Hi Andrew, Please take note of this section of the KB with regards to FPGA modifications: https://kb.ettus.com/X300/X310#FPGA_User_Modifications
The PCIe interface and LvFpga_Chinch_Interface cannot be modified, even if you are not using PCIe as a transport, as it will brick the flash memory: https://github.com/EttusResearch/fpga/blob/maint/usrp3/top/x300/x300.v#L656 As Leandro mentioned, removing the DDC/DUCs will result in the most gains. You could possibly adjust the HB and max CIC within the DDC/DUC to reduce utilization at the cost of reducing your resampling range. Regards, Nate Temple On Tue, Jan 29, 2019 at 11:55 AM Leandro EchevarrÃa via USRP-users < usrp-users@lists.ettus.com> wrote: > Hey Andrew, > > Have you confirmed the available resources are not enough for your > purpose? > If so, I'd suggest you run the build command with the GUI option on, > implement the design using the Vivado interface, and run a > post-implementation utilization report to see which blocks are consuming > the most. Still, there is not much that can be taken away without bricking > the core, but if I recall correctly removing the DDCs and DUCs could > release about 5 or 10% of the resources. This would, of course, reduce the > functionality, forcing you to run the device at full rate all the time. > > Regards, > > Leo > > On Tue, Jan 29, 2019 at 4:15 PM Andrew Thommesen via USRP-users < > usrp-users@lists.ettus.com> wrote: > >> Hi, >> >> I was wondering if there is any way to reduce the resources used by the >> default RFNoC image. It currently utilises ~50% of the Kintex-7 FPGA of the >> Ettus X310, and I want to make more resources available (LUTs and FFs >> mainly) for bespoke firmware development. >> >> Thanks, >> >> Andy >> >> Sent from Outlook <http://aka.ms/weboutlook> >> _______________________________________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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