Any suggestions!!!!!!!!!!!!!!!
kaleem ahmad wrote: > > Hi Eric and others, > > I also have a similar problem, but it is not limited to 'gain control', > Actually I want to implement an echo back or ping pong transmission > system. > > First I implemented two separate transmitt and receive flow graphs in two > separate transmit(), and receive() functions as mentioned in the > following: > > Master Transceiver: > > Transmit() Transmitt one data packet > Receive() Wait in receive for the echoed back packet or > timeout > > Slave Transceiver: > > if (Receive()): Always wait in receive > Transmit() Transmitt back the received data packet > > But in this method I get an error 'cant open usb device....cant open USRP > 0/1' > > Then I found flowgraph.disconnect() method and thought that I should > implement a single flowgraph which can dynamically connect different > blocks to transmit and then disconnect and connect with receive blocks and > so on... > > Is it possible and is there any example code which doing something like > this or otherwise can you please suggest me some way to do this. > > Thanks > > Kaleem Ahmad > > > > Eric Blossom wrote: >> >> On Fri, Sep 26, 2008 at 06:40:29PM -0700, Karthik Vijayraghavan wrote: >>> Suppose I have myblock = gr.multiply_const_ff(var_value) sitting >>> somewhere in my flowgraph. I want the user to be able to change the >>> value of var_value by using a slider. I know how to make a slider, but >>> I am not able to find information on how to dynamically change the >>> block at runtime. One option that I can think of is to >>> >>> 1. Stop the flow graph >>> 2. Disconnect the block in question with any block it may be connected >>> to >>> 3. Redefine the block with new parameters >>> 4. Reconnect the block >>> 5. Restart the flow graph >>> >>> I tried the above method, but I did know how to redefine an existing >>> block. Do I have to somehow "destroy" or "clear" the existing block >>> before defining another block with the same name? >>> >>> Karthik >> >> >> No need for all of that, just call >> >> myblock.set_k(new_value) >> >> while it's running. >> >> Eric >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> > > -- View this message in context: http://www.nabble.com/Dynamically-changing-parameters-of-a-block-tp19698798p19738563.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
