16 Jul
2013
16 Jul
'13
4:47 a.m.
On Mon, Jul 15, 2013 at 10:54 PM, Thomas Tsou <tom(a)tsou.cc> wrote:
On Mon, Jul 15, 2013 at 1:19 PM, Alexander Chemeris
<alexander.chemeris(a)gmail.com> wrote:
Worst case we should be able to align the transceiver clock with UHD
instead of resetting UHD clock.
--
Regards,
Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио
http://fairwaves.ru
On Mon, Jul 15, 2013 at 2:35 PM, Thomas Tsou
<ttsou(a)vt.edu> wrote:
There does seem to be something strange going on with UHD. After restart and
clock reset the device is reporting time correctly, but subsequent packets
do not reflect the change. We've had similar issues before due to lingering
packets in the socket buffers, but the same fix (flushing buffers after
issuing STREAM_MODE_STOP) doesn't fix the issue.
Rx timestamp 10.3679
Rx timestamp 10.3698
----POWEROFF----
----POWERON----
UHD device time 0.00440694
Rx timestamp 10.3732
This may be a bug in UHD, or some oddity in the UHD streamer interface. I'm
going to try it with an outside test case. This is a very positive patch set. As you very
well know, the power
on/off handling was in a ugly state. One of the remaining issue with
UHD start/stop is that the device clock is reset to zero at restart,
but not all of the timestamp counters are reset in radioInterface. The
radioInterface is not stopped at all until deallocation since
'POWEROFF' is an empty command.
I made an attempt to implement it in the 806a64b1 patch. If you check
out this commit, you should get the assert during TURN ON/OFF/ON
sequence. To start/stop transceiver I use scripts attached to this
e-mail.