Re: [Discuss-gnuradio] Help needed with message ports [success]

Hi Volker - You're welcome & so glad that we got the issue figured out! Which reminds me that I never put together a PR for the changes that would give programmers a clue that a hier2 block isn't meant to do actual "work". I'll add that to my queue & try to get it in before GRCon ... Cheers! - M

Re: [Discuss-gnuradio] Help needed with message ports [success]

Just to report the solution, as it me be usefull for others. My block was an hier2 block. Hier2 blocks can't handle messages directly, they only can serve as a proxy. So I added a gr::block with no inputs and outputs ( yes, this is possible, I did not know before ) that could handle the messa

Re: [Discuss-gnuradio] Help needed with message ports

On Fri, Jul 27, 2018, at 6:23 AM, Müller, Marcus (CEL) wrote: > Awesome! Folks, this is the way I always hoped the community works. > Cheers to you! LOL thanks but maybe premature?! This issue is somewhat more complicated than I thought, mostly because I'm still learning how to actually use a c+

Re: [Discuss-gnuradio] Help needed with message ports

Awesome! Folks, this is the way I always hoped the community works. Cheers to you! On Thu, 2018-07-26 at 16:36 -0400, Michael Dickens wrote: > A quick followup on progress on this query: > > The issue is in lib/flowgraph.cc, where message connection edges are not > being used when counting conne

Re: [Discuss-gnuradio] Help needed with message ports

A quick followup on progress on this query: The issue is in lib/flowgraph.cc, where message connection edges are not being used when counting connections (just stream connection edges). So, the flattened flowgraph shows 1 connection (the stream one going out), but no connection is found (becaus

Re: [Discuss-gnuradio] Help needed with message ports

Hi Volker - OK thanks for the update. After rechecking my OOT example, I agree that this issue requires inheritance from a hier2_block class. Maybe that will help track down the issue... ? I know that the code for doing connections is pretty gnarly, so who knows? Anyway, worth poking at ... and

Re: [Discuss-gnuradio] Help needed with message ports

Hi Michael, thank you for your reply. Yes your clarification is correct. The block I'm trying is of type hier2_block. Meanwhile I found an older post https://lists.gnu.org/archive/html/discuss-gnuradio/2015-10/msg8.html describing the same problem. But the gnuradio code has been modified

Re: [Discuss-gnuradio] Help needed with message ports

Hi Volker - Just to clarify: You've added an -optional- input async message port to a block that currently does just streaming. If you -do not- try to connect to this new port, then everything works as desired & as before. If you -do- try to connect to the port then you get the runtime error "i

[Discuss-gnuradio] Help needed with message ports

Hi, I'm trying to add an message port to my  working oot module fcdproplus to be able to control the frequency by an message from a qtgui sink. I used the analog signal source as guide and implemented a message sink in the grc description, registered the in port, and defined  a handler funct

Re: [Discuss-gnuradio] Help needed to install GR-GSM package

On 02/20/2018 08:34 AM, Shrishailayya M Hiremath wrote: > package libosmocore: > Unable to fetch recipe libosmocore > PyBOMBS.install_manager - ERROR - Error installing package libosmocore. > Aborting. This may be a firewall issue. -- M ___ Discuss-g

Re: [Discuss-gnuradio] Help needed regarding implementing spring mass system in GRC

Hi Afaq - Actually one could replicate this simulation in some capacity using async messages -- for all blocks, or just for the feedback portion. Async messages have no restriction on feedback as does streaming data -- see, e.g., the OFDM header/payload demux block in gr- digital & the related OFDM

Re: [Discuss-gnuradio] Help needed regarding implementing spring mass system in GRC

Hey Afaq, Unfortunately, GNURadio doesn't allow for signal feedback the way Simulink does. You can do feedback *within* a block, but that probably defeats the flexibility you were seeking? - Dan On Mon, Dec 4, 2017 at 9:33 AM Afaq Ahmed wrote: > Hello, > I want to implement spring mass system

[Discuss-gnuradio] Help needed regarding implementing spring mass system in GRC

Hello, I want to implement spring mass system with PID controller of example mentioned in following link [ http://ctms.engin.umich.edu/CTMS/index.php?example=Introduction§ion=ControlPID ] I want to create a flow graph exactly as given in the figure "Spring_mass_simulink" . Can you please help me

