Hi, You may check in the docs folder in the GitHub page under usage-manual, Handling flowgraphs.txt and types of blocks.txt files until someone who is expert answer your questions. Hope that helps. Thanks.. Shakti
On Sun, Aug 20, 2023, 04:54 tom sutherland <alphatoz...@yahoo.com> wrote: > I've gone through the Python tutorial but have some questions. If I use > the "input" to the block, how many samples are processed each time the > Python code is called? Does it pass a byte, float, complex, vector, etc... > on at a time? Does it work on each sample or can you send it an array? Is > the Python in/out synchronized with the data stream? > Thanks...Tom > > On Friday, August 18, 2023 at 11:03:02 AM CDT, > discuss-gnuradio-requ...@gnu.org <discuss-gnuradio-requ...@gnu.org> > wrote: > > > Send Discuss-gnuradio mailing list submissions to > discuss-gnuradio@gnu.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > or, via email, send a message with subject or body 'help' to > discuss-gnuradio-requ...@gnu.org > > You can reach the person managing the list at > discuss-gnuradio-ow...@gnu.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Discuss-gnuradio digest..." > > > Today's Topics: > > 1. [GRCon'23] Keynotes, Workshops, Sponsors: It's all coming > together! (Marcus Müller) > 2. Re: Using a signal as a parameter in a block? (Marcus Müller) > 3. Re: Discuss-gnuradio Digest, Vol 250, Issue 15 (Sowji Srinithi) > 4. LookupError: KeyError: No devices found (was: Re: > Discuss-gnuradio Digest, Vol 250, Issue 15) (Marcus Müller) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 17 Aug 2023 18:04:52 +0200 > From: Marcus Müller <mmuel...@gnuradio.org> > To: Gnuradio Mailing List <discuss-gnuradio@gnu.org> > Cc: srsran-us...@lists.srsran.com > Subject: [GRCon'23] Keynotes, Workshops, Sponsors: It's all coming > together! > Message-ID: <3cc7fed1-4a23-d428-a16c-4670e01d3...@gnuradio.org> > Content-Type: text/plain; charset=UTF-8; format=flowed > > Dear Community, > > GNU Radio Conference 2023 is coming closer! (It takes place starting > Sep. 5 in Tempe, Arizona, USA. Tickets happen to be $100 cheaper until > 2023-08-18 [0].) > > == Keynotes == > > The Conference Organizers are quite happy to see an excellent list of > Keynote speakers[1] come together for the four conference days: > > With Lindy Elkins-Tanton, we have been able to secure the NASA Principal > Investigator for the Psyche Mission, and an all-around impressive > scientist and research leader on the formation of rocky planets. If > being elected into the National Academy of Sciences is not enough > credit: there's an asteroid named after her. > On the technical and historical side, I'm personally looking forward to > seeing Eric Blossom again: he, as the first head of architecture, has > been formative to the things that make GNU Radio what it is. Currently, > he's working on high-speed satellite radios. > Don't forget that SDR involves, famously, not only software, but also > radio. Constantine Balanis' contributions to the field of radio > technology are not limited to his authorship of the standard textbook on > antennas – he's been at the forefront of EM simulation and RF channel > theory and thus set many cornerstones for wireless communications and > sensing applications everywhere. > Of course, if we invite GNU Radio's history, we should also be inviting > someone working on the future of GNU Radio: That'd be Ralph Steinhagen, > head developer for systems integration at FAIR, one of the largest and > technically most advanced particle accelerators, who, together with his > team, is putting in all the work to bring a shared vision of GNU Radio > 4.0 to life. > > == Workshops == > > But the value of a conference is not found exclusively in the > higher-profile talks, but also in the ways that it enables people to > actually have a closer look at things, together. Workshops [2] have been > a staple of GRCon's popularity for years, and this year is no exception > with a total count of 10 workshops, covering topics from basic DSP, over > GNU Radio