Hi all,

TIVidenc1 can UDP stream H264 video through wire ethernet LAN. However, when I switch from wired LAN to radio LAN, TIVidenc1 can no more stream H264 video with the same performance as before. I suspected it had something to do with frames being dropped by radio connection, so I did the following test: I put TIVidenc1 to UDP stream H264 video through wire and then I rapidly disconnected the wire and connected it again. The performance went way down. Why does that happen? Is there any parameter I can configure in this codec to make this error go away?

Att,
Leandro R Lustosa
 
MSc Student of Electronics and Computer Engineering
Department of Systems and Control

Instituto Tecnológico de Aeronáutica - ITA
São José dos Campos - SP - Brasil
Tel.(Cel): + 55 12 8195-7651


TIVidenc1 can UDP stream H264 video through wire ethernet LAN. However, when I switch from wired LAN to radio LAN, TIVidenc1 can no more stream H264 video with the same performance as before. I suspected it had something to do with frames being dropped by radio connection, so I did the following test: I put TIVidenc1 to UDP stream H264 video through wire and then I rapidly disconnected the wire and connected it again. The performance went way down. Why does that happen? Is there any parameter I can configure in this codec so this error go away?


Em 04/05/2011, às 22:44, gumstix-users-request@lists.sourceforge.net escreveu:

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Today's Topics:

  1. Re: Notification: dvsdk on gumstix (AJ ONeal)
  2. Re: [SOLVED] gpio_request failed (Mathias Kriebel)
  3.  DMA / McBSP help (ScottEllis)
  4. Re: DMA / McBSP help (ScottEllis)
  5. Re: TI Tech Days - San Jose (May 3rd) and Sandia's Strongbox
     mini super-computer (Ben Johnson)
  6. Re: Gumstix + HTTP server (AKS)


----------------------------------------------------------------------

Message: 1
Date: Wed, 4 May 2011 12:35:51 -0600
From: AJ ONeal <coolaj86@gmail.com>
Subject: Re: [Gumstix-users] Notification: dvsdk on gumstix
To: Yang Chenhui <yang.ch@asu.edu>, "General mailing list for gumstix
users." <gumstix-users@lists.sourceforge.net>
Message-ID: <BANLkTinzA7Bgn7kWewJ6JVRoq6CjWRxgng@mail.gmail.com>
Content-Type: text/plain; charset="windows-1252"

Chenhui,

I'm including this on the gumstix mailing list so we can continue our
discussion there.
https://lists.sourceforge.net/lists/listinfo/gumstix-users
(Just be sure to CC me when you want the message to come directly into my
inbox.)

Go ahead and look here:
https://wiki.linaro.org/Boards/Overo/Setup
https://wiki.linaro.org/Resources/ToolchainInstall-10

And perhaps here:
http://wiki.gumstix.org/index.php?title=Linaro

Once you have the Linaro toolchain and pre-built image you can run the
script here:
https://bitbucket.org/thayne/ti-omap-tools/src

After that there are a few tweaks you may need to make before the DVSDK will
compile successfully.

AJ ONeal


On Wed, May 4, 2011 at 12:18 PM, Yang Chenhui <yang.ch@asu.edu> wrote:

thanks for your timely reply.
I use gumstix Overo? Fire COM.
do you know if we can build kernel with gui?


which mail list you refer ? please let me know. I will post it.
chenhui



On Wed, May 4, 2011 at 10:32 AM, AJ ONeal <coolaj86@gmail.com> wrote:

Yes, first you should git clone the kernel you need from sakoman

git clone git://www.sakoman.com/git/linux-omap-2.6

The next step depends on which toolchain you wish to use.
To get a quick test up and running I would suggest using Linaro. Their
setup is much faster than OpenEmbedded's.

Can you tell me more about your setup?

Also, can we continue our discussion on the mailing list so that everyone
can benefit from it?

AJ ONeal

On Wed, May 4, 2011 at 10:55 AM, Bitbucket <
notifications-noreply@bitbucket.org> wrote:

You have received a notification from chenh.

hello
AJ ONeal-3

My name is chenhui, working on gumstix. I find your post about dvsdk @
http://old.nabble.com/-OT--ti-omap-tools---script-for-setting-up-DVSDK-3-with-various-toolchains-p31444010.html
I am not sure how to build kernel for gumstix with the dvsdk support.
have you done this ?.

my email is:  chen.h.yang@gmail.com
thanks for your help

chenhui

--
Change your notification settings at
https://bitbucket.org/account/notifications/




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Message: 2
Date: Wed, 4 May 2011 16:31:19 -0300
From: Mathias Kriebel <mathias_kriebel@hotmail.com>
Subject: Re: [Gumstix-users] [SOLVED] gpio_request failed
To: <gumstix-users@lists.sourceforge.net>
Message-ID: <SNT123-W473D03E62D377E58B2080A85810@phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"


I've found the error, I was simply using a different variable (that was not set) than that I was setting with the gpio number.
Sorry for the thread.

Mathias
    
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Message: 3
Date: Wed, 4 May 2011 13:18:25 -0700 (PDT)
From: ScottEllis <scottellis.developer@gmail.com>
Subject: [Gumstix-users]  DMA / McBSP help
To: gumstix-users@lists.sourceforge.net
Message-ID: <31545142.post@talk.nabble.com>
Content-Type: text/plain; charset=us-ascii


I am trying to send data out the McBSP3 controller using dma, but I keep
getting a DMA misaligned error.

I am allocating the memory with kzmalloc(4096, GFP_KERNEL | GFP_DMA) and
then
getting a dma_addr_t handle with dma_map_single(). I'm allocating 4096 for
debug, 1024 doesn't work either.

My TO_DEVICE is the McBSP3 DXR register and I'm using the dma_tx_sync for
this
device from arch/arm/mach-omap2/mcbsp.c OMAP24XX_DMA_MCBSP3_TX. The same as
the
in tree plat/mcbsp.c driver uses.

Here is some debug output, the first part setting up, the second part is
after
a write when my dma callback is invoked. I am only trying one 16 byte write
operation.

root@overo:~# insmod ecbsp.ko
[ 8589.576599] tx_reg [MCBSP3.DXR] = 0x49024008  dma_tx_sync = 17
[ 8589.582550] Initializing dma blocks
[ 8589.586090] block[0] data ptr: cfadb000  dma handle: 0x8FADB000

root@overo:~# echo start > /dev/ecbsp
[ 8591.761169] dma_channel = 4
[ 8591.764709] calling omap_start_dma
[ 8591.768157] DMA misaligned error with device 17
[ 8591.772705] ecbsp_dma_callback ch_status [CSR4]: 0x0800
[ 8591.777954] ecbsp_mcbsp_stop


The memory looks aligned to me. Not necessary, but I run the pointer through
the IS_ALIGNED() macro and it doesn't complain. I've used similar code to
read
from the McBSP3 controller using DMA without problems.

I also tried allocating my memory using __get_free_pages() but the results
were the same.

Any ideas? I'm scratching my head on where to look next.

Thanks,
Scott

--
View this message in context: http://old.nabble.com/DMA---McBSP-help-tp31545142p31545142.html
Sent from the Gumstix mailing list archive at Nabble.com.




------------------------------

Message: 4
Date: Wed, 4 May 2011 14:25:53 -0700 (PDT)
From: ScottEllis <scottellis.developer@gmail.com>
Subject: Re: [Gumstix-users] DMA / McBSP help
To: gumstix-users@lists.sourceforge.net
Message-ID: <31545592.post@talk.nabble.com>
Content-Type: text/plain; charset=us-ascii


If its useful, the non-working code is posted here

https://github.com/scottellis/ecbsp

Ignore the mcbsp_config settings unless you think that is the problem.
It's a new project, I took a WAG at the McBSP regs. While flailing today
I was making 'random' changes. Right now I don't think they are the
problem and I can straighten them out later.
--
View this message in context: http://old.nabble.com/DMA---McBSP-help-tp31545142p31545592.html
Sent from the Gumstix mailing list archive at Nabble.com.




