Re: [Discuss-gnuradio] Running Flowgraph some a certain period of time

[Marcus Müller]

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Hi Ruecan,

On 12.03.2014 22:52, Ruecan wrote:
> Hello GR,
> 
> * Is there a way how to run my flowgraph for a given number of 
> minutes/seconds then stop it.
Of course.
If what you really want to do is doing a certain number of samples,
the head block is what you need.

If your end condition really comes from outside, you should use
something like topblock.start(), [wait 5s, e.g. using time.sleep()],
toblock.stop(), topblock.wait()
> 
> * I'd like to know too how to reconfigure my flowgraph (after I
> stop it from runtime) and resume its run after I changed for
> example the signal source at the begin of the flowgraph.

> 
> I tried:
> 
> My_flowgraph Description
> 
> def MyRoutine(args): global tb . if (condition): tb.stop() 
> myModifiedflowgraph.myModifiedflowgraph(args) . . .####.
> 
> if __name__ == '__main__': global tb . . 
> threading.Timer(10,myRoutine).start() tb.Run(True)
> 
> My point here is that I need to run myModifiedflowgraph for a
> certain period of time then stop it and resume tb. FYI
> myModifiedflowgraph is the name of the other py script which
> contain the modifiedflowgraph called also myModifiedflowgraph. Any
> hints or explanations are well appreciated
> 
This is not really reconfiguration, as far as I understand your
architecture. It is stopping and starting two different flowgraphs -
which is ok in theory, but you have to find a way to share the
hardware between the two. Which usually defeats the purpose of having
reconfigurable flowgraphs-adjusting your receiver structure to
changing environment.
In this case, it might be a good choide to disconnect() only the
blocks in tb that need to be replaced and connect() the new ones.

Greetings,
Marcus
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