- Not sure on the .grc file, maybe you can provide a timestamp? But all of
our example .grc files are in current GNU Radio in the gr-uhd directory (
https://github.com/gnuradio/gnuradio/tree/main/gr-uhd/examples/grc).
- We're still catching up with the docs, so I'm afraid we don't have good
docs for rfnoc_modtool outside the man page. If you want to add GNU Radio
bindings and are using UHD 4.8, then you can use a combination of
gr_modtool to generate a GNU Radio OOT within your RFNoC OOT, and perusal
of the rfnoc-gain example OOT that we provide to see what the end result
should look like.
- We're slowly standardizing on SystemVerilog over Verilog, because it just
has so many good features. For that reason, new files generated from
rfnoc_modtool simply are all .sv files, even though the code didn't' change
(a bit like C/C++, Verilog is a subset of SystemVerilog so it will still
compile to the same RTL).

--M

On Wed, Sep 24, 2025 at 5:39 PM Peter Gu via USRP-users <
usrp-users@lists.ettus.com> wrote:

> Hello Martin,
>
>
> thanks for the fast reply! I managed to build the image with three SEPs
> and just one replay block. However I have three more questions:
>
> 1) I was not able to find a .grc template which was given in <UHD4.6, e.g.
> shown in this video https://www.youtube.com/watch?v=M9ntwQie9vs Are there
> any examples available from your team?
>
> 2)
> https://kb.ettus.com/Getting_Started_with_RFNoC_in_UHD_4.0#Example_RFNoC_Image
> states that the rfnoc_modtool should be used. However according to
> https://man.archlinux.org/man/extra/libuhd/rfnoc_modtool.1.en there are
> way more instructions, e.g. add-gr-oot. I know this instruction is for
> UHD4.9.0.0, but I wasn’t able to find it for UHD4.8.0.0, which i am
> currently using. In UHD4.8.0.0, it seems that rfnoc_modtool only supports
> create and add.
>
> Further, it seems to me that there are no instructions available how to
> use rfnoc_modtool, did i just missed them and if yes, can you please send
> me the link?
>
> 3) I saw that you moved from .v to .sv files. What are the reasons?
>
> Thanks!
>
>
> Best,
>
> Peter
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