use, transceiver design, embedded Linux-based SDR development, > and FPGA usage on SDR devices, to FOSS 5G network setup with srsRAN. > > == Sponsors == > > As you might guess, organizing all this takes effort – and executing > takes a lot of funds. Hence, we're very glad we've found sponsors [3] > for this year's GRCon. Next to a few industry-standard names, it's > especially nice to see breakthrough startups and research organizations > take up the chance to present themselves to the GNU Radio audience. You > can, when buying tickets [0], directly choose a Patron Ticket, which > gives you a cheap opportunity to place your logo on the GRCon website; > if that's what you want to do, or if you care for other sponsorship > packages, don't hesitate to reach out to spon...@gnuradio.org. > > So, for now: I'm looking forward to seeing you there! > > -- Marcus > > [0] https://tickets.gnuradio.org/ > [1] https://events.gnuradio.org/event/21/page/111-keynote-speakers > [2] > > https://events.gnuradio.org/event/21/contributions/?config=9e736ba3-8af2-4446-b8ba-bf634ad0ff33 > [3] https://events.gnuradio.org/event/21/page/94-our-sponsors > > > > > ------------------------------ > > Message: 2 > Date: Thu, 17 Aug 2023 20:08:51 +0200 > From: Marcus Müller <mmuel...@gnuradio.org> > To: discuss-gnuradio@gnu.org > Subject: Re: Using a signal as a parameter in a block? > Message-ID: <41d0ac35-16ce-dff0-5eb7-7d0b4202c...@gnuradio.org> > Content-Type: text/plain; charset=UTF-8; format=flowed > > Hi Tom, > > You are assuming the "delay" input of the Delay block was > sample-synchronous – it's not! > Messages are asynchronous to samples by design. Repeating the same message > hence doesn't > do what you want: > What you're trying to do, keep the delay constant for 1023 samples, then > change it, keep > it constant… but that would require that the delay block "waits" for a new > message for > every sample it processes. It doesn't (and it can't). > > I think in your situation, learning how to write a Python (or C++, if > that's easier for > you) block to do in one place what you want to happen here would be the > only solution – > and not too hard. > > Best regards, > Marcus > > On 17.08.23 14:59, tom sutherland wrote: > > I want to use the output value of a signal generator as the delay value > of a delay block. > > Is there a way to pass the output of a signal generator(saw tooth) to > the delay block? I > > have attached an initial grc file and a picture of what I want to do. > Any help would be > > appreciated. > > Thanks...Tom > > PS Do you know if I need to sign up for any workshops, etc.. at the > GNURadio Conference > > next month or do I just show up and take a seat? I've already registered. > > > > Inline image > > > > > > > > ------------------------------ > > Message: 3 > Date: Fri, 18 Aug 2023 13:41:16 +0530 > From: Sowji Srinithi <sowjisrini...@gmail.com> > To: discuss-gnuradio@gnu.org > Subject: Re: Discuss-gnuradio Digest, Vol 250, Issue 15 > Message-ID: > <cacqfbd8kfj2dptehwrlg-yec+b3uavdg-tmryyqpmyq6rj+...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Qt GUI: Could not restore geometry: restoreGeometry(self, geometry: > Union[QByteArray, bytes, bytearray]): argument 1 has unexpected type > 'NoneType' [INFO] [UHD] linux; GNU C++ version 12.3.0; Boost_107400; > UHD_4.4.0.0+ds1-4 Traceback (most recent call last): File > "/home/sowjanya/Downloads/fm_example.py", line 238, in <module> main() File > "/home/sowjanya/Downloads/fm_example.py", line 216, in main tb = > top_block_cls() ^^^^^^^^^^^^^^^ File > "/home/sowjanya/Downloads/fm_example.py", line 84, in __init__ > self.uhd_usrp_source_0 = uhd.usrp_source( ^^^^^^^^^^^^^^^^ RuntimeError: > LookupError: KeyError: No devices found for -----> Empty Device Address how > to fix this error > > How to fix the above error > > On Thu, 17 Aug 2023 at 21:37, <discuss-gnuradio-requ...@gnu.org> wrote: > > > Send Discuss-gnuradio mailing list submissions to > > discuss-gnuradio@gnu.org > > > > To subscribe or unsubscribe via the World Wide Web, visit > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > or, via email, send a message with subject or body 'help' to > > discuss-gnuradio-requ...