Re: [Discuss-gnuradio] Updating variable by passing message

[mohammad nejati]

Thanks Brian ,
But how work QT Range slider ? for example if use a range slider for
one of taps value in FFT taps for example
[0.1,0.001,0.2,My_range_slider_ID,0.2,...] changing value of slider in
run time update FFT filter taps without any problem . i need some
thins like that but it get value from message port .

On Sat, Aug 12, 2017 at 2:34 PM, Brian <address@hidden> wrote:
> Mohammed,
>
> That's good question and I'm working on a project that requires me to do
> similar but mine is frequency.
>
> I believe that once a code is run and your receiver is running that changing
> a variable is not possible.
>
> However I have a workaround, I am using a file as a source which will be
> either blank (so no action takes place) or a frequency value, this triggers
> a reset of python and then reads in the value as a variable.
>
> This works quite well in my case but may not suit all applications.  My
> receiver only needs to be on when I trigger it from the transmitter, it
> can't be used if you're looking for a constant FFT plot.
>
> Hope this helps and if there are any suggestions for a more refined solution
> that would be great.
>
> Brian
> ________________________________
> From: mohammad nejati
> Sent: ‎12/‎08/‎2017 10:51
> To: address@hidden
> Subject: [Discuss-gnuradio] Updating variable by passing message
>
> Hi ,
> I want to update taps in "FFT FILTER" block in run time , i have a
> block that can send this taps as a message every 1 secound . i write
> an python block witch get this message what i want to do is get this
> message and update value of a variable block wich is used in FFT
> FILTER . but i dont know how i can update a variable block value in
> python code , is that possible at all ?
>
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