It appears that in all of the x410 and x440 image core yaml files, that EP0 is the only endpoint that is configured with `ctrl:True`. Is this necessary and why is EP0 the only endpoint that requires control? Thank you! Andrew

Hi Andrew, This is true of all RFNoC images. The "ctrl" setting refers to whether or not that endpoint has a connection to the control crossbar, which is used for sending control packets (e.g., register reads/writes) to/from RFNoC blocks. Because you can send control packets to any RFNoC block from any control port master, you only need one endpoint with a control port to be able to do control communication with all the RFNoC blocks. So you have to have at least one endpoint with a control port and having more than one wastes logic because currently only the first one will be used. Wade On Thu, Oct 31, 2024 at 9:24 AM Andrew D <sciensfpgaeng@gmail.com> wrote: > It appears that in all of the x410 and x440 image core yaml files, that > EP0 is the only endpoint that is configured with `ctrl:True`. Is this > necessary and why is EP0 the only endpoint that requires control? > > Thank you! > Andrew > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-leave@lists.ettus.com >

Wade, Thank you very much for the detailed explanation. On Fri, Nov 1, 2024 at 10:35 AM Wade Fife <wade.fife@ettus.com> wrote: > Hi Andrew, > > This is true of all RFNoC images. The "ctrl" setting refers to whether or > not that endpoint has a connection to the control crossbar, which is used > for sending control packets (e.g., register reads/writes) to/from RFNoC > blocks. Because you can send control packets to any RFNoC block from any > control port master, you only need one endpoint with a control port to be > able to do control communication with all the RFNoC blocks. So you have to > have at least one endpoint with a control port and having more than one > wastes logic because currently only the first one will be used. > > Wade > > On Thu, Oct 31, 2024 at 9:24 AM Andrew D <sciensfpgaeng@gmail.com> wrote: > >> It appears that in all of the x410 and x440 image core yaml files, that >> EP0 is the only endpoint that is configured with `ctrl:True`. Is this >> necessary and why is EP0 the only endpoint that requires control? >> >> Thank you! >> Andrew >> _______________________________________________ >> USRP-users mailing list -- usrp-users@lists.ettus.com >> To unsubscribe send an email to usrp-users-leave@lists.ettus.com >> >