Re: [Discuss-gnuradio] uhd::tune_result_t vs. usrp2::tune_result

[Moritz Fischer]

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On 11/25/2010 05:44 PM, Josh Blum wrote:

> In UHD, you set the sample rate. However for usrp2 and usrp1 gnuradio
> drivers, you set the decimation and interpolation and the sample rate is
> implied to be codec_rate/decim.

Ok, I got it working now for some of the demos (benchmark_tx/rx),
however it's far from looking nice enough for a merge ;-)

While looking at the code I was wondering whether
we still have to support the 'legacy' interface on next.

If not, I'll attempt to throw out the old stuff from the digital
examples and just use the uhd sources/sinks for the examples;UHD should,
if compiled with support for USRP1, automatically select the right
sources/sinks as far as I know(?) at least that's what it does in my tests.

Now if I connect say two USRP2s and one USRP1, is there any way to
influence the order in which they'll be selected? For the USRP2s the
'addr=...' parameter seems to work, but how would I do the same to
select one USRP2 and one USRP1?

And now for something completely different ;-)

While playing with the USRP1 it occured to me, that I had to manually
copy the std.ihx from $PREFIX/share/usrp/rev4/std.ihx to
$PREFIX/share/uhd/images/usrp1_fw.ihx in order to get UHD to find the USRP1.

Looking at line 64 and following in host/lib/usrp/usrp1/usrp1_impl.cpp
in UHD, if I got it right, we search for a file called 'usrp1_fw.ihx'.

Did I miss some under the hood magic or is this file 'missing' in the
images package?

Again thanks and happy hacking,

Moritz

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