On 07/09/2023 20:01, 1920swap...@gmail.com wrote:
Well would you say that's still the case if I can run the example if I
just exclude certain parameters? For example if I just give a sample
rate, freq, duration it runs fine. It's just that when I pass the gain
parameter the error shows up. Furthermore, other examples such as
rx_samples_to_udp also run fine, even when I add a gain parameter. The
issue comes when I try to modify the udp example to include 2
channels, then it fails with the same error stated above.
Well, if the standard examples work, and yours doesn't, I would say that
you need to review your modifications to make sure they're
"sane".
It's unlikely that UHD has a bug that causes the "set_gain()" method to
not work in some cases, and two streams vs a single
stream isn't a particularly "weird" case.
When stuff like this happens--where you modify an example, the onus is
on you to do basic debugging, as you would
with any compiled language like C++ or C. Put in some debugging
print statements before and after the call, for example.
Make sure you're providing adequate-sized buffers, so that sample
data isn't over-writing other things in your modified
code. Remember, C++ has NO run-time bounds checking. Everything is
done at compile time, and if a bound cannot
be checked at compile time, there isn't a runtime there to tell you
exactly what you did wrong. That's true of pretty-much
ALL C/C++ programs.
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