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View all threadsList of all possible "--args=..." parameters
Hello!
Is there any single place where one could look for a list of device arguments that can be passed in --arg=... CL param [= to usrp_make() func]? From time to time I encounter one or the other of those here and there, but never succeeded to find them all in one place. If there isn't, can you please collect them in some convenient way?
Particularly, I'm interesting if I can speed up the initial uhd_usrp_make(), specifying exact details of my hw config, for usrp_make() not to waste time on various auto-detection procedures. For example, if I don't have GPSDO, can I pass any parameter in device_args instructing not to search for it? Since I notice that it takes some time of approx. 1 second. What else (except IP and device type) can I specify to speed up initialization, if I use X300 + 1 UBX, w/o GPSDO over 10GBE connection?
It would be great to have in such a list other interesting things as well, eg master clock setting, things like self_cal_adc_delay and similar 'fine tuning' stuff.
Thank you!
Vladimir
Оn the same subject: can I instruct usrp_make() to skip any calibration/tests for the second channel (or even turn it off or tell it in some other way that I'm not using it), if I know that I'm planning to use only one (eg RX2) channel in this run? I mean if it's at all effective in minimizing the initialization time.
Vladimir
Пятница, 5 августа 2016, 15:10 +03:00 от Vladimir www2008_2@mail.ru:
Hello!
Is there any single place where one could look for a list of device arguments that can be passed in --arg=... CL param [= to usrp_make() func]? From time to time I encounter one or the other of those here and there, but never succeeded to find them all in one place. If there isn't, can you please collect them in some convenient way?
Particularly, I'm interesting if I can speed up the initial uhd_usrp_make(), specifying exact details of my hw config, for usrp_make() not to waste time on various auto-detection procedures. For example, if I don't have GPSDO, can I pass any parameter in device_args instructing not to search for it? Since I notice that it takes some time of approx. 1 second. What else (except IP and device type) can I specify to speed up initialization, if I use X300 + 1 UBX, w/o GPSDO over 10GBE connection?
It would be great to have in such a list other interesting things as well, eg master clock setting, things like self_cal_adc_delay and similar 'fine tuning' stuff.
Thank you!
Vladimir
Can anybody from Ettus at least say couple words on the reason of ignoring the question about cutting device start up time? Doesn't it make any sense? Even if this is impossible/requiring development efforts, please confirm it.
Surprising silence for this usually responsive list...
Vladimir
Пятница, 5 августа 2016, 15:28 +03:00 от Vladimir via USRP-users usrp-users@lists.ettus.com:
Оn the same subject: can I instruct usrp_make() to skip any calibration/tests for the second channel (or even turn it off or tell it in some other way that I'm not using it), if I know that I'm planning to use only one (eg RX2) channel in this run? I mean if it's at all effective in minimizing the initialization time.
Vladimir
Пятница, 5 августа 2016, 15:10 +03:00 от Vladimir < www2008_2@mail.ru >:
Hello!
Is there any single place where one could look for a list of device arguments that can be passed in --arg=... CL param [= to usrp_make() func]? From time to time I encounter one or the other of those here and there, but never succeeded to find them all in one place. If there isn't, can you please collect them in some convenient way?
Particularly, I'm interesting if I can speed up the initial uhd_usrp_make(), specifying exact details of my hw config, for usrp_make() not to waste time on various auto-detection procedures. For example, if I don't have GPSDO, can I pass any parameter in device_args instructing not to search for it? Since I notice that it takes some time of approx. 1 second. What else (except IP and device type) can I specify to speed up initialization, if I use X300 + 1 UBX, w/o GPSDO over 10GBE connection?
It would be great to have in such a list other interesting things as well, eg master clock setting, things like self_cal_adc_delay and similar 'fine tuning' stuff.
Thank you!
Vladimir
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This must have slipped past, sorry about that Vladimir.
The most effective thing is to always specify an explicit device
identifier in --args, which will bypass the discovery phase. But in
terms of subsystem-by-subsystem bypass of initialization sequences,
there's nothing in support of that.
I'm guessing that you're asking this because you have a flow that you
want to "trigger", have it come up, do its job, and then exit. And you
want this process to be as fast as possible.
Your best approach may be to have a flow running all the time, and use
some kind of external signalling to have it become "active" when you
need it.
