Re: [Discuss-gnuradio] Additional code to GRC flowgraph

[Daniel Brogren]

Hi again

I have a MPSK SNR Estimator Probe and a Function Probe that calculates the SNR.

I can not find any information regarding "import" block.

BR
Daniel Brogren

> Date: Fri, 3 Jul 2015 18:46:12 +0200
> From: address@hidden
> To: address@hidden
> Subject: Re: [Discuss-gnuradio] Additional code to GRC flowgraph
>
> Hi Daniel,
>
> if your code really just looks like
>
> from awesometoolkit import skynet
> skynet.kill_sarah()
>
> you can put that into an "import" block.
>
> But: what you describe doesn't sound like you want to modify the top
> block -- it sounds more like you'd want a block to calculate SNR, and
> every f_sample*3 samples change some other block.
>
> Now, this completely depends on the block where the freq. offset is
> used, but you can just write a block (in python or C++, only matters for
> performance), and give that block an message output port, and send
> messages containing the changed parameter to the block that needs
> adjustment.
>
> If you take a look at the frequency xlating fir filter block, it has a
> message port named "freq", which takes in PMT messages in form of
> tuples; these tuples must be of the form
> pmt.pair(pmt.intern("freq"), pmt.from_double(123.131) )
>
>
> Best regards,
> Marcus
> On 07/03/2015 04:27 PM, Daniel Brogren wrote:
> > Hi
> >
> > I'm working with a receiver application in GNU Radio Companion. I would like to add some additional code to the top block but I still want to be able to work with the GRC. Is there a way to add this extra code without the code will be removed when I re-generate the flowgraph from GRC
> > or
> > Could I create a new block that can access the variables in the top block or can execute the set/get functions for the variables in the top block.
> >
> > What I'm trying to accomplish is that every 3rd second I will check the SNR and then do som trimming of a freq-offset. I'm a newbie with GNU Radio and Python but have read through the guided tutorials.
> >
> > BR
> > Daniel Brogren
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>
>
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