I just upgraded my ports-installed version of GR 3.6.3 to
GR 3.7.2.1 with a simple port upgrade gnuradio.
The install went smoothly without errors and installed
a working copy of 3.7.2.1 with only a few operational
issues.
Hats off to Michael Dickens for his superb job of supporting
GnuRadio on
GnuRadio 3.7.2.1
OSX 10.8.5
I was setting up a flowgraph in GRC using the
mpsk_receiver_cc block and encountered a problem.
Don't know if it is a bug in the GRC xml or a
missing method in the block code.
In GRC, the mpsk_receiver's loop_bandwidth parameter
is underlined in the properties popup,
On 3/26/14 8:08 PM, Gayathri Ramasubramanian wrote:
...
Though I have burned the latest images of usrp_n210_fw.bin and
usrp_n210_fpga_r4.bin into usrp ,still it is not working. I get the foll
error message:
Error:Runtime Error
Please update the firmware and fpga images for your device
I've seen it stated here on the list that the MPSK receiver
block will work for either QPSK or OQPSK (Offset QPSK).
Anyone know if it will work with Shaped Offset QPSK
(SOQPSK) or the ARTM defined SOQPSK-TG?
@(^.^)@ Ed
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Hi Michael,
A short while ago, I installed 3.7.2.1 from your macports
implementation. The install went without trouble, and
I've been composing and running flowgraphs from GRC
with no issues.
I recently tried to port one of my custom blocks up to
the 3.7 api, and I encountered problems. In
Being more of an implementer than a mathematical theorist, I'm
having trouble translating the language spoken by our
local Matlab/Simulink boffins.
What's the proper way to implement an Integrate and Dump
operation in GnuRadio. I've come across several mutually
contradictory suggestions.
Connect up a null sink and null source in parallel with the uhd blocks. Then
right- mouse on the uhd blocks and select disable. This will gray-out the
blocks and not compile them, but will leave them there preserving all your
parameters.
@(^.^)@ Ed
Sent from my iPod
On Apr 8, 2014, at
On 4/10/14 3:55 PM, Tom Rondeau wrote:
I personally like this new method a lot. The downside is that if you
aren't paying attention, you might enter the wrong thing and hit ok or
enter only to find out then that you made an error and will have to
reopen the properties box to fix it.
In
When using a Freq. Xlating FIR filter with decimation and taps
both set to 1, what determines the practical lower limit
for the resolution of the freq change?
@(^.^)@ Ed
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How do I find the index of the max value in a vector from GRC?
The max_xx block outputs the max value, but not its
index, despite what it's documentation says:
Data is passed in as a vector of length from multiple input sources.
It will look through these streams of data items and output two
With the new use of C++ namespaces in the 3.7 API, is
it possible for an Out-of-tree (OOT) module to create blocks
that are part of an existing GR namespace?
For instance, if I have a new block that processes digital
data streams, can I create an OOT module called digital
and add my block to it?
I've recently converted to GR 3.7, and am currently on 3.7.3.
I have created and run a new block in C++, but now want to add
an accessor method to the block's class. I defined it in
new_class_name_impl.h , in the public part of the
class declaration as follows:
float
On 6/6/14 1:50 PM, Martin Braun wrote:
You also need to add the accessor in the include/*.h file as a virtual
member function.
Thanks Martin. That did it, although I had to rerun cmake to get it
to propagate into the swig files.
@(^.^)@ Ed
On 6/6/14 2:30 PM, Ed Criscuolo wrote:
On 6/6/14 1:50 PM, Martin Braun wrote:
You also need to add the accessor in the include/*.h file as a virtual
member function.
Thanks Martin. That did it, although I had to rerun cmake to get it
to propagate into the swig files.