On 2016-08-08 11:08, Vladimir via USRP-users wrote:
Can anybody from Ettus at least say couple words on the reason of ignoring the question about cutting device start up time? Doesn't it make any sense? Even if this is impossible/requiring development efforts, please confirm it.
Surprising silence for this usually responsive list...
Vladimir
Пятница, 5 августа 2016, 15:28 +03:00 от Vladimir via USRP-users usrp-users@lists.ettus.com:
Оn the same subject: can I instruct usrp_make() to skip any calibration/tests for the second channel (or even turn it off or tell it in some other way that I'm not using it), if I know that I'm planning to use only one (eg RX2) channel in this run? I mean if it's at all effective in minimizing the initialization time.
Vladimir
Пятница, 5 августа 2016, 15:10 +03:00 от Vladimir <www2008_2@mail.ru [1]>:
Hello!
Is there any single place where one could look for a list of device arguments that can be passed in --arg=... CL param [= to usrp_make() func]? From time to time I encounter one or the other of those here and there, but never succeeded to find them all in one place. If there isn't, can you please collect them in some convenient way?
Particularly, I'm interesting if I can speed up the initial uhd_usrp_make(), specifying exact details of my hw config, for usrp_make() not to waste time on various auto-detection procedures. For example, if I don't have GPSDO, can I pass any parameter in device_args instructing not to search for it? Since I notice that it takes some time of approx. 1 second. What else (except IP and device type) can I specify to speed up initialization, if I use X300 + 1 UBX, w/o GPSDO over 10GBE connection?
It would be great to have in such a list other interesting things as well, eg master clock setting, things like self_cal_adc_delay and similar 'fine tuning' stuff.
Thank you!
Vladimir
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Hi Vladimir,
sorry for being so silent on this; I meant to reply, and just forgot
about it.
So, no, we don't have a comprehensive table of options; just the common
options we list in [1]. Having such a table would be a good idea,
though, I agree.
Regarding speeding up the detection:
The most speedup will probably be attainable via
"type=x300,addr=IP.ADDRESS.OF.DEVICE" ; we don't really have much other
options. You could try to disable the "disable_adc_self_test" flag, but
I don't think that will gain much time.
Disabling GPSDO detection would actually be pretty easy to do; adding an
option to [3] would do that, but there's nothing in place to allow you
to disable it right now.
Best regards,
Marcus
[1] http://files.ettus.com/manual/page_configuration.html
[2]
https://github.com/EttusResearch/uhd/blob/master/host/lib/usrp/x300/x300_impl.cpp#L932
[3]
https://github.com/EttusResearch/uhd/blob/master/host/lib/usrp/x300/x300_impl.cpp#L856
On 08/08/2016 05:08 PM, Vladimir via USRP-users wrote:
Can anybody from Ettus at least say couple words on the reason of
ignoring the question about cutting device start up time? Doesn't it
make any sense? Even if this is impossible/requiring development
efforts, please confirm it.
Surprising silence for this usually responsive list...
Vladimir
Пятница, 5 августа 2016, 15:28 +03:00 от Vladimir via USRP-users
<usrp-users@lists.ettus.com>:
Оn the same subject: can I instruct usrp_make() to skip any
calibration/tests for the second channel (or even turn it off or
tell it in some other way that I'm not using it), if I know that
I'm planning to use only one (eg RX2) channel in this run? I mean
if it's at all effective in minimizing the initialization time.
Vladimir
Пятница, 5 августа 2016, 15:10 +03:00 от Vladimir
<www2008_2@mail.ru <mailto:www2008_2@mail.ru>>:
Hello!
Is there any single place where one could look for a list of
device arguments that can be passed in --arg=... CL param [=
to usrp_make() func]? From time to time I encounter one or the
other of those here and there, but never succeeded to find
them all in one place. If there isn't, can you please collect
them in some convenient way?
Particularly, I'm interesting if I can speed up the initial
uhd_usrp_make(), specifying exact details of my hw config, for
usrp_make() not to waste time on various auto-detection
procedures. For example, if I don't have GPSDO, can I pass any
parameter in device_args instructing not to search for it?
Since I notice that it takes some time of approx. 1 second.
What else (except IP and device type) can I specify to speed
up initialization, if I use X300 + 1 UBX, w/o GPSDO over 10GBE
connection?
It would be great to have in such a list other interesting
things as well, eg master clock setting, things like
self_cal_adc_delay and similar 'fine tuning' stuff.
Thank you!
Vladimir
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