Re: [Discuss-gnuradio] USRP2 MIMO setup problem

[abbasi9999]

Hi,
Is there any files for  using two usrp2  as a receivers not as transmitters?
thanks


sri ram-2 wrote:
> 
> Hi all,
>     I am trying to create a two transmitter setup with two USRP2s
> connected
> with the MIMO cable. I use the trunk version of GNURadio (Friday, Jan
> 29,2010) on laptops running Ubuntu 9.04.
> 
> From previous emails and looking at the code, the relevant code for two
> transmitter setup seems to be the test_mimo_tx file in usrp2/host/apps. I
> update the firmware of the master USRP2 with mimo_tx.bin as pointed out in
> http://gnuradio.org/redmine/wiki/gnuradio/USRP2UserFAQ.
> 
> sudo ./u2_flash_tool --dev=/dev/sdb -t s/w apps/mimo_tx.bin -w
> 
> and for the slave USRP2, I use
> 
> sudo ./u2_flash_tool --dev=/dev/sdb -t s/w apps/mimo_tx_slave.bin -w
> 
> When I invoke the transmission program at the sender laptop using
> 
> sudo ./test_mimo_tx -f 2.412G -I a.dat -i 100 -r
> 
> I observe the following message:
> 
> usrp2::ctor reset_db failed.
> 
> The USRP2 freezes after this and the host cannot find it using find_usrps.
> The archives of the mailing list suggest updating the firmware to solve
> this
> issue. But I want to use the MIMO firmware and not the usual txrx.bin.
> 
> 1. Is there firmware for the MIMO master and slave, which does not have
> this
> problem?
> 
> 2. What modifications need to be incorporated to the current MIMO files to
> fix this problem?
> If there is not a solution already, I am thinking of modifying the
> existing
> MIMO USRP2 related files. Any pointers on what are to be taken care of,
> will
> be very useful.
> 
> 
> Thanks,
> Sri
> 
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> 
> 

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