Guess I spoke too
On 6/6/14 3:20 PM, Tom Rondeau wrote:
On Fri, Jun 6, 2014 at 3:02 PM, Ed Criscuolo
edward.l.criscu...@nasa.gov mailto:edward.l.criscu...@nasa.gov wrote:
On 6/6/14 2:30 PM, Ed Criscuolo wrote:
On 6/6/14 1:50 PM, Martin Braun wrote:
You also need to add the accessor
On 7/16/14 9:50 PM, Jordan Johnson wrote:
After finishing my AM Stereo transmitter, I have decided to build an
NTSC modulator. I think I have the actually modulation and filter blocks
down, I just need to firgure out how to get the right signals from a
digital video file. The file source
On 7/16/14 10:52 AM, Peter A. Bigot wrote:
GNU Radio is a great tool for applications and dynamic experimentation,
but it doesn't have a lot of support for static/offline analysis of
time-series data. I.e. I've captured some signal data and I want to
explore its properties interactively so I
Michael,
Thanks for the rapid response!
Did a sync and tried installing it, and got the following
error while it was working off the dependencies:
[eds-mac:edwardc] edwardc% sudo port
MacPorts 2.2.1
Entering interactive mode... (help for help, quit to quit)
[edwardc] install gr-mac
---
Yep, that was me. I was getting to pipe-in with the same suggestion.
@(^.^)@ Ed
On 10/10/14 8:20 PM, Vanush Vaswani wrote:
I ran into this problem when doing 57.6kbps BPSK decoding, AX.25. The
only way I was able to fix it was to reduce GR_FIXED_BUFFER_SIZE in
flat_flowgraph.cc.
This is
On 10/10/14 9:15 PM, John Malsbury wrote:
Sounds dangerous if you also happen to have very high throughput
applications to run? Am I wrong?
Yes, it was a fine line between getting it small enough for acceptable
latency while still maintaining enough throughput to not overrun.
Fortunately for
I'm using a vector-insert block to add a fixed-size header to a
stream of interleaved short samples at a fixed interval, and
then running it though
stream-to-tagged-stream = tagged-stream-to-PDU = Socket-PDU
to wrap it up in a UDP packet and send it out the network.
The header consists of 28
I'm trying to use the Packet Header Generator block
(not the Default one) from within GRC to generate a
packet header formatted to my own specification in
order to match an existing protocol.
I assume that an appropriate formatter object can
be submitted to this block to instruct it to build an
On 11/14/14 4:49 PM, Tom Rondeau wrote:
On Fri, Nov 14, 2014 at 3:14 PM, Ed Criscuolo
edward.l.criscu...@nasa.gov mailto:edward.l.criscu...@nasa.gov wrote:
I'm trying to use the Packet Header Generator block
(not the Default one) from within GRC to generate a
packet header formatted
Since I'm local, I plan to be there!
@(^.^)@ Ed
On 11/30/11 10:10 AM, Tom Rondeau wrote:
The GNU Radio Users Group (GRUG) meeting is tonight at the WinnForum's
conference!
8PM in Regency C of the Hyatt Regency Crystal City (in Arlington, VA).
We'll chat for an hour or so then head on to the
In a less mathematical and more qualitative explanation, consider that
at any point in time, one bit of your signal is spread out over a wide
frequency spectrum. If you think of adding up all of the measurements
of little frequency bins across the whole spread spectrum, the noise
in each bin,
I have a vector quantity (size 1024), and I want to do a calculation
on it such that v_out[i] = v_in[i] - v_in[i-1]
Is such a calculation possible in GRC? I haven't found any way to
get a hold of the individual elements of a vector.
@(^.^)@ Ed
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by 1
sample, subtract one stream from the other, and then convert the resulting
(difference) stream back to a vector.
-Cam
-Original Message-
From: discuss-gnuradio-bounces+callen=mitre@gnu.org
[mailto:discuss-gnuradio-bounces+callen=mitre@gnu.org] On Behalf Of Ed
Criscuolo
just be worried about the first or last subtraction - you might only
get a length 1023 vector out at the end.
When you link it up, can you tell whether it produces reasonable results?
-Original Message-
From: Ed Criscuolo [mailto:edward.l.criscu...@nasa.gov]
Sent: Monday, December 19
Yes, I can do my own blocks. It would be pretty trivial to do it
there. I just wanted to know if there was an easy way to do it
solely using GRC.
