For whoever is interested, I have a branched revision of the USRP1 FPGA
code ready that supports 16, 8, 4, 2, and 1-bit quantization. The
Verilog code is available for review in my developer's branch of the GNU
Radio SVN repository here:
http://gnuradio.org/svn/gnuradio/branches/developers/pc
Eric Blossom wrote:
On Sun, Feb 01, 2009 at 12:30:58AM -0500, Paul Creekmore wrote:
The FPGA on USRP1 sends an extra two bits of data with each 16-bit word
(to the FX2 chip). If I'm not mistaken, the first bit is set when
accompanying a sample from rx channel 0, and the second bit i
The FPGA on USRP1 sends an extra two bits of data with each 16-bit word
(to the FX2 chip). If I'm not mistaken, the first bit is set when
accompanying a sample from rx channel 0, and the second bit is set when
accompanying an inphase (as opposed to quadrature) sample (presumably
from channels
Eric Blossom wrote:
On Wed, Jan 21, 2009 at 09:50:41PM -0500, Paul Creekmore wrote:
Eric Blossom wrote:
On Wed, Jan 21, 2009 at 05:47:19PM -0500, Paul Creekmore wrote:
Thanks for answering your own question :-)
The USRP1 is little endian. My not-fully-considered thought is
Eric Blossom wrote:
On Wed, Jan 21, 2009 at 05:47:19PM -0500, Paul Creekmore wrote:
Paul Creekmore wrote:
Context: I'm adding new quantization (sample width) options to the
USRP FPGA configuration. (Long time in coming; yes, I know.)
Question: I'm seeing that in 8-bit
Paul Creekmore wrote:
Context: I'm adding new quantization (sample width) options to the
USRP FPGA configuration. (Long time in coming; yes, I know.)
Question: I'm seeing that in 8-bit mode, the USRP outputs samples from
its internal channels in the following sequence (an 8-bit,
Context: I'm adding new quantization (sample width) options to the USRP
FPGA configuration. (Long time in coming; yes, I know.)
Question: I'm seeing that in 8-bit mode, the USRP outputs samples from
its internal channels in the following sequence (an 8-bit, 8-channel
example):
1, 0,
Does GNU Radio reload the USRP FPGA configuration for every host-side
program execution, or is there some mechanism by which the lower-level
code can determine whether or not the currently loaded configuration
does not need to change?
I ask out of concern for the lifespan of the FPGA.
Thanks,
Johnathan Corgan wrote:
On Tue, Sep 30, 2008 at 11:17 AM, Paul Creekmore <[EMAIL PROTECTED]> wrote:
Previously, I had downloaded the gnuradio source code and compiled it to
gain access to the library in gnuradio/usrp/host/lib/legacy/.libs, and in
that case there's also a libu
Hi all,
I'm working in Ubuntu 8.04 writing code in C++ that access the USRP.
I'm trying to link to the usrp library (libusrp) with the -lusrp flag,
but g++ spits out the following error:
/usr/bin/ld: cannot find -lusrp
collect2: ld returned 1 exit status
In /usr/lib/ I find the following as
st enough..
Nagaraj,
PhD Candidate,
University of New South Wales
On Thu, Apr 10, 2008 at 6:36 AM, Paul Creekmore <[EMAIL PROTECTED]> wrote:
We'll be looking into the possibility of contributing the new FPGA
configuration to GNU Radio once our code has been tested and refined.
-
tions to the FPGA firmware
ourselves (mods for a much more application specific usage) and while
I'm not sure how far we'll get with needing the 4-bit samples, we'd
happily share any test/usage results if we get there.
Tyrel
On Apr 8, 2008, at 9:18 AM, Paul Creekmore wrote:
Tyre
Tyrel,
The current FPGA configuration does not support 4-bit samples, but it is
possible to modify the configuration (Verilog code) to convert the
samples to 4-bit.
My research group is currently working on adding 1, 2, and 4-bit
quantization options to the USRP, as well as accompanying data
Michael Dickens wrote:
On Mar
24, 2008, at 10:12 PM, Jonathon Pendlum wrote:
"/usr/bin/ld: cannot find -lfftw3f"
This even occurs if I try to compile the howto example. Another
member on my team has installed FFTW3, so I'm not sure why I am
getting this error. Can anyone help me out? Thanks!
It would be helpful to know exactly what you mean by "this isn't
happening." What /does/ happen? Anything? Do you get a data file?
Have you tried recording and plotting a simple test sinewave?
You could also very easily convert the data in MATLAB.
--Paul
Phaysal Khan wrote:
Hi,
I used us
I really don't think you should be getting any error messages. Could
you copy the entire error message into an email? I might not be able to
identify the problem, but maybe someone else on the list can. In the
mean time, let's verify receipt of a test signal through the USRP.
I recommend ru
I'd start by running usrp_benchmark_usb.py It's a USB speed test
script, and it will verify proper communication with the USRP. The
script is located in /usr/local/share/gnuradio/examples/usrp/ on my
Linux installation.
Do you have a DBSRX daughter card to receive GPS frequencies? If that's
Faisal,
I'm at Purdue University working toward using the USRP for GNSS
applications. Check my understanding: are you wanting to use the USRP
to record, say, L1 band samples directly to a data file? Would you be
performing all of the signal acquisition and tracking in post-processing
with a
Prasanna,
I have the datasheet you're looking for. I had to ask Microtune for it;
it's not online. I'll send it to you in a separate email.
--Paul
Prasanna Rao wrote:
Hii all,
I purchased Mircotune's 4937-DI5 Tuner from Ettus LLC in December last
year.. I got the 3X7901 one. How differen
Nick Stephens wrote:
Hello Everyone - I am doing my best to understand how the TVRx board
works. I have Rev. 3 of the TV board, with MicroTuner module with IF of
~44 MHz.
(Preface - Thanks for your patience, as I am relatively new to GNU radio
and the USRP!)
In my experiment, I have an 80 MHz s
rry for the long text.
Best regards,
Carles Fernandez
Carles,
I'm just announcing my presence on the list: I'm the graduate research
assistant at Purdue University in charge of GNU Radio efforts, including
applications for GNSS. We are in a fairly early stage of development,
but I watch
Johnathan Corgan wrote:
Paul Creekmore wrote:
The only package I've ever installed was 3.0.2. I've done so once with
Synaptic Package Manager and once with apt-get.
I see no mention of usrpm. Specifically, usrp_fft.py imports usrp.py,
and usrp.py imports usrp_prims and usrp_dbi
.
--Paul
Johnathan Corgan wrote:
Paul Creekmore wrote:
When I attempt to run any python example script or utility that includes
usrp.py, I get the following error message:
Traceback (most recent call last):
File "./usrp_fft.py", line 24, in ?
from gnuradio import usrp
File &quo
When I attempt to run any python example script or utility that includes
usrp.py, I get the following error message:
Traceback (most recent call last):
File "./usrp_fft.py", line 24, in ?
from gnuradio import usrp
File "/usr/lib/python2.4/site-packages/gnuradio/usrp.py", line 24, in ?
im
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