[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Discuss-gnuradio] dropped bits?
From: |
John E. Don Carlos |
Subject: |
[Discuss-gnuradio] dropped bits? |
Date: |
Sat, 2 Jul 2005 22:57:42 -0700 |
I added head followed by save_file to tvrx_debug.py to save data for further
analysis. The terminal shows some u0u0 activity which may indicate that
data is lost. tvrx_debug does not output u0u0 without save_file (with or
without head) unless the mouse is moved. Apparently mouse motion or
save_file is interfering with the USB transfer, perhaps delaying servicing
USB interrupts? The decimated sample rate is 8MSamples/sec.
Is there a way to store the data sample in memory and save it to file at the
end of the data gathering period?
I don't know USB or the USRP details, but at 32MB/s an interupt would occur
every 15 ms if the data is buffered in 0.5 MB chunks. My pentium is
hyper-threaded - is there a way to dedicate one thread to service the USB
interupts?
Thanks,
John
- [Discuss-gnuradio] dropped bits?,
John E. Don Carlos <=