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

Dear Matt, > - If I set the generator at 50% modulation depth and I simply plot the > source input, I get this result , which > is different from the graph from Wikipedia Looks like clipping on either the TX or RX side. Reduce the output amplitude of the signal

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

I've been doing some tests, and something strange is happening: - If I set the generator at 50% modulation depth and I simply plot the source input, I get this result , which is different from the graph from Wikipedia

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

Wow! Thanks for taking the time to put this together. I'll try following those steps and let you know how it goes. Thanks again! -- View this message in context: http://gnuradio.4.n7.nabble.com/Help-needed-to-obtain-AM-Depth-of-Modulation-tp63826p63839.html Sent from the GnuRadio mailing list

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

You are totally right. I need it to be RF input independent, so I'll try following your advice. Thanks a lot! -- View this message in context: http://gnuradio.4.n7.nabble.com/Help-needed-to-obtain-AM-Depth-of-Modulation-tp63826p63838.html Sent from the GnuRadio mailing list archive at Nabble.co

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

I would start with source -> low pass filter(complex) - rational-resampler(complex) -> am demod -> number sink(float). I have never used the AM Demod block and I have never calculated the Modulation Index for AM. But it does appear you have a plumbing problem. I would start with changing the

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

On Wed, May 10, 2017 at 3:31 AM, Matt Cooper wrote: > Hi guys! > > I am trying to calculate the Depth of Modulation > of > an AM signal using GNU Radio, but I just can't make it work. > ... > - In GNU Radio, I'm using this

[Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

Hi guys! I am trying to calculate the Depth of Modulation of an AM signal using GNU Radio, but I just can't make it work. To test, I am using a Rode & Schwarz SMB100M signal generator connected to a USB SDR receiver

Re: [Discuss-gnuradio] Help needed

t; > > > *From:* discuss-gnuradio-bounces+alan.r.hill=gmail@gnu.org [mailto: > discuss-gnuradio-bounces+alan.r.hill=gmail@gnu.org] *On Behalf Of *Marcus > Müller > *Sent:* Wednesday, February 11, 2015 10:20 AM > *To:* discuss-gnuradio@gnu.org > *Subject:* Re: [D

Re: [Discuss-gnuradio] Help needed

to:discuss-gnuradio-bounces+alan.r.hill=gmail@gnu.org] ON BEHALF OF > Marcus Müller > SENT: Wednesday, February 11, 2015 10:20 AM > TO: discuss-gnuradio@gnu.org > SUBJECT: Re: [Discuss-gnuradio] Help needed > > Hi Alan, > > my first guess here would be that you

Re: [Discuss-gnuradio] Help needed

scuss-gnuradio-bounces+alan.r.hill=gmail@gnu.org] On Behalf Of Marcus Müller Sent: Wednesday, February 11, 2015 10:20 AM To: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] Help needed Hi Alan, my first guess here would be that you're using WX blocks and your "options&q

Re: [Discuss-gnuradio] Help needed

Hi Alan, my first guess here would be that you're using WX blocks and your "options" block is set to QT or console only (or maybe QT usage with WX option). If that is not it, can you paste the full output? Greetings, Marcus On 02/11/2015 07:02 PM, Silverfox wrote: > > I have been using gnurad-c

[Discuss-gnuradio] Help needed

I have been using gnurad-companion for some time now but for the last few months I have been getting errors that prevent use. My system is an up to date Mint OS. The version of the application is 3.7.6.1. I am experiencing errors that according to internet searches appear every now and then for

[Discuss-gnuradio] Help needed with hacking through SWIG / Python / custom block

Hi all, I'm trying a sort of a 'hack', but it doesn't work so far. What I want to do is to add a method to the class in my custom block, and make this method available in Python (the top_block.py). Without knowledge of SWIG I just tried the following things (where ZZZ is the name of my block):

RE: [Discuss-gnuradio] Help needed to understand scopesink2

Thanks to Alex for pointing out a mistake in the code snippet, it should read: self.interface_rate = 1e6 # i.e. 1 MS/s -- Roke Manor Research Ltd, Romsey, Hampshire, SO51 0ZN, United Kingdom A Siemens company Registered in England & Wales at: Siemens plc, Faraday House, Sir William Siemens Squa

