Re: [Discuss-gnuradio] Message passing(connect) in C++

[marco Ribero]

I want to exchange data between adjacent blocks which are already connected through the GUI, without ask to the user to write  additional code.

So my approach would be: the upper block send down its name(through tags) and the lower block configure the communication, so I thought to take advantage from message passing.

If I won't be able to use this approach, I will use some memory shared mechanism.

Just a question,in order to use the gr::flowgraph:connect(),I need to get the object flowgraph from the XML file situated in GRC,isn't it?

Il giorno gio 30 apr 2015 alle ore 13:48 Mostafa Alizadeh <address@hidden> ha scritto:

excuse me,

I'm seeing the new API 3.7.7 of GNURadio which is changed. The "connect" is a member of gr::flowgraph which connects both blocks' ports and message ports:

http://gnuradio.org/doc/doxygen/classgr_1_1flowgraph.html#af8678658129a819673a59555d030aaac

Best,

On Thu, Apr 30, 2015 at 4:15 PM, Mostafa Alizadeh <address@hidden> wrote:

Hi Marco, 

The top_block class has a member named: connect. You can use it in the main() to connect different blocks. However, if you want to dis/connect blocks within C++ blocks, you must pass top_block pointer to the class in some fashion. Once I did and I got errors because I didn't have accessed to the "connect" from within the block. 

I prefer to change your topology to refuse the need you've mentioned. Otherwise describe your problem with more details.

Best,

Mostafa

On Thu, Apr 30, 2015 at 3:43 PM, marco Ribero <address@hidden> wrote:

Hi all,

I have another question. How can I connect the input and output port of different blocks,from inside a C++ block? In the documentation I've only seen the msg_connect() for python

Thanks,

marco

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Department of Electrical Engineering

Aboureyhan Building

MMWCL LAB

Amirkabir University Of Technology

Tehran

IRAN

Tel: +98 (919) 158-7730

LAB: http://ele.aut.ac.ir/~mmwcl/?page_id=411

Homepage: http://ele.aut.ac.ir/~alizadeh/

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