Re: [Discuss-gnuradio] usage? Retuning w/o rebuilding

[Chuck Swiger]

At 01:14 PM 1/12/2005 -0800, you wrote:
> On Wed, Jan 12, 2005 at 02:50:06PM -0500, Chuck Swiger wrote:
> > At 05:42 PM 1/11/2005 -0800, you wrote:
> >
> >
> > >You can set the frequency on the freq_xlating_fir_filter at any time.
> > >Just call set_center_freq.
> > >
> > >It's also possible to change the user specified filter taps on the fly
> > >too.  Use set_taps, though it isn't often required.
> >
>
> >
> > Cool!  And I see the code that sets the freq has to be in the
> > same python module def as the instantiation to access it.
>
> ... or needs some way to get a hold of the filter instance ...


Ah, this works:

def build_graph (stuff) :

   fg = gr.flow_graph ()

   chan_filter_no9 = gr.freq....

   return fg, chan_filter_no9         <--- returns a tuple


def main () :

    tuple = build_graph (stuff)

    tuple[0].start()                        <--- access 1st item in tuple

    tuple[1].set_center_freq (newfreq)         <--- access 2nd item in tuple