Re: [Discuss-gnuradio] Debugging printing GRC - E110

[Josh Blum]

On 10/22/2012 09:28 PM, Jose Torres Diaz wrote:
> Hi,
> 
> I've a kind of basic question, but it has taken me a lot of time to figure
> out. I made a signal processing chain of blocks (very simple in facts,
> generate PSDU then send as a message downstream, manipulate the content and
> count the number of message that I've received). In order to debug my
> blocks, in .cc files I'm using:
> 
>  std::cout << std::endl << "running routine in BLOCK 1" << std::endl;
> 
> I populated my blocks with several messages, so I know what is going on
> every time. I can see the messages printed out in GRC (using NO Gui
> options). All the messages are correctly displayed, so I assumed that is
> running OK. Then, I generated the top_block.py file and put into the E110.
> When I run the top_block.py, I see only this:
> 
> python top_block.py
> linux; GNU C++ version 4.5.3 20110311 (prerelease); Boost_104500;
> UHD_003.004.003-1-g64d15538
> 
> Press Enter to quit: gr_block_executor: source <gr_block uhd st2 (2)>
> produced no output.  We're marking it DONE.

I think its just a gnuradio version thing. We *just* recently made a
change to work functions can return without producing samples. I
mentioned this in the other thread.

Seriously though, if you are just doing message passing stuff, and you
are having issue w/ returning from work. Dont return. Just dont do it.
Either block on pop_msg_queue or spin on whatever your function needs to
check.

The message passing is completely implemented outside of the scheduler.
So this is one of the downsides for now. In future endeavors, this will
be smart and integrated, and doing things like return from work will not
be an issue.

-josh

> Thanks a lot for your help,
> 
> Jose
> 
> 
> 
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>