Dear experts,
(1) Introduction
I am Mamoru Y. 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) ===
beacon@Beacon-36:~/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
beacon@Beacon-36:~/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.
–
Mamoru Y. / RISH, Kyoto University
[email protected]
Phone +81-774-38-3814, Cell +81-90-5653-7555
On 06/07/2014 06:05 PM, Mamoru Y. wrote:
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?
It’s not wrong, but it doesn’t help you with anything. Does it work on
the USB2 port?
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.
No, it’s not. Are you sure this is not connected to the USB error?
M
Thanks friends,
<Again cross posting. I am not good at using the mailing list. I keep
the subject the same, and hope that this post will be connected to the
same thread.>
Thank you for all suggestions. They are very helpful.
I am continuing the long-run test. Until now the failure occurred only
one time (that was my report). After that the system is working fine
for several days. Now I connect my USRP1 to USB2 port, and it is
working fine with 32-bit Ubuntu. Thanks for your suggestions. The
reported failure occurred with USB3 port. I can avoid it.
I am sorry I do not pursue the 64-bit Ubuntu issue.
Mamoru Y.
(2014/06/08 1:05), Mamoru Y. wrote:
http://www.rish.kyoto-u.ac.jp/digitalbeacon/
Necessary small changes for me were
for several times, but after that, it created only “0-byte” files
beacon@Beacon-36:~/beaconRX$ uhd_find_devices
beacon@Beacon-36:~/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.
–
Mamoru Y. / RISH, Kyoto University
[email protected]
Phone +81-774-38-3814, Cell +81-90-5653-7555
On 06/07/2014 06:05 PM, Mamoru Y. wrote:
Dear experts,
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