Hi,

Those instructions are for UHD 3.15. With UHD 4.0, the replay block is
included by default in the N310, as you can see here in the N310's FPGA
image yaml file:
https://github.com/EttusResearch/uhd/blob/UHD-4.0/fpga/usrp3/top/n3xx/n310_rfnoc_image_core.yml#L71
.

Jonathon

On Fri, Aug 6, 2021 at 9:44 PM Tellrell White via USRP-users <
[email protected]> wrote:

> Hello
> Currently, I'm trying to reproduce the RFNoC replay example shown at the
> following link
>
> https://kb.ettus.com/Using_the_RFNoC_Replay_Block
>
> using the USRP N310. The version of UHD that I'm using is 4.0, which by
> default already has RFNoC enabled. According to the link  above, if you're
> using the N310, than you're instructed to modify the file
> fpga-src/top/n3xx/n3xx_core.v with the appropriate changes which
> instantiates the noc_block_replay instead of noc_block_axi_dma_fifo, and
> then rebuild the image. My question is if I'm using UHD 4.0, do I need to
> make any of the changes discussed above or is the RFNoC replay block
> already included in the default N310 FPGA image as highlighted in the
> following link, which is more updated?
>
> https://kb.ettus.com/Getting_Started_with_RFNoC_in_UHD_4.0#Setting_Up
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