@gnu.org > > > > You can reach the person managing the list at > > discuss-gnuradio-ow...@gnu.org > > > > When replying, please edit your Subject line so it is more specific > > than "Re: Contents of Discuss-gnuradio digest..." > > > > > > Today's Topics: > > > > 1. Using a signal as a parameter in a block? (tom sutherland) > > > > > > ---------------------------------------------------------------------- > > > > Message: 1 > > Date: Thu, 17 Aug 2023 12:59:58 +0000 (UTC) > > From: tom sutherland <alphatoz...@yahoo.com> > > To: "discuss-gnuradio@gnu.org" <discuss-gnuradio@gnu.org> > > Subject: Using a signal as a parameter in a block? > > Message-ID: <661605185.819399.1692277198...@mail.yahoo.com> > > Content-Type: text/plain; charset="utf-8" > > > > I want to use the output value of a signal generator as the delay value > of > > a delay block. Is there a way to pass the output of a signal > generator(saw > > tooth) to the delay block? I have attached an initial grc file and a > > picture of what I want to do. Any help would be > appreciated.Thanks...TomPS > > Do you know if I need to sign up for any workshops, etc.. at the GNURadio > > Conference next month or do I just show up and take a seat? I've already > > registered. > > > > > > > > > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: < > > > https://lists.gnu.org/archive/html/discuss-gnuradio/attachments/20230817/353462d6/attachment.htm > > > > > -------------- next part -------------- > > A non-text attachment was scrubbed... > > Name: 1692277050668blob.jpg > > Type: image/png > > Size: 41672 bytes > > Desc: not available > > URL: < > > > https://lists.gnu.org/archive/html/discuss-gnuradio/attachments/20230817/353462d6/attachment.png > > > > > -------------- next part -------------- > > A non-text attachment was scrubbed... > > Name: rampAsDelayInput.grc > > Type: application/octet-stream > > Size: 4072 bytes > > Desc: not available > > URL: < > > > https://lists.gnu.org/archive/html/discuss-gnuradio/attachments/20230817/353462d6/attachment.obj > > > > > -------------- next part -------------- > > A non-text attachment was scrubbed... > > Name: RampAsDelayInput.png > > Type: image/png > > Size: 30385 bytes > > Desc: not available > > URL: < > > > https://lists.gnu.org/archive/html/discuss-gnuradio/attachments/20230817/353462d6/attachment-0001.png > > > > > > > ------------------------------ > > > > Subject: Digest Footer > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > ------------------------------ > > > > End of Discuss-gnuradio Digest, Vol 250, Issue 15 > > ************************************************* > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > https://lists.gnu.org/archive/html/discuss-gnuradio/attachments/20230818/70cc2c07/attachment.htm > > > > ------------------------------ > > Message: 4 > Date: Fri, 18 Aug 2023 10:35:09 +0200 > From: Marcus Müller <marcus.muel...@ettus.com> > To: discuss-gnuradio@gnu.org > Subject: LookupError: KeyError: No devices found (was: Re: > Discuss-gnuradio Digest, Vol 250, Issue 15) > Message-ID: <4b8dc553-f663-4d9b-fdbf-beca6b3ee...@ettus.com> > Content-Type: text/plain; charset="utf-8"; Format="flowed" > > Hi Sowji, > > according to the text you've replied to: > > > When replying, please edit your Subject line so it is more specific > > than "Re: Contents of Discuss-gnuradio digest..." > > I changed the subject line to actually describe the contents of your > email. Please get in > the habit of doing that :) > > Anyways, as you notice, this is an error related to UHD not finding any > USRP devices. > Since we don't know which device you have, we can't help you with that. > But to expedite a > solution: Guides to this are found in dozens of corners on the internet, > for example > > https://stackoverflow.com/questions/33304828/when-trying-to-use-my-usrp-in-gnu-radio-i-get-a-no-devices-found-for > > > Best, > > Marcus > > > On 18.08.23 10:11, Sowji Srinithi wrote: > > Qt GUI: