_check_var+0x128/0x314) from [<8023c2a8>] (fb_set_var+0x44/0)

[<8023c2a8>] (fb_set_var+0x44/0x2a4) from [<8035179c>] (release_disp_output+0xf)

[<8035179c>] (release_disp_output+0xfc/0x164) from [<80352f5c>] (mxc_vout_relea)

[<80352f5c>] (mxc_vout_release+0x64/0x70) from [<80344f70>] (v4l2_release+0x54/)

[<80344f70>] (v4l2_release+0x54/0x78) from [<800ed858>] (fput+0xb0/0x1e8)
[<800ed858>] (fput+0xb0/0x1e8) from [<800ea09c>] (filp_close+0x64/0x84)
[<800ea09c>] (filp_close+0x64/0x84) from [<800ea160>] (sys_close+0xa4/0xe0)

[<800ea160>] (sys_close+0xa4/0xe0) from [<80040580>] (ret_fast_syscall+0x0/0x30)

Division by zero in kernel.
[<800460b0>] (unwind_backtrace+0x0/0xfc) from [<80221b14>] (Ldiv0+0x8/0x10)
[<80221b14>] (Ldiv0+0x8/0x10) from [<8024dbfc>] (ldb_disp_setup+0xd0/0x160)

[<8024dbfc>] (ldb_disp_setup+0xd0/0x160) from [<80252940>] (mxcfb_set_par+0x34/)

[<80252940>] (mxcfb_set_par+0x34/0x4dc) from [<8023c3cc>] (fb_set_var+0x168/0x2)

[<8023c3cc>] (fb_set_var+0x168/0x2a4) from [<8035179c>] (release_disp_output+0x)

[<8035179c>] (release_disp_output+0xfc/0x164) from [<80352f5c>] (mxc_vout_relea)

[<80352f5c>] (mxc_vout_release+0x64/0x70) from [<80344f70>] (v4l2_release+0x54/)

[<80344f70>] (v4l2_release+0x54/0x78) from [<800ed858>] (fput+0xb0/0x1e8)
[<800ed858>] (fput+0xb0/0x1e8) from [<800ea09c>] (filp_close+0x64/0x84)
[<800ea09c>] (filp_close+0x64/0x84) from [<800ea160>] (sys_close+0xa4/0xe0)

[<800ea160>] (sys_close+0xa4/0xe0) from [<80040580>] (ret_fast_syscall+0x0/0x30)

------------[ cut here ]------------
WARNING: at mm/page_alloc.c:2106 __alloc_pages_nodemask+0x510/0x6f0()
Modules linked in:

[<800460b0>] (unwind_backtrace+0x0/0xfc) from [<8006b3b0>] (warn_slowpath_commo)

[<8006b3b0>] (warn_slowpath_common+0x4c/0x64) from [<8006b3e4>] (warn_slowpath_)

[<8006b3e4>] (warn_slowpath_null+0x1c/0x24) from [<800bb20c>] (__alloc_pages_no)

[<800bb20c>] (__alloc_pages_nodemask+0x510/0x6f0) from [<80049380>] (__dma_allo)

[<80049380>] (__dma_alloc+0xa0/0x2fc) from [<8004962c>] (dma_alloc_writecombine)

[<8004962c>] (dma_alloc_writecombine+0x24/0x2c) from [<80252d08>] (mxcfb_set_pa)

[<80252d08>] (mxcfb_set_par+0x3fc/0x4dc) from [<8023c3cc>] (fb_set_var+0x168/0x)

[<8023c3cc>] (fb_set_var+0x168/0x2a4) from [<8035179c>] (release_disp_output+0x)

[<8035179c>] (release_disp_output+0xfc/0x164) from [<80352f5c>] (mxc_vout_relea)

[<80352f5c>] (mxc_vout_release+0x64/0x70) from [<80344f70>] (v4l2_release+0x54/)

[<80344f70>] (v4l2_release+0x54/0x78) from [<800ed858>] (fput+0xb0/0x1e8)
[<800ed858>] (fput+0xb0/0x1e8) from [<800ea09c>] (filp_close+0x64/0x84)
[<800ea09c>] (filp_close+0x64/0x84) from [<800ea160>] (sys_close+0xa4/0xe0)

[<800ea160>] (sys_close+0xa4/0xe0) from [<80040580>] (ret_fast_syscall+0x0/0x30)

---[ end trace 1b75b31a2719ed1f ]---
mxc_sdc_fb mxc_sdc_fb.0: Unable to allocate framebuffer memory
detected fb_set_par error, error code: -12
mxc_v4l2_output mxc_v4l2_output.0: ERR: fb_set_var.
MFW_GST_V4LSINK_PLUGIN 3.0.7 build on Oct 15 2013 15:08:57.
Setting pipeline to PAUSED ...
ERROR: Pipeline doesn't want to pause.

ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Cannot identify.

Additional debug info:

v4l2_calls.c(493): gst_v4l2_open (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:

system error: No such file or directory
Setting pipeline to NULL ...
Total rendered:0
Freeing pipeline ...
[--->FINALIZE v4l_sink
root@freescale ~$ lsmod
Module	Size Used by

Re: Reg: USB CAM

Raybiztech — Fri, 13 Dec 2013 14:30:31 GMT

Hi Vishvapathi Karnan,

In the command

gst-launch v4l2src ! mfw_v4lsink

v4l2src will look for the device file /dev/video0. If it is not there it will throw an error. Please insert the modules 'videodev.ko' and 'uvcvideodev.ko' and check for the device file in /dev directory. Now run the above command. If still this error persists post the output of 'lsmod'.

