Re: [Discuss-gnuradio] Re: save date and value to an rotating file

[Josh Blum]

> > and you can always add custom blocks that you write:
> > http://gnuradio.org/trac/wiki/GNURadioCompanion#AddingCustomBlocks
> But Custom Blocks rely on custom sinks and sources. I need to
> process the data through an own python file sink method, with rotate
> and time feature.
> Or is this still possible ?
> As i understood, processing of data is made in c++ and the
> connection+gui is made in python.

You can do it all in python by making a hier block, and using gr message 
sinks and sources. See pkt.py as an example:

http://gnuradio.org/trac/browser/gnuradio/trunk/gnuradio-core/src/python/gnuradio/blks2impl

> > x**.5
> Thanks for the hint.
> But which grc modul apply this mathematical function on incoming data
> and outputs it ?
> I mean to apply mathematical function to incoming data from an Usrp
> Source not a constant variable.
> >


I think there is a block for this gr_feval_cc, gr_feval_ll, gr_feval_dd. 
I have never used it, but I think the idea is that you can inherit from 
this class and override the eval function in python.

-Josh