Re: [Discuss-gnuradio] How to generate control signals between block?

[Eric Blossom]

On Tue, Mar 06, 2007 at 09:57:57PM +0100, Trond Danielsen wrote:
> 2007/3/5, Greg Troxel <address@hidden>:
> >
> >  Once such a packet is found then the flowgraph has a message sink
> >  and puts this half-baked packet in this queue, together with
> >  possibly another message of a different TYPE (control message) with
> >  some parameters required in the second flow (such as initial phase
> >  estimate, etc).
> >
> >Have you looked at the m-block design (discussion in list archives)
> >and work in progress?  I realize it's not ready yet, and that you
> >might want to do something before it is, but it seems like this is an
> >ad hoc version of the more general scheme.
> 
> I read about the m-block architecture, and I must say that is seems
> very nice, but a bit too complicated for my simple needs. I just need
> to estimate some parameters at a low rate, and update another graph
> dynamically.

It should be pretty straight-forward to use (said the person
implementing it...)  Basically you send and receive messages.

In the interim, you can use the existing gr.message and
gr.msg_queue primitives to get the job done.

Eric