Re: [Discuss-gnuradio] GrExtras - write blocks in python, message passing, misc features...

[Martin Braun]

On Tue, Jun 05, 2012 at 01:25:33PM -0700, Josh Blum wrote:
> Actually, I think that should work just fine.
> 
> I haven't created a control-plane sort of demo, I guess I should make
> that a mini project this weekend. But in theory, if block A feeds block
> B a stream, block B could have a message source that feeds a message
> sink on block A.
> 
> That shouldnt violate any of gnuradio's circular link checks when it
> flattens the hierarchy, because the message part of the blocks are
> actually separate blocks internally.

Yep, it works :)

I actually tried to connect two blocks such that the upstream block
passes msgs to the downstream block through tags (they also pass
samples) and the downstream block feeds back messages to the first one.

So although the second connection is not synched to the rest, this
allows some sort of feedback loops, and that's pretty nice.

MB
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