Re: [Discuss-gnuradio] E100 - No devices found for ----->

[Ralf]

Hi Josh,

today we managed to make UHD sink and source work in parallel on E100 
using FPGA5.bin
by building UHD like this:

git clone git://code.ettus.com/ettus/uhd.git
cd uhd
git pull git://code.ettus.com/ettus/uhd.git next
cd host/
$ mkdir build
$ cd build
$ cmake -DCMAKE_CXX_FLAGS:STRING="-mcpu=cortex-a8 -mfpu=neon
-mfloat-abi=softfp -g" -DENABLE_USRP_E100=TRUE -DENABLE_USRP_E_UTILS=TRUE -i
../
$ make
$ make test
$ make install
$ ldconfig

Please bear in mind that we are absolute beginners to Gnuradio and E100. 
We started one week ago.
Some more precise information really helps!!
However, your help is appreciated!

Thanks,
Ralf


Am 27.06.2011 18:50, schrieb Josh Blum:
> > we don't manage wih the E100 FPGA5 bitstream.
> > It is placed in the images directory and we use a new branch but we
> > don't really think the FPGA5 is used.
> What do you mean?
>
> > And we still have the same problem with parallel UHD devices (sink/source).
> Another guy confirmed it was working for him just fine.
>
> In any case, I think it will also work if you patch this onto the master
> branch (very small change): http://pastebin.com/JinMRTTD
>
> > Which branch shall we use? Can you pinpoint exactly?
> > Shall we use the Josh branch from http://gnuradio.org/cgit ?
> For gnuradio? The master branch on gnuradio.org is fine.
>
> > Do you have images available? We still don't have a cross-compile env. yet.
> > Hence compilation takes very long time...
> Yes :-)
>
> http://code.ettus.com/redmine/ettus/projects/usrpe1xx/wiki/Experimental_Images
>
> > Another topic we recognized on E100 is that we suspect incomplete datastreams
> > when the Gumstix is overloaded performancewise. I will come back with details
> > on our transmitter setup which might cause overloads.
> > But - is it possible to overload the 720MHz Gumstix easily? What happens in
> > this case - samples are discarded?
> On receive, the host backpressures the FPGA. See
> http://www.ettus.com/uhd_docs/manual/html/general.html#overflow-underflow-notes
>
> -Josh