Could not restore geometry: restoreGeometry(self, geometry: > Union[QByteArray, > > bytes, bytearray]): argument 1 has unexpected type 'NoneType' [INFO] > [UHD] linux; GNU > > C++ version 12.3.0; Boost_107400; UHD_4.4.0.0+ds1-4 Traceback (most > recent call last): > > File "/home/sowjanya/Downloads/fm_example.py", line 238, in <module> > main() File > > "/home/sowjanya/Downloads/fm_example.py", line 216, in main tb = > top_block_cls() > > ^^^^^^^^^^^^^^^ File "/home/sowjanya/Downloads/fm_example.py", line 84, > in __init__ > > self.uhd_usrp_source_0 = uhd.usrp_source( ^^^^^^^^^^^^^^^^ RuntimeError: > LookupError: > > KeyError: No devices found for -----> Empty Device Address how to fix > this error > > > > How to fix the above error > > > > On Thu, 17 Aug 2023 at 21:37, <discuss-gnuradio-requ...@gnu.org> wrote: > > > > Send Discuss-gnuradio mailing list submissions to > > discuss-gnuradio@gnu.org > > > > To subscribe or unsubscribe via the World Wide Web, visit > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > or, via email, send a message with subject or body 'help' to > > discuss-gnuradio-requ...@gnu.org > > > > You can reach the person managing the list at > > discuss-gnuradio-ow...@gnu.org > > > > When replying, please edit your Subject line so it is more specific > > than "Re: Contents of Discuss-gnuradio digest..." > > > > > > Today's Topics: > > > > 1. Using a signal as a parameter in a block? (tom sutherland) > > > > > > ---------------------------------------------------------------------- > > > > Message: 1 > > Date: Thu, 17 Aug 2023 12:59:58 +0000 (UTC) > > From: tom sutherland <alphatoz...@yahoo.com> > > To: "discuss-gnuradio@gnu.org" <discuss-gnuradio@gnu.org> > > Subject: Using a signal as a parameter in a block? > > Message-ID: <661605185.819399.1692277198...@mail.yahoo.com> > > Content-Type: text/plain; charset="utf-8" > > > > I want to use the output value of a signal generator as the delay > value of a delay > > block. Is there a way to pass the output of a signal generator(saw > tooth) to the > > delay block? I have attached an initial grc file and a picture of > what I want to do. > > Any help would be appreciated.Thanks...TomPS Do you know if I need to > sign up for > > any workshops, etc.. at the GNURadio Conference next month or do I > just show up and > > take a seat? I've already registered. > > > > > > > > > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: > > < > https://lists.gnu.org/archive/html/discuss-gnuradio/attachments/20230817/353462d6/attachment.htm > > > > -------------- next part -------------- > > A non-text attachment was scrubbed... > > Name: 1692277050668blob.jpg > > Type: image/png > > Size: 41672 bytes > > Desc: not available > > URL: > > < > https://lists.gnu.org/archive/html/discuss-gnuradio/attachments/20230817/353462d6/attachment.png > > > > -------------- next part -------------- > > A non-text attachment was scrubbed... > > Name: rampAsDelayInput.grc > > Type: application/octet-stream > > Size: 4072 bytes > > Desc: not available > > URL: > > < > https://lists.gnu.org/archive/html/discuss-gnuradio/attachments/20230817/353462d6/attachment.obj > > > > -------------- next part -------------- > > A non-text attachment was scrubbed... > > Name: RampAsDelayInput.png > > Type: image/png > > Size: 30385 bytes > > Desc: not available > > URL: > > < > https://lists.gnu.org/archive/html/discuss-gnuradio/attachments/20230817/353462d6/attachment-0001.png > > > > > > ------------------------------ > > > > Subject: Digest Footer > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > ------------------------------ > > > > End of Discuss-gnuradio Digest, Vol 250, Issue 15 > > ************************************************* > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > https://lists.gnu.org/archive/html/discuss-gnuradio/attachments/20230818/b6b52e2b/attachment.htm > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > ------------------------------ > > End of Discuss-gnuradio Digest, Vol 250, Issue 16 > ************************************************* >
