The N310 stock filesystem does not have gnradio. You are right that my focus is on the wrong thing. I just tried benchmark_rate and tx_waveforms and they stream just fine at 1.25Ms/s.
I'm going to go back and read the documentation more carefully. We might be saving our waveform in a form that UHD does not understand but gnuradio does. On Thu, Feb 7, 2019 at 4:43 PM Rob Kossler <rkoss...@nd.edu> wrote: > On Thu, Feb 7, 2019 at 1:36 PM Ali Dormiani via USRP-users > <usrp-users@lists.ettus.com> wrote: > > 1. 1.25 Ms/s would be nice but lower is ok. We are trying to sound some > channels as a test so bandwidth is not a big deal. > This rate seems low enough that it should work streaming from the N310 > CPU. The ARM <> FPGA link should be able to handle 4 channels at 1.25 > MS/s. I know that you previously said that you got Overruns even at > the lowest rate, but this to me is an indication that something else > is wrong. > > > 2. If gnuradio can run on the arm cpu then thats great! We already have > python files (made by gr-companion) so all we would need to do is make a > custom N310 filesystem that has gnuradio on it? > gnuradio should already be on the n310 file system. I'm pretty sure > that the stock file system has it. > > > But why would the ARM cpu be too weak to stream via UHD yet still be > good enough to run gnuradio enabled python files? I'm not a computer > scientist but python is a lot slower than a low level c++ api right? > You're right, it wouldn't be. But, I don't believe that the ARM is > too weak for these sample rates. It should work with both c++ (such > as example programs) and python. > > I would focus on what is going wrong that you can't even get these > samples rates. Perhaps try the benchmark_rate example program. Once > you fix whatever problem exists, you should be able to use gnuradio to > stream multiple channels as you desire. > > Rob >
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