Thanks Derek, that last link helped get me in the right direction. I set
both to debug level (to try to get as much output as I can. What bothers
me is that I get this message for sending what I feel like is a valid
command:
gr::debug :DEBUG: gr uhd usrp source0 - Processing command message
((chan . 0) (freq . 2400000000))
but I get the same message for what should be a bad command (and i feel
like should probably print that out):
gr::debug :DEBUG: gr uhd usrp source0 - Processing command message
((chan . 0) (gain . 2400000000))
or even a total made up key:
gr::debug :DEBUG: gr uhd usrp source0 - Processing command message
((chan . 0) (badData . 2400000000))
Am I giving too much credit to how the USRP error checks messages?
On 10/30/2017 11:30 AM, Derek Kozel wrote:
Hi Jason,
The command message handling in the USRP source in GNU Radio is a bit
interesting. The command may contain many pairs of key->value, most of
which end up in a call to their own handler. There is a debug message
printed for each of these handlers if you have GNU Radio debug
messages enabled.
List of supported keys
https://github.com/gnuradio/gnuradio/blob/a0adcd3347c7ffd6ef3c42ce7705a23978774d3b/gr-uhd/lib/usrp_block_impl.cc#L30
There is also error reporting if the command type isn't correct.
https://github.com/gnuradio/gnuradio/blob/a0adcd3347c7ffd6ef3c42ce7705a23978774d3b/gr-uhd/lib/usrp_block_impl.cc#L538
If you aren't seeing the debug messages then try changing your GNU
Radio logging settings.
https://gnuradio.org/doc/doxygen/page_logger.html
Regards,
Derek
On Mon, Oct 30, 2017 at 2:54 PM, Jason Matusiak via USRP-users
<usrp-users@lists.ettus.com <mailto:usrp-users@lists.ettus.com>> wrote:
Is there anyway to get feedback from a sent message command to a
USRP source in GR? I was sending some commands and was /pretty/
sure I was doing it right, but to know for sure I sent a bogus
command, and it didn't complain (I expected to see something on
the terminal). Is there anyway to turn on some sort of print-out
to see that it accepted the commands I am sending (like changing
freqs)? Or at the very least see when a bad command was sent?
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