@(^.^)@ Ed
On 12/19/11 5:05 PM, Nowlan, Sean wrote:
If you're somewhat familiar with how to write/modify blocks, it probably
wouldn't be
I'm working on an application that will do full-duplex using an RFX2200
daughterboard in a USRP1.
The transmit frequency will be about 2.055 GHz, and the receive freq
will be about 2.255 GHz.
Up until now, we've been working with only the transmit or the receive
flowgraph separately. Now we're
The RFX (FLEX) series of transceiver daughtercards include an onboard
T/R switch to allow a half-duplex setup using the Tx/Rx connector
and a single antenna.
In GnuRadio 3.3.0, under GRC, the choices for the Transmit parameter
on a USRP Sink Block seem to be limited to Unconfigured,
Enabled, or
Has anyone built 3.5.1 release and UHD 3.3.2 on OSX 10.6 (Snow Leopard) yet?
@(^.^)@ Ed
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Tom,
I was just trying to install the GnuRadio 3.5.1 release tarball, and I
found two problems:
1. The tarball does not appear to contain the CMakeLists.txt file.
This forces the use of the autotools instead of cmake.
2. After successfully installing UHD release 3.3.2, the GnuRadio
One of my latest GnuRadio projects uses a custom source block.
The quick description of this block is that it takes a packet
off of the network stack, wraps it in HDLC/Frame-relay, and
streams the unpacked bits out of the block. The catch is that
when there is no network packet ready, the block
Years ago, I used one (on Windows) to capture the spectrum from our
spacecraft's first pass into a .wav file, and then used GnuRadio on a Linux box
to demodulate the file offline. We found the bandwidth to be pretty limiting
because the Doppler shift would walk our 150 kHz wide signal
On 1/31/12 5:41 PM, محمد روسلي wrote:
Hi,
I would like to ask what happen if there are many block of throttle
connected between a source and a sink in pure simulation? I notice the
GUI Interface (wxgui) is getting slow when 5 throttle block is connected
between a signal source and signal probe
On 2/10/12 4:14 AM, Marius Ciepluch wrote:
So if someone knows how I can implement a callback or a polling function
to make the device tune for real, but as fast as possible, that'd be
very helpful.
In the past, I've done external tuning via GRC with the following:
Create a variable block
I know this is a stupid question, but I've been bitten by this before:
Are you SURE you're cabled to the Tx/Rx connector and not Rx2?
@(^.^)@ Ed
On 2/10/12 4:30 PM, Reginald Cornwallice wrote:
Hello All,
I'm having an issue with the transmit power on N210 + WBX not being able
to reach the
On 2/15/12 11:31 AM, Jeff Brower wrote:
GNU Radio is owned by National Instruments .
!
You are confusing GnuRadio with Ettus Research.
GnuRadio is an open source SDR framework.
Ettus is the manufacturer of the USRP series of hardware
and the UHD driver libraries to
On 2/17/12 2:07 AM, guelord ingala wrote:
Hi,
I'm getting confused with the concept of Sampling rate to set the
UHD:USRP Source and other blocks from the gnuradio-companion. If I'm
still right, the sampling rate must be at least the double of the
operating frequency. But I can see some working
What's the current status of GR 3.6.1 on OSX 10.6 (Snow Leopard)?
Will it install? I've been chasing my tail on dependencies for
two days. At one point I got it to build, but almost all of the
tests failed with dynamic library problems. I've attempted
to track down all of the dependencies and
Broadcast FM has a channel bandwidth of 150 kHz, so a sampling rate of 200 or
256 ksps should work fine. Don't confuse the sampling rate of the zero-IF data
with the sampling rate of the front-end, which is 64 msps (USRP1) or 100 msps
(USRP2).
The UHD API tends to hide this. In the old classic
On 8/9/12 11:09 AM, pengyu zhang wrote:
Receiver's configuration code:
rx = usrp.source_c(0, dec_rate, fusb_block_size = 512, fusb_nblocks = 8)
The decimation rate determines the final sample rate.
For example:
Since the USRP1 digitizes at 64 Msamples/sec, a
I have an application that requires transmitting at 2287.5 MHz.
Can the GR3.6.1/UHD/USRP2/WBX combination tune to that freq?
I know it's above the published range for the WBX (2200 Mhz)
but these ranges are often rounded.
Assuming the WBX will/can get there (Matt?), is there any
limit checking
I'm starting up on another RD project using GnuRadio.
The project is a transponder, used by NASA for ranging.
It uses DSSS on both the uplink and the downlink. The
transponder has to be coherent, and it synchronizes the
PN epochs of the received uplink and the transmitted downlink.
This allows
In my current project, I'm using the MPSK Receiver Class to receive
a QPSK modulated signal. We have requirements to log the frequency
and phase offsets from the spec more-or-less continuously in order to
do doppler-related post-processing.
Is there any way to get the current frequency phase
On 11/19/12 10:11 AM, Tom Rondeau wrote:
used? Should be change the way gr_iif_filter takes in the taps, or
should we change how gr_filter_design produces them?
Thanks for the feedback!
Tom
I agree that changing the way gr_iir_filter takes in the taps could
be disruptive, unless backward
Has anyone been using Gnu Radio on a Raspberry Pi lately? (just got one for
Xmas :) ) Any special build procedures for 3.6.3?
@(^.^)@ Ed
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On 1/17/13 10:35 AM, Philip Balister wrote:
On 01/17/2013 08:57 AM, Ed Criscuolo wrote:
Has anyone been using Gnu Radio on a Raspberry Pi lately? (just got one for
Xmas :) ) Any special build procedures for 3.6.3?
Please remember the R-pi is an armv6 based processor with a vfp unit
Marcus, Phillip, Thomas, Aylons, Iain,
Thanks for all the good ARM info. Obviously ARM is not
my area of expertise.
As for the R-Pi, yes its a toy. I'm just casting about
for interesting things to do with it, and wondered if it,
combined with a B100 or a USRP1, might make up a low-power/
Mike,
I've been avidly following this thread, since I recently had to
upgrade (company policy) to OSX 10.8, and I wanted to get my
gnuradio install running again at the 3.6.3 release.
It looked like things had mostly settled down, so I made sure any
old files were uninstalled, and tried
the
I recently upgraded to a new MacBook Pro with OSX 10.6 and can't
get GnuRadio 3.2.2 to configure because it wants Boost =1.35 and
I have Boost 1.33. When I try to upgrade Boost using macports,
it fails with the following (long) error:
Error: Target org.macports.build returned: shell command cd
Michael Dickens wrote:
Hi Ed - The 3.2.2 release cannot easily be made to be fully working on
OSX 10.6, but the complexity depends mostly on whether your computer's
CPU is 32- or 64-bit.
It's a brand new MacBook Pro with 2.8 GHz Intel Core2 Duo, so as far as
I know it's 64-bit.
* If your
Ed Criscuolo wrote:
. But MacPorts has been the real problem so far.
I can't get the dependencies (specifically Boost =1.35) to install.
I found that problem with Boost came from zlib and bzip2. By
reinstalling these with the +universal variant specified
Boost 1.40 was able
Josh,
Is there some separate program to convert old-style GRC
flographs (ie - grc_0.69) to the new-style ones required by
the GRC included with GnuRadio 3.2.2? I tried to simply
use GRC to open the older flowgraph (which worked fine on
grc 0.69 and gnuradio 3.1.3) directly, but got hundreds
Michael Dickens wrote:
2) Move to the GIT master, and limit compilation to just 32-bit mode
-- and you should get full GNU Radio functionality (assuming you can
get all of the background dependencies installed, e.g., via MacPorts).
Michael,
I've decided to take this approach for now.
Marcel Maatkamp wrote:
I had the same error, but by upgrading port and cleaning gnuradio this
error went away:
% sudo port selfupdate
% sudo port upgrade outdated
% sudo port clean gnuradio
% sudo port install gnuradio
After that it somehow still tries to install wxPython and will halt
Michael Dickens wrote:
Thanks for all the feedback thus far! Can those of you on this thread
return back to me the following (as executed in a terminal,
individually):
gcc -v
machine
uname -a
% gcc -v
Using built-in specs.
