Thomas, Thank you for you answer. Do you mean I can not achieve the goal by modifying its softare code beause of hardware restriction ? I have nothing to do except using more usrps?Thank you! lishan_wh<br><br>在2010-04-26 21:55:57,"Thomas Tsou" <tt...@vt.edu> 写道: >2010/4/26 lishan_wh <lishan...@126.com>: >> Hi all, >> I want to use tunnel.py to make a usrp with two daughter boards work as >> two pieces of wireless cards. The first time I run tunnel.py, it works well, >> and generate gr0. But when I run tunnel.py for the second time (in another >> terminal) to configure the other daughter board, it turned out error "Unable >> to find usrp1". >> Is it possible to generate two wireless cards with only one usrp with two >> doughter boards instead of with two usrps? If it is, what should I do? > >No. At least not with the current implementation. The first run of >tunnel.py opens up the usrp connection and any subsequent instances >will fail since the usrp is already in use. The daughterboards are >configured through the usrp interface, so you can't manipulate them >independently from different programs. > > Thomas
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