Re: [Discuss-gnuradio] Help needed to understand scopesink2

On Fri, Sep 3, 2010 at 5:07 PM, Suleja, Lukasz wrote: > I am using the following code snippet to view a 100kHz sinewave on a virtual > oscilloscope: > > self.interface_rate = 1e9 > self.src = gr.sig_source_c(self.interface_rate, gr.GR_SIN_WAVE, 1e3, 1) > self.scope = scopesink2.scope_sink_c(panel,

[Discuss-gnuradio] Help needed to understand scopesink2

> I am using the following code snippet to view a 100kHz sinewave on a > virtual oscilloscope: > > self.interface_rate = 1e9 > self.src = gr.sig_source_c(self.interface_rate, gr.GR_SIN_WAVE, 1e3, > 1) > self.scope = scopesink2.scope_sink_c(panel, > sample_rate=self.interface_rate) > self.connect(s

Re: [Discuss-gnuradio] help needed on running gr_plot_XXX.py

gr_plot_xxx.py seams to need a lot of dependencies that is not stated in the gnu radio installation note such as mathplotlib, SciPy and others.can any one please help me list all the dependencies that required for the gr_plot_xxx? -- View this message in context: http://www.nabble.com/help-nee

[Discuss-gnuradio] help needed on running gr_plot_XXX.py

good day, i try to run gr_plot_ofdm.py in ofdm example but unfortunately it does not success. i am using fedora 9.. at first it tell me that i dosen't have the mathplotlib.. so i try to install the mathplotlib.. since mathplotlib required numpy v1.1 and higher (yum install in fedora 9 can upd

[Discuss-gnuradio] Help needed to transmit text that werent encoded in program

Hi, I've been tasked to work on gnuradio and usrp recently and below are some of the things that i need to implement. I have got 2 usrps over here and i needed to use one as a transmitter and the other as a receiver. For the transmitter, i need to use the program to open a new window where

Re: [Discuss-gnuradio] Help Needed: ValueError: itemsize mismatch: audio_alsa_source(1):0 using 4, flex_demod(2):0 using 8

On Thu, Apr 10, 2008 at 6:07 PM, Darryl Ross <[EMAIL PROTECTED]> wrote: > >slicer = pager_swig.slicer_fb(5e-6) The slicer block is expecting a floating point value from -3.0 to 3.0. Normally, this is the audio from an FM demodulator block that has the deviation set so the output is in th

Re: [Discuss-gnuradio] Help Needed: ValueError: itemsize mismatch: audio_alsa_source(1):0 using 4, flex_demod(2):0 using 8

Hi Jonathon, Johnathan Corgan wrote: On Thu, Apr 3, 2008 at 10:51 PM, Darryl Ross <[EMAIL PROTECTED]> wrote: I'm having a problem trying to use the flex_demod() method of gnuradio.pager: The FLEX demodulator/decoder is designed to operate on a stream of complex baseband samples received fr

Re: [Discuss-gnuradio] Help Needed: ValueError: itemsize mismatch: audio_alsa_source(1):0 using 4, flex_demod(2):0 using 8

On Thu, Apr 3, 2008 at 10:51 PM, Darryl Ross <[EMAIL PROTECTED]> wrote: > I'm having a problem trying to use the flex_demod() method of > gnuradio.pager: The FLEX demodulator/decoder is designed to operate on a stream of complex baseband samples received from the USRP; it was not designed to wo

Re: [Discuss-gnuradio] Help Needed: ValueError: itemsize mismatch: audio_alsa_source(1):0 using 4, flex_demod(2):0 using 8

On Fri, Apr 4, 2008 at 8:28 AM, Darryl Ross <[EMAIL PROTECTED]> wrote: > Hi Tim, > > Thanks for the reply. > > Tim Meehan wrote: > > > On Fri, Apr 4, 2008 at 12:51 AM, Darryl Ross <[EMAIL PROTECTED]> wrote: > >I'm guessing that I need to process (resample?) the signal from the > >sound car

Re: [Discuss-gnuradio] Help Needed: ValueError: itemsize mismatch: audio_alsa_source(1):0 using 4, flex_demod(2):0 using 8