Thanks & Regards,

RBT

Re: Reg: USB CAM

vishvapathi — Fri, 13 Dec 2013 15:41:10 GMT

Hi,

insmod videodev.ko
insmod: can't insert 'videodev.ko': No such file or directory
root@freescale /$ insmod uvcvideodev.ko
insmod: can't insert 'uvcvideodev.ko': No such file or directory

root@freescale /$ modprobe uvcvideodev.ko

Where can i find the files?? i tried to locate it, but didnt succeed

Re: Reg: USB CAM

vishvapathi — Fri, 13 Dec 2013 15:49:02 GMT

i found uvcvideo.ko in rootfs/lib/modules/3.0.35-2508-g54750ff/kernel/drivers/media/video/uvc

where should i look for videodev.ko???

Re: Reg: USB CAM

Raybiztech — Sat, 14 Dec 2013 05:39:27 GMT

Hi,

You can find videodev.ko in rootfs/lib/modules/3.0.35-2508-g54750ff/kernel/drivers/media/video/. If you cannot find videodev.ko there, try to run ./ltib -m config and enable "Configure the kernel" option in the menu list, exit and save the configuration. Then run ./ltib. Now enable following options in Kernel configuration:

Device Drivers--> Multimedia Support--> Video for Linux

Device Drivers--> USB Support --> USB Gadget Support-->USB Webcam Gadget

Build them as modules.

Now

insmod /lib/modules/3.0.35-2508-g54750ff/kernel/drivers/usb/gadget/g_webcam.ko

insmod /lib/modules/3.0.35-2508-g54750ff/kernel/drivers/media/video/videodev.ko

Thanks & Regards,

RBT

Re: Reg: USB CAM

vishvapathi — Sat, 14 Dec 2013 06:48:10 GMT

Hi,

insmod /lib/modules/3.0.35-2666-gbdde708/kernel/drivers/usb/ga

dget/g_webcam.ko

g_webcam: disagrees about version of symbol module_layout

insmod: can't insert '/lib/modules/3.0.35-2666-gbdde708/kernel/drivers/usb/gadget/g_webcam.ko': invalid module format

root@freescale /$ insmod /lib/modules/3.0.35-2666-gbdde708/kernel/drivers/media/

video/videodev.ko

videodev: disagrees about version of symbol module_layout

insmod: can't insert '/lib/modules/3.0.35-2666-gbdde708/kernel/drivers/media/video/videodev.ko': invalid module format

Re: Reg: USB CAM

Raybiztech — Sat, 14 Dec 2013 07:01:54 GMT

HI,

I think kernel headers and versions used to build g_webcam.ko and videodev.ko are not matching with the kernel headers of your rootfs. So use the same kernel image (uImage) from which you are building the g_webcam.ko and videodev.ko modules in the rootfs.

Thanks & Regards,

RBT

Re: Reg: USB CAM

vishvapathi — Sat, 14 Dec 2013 08:12:14 GMT

ya... the kernel version given by marsboard is 3.0.15 and the LTIB version is 3.0.35. Where can i get Linux-3.0.15 kernel?? so i will select ltib with 3.0.15...

Re: Reg: USB CAM

Raybiztech — Sat, 14 Dec 2013 08:34:44 GMT

Hi,

You can choose your required kernel version 3.0.15 from LTIB. Mention the below following steps

-> cd to your ltib path

-> ./ltib -m config

-> you can see an option

kernel (Linux 3.0.35) ---->

-> click on the above option you can change the kernel version to 3.0.15

-> save the configuration

-> ./ltib

Thanks & Regards,

RBT

Re: Reg: USB CAM

vishvapathi — Sat, 14 Dec 2013 08:39:31 GMT

i did try that.. but LTIB comes with only 3.0.35 package.. i was not able to find the package for 3.0.15 in /opt....

Re: Reg: USB CAM

Raybiztech — Sat, 14 Dec 2013 08:48:54 GMT

Hi,

Download the kernel source code from https://www.kernel.org/pub/linux/kernel/v3.0/ and copy it in the /opt/...packages. And then try the above mentioned steps.

Thanks & Regards,

RBT

Re: Reg: USB CAM

vishvapathi — Sat, 14 Dec 2013 08:51:47 GMT

Hi RBT,

I tried that also.. it requires some other files also.. which i am not able to find.. :-(

Processing: kernel-3.0.15

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

Build path taken because: build key set, no prebuilt rpm,

Testing network connectivity

OK GPP:

Try linux-3.0.15-imx_12.08.00.bz2.md5 from the GPP

http://bitshrine.org/gpp/linux-3.0.15-imx_12.08.00.bz2.md5:

13:56:23 ERROR 404: Not Found.

Try linux-3.0.15-imx_12.08.00.bz2 from the GPP

http://bitshrine.org/gpp/linux-3.0.15-imx_12.08.00.bz2:

13:56:24 ERROR 404: Not Found.

Can't get: linux-3.0.15-imx_12.08.00.bz2 at ./ltib line 802.

Re: Reg: USB CAM

Raybiztech — Sat, 14 Dec 2013 09:12:16 GMT

HI,

I think the problem is with the tar extension as it is searching for tar.bz2 you need to place the linux kernel with tar.bz2 in /opt... You can also try with an other option through menuconfig

-> ./ltib -m config

-> kernel (Linux 3.0.35) ---->

( x ) enable local linux directory build

-> Below of the above option in menuconfig you can see the following option

( ) Enter your linux source directory

-> click on the option and give your path of the linux kernel 3.0.15

-> save the configuration

-> run ./ltib

Thanks & Regards,

RBT

Re: Re: Reg: USB CAM

vishvapathi — Sat, 14 Dec 2013 09:17:35 GMT

I dont think the prob is with extension... Attached spec.in file for ref.

It looks for IMX_12.00.80 release. which is not in pkg.. i tried to find it online.. but not able to.... :smileyconfused: