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Today's Topics:
1. Re: Questions about OFDM Implementation with GNU-Radio
(Michael Dickens)
2. UHD - glitches from tx_bursts (Howe, Louis)
3. Re: Redirecting UHD messages (Sanat Gulvadi)
4. Re: Access Violation When Running UHD on Windows XP 32-bit
with VS 9 - 2008 (Isaac Gerg)
5. Re: Using windows DLL (debug symbols on) gives error (Isaac Gerg)
----------------------------------------------------------------------
Message: 1
Date: Thu, 19 Apr 2012 12:02:38 -0400
From: Michael Dickens <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] Questions about OFDM Implementation with
GNU-Radio
Message-ID: <[email protected]>
Content-Type: text/plain; charset=us-ascii
Hi Amr - OFDM is not a USRP issue; your question is a GNU Radio issue. I
encourage you to email the GNU Radio Discussion list instead <
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >. I, and I'm sure
others, will reply further on that list if you email to it. - MLD
On Apr 19, 2012, at 9:37 AM, Amr Youssef wrote:
> While i am reading C++ blocks about Implementation of OFDM system (modulator
> and demodulator , i mean ) , there is mysterious concept faces me .
> In "digital_ofdm_mapper_bcv.cc" , there are a keyword called "occupied tones"
> and "occupied carriers " , i need any clarifications about it !
> Also , if any available algorithms , communications algorithms or books
> (references) which i can refer to them to relate those .cc codes to the
> communications concepts of OFDM , i kindly need it .
------------------------------
Message: 2
Date: Thu, 19 Apr 2012 19:52:26 +0000
From: "Howe, Louis" <[email protected]>
To: "[email protected]" <[email protected]>
Subject: [USRP-users] UHD - glitches from tx_bursts
Message-ID:
<2f80d95fd8c9ee4095fe56cea4dcd7cb363d0...@mlbmxus21.cs.myharris.net>
Content-Type: text/plain; charset="us-ascii"
Hello,
I'm using the UHD tx_bursts example to transmit bursts to a spectrum analyzer
set up with zero span, so I can see the burst envelope.
$ ./tx_bursts --repeat --rep-delay 0.5 --nsamps 800 --rate 10e6 --freq 915.1e6
--dilv
I see dropouts about every 36 us, which looks like my current spb (363 samples
per buffer of 1472 bytes).
<http://dl.dropbox.com/u/387748/uhd-debug-04192012/tx_bursts_fs_10_spb.gif>
I made the following change to tx_bursts.cpp:
size_t samps_to_send = std::min(total_num_samps - num_acc_samps, spb);
//ensure the the last packet has EOB set
//md.end_of_burst = samps_to_send <= spb;
md.end_of_burst = (total_num_samps - num_acc_samps) <= spb;
Now it's almost perfect.
<http://dl.dropbox.com/u/387748/uhd-debug-04192012/tx_bursts_fs_10_spb_fixed.gif>
However, I still see a brief dropout near the beginning of the burst:
<http://dl.dropbox.com/u/387748/uhd-debug-04192012/tx_bursts_fs_10_start.gif>
The timing of this dropout seems to track the DUC sample rate. Here it is with
--rate 2e6:
<http://dl.dropbox.com/u/387748/uhd-debug-04192012/tx_bursts_fs_2_start.gif>
Any idea what could be going wrong?
I'm using an N210 rev. 4, and I see this with both WBX and SBX.
UHD host version:
linux; GNU C++ version 4.4.3; Boost_104000; UHD_003.004.001-40-g7051b32b
UHD FPGA version:
003.004.001-0-release
Thu Apr 12 09:52:50 PDT 2012
$ sha1sum /usr/local/share/uhd/images/usrp_n210_*.bin
6b9388b3dfdf2f11eee3d5c5b92bfab998fc81c3
/usr/local/share/uhd/images/usrp_n210_fw.bin
65f0a60b285781523a2c92e72c1696c1c810616a
/usr/local/share/uhd/images/usrp_n210_r4_fpga.bin
Thanks,
Louis
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Message: 3
Date: Thu, 19 Apr 2012 22:59:27 +0200
From: Sanat Gulvadi <[email protected]>
To: Mike Roddewig <[email protected]>
Cc: [email protected]
Subject: Re: [USRP-users] Redirecting UHD messages
Message-ID:
<CAH12yLtMm2gbtoP+gZWAzsNsJDEb=yshk1nmhjjtyqfnq3c...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Have you tried commenting them out in host/lib/version.cpp ?
Had worked for me in the past.
Regards,
Sanat Gulvadi
On Apr 19, 2012 4:44 AM, "Mike Roddewig" <[email protected]> wrote:
> I need to redirect the UHD messages from stdout. I followed the example in
> the documentation and it does redirect all of the messages except for a
> version string that's printed at start-up. Example:
>
> linux; GNU C++ version 4.4.6 20110731 (Red Hat 4.4.6-3); Boost_104100;
> UHD_003.004.000-37-gbd3eeb51
>
> How do I disable or redirect this message?
>
> Thanks,
>
> Mike
>
> --
> Mike Roddewig <[email protected]>
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
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Message: 4
Date: Thu, 19 Apr 2012 18:25:40 -0400
From: Isaac Gerg <[email protected]>
To: Bastien Auneau <[email protected]>
Cc: [email protected]
Subject: Re: [USRP-users] Access Violation When Running UHD on Windows
XP 32-bit with VS 9 - 2008
Message-ID:
<cadnn3yxvloaypy4kty+lb6wbi9wfpwd3zvbsh_ccqu0aoxg...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Thanks for responding.
You have mismatched arch's in your tree. I'm not having that. I only have
the standard to warnings about the delay-loads. I am using v90 for
my compiler.
When trying to build with visual studio 10, the dang compilier (cl.exe)
keeps crashing! Uhg!
On Thu, Apr 19, 2012 at 6:34 AM, Bastien Auneau <[email protected]> wrote:
> Hi
>
> I had the same problem recently, and assumed I just had something wrong in
> my toolchain
> I have been using UHD 64 bit under Windows 7 the past half year, checking
> out the last code, compiling an using it several times. I use Visual Studio
> 2008. I compiled boost lib from source
>
> Using the last maint branch (3.4.1) I also have access violation anytime
> UHD code is called
> I attach a screenshot of depedency walker to this email
> In case the attach file doesn't make it through, it complains for :
> _ missing GPSVC.dll IESHIMS.dll MSVCR90D.dll
> _ also compains about almost all other DLL because they are x86 (while I
> built UHD 64bit)
>
> Hope this help
> Best Regards
> Bastien
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
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Message: 5
Date: Thu, 19 Apr 2012 18:27:13 -0400
From: Isaac Gerg <[email protected]>
To: [email protected]
Cc: [email protected]
Subject: Re: [USRP-users] Using windows DLL (debug symbols on) gives
error
Message-ID:
<cadnn3yx3eoeeng7wtanmhfpwtl8lwp6p4o4pb1zakfeaefh...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Hi Josh,
No difference and the dll dependency walker stuff looks clean (just
delay-load stuff which the interweb tells me is okay).
I am building with v90 and not v100 like you. I am trying to build with
v100 but the dang compiler keeps crashing even for simple hello world stuff.
I might just have to go back linux!
Isaac
On Wed, Apr 18, 2012 at 6:48 PM, Josh Blum <[email protected]> wrote:
>
>
> On 04/18/2012 03:40 PM, Isaac Gerg wrote:
> > Hi All,
> >
> > I have built a UHD windows DLL that has debug symbols in it. When I try
> to
> > use it with my program, i get the following error:
> > "The application failed to initialize properly"
> >
> > Nothing prints to the screen.
> >
> > I get this error even running the compiled version of
> uhd_find_devices.exe
> > using the debug dll i created. When I use the DLL that comes with the
> > latest windows build (no debug symbols) from the ettus site, I get a
> > different error. The program prints the following and then crashes (same
> > behavior I originally had before building my own uhd.dll with debug
> > symbols).
> >
> > "Win32; Microsoft Visual C++ version 10.0; Boost_104700;
> > UHD_003.004.001-0-release"
> >
> >
> Those installers were built with msvc 2010. Does installing the
> equivalent runtime make a difference?
> http://www.microsoft.com/download/en/details.aspx?id=5555
>
> And make sure dependency walker doesnt list any errors (just checking).
>
> -josh
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
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