Hi Tim, Thanks for the reply. Tim Meehan wrote: On Fri, Apr 4, 2008 at 12:51 AM, Darryl Ross <[EMAIL PROTECTED]> wrote: I'm guessing that I need to process (resample?) the signal from the sound card before passing it to the flex decoder, but I'm not sure what that processing would b

Re: [Discuss-gnuradio] Help Needed: ValueError: itemsize mismatch: audio_alsa_source(1):0 using 4, flex_demod(2):0 using 8

On Fri, Apr 4, 2008 at 12:51 AM, Darryl Ross <[EMAIL PROTECTED]> wrote: > (Apologies is this is a duplicate, I think I sent the first one before my > subscription activated) > > > Hi All, > > I'm having a problem trying to use the flex_demod() method of > gnuradio.pager: > > [EMAIL PROTECTED] bin

[Discuss-gnuradio] Help Needed: ValueError: itemsize mismatch: audio_alsa_source(1):0 using 4, flex_demod(2):0 using 8

(Apologies is this is a duplicate, I think I sent the first one before my subscription activated) Hi All, I'm having a problem trying to use the flex_demod() method of gnuradio.pager: [EMAIL PROTECTED] bin]# ./alsa_flex.py gr_fir_fff: using SSE Traceback (most recent call last): File "./

Re: [Discuss-gnuradio] Help needed with FPGA

Thank you Brian and Mande. >> Something you may want to try to do is focus on the TX side of things. >> >> RX is generally the harder part of radio communications, and probably >> wouldn't work out too well inside of an FPGA that is already pretty >> full. TX on the other hand is all just simple

Re: [Discuss-gnuradio] Help needed with FPGA

Something you may want to try to do is focus on the TX side of things. RX is generally the harder part of radio communications, and probably wouldn't work out too well inside of an FPGA that is already pretty full. TX on the other hand is all just simple permutations, look up tables, and maybe so

Re: [Discuss-gnuradio] Help needed with FPGA

Hi, Thank you Lee for your response. I am not sure about the current status of OFDM implementation. I figured out from the mailing list that it is still in testing phase. Would it be a good idea to port some of the OFDM implementation onto the FPGA.? I am just starting off with USRP and would g

Re: [Discuss-gnuradio] Help needed with FPGA

There's a header file: GNU_Radio\usrp\fpga\toplevel\usrp_std\config.vh That header controls the build configuration and is now functional. Modify it to use the file: GNU_Radio\usrp\fpga\toplevel\include\common_config_1rxhb_1tx.vh This is how: // Uncomment this for 1 rx channel (w/ halfband) &

[Discuss-gnuradio] Help needed with FPGA

Hi, I am trying to add some functionalities to the existing FPGA in USRP. I went through the mailing list and figured out that the current Verilog/VHDL code implementation occupies 90% of FPGA's resources. However, there were some mails that pointed that reducing some reveiver functionalities cou

Re: [Discuss-gnuradio] help needed regarding correct hardware choice

Parth Pathak wrote: > I am thinking of doing something with USRP and GNUradio especially > in 802.11 domain or something in Bluetooth. If you people can please help me > in > buying the hardware first. Make sure to re-read carefully Tom Rondeau's email of 5 December 2006 about the feasibility o

[Discuss-gnuradio] help needed regarding correct hardware choice

Hi all, I have been constantly watching and understanding the GNUradio group activity from last 4 months now. As a student (and a newbie for GNUradio), I feel now I am in position to start some practical work on it. I am thinking of doing something with USRP and GNUradio especially i

[Discuss-gnuradio] help needed to improve scripting

hi Everybody, I'm gonna ask you an unusual question. I've started learning about GNURadio about 3 months ago and, so far, I've written my first piece of code. It is just a flow-graph implemented in Python using GNURadio community provided blocks, the application is meant to allow the user to sele

[Discuss-gnuradio] Help needed for FM reception using USRP Basic Rx

I am trying get the FM reception working using the USRP board with a Basic Rx daughter board. I am able to receive most AM stations pretty well using "am_rcv.py", but when I run the "wfm_rcv_gui.py" all I am able to hear from the speakers is constant noise in varying intensities. Reading some po