I posted this question before but never get any response so I am posting
again because it have become a serious problem for me and I am unable to
solve it. Because of it my entire project is delayed. I have read many
which address a similar problem but most of them were in 2006-2007 and I
could not find any clue to solve my problem.
Actually I want to implement an echo back or ping pong transmission
(This is actually a small or starting part of a big project)
First I implemented two separate transmitt and receive flow graphs in
separate transmit(), and receive() functions as mentioned in the
Transmit() Transmitt one data packet
Receive() Wait in receive for the echoed back packet
if (Receive()): Always wait in receive
Transmit() Transmitt back the received data
But in this method I get an error ‘cant open usb device…cant open
Then I found flowgraph.disconnect()/disconnect_all() methods and thought
that I should implement a single flowgraph which can dynamically connect
different blocks to transmit and then disconnect and connect with
blocks and so on… as follows (my perception):
Is it possible (I mean can I do exactly as above, or how can I implement
such a cyclic graph) and is there any example code which doing something
like this or otherwise can you please suggest me some way to do this.
Please either suggest some solution to ‘cant open usb device…cant
USRP 0/1’, or to this cyclic-reconfigurable graph.
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