Re: [Discuss-gnuradio] Ver 3.7 stable?

[Martin Braun]

On 06/07/2014 06:05 PM, Mamoru Yamamoto wrote:
> Dear experts,
> 
> <I send this question to both GNU radio and USRP mailing lists. I do not
> know which is better place for this discussion.>

Mamoru,

in this case, the GNU Radio mailing list would have been better. You can
also cross-post (i.e. post to both mailing lists at once), so we know
you did this, and don't answer twice (as was the case here).

I hope our responses have been helpful!

Martin
> 
> (1) Introduction
> I am Mamoru Yamamoto from Kyoto Univ.
> Some may know that I am doing satellite-beacon experiment
> by using USRP1 + GNU Radio.  We call the receiver as
> GRBR (GNU Radio Beacon Receiver).
> http://www.rish.kyoto-u.ac.jp/digitalbeacon/
> Sorry this web site is very old.  Now I am using
> USRP1 + uhd + GNU Radio from python script
> Also I am using Ubuntu 12.04LTS.
> My application is a very simple dual-channel receiver
> recording IQ time-series on two files.
> The system is VERY stable and useful.  I like it very much.
> 
> (2) Current situation
> Now I try to move to Ver 3.7.
> (I installed the software by "build-gnuradio script".)
> Necessary small changes for me were
> -- "optfir.low_pass" location change
> -- "freq_xlating_fir_filter_ccf" location change & centerfrequency
> setting from negative to positive
> -- "file_sink" location change
> 
> (3) Questions
> These changes were done.  I now start running the system,
> but have problems.  I have 2 questions.
> 
> Q1: I run the modified code with Ubuntu-32bit 12.04LTS.  My code worked
> for several times, but after that, it created only "0-byte" files
> (=immediate stop), and then no files were created.  I checked the uhd
> status, and found that "uhd_find_devices" was successful while
> "uhd_usrp_probe" failed (see below).  I now connect USRP1 to USB3 port.
>  Is this wrong?
> 
> Q2: I also tried to use the same V3.7 code with Ubuntu-64bit 12.04LTS.
> But output file from my code is always 0-bytes (=immediate stop).
> Please tell me if 64bit OS is useless.
> 
> === Check after the problem (Q1) ===
> address@hidden:~/beaconRX$ uhd_find_devices
> linux; GNU C++ version 4.6.3; Boost_104800; UHD_003.007.001-72-g383061d8
> 
> --------------------------------------------------
> -- UHD Device 0
> --------------------------------------------------
> Device Address:
>     type: usrp1
>     name:
>     serial: 2R24X5U1
> 
> 
> address@hidden:~/beaconRX$ uhd_usrp_probe
> linux; GNU C++ version 4.6.3; Boost_104800; UHD_003.007.001-72-g383061d8
> 
> -- Opening a USRP1 device...
> Error: RuntimeError: usb rx6 submit failed: LIBUSB_ERROR_IO
> 
> ==============================
> 
> Thanks for your help and suggestions.
>