------------------------------

Message: 5
Date: Wed, 4 May 2011 19:07:45 -0600
From: Ben Johnson <myalphabetfamily@gmail.com>
Subject: Re: [Gumstix-users] TI Tech Days - San Jose (May 3rd) and
Sandia's Strongbox mini super-computer
To: don@gumstix.com, "General mailing list for gumstix users."
<gumstix-users@lists.sourceforge.net>
Message-ID: <BANLkTi=ae9jL0JF7rTOctQF9E2SrGPbEZw@mail.gmail.com>
Content-Type: text/plain; charset=windows-1252

Don,
 Thanks for the post.  I noticed this line in the press release "The
cluster also previews the upcoming generation of Gumstix Overo COM's
built with TI's 1GHz DM37x DaVinci? digital media processors."  So I
guess that means we should be seeing these soon?

Thanks,
Ben

On Mon, May 2, 2011 at 12:14 PM, Don Anderson <don@gumstix.com> wrote:
If you are attending TI Tech Days in San Jose tomorrow (May 3rd), you may
want to check out the Gumstix-based, mini super-computer called Strongbox by
Sandia National Laboratories.

In this version of Strongbox, Sandia's MegaTux team has combined 196 Overo
Tide COMs onto 28 Stagecoach boards. About the size of a medium suitcase,
Strongbox has been developed to demonstrate botnet behavior, a
proto-deployment of the MegaTux project at Sandia.

More information about Strongbox at TI Tech Days San Jose 2011 is available
here.

I will be attending TI Tech Days tomorrow so perhaps will see you there.


Don Anderson
@ Gumstix
======================

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------------------------------

Message: 6
Date: Thu, 5 May 2011 11:44:21 +1000
From: AKS <aungkyas@gmail.com>
Subject: Re: [Gumstix-users] Gumstix + HTTP server
To: Eduardo Silva <edsiper@gmail.com>
Cc: "General mailing list for gumstix users."
<gumstix-users@lists.sourceforge.net>
Message-ID: <BANLkTimoC2qH1kS35iWjYJ8gR39LF3K78A@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

Hi

I see your point. Any idea for the resource Apache will consume? Just curious
as I want to have a web server on my Gumstix too and was thinking of Apache.

Also I have seen an article about http server on a 8 bits PIC microcontroller
in a popular electronics magazine years ago. They also publish source code,
I am not sure it is a full fledged web server that you may enviion but
I think the
link below is such PIC servers. My 2 cents!

http://www.sics.se/~adam/miniweb/

Please kindly update here if you have ported/develop a web server to Gumstix.
Cheers!

On 5/4/11, Eduardo Silva <edsiper@gmail.com> wrote:
On Wed, May 4, 2011 at 10:25 AM, AKS <aungkyas@gmail.com> wrote:

I thought we could run Apache on Ubuntu/Gumstix. Not true?


Yes you can, but a normal Apache insance takes a couple of MB in memory, not
the right option for embedded.



On 5/4/11, Eduardo Silva <edsiper@gmail.com> wrote:
Hi All,

most of you are designing new products and integrating different SW
stack
on
it, for those who requires a HTTP server, what are your requirements ?,
what
do you expect from a embedded HTTP server ?, what is missing in the
current
solutions ?

As we are developing an open source solution, your comments are very
important for us,

thanks,

--
Eduardo Silva
http://edsiper.linuxchile.cl
http://www.monkey-project.com



------------------------------------------------------------------------------
WhatsUp Gold - Download Free Network Management Software
The most intuitive, comprehensive, and cost-effective network
management toolset available today.  Delivers lowest initial
acquisition cost and overall TCO of any competing solution.
http://p.sf.net/sfu/whatsupgold-sd
_______________________________________________
gumstix-users mailing list
gumstix-users@lists.sourceforge.net
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--
Eduardo Silva
http://edsiper.linuxchile.cl
http://www.monkey-project.com




------------------------------

------------------------------------------------------------------------------
WhatsUp Gold - Download Free Network Management Software
The most intuitive, comprehensive, and cost-effective network
management toolset available today.  Delivers lowest initial
acquisition cost and overall TCO of any competing solution.
http://p.sf.net/sfu/whatsupgold-sd

------------------------------

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End of gumstix-users Digest, Vol 61, Issue 15
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