Forum: GNU Radio Re: update: new FX2 firmware / boosted USB bandwidth

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Firas A. (Guest)
on 2009-05-12 13:38
(Received via mailing list)
Hi Dominik,

>
> Dominik


This is a great achievement. I tested it with an old 2GHz P4 laptop
(but with good USB controller) and was able to reach about 41MB/sec. The
tests were with/without FPGA HB filter in one direction using your
pre-built images.

USRP1 max transfer of 8 Msps in one direction should be from history
now. I hopes your patches applied to the trunk.

Thank you for sharing it with us.

Best Regards,

Firas
Dominik A. (Guest)
on 2009-05-12 21:52
(Received via mailing list)
> This is a great achievement. I tested it with an old 2GHz P4 laptop  (but with good USB 
controller) and was able to reach about 41MB/sec. The tests were with/without FPGA HB 
filter in one direction using your pre-built images.
Could you try to set different fusb parameters? I observed that, since
the FX2 is less likely to be a bottleneck, tuning of these parameters
may have greater impact than before. E.g. my laptop did an additional 2
MB/s with B = 16384 and N = 1000 (test_usrp_standard_rx -B 16384 -N 1000
etc.).

> Thank you for sharing it with us.
Thanks for the feedback.

Best regards
Dominik
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