Re: [Discuss-gnuradio] USRP errors

[Eric Blossom]

On Tue, Jun 14, 2005 at 06:25:42PM -0500, Meenal wrote:
> I have a bidirectional set up using  two USRP's on two machines. Data 
> exchange is achieved with tx and rx scripts.
> 
>                         usrp1               usrp2
>                         -----               -----
>              tx.py      |Src|   <-----------> |Tar| tx.py
>              rx.py      -----               ----- rx.py
> 
> 
> On both sides on running the tx script I get the following errors. However 
> the script never hangs or dies. All data goes through as expected. 
> Eventually I am able to set up a bidirectional link successfully.
> Any ideas about how to resolve these errors ?
> Thanks
> Meenal
> =======================================================================
> address@hidden ./tx.py 1024 1
> >>> gr_fir_fff: using SSE
> TX d'board A: Basic Tx
> TX d'board B: <none>
> 4
> uUuUItems read 1032 items
> fusb: (status -108) Cannot send after transport e ndpoint shutdown
> uU_reap: usb->status = -108, actual_length = 0
> _reap: usb->status = -108, actual_length =     0
> .............
> [Several such messages occur]
> .............
> _reap: usb->status = -108, actual_length =     0
> fusb: (status -108) Cannot send after transport endpoint shutdown
> fusb: (status -108) Cannot send after transport endpoint shutdown
> .............

Hi Meenal,

I've seen these too when running both the Tx and Rx simultaneously on
a single machine.  I'm not sure what to do about them or for that
matter what causes them.

It may be worth spending some time in the USB driver code to figure
out what they really mean.

Eric