Target: i686-apple-darwin10
Configured with:
I was wondering what the status was for the VRT work.
Are there any dates set or expected for being able to
use the USRP2 on Mac OSX?
@(^.^)@ Ed
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Did you ever make these changes to the portfile for wxgui?
@(^.^)@ Ed
Michael Dickens wrote:
Hi Ed - Thanks for the feedback, it's useful; I don't mind being
wrong! I'll have to set up my Mac to do multi-boot (10.5 and 10.6) in
order to further test this issue out. That said, the kernel
Is it possible to use a WBX daughtercard on a USRP1 with the
3.3 stable release of GnuRadio, or is it necessary to go to the
latest development code (or the UHD code)?
@(^.^)@ Ed
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On 10/27/10 1:23 PM, Marcus D. Leech wrote:
Looking at the flow-graph, it seems like the modulation bits are
running at the same rate as the carrier frequency, which won't work--not
even slightly.
Generally in AM/ASK, the modulation frequency is *much* lower than the
carrier frequency, my
gr_complex_to_mag will produce the envelope of an amplitude modulated carrier.
@(^.^)@ Ed
Sent from my iPod
On Oct 28, 2010, at 10:50 PM, songsong gee gee.songs...@gmail.com wrote:
Now I'm trying to build an ASK demodulator. I use GRC.
However, I REALLY REALLY couldn't find an envelope
On 10/29/10 10:42 AM, Rickard Nilsson wrote:
Hi list,
After reinstalling and upgrading the GNU Radio from version 3.2.2 to 3.3.0, on
two different platforms, I have lost some of the valuable GRC documentation
which was available earlier in the blocks. Many of the blocks now have much
less
On 10/29/10 12:29 PM, Josh Blum wrote:
Did you build and install the doxygen documentation?
I installed under OSX 10.6.4 using Michael Dickens' macports
packaging of 3.3.0
Look atprefix/etc/gnuradio/conf.d/grc.conf
Is there documentation in the directory specified by doc_dir?
No, there
On 10/29/10 7:55 PM, Michael Dickens wrote:
I think it's not an oversight; maybe it's a feature? If you installed GNU Radio via MacPorts'
gnuradio port (or gnuradio-*), you need to do sudo port install gnuradio
+docs to get the docs. I made them separate because not everyone wants them they
I just followed the build instructions for GnuRadio 3.3.0 on
Ubuntu 10.04 LTS. All the dependencies updated/installed without
trouble, and the
./configure
make
sudo make install
worked fine. However, trying to run gnuradio-compainion failed, and
produced a misleading suggestion to check the
I just tried to use a new RFX2200 daughterboard in a USRP1 with
the latest stable release GnuRadio 3.3.0, and it didn't recognize it.
Usrp_probe reported a Name of Unknown (0x002C).
What's the deal here? Do I need to go to the latest development
version to get it to recognize this card? If so,
Since the RFX2200 does not seem to be supported by GR 3.3.0, I switched
over to the latest git source and tried it. It seems to be broken
with respect to the RFX2200. Probing the USRP now detects the card's
name correctly (Flex 2200 Rx MIMO B), but still complains that it
has ... invalid EEPROM
On 12/9/10 4:07 PM, Jason Abele wrote:
Looks like the rfx2200 code for usrp1 is incomplete. I have attached
a patch that should apply rfx2200 support to any gnuradio tree=
3.3.0
Thanks Jason! You're a lifesaver! I've got a pending delivery
in the next week or so that depends on this. I'll
Something strange is going on with the list server.
Posts are showing up in the archives within a few hours, but I'm not
getting them in my inbox until almost a day later!
