Yes, bringing this back up. Back to the original topic. When I get this FIFO ctrl error, the host is sending back an icmp port unreachable msg to the usrp, I grab this using wireshark.
All I'm doing is running "uhd_usrp_probe". I've tried with and without adding the --args addr=<ip> parameter, same thing using both. I've debugged a bit, and increased the ACK_TIMEOUT in usrp/usrp2/usrp2_fifo_ctrl.cpp from 0.5 to 10.0 and it literally just sits at: Creating the usrp device with: ... -- Opening a USRP2/N-Series device... -- Current recv frame size: 1472 bytes -- Current send frame size: 1472 bytes <sits here for 10 seconds> Then spits out RuntimeError: RuntimeError: fifo ctrl timed out looking for acks Again, there is a switch in between the USRP and the host. Tim On Thu, Jun 13, 2013 at 12:27 AM, Sean Nowlan <sean.now...@gtri.gatech.edu>wrote: > I think 512 is the max value for N on N200/N210 hence 195kSps is minimum > sample rate. > > > Karan Talasila <karan....@gmail.com> wrote: > > @sean can you please tell me how you got minimum sampling rate for usrp > N210 as 100*e6/512. I know that the sampling rate should be 100*e6/N where > N is an integer. So N can be any integer even greater than 512 right. In > that way, what is the minimum that the USRP accepts. what is maximum N that > can be used. > > > On Thu, Jun 13, 2013 at 6:20 AM, Sean Nowlan > <sean.now...@gtri.gatech.edu>wrote: > >> On 06/12/2013 08:49 PM, Marcus D. Leech wrote: >> >>> On 06/12/2013 08:29 PM, Sean Nowlan wrote: >>> >>>> >>>> The minimum "reasonable" sample rate I've used is 2e5 (100e6/2e5 = >>>> 500). I think 100e6/512 = 195312.5 is the smallest supported rate. >>>> >>>> Yup, sorry, you're right. I tend to pick values that are valid for >>> both 64Msps and 100Msps master clock rates, since I write apps that need to >>> be reasonably >>> agnostic with respect to hardware. >>> >>> >>> Ah, makes sense. >> >> >>> >>> >> >> ______________________________**_________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/**listinfo/discuss-gnuradio<https://lists.gnu.org/mailman/listinfo/discuss-gnuradio> >> > > > > -- > Regards > Karan Talasila > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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