On Wed, Aug 17, 2011 at 21:50, Nick Foster <[email protected]> wrote: > On Wed, 2011-08-17 at 21:47 +0400, Alexander Chemeris wrote: >> On Wed, Aug 17, 2011 at 21:15, Nick Foster <[email protected]> wrote: >> > On Wed, 2011-08-17 at 18:00 +0400, Alexander Chemeris wrote: >> >> Hi Nick, >> >> >> >> On Sat, Aug 13, 2011 at 02:41, Nick Foster <[email protected]> wrote: >> >> > On Fri, 2011-08-12 at 23:26 +0100, Nemanja Trecakov wrote: >> >> >> 1) Did anybody use this external SRAM >> >> >> on USRP2 before? According to the FAQ page the usual FPGA build is >> >> >> not using it. >> >> >> (http://gnuradio.org/redmine/projects/gnuradio/wiki/USRP2GenFAQ) >> >> >> However, my experience with these pages is that many of them are >> >> >> outdated. I also found the folder called extramfifo in >> >> >> uhd/fpga/usrp2 folder for which I believe has something to do with >> >> >> external RAM.True? >> >> > >> >> > The external SRAM is currently used for buffering TX packets. >> >> >> >> Is it true for USRP N and latest git too? >> >> >> > >> > yes >> > >> >> By Tx do you mean Ethernet->RF aka RF Tx, or RF->Ethernet aka Eth Tx? > > RF TX. It's there as a buffer so you can use timestamped TX packets to > say "send this data at exactly time X".
Thanks. I've updated FAQ: http://gnuradio.org/redmine/projects/gnuradio/wiki/USRP2GenFAQ#What-is-the-1-Megabyte-SRAM-used-for Please check if I'm correct. -- Regards, Alexander Chemeris. _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
