RE: [EXTERNAL] Re: Changing the frequency of signal source at runtime

[Pratik Bhogale]

Got it, thanks. I’ll try this solution. Also thanks for the SoapySDR suggestion.   From: Jeff Long Sent: 14 July 2021 14:04 To: discuss-gnuradio@gnu.org Subject: Re: [EXTERNAL] Re: Changing the frequency of signal source at runtime   Right, you can use sdrplay this way in GNU Radio 3.9:   https://wiki.gnuradio.org/index.php/Soapy   3.7 is old and wxwidgets is not supported in recent versions. Recommend you upgrade if possible.   Add an Entry widget of some sort to set the frequency via the GUI. That will also generate code that you can call programmatically. You will need to spawn another thread to do that, since your main thread is going to be hanging in the Wait() call. The second thread can sleep, then call set_frequency() or whatever the correct call turns out to be.   On Wed, Jul 14, 2021 at 1:52 PM Pratik Bhogale <pbhog...@uncc.edu> wrote: My project specifically requires SDRPlay and GNURadio to be used. Also, could you help me with the process to try and change the frequency at runtime? Or point me to a documentation or example that could help. Although I did read as much as I could find on the internet.   From: Jeff Long Sent: 14 July 2021 13:49 To: discuss-gnuradio@gnu.org Subject: Re: [EXTERNAL] Re: Changing the frequency of signal source at runtime   With a recent GNU Radio 3.9, SoapySDR is supported, and there is a soapy sdrplay driver. This requires the sdrplay v3 API and service to be installed.   On Wed, Jul 14, 2021 at 1:16 PM Pratik Bhogale <pbhog...@uncc.edu> wrote: I am using GNURadio 3.7 on my Raspberry Pi. I also wish to use 3.9 on my Jetson Nano, but WX GUIs have been discontinued from 3.8 and later. I am attaching my python file, although I haven’t added anything to it since whatever I tried, didn’t work. tb = top_block_cls() tb.Start(True) tb.Wait() This is the main(), and I tried adding lock and timers but didn’t work, so I have attached the unedited python file. I want to change the frequency after every 5 seconds (might change later), for which I need help. Could you help me with the right commands/functions to invoke? Best, Pratik   From: Glen Langston Sent: 14 July 2021 13:04 To: Pratik Bhogale Cc: discuss-gnuradio@gnu.org Subject: [EXTERNAL] Re: Changing the frequency of signal source at runtime   [Caution: Email from External Sender. Do not click or open links or attachments unless you know this sender.]   Hello   Maybe you could share your .grc or python file.   I’ve had pretty good luck with gnuradio 3.7.13 and SDRPlay RSP1A, where changing the frequency works fine.     I’ve not gotten SDRPlay RSP1A to work with gnuradio 3.8, as they’re not interested in following gnuradio changes any longer.   What gnuradio version are you using?   Regards   Glen   > On Jul 14, 2021, at 11:59 AM, Pratik Bhogale <pbhog...@uncc.edu> wrote: > > Hi team, > I hope you are well. > I need help with changing the tuned frequency of the source RSP1A, after a certain amount of time. > I have tried multiple potential solutions that I found online through mailing lists and FAQs and other solutions fr reconfiguring the flowgraph using lock and unlock, wait and time.sleep(), etc. and then invoking the set_rsp1a_freq_mhz(). > I have not been able to get any result from any of those solutions. > I need my flowgraph to execute for a certain amount of time at a particular frequency for the RSP1A, then I want to change the frequency and rerun the flowgraph for some time, change the frequency again, so on and so forth. > Kindly help in figuring this out. > > Best regards > Pratik Bhogale. >