@(^.^)@ Ed
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On 12/10/10 12:24 PM, Jason Abele wrote:
On Thu, Dec 9, 2010 at 5:15 AM, Ed Criscuolo
edward.l.criscu...@nasa.gov wrote:
Since the RFX2200 does not seem to be supported by GR 3.3.0, I switched
over to the latest git source and tried it. It seems to be broken
with respect to the RFX2200
On 1/3/11 3:49 AM, Andrew Rich wrote:
3. I would like to be able to decode AX25 packet (ISS)
Check out the CGRAN repository. The GMSK Spacecraft Groundstation
Project ( https://cgran.org/wiki/GMSKSpacecraftGroundstation ) has
an HDLC decoder block in it. AX.25 is built on top of HDLC, so
Matt,
I'm considering the E100 for use with GnuRadio/UHD
aboard a small spacecraft, and I have a few of questions:
1. What's the power drain? Watt-hours are always at a
premium aboard a small spacecraft.
2. Are there any vacuum-sensitive components? For example,
electrolytic
On 1/21/11 4:19 AM, Martin Braun wrote:
Talking of which: Who actually *does* use GNU Radio? I can't see a whole
lot of active projects going on, not on this list or on CGRAN.
I'm currently implementing my third spacecraft groundstation using
GnuRadio. It's due to go into operation late this
On 1/31/11 11:51 AM, nyquist82 wrote:
I do not understand what you mean by proper bandwidth. And what are these
proper USRP2 `s bandwidth? Thanks anyway for your reply.
The USRP2 runs at 100 Msamples/sec. There is no integer decimation
factor that will yield exactly 8 Msamples/sec for an 8
Looks like you have your interpolator and your multiply blocks switched.
The way you have it, the L-R audio is interpolated up to a 200k
sample rate, and then multiplied with a 19khz subcarrier at
a 44.1k sample rate.
Do the multiply first, then interpolate the product.
Or alternately, simply
On 9/28/11 4:54 PM, Marcus D. Leech wrote:
On 28/09/2011 4:50 PM, Phelps Williams wrote:
I have a usrp and computer in a remote location without much network
bandwidth available to the system and I'm using it as a spectrum
analyzer. I'd like to run the fft on the remote system and then send
What frequency does the USRP1 want to see on its ext clk input?
10 MHz or 64 MHz?
@(^.^)@ Ed
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Have a look at the GMSK Spacecraft Groundstation Project
on CGRAN:
https://cgran.org/wiki/GMSKSpacecraftGroundstation
@(^.^)@ Ed
On 11/3/11 9:14 AM, ahmad wrote:
Hi all
I am new on working with GRC. I am researching on gmsk modulators.I could not
make a proper GRC model or example. anybody
On 11/8/11 9:29 AM, 弓长张 wrote:
I'm a starter in using the USRP, it's known that the bandwidth of USRP
is 8M beacause of the USB bandwidth ,my question is the 8M refers to the
Nquist Bandwith or the actual signal bandwidth?If it refers to the
Nquist Bandwith, it is mean that USRP can only
I have an odd question.
I've been requested to duplicate a system I built a couple of years ago
based on GnuRadio 3.3 and Ubuntu 10.04LTS. Unfortunately, the laptop
that was used is no longer made, and it's new equivalent uses an
ethernet chipset that does not not have drivers in 10.04LTS, but
Thanks Jonathan! That tidbit probably saved me an hour of
troubleshooting right there! :)
@(^.^)@ Ed
On 2/12/13 10:16 AM, Johnathan Corgan wrote:
On Sat, Feb 9, 2013 at 10:24 AM, Ed Criscuolo
edward.l.criscu...@nasa.gov mailto:edward.l.criscu...@nasa.gov wrote:
My question
Outstanding! Thanks for putting in the time to make this happen!
What version of gnuRadio was it built against?
@(^.^)@ Ed
On 11/20/13 4:05 PM, Achilleas Anastasopoulos wrote:
I have been working on a DSSS system for some time now.
You can find our work-in-progress here:
Irene,
I believe the problem is that you are trying to have two different
types of output streams. According to the documentation on
gr_io_signature, it looks like multiple output streams must
all be of the same type. Or at least of types that have the
same size.
In your code, you try to
Arrrgh! Apologies to all. I totally missed the all-important 2
at the end of Irene's gr_make_io_signature2 call. Please ignore my
previous post.
@(^.^)@ Ed
Ed Criscuolo wrote:
Irene,
I believe the problem is that you are trying to have two different
types of output streams. According
Murtuza wrote:
Hi Ed
Can I have a look at your Gold Code source block.
Thanks
Ali
The block makes use of the existing glfsr block.
Two of them are setup and XOR'ed. The tdrss
package containes a set of low level utilities,
including the 'xor' operation.
mir murtuza ali wrote:
hi all
i want to spread binary data read from a file using a PN sequence. The
PN sequence is generated by a LFSR. Is there any gnuradio block that can
help me do this. The gr.glfsr_source_b generates the sequence
continously. If there isn't any block that can help me
Ed Criscuolo wrote:
It basically works by stepping thru the output bits and
accumulating bit times. It replicates the same input bit
into each output bit until the accumulated time exceeds
an input bit time, at which point it steps to the next input
bit. Any remainder over one output bit time
Josh,
I'm trying to move from GRC 0.69 to 0.70. 0.69 works fine,
but 0.70 gives me a bus error when I start it:
[eds-mac:gnu_radio/grc_0.70/src] edwardc% ./Editor.py
Removing empty category Custom...
Bus error
[eds-mac:gnu_radio/grc_0.70/src] edwardc%
Running under gdb gives:
Program
Has anybody had any luck using the Tun/Tap device in GRC?
I've tried it with GRC 0.70 and 0.69 under Fedora 8, and
GRC 0.69 under Mac OSX and had no luck, even when running
everything as root.
Under OSX 10.4, I installed Mattias Nissler's tun/tap driver
( http://tuntaposx.sourceforge.net/ )
Josh Blum wrote:
I pasted the relevant code below so we can reference its mystery hex
number.
The tun tap block in grc takes code from the tun tap example to open a
tun tap file descriptor. The file descriptor is fed into a file
descriptor source and sink. From the outside of the tun tap
Josh Blum wrote:
Looks like it should. Yet, when I run it in linux, the tun0 network
device gets created without the IP address, but manually running
the same ifconfig command works. At least as far as asigning the
address.
GRC expects to have root access in this case, you may be running
I'm building a set of blocks to implement the HDLC link-layer
functions for a spacecraft communication system.
These blocks deal with IP packets from/to the stack on one side,
and a bitstream to/from the modulator/demodulator on the other side.
The receive block is already done and working. It
Eric Blossom wrote:
Ed,
The problem is that you need to know when the output is about to
underrun, and only then insert flags.
Is there any external reference clock or other way to tell when the
external stream needs data? In general, GR has no tie to an external
timebase, except
Eric Blossom wrote:
On Thu, Oct 23, 2008 at 04:56:04PM -0400, Ed Criscuolo wrote:
At this point, I think I'll embed all the packet reading AND
hdlc processing into a single source block with no flow
inputs. This way the block can check for packets on the TUN
device, read them, bitstuff
Is there any preprocessor define (or defines) that can be used
when compiling C++ GnuRadio code to differentiate between
different OSs? I've looked through config.h but didn't see
anything obvious. I need to compile two different pieces
of code for OSX vs LINUX.
@(^.^)@ Ed
Eric Blossom wrote:
On Mon, Nov 03, 2008 at 02:16:10PM -0500, Ed Criscuolo wrote:
Is there any preprocessor define (or defines) that can be used
when compiling C++ GnuRadio code to differentiate between
different OSs? I've looked through config.h but didn't see
anything obvious. I need
Michael Dickens wrote:
The general way to do this is to create an m4 file with a 'case' in it
based on the $host_os, e.g. (as taken and expanded from
grc_gr_audio_osx.m4; the case strings may or not be entirely correct,
and are used as examples):
-
passed=yes
[set some other
The project I'm working on (an SDR for a spacecraft
communication groundstation) needs to transmit VHF at
around 145 MHz. There seems to be a distinct gap
in the transmit capabilities of the USRP daughterboards
between 32 MHz and 400 MHz.
I'm looking for suggestions as to how to best accomplish
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