Hi Travis,
stop() is called on all gr::blocks in your flow graph when you change
(ok, even when you just set it to the old index) selector's
configuration, because it reconfigures the flow graph internally,
meaning that it calls lock() and unlock() on a hier block, which stop()s
the parent hier_block, or top_block if it's already the highest level of
encapsulation.
So that is correct behaviour, in principle. However, message strobe
doesn't seem to be able to get up again:
bool
message_strobe_impl::stop()
{
// Shut down the thread
d_finished = true;
d_thread->interrupt();
d_thread->join();
return block::stop();
}
since start() doesn't re-set d_finished, we now know what needs to be
done to correct this:
move the setting of d_finished from the constructor to start().
I have a fix for this; for me, it works with your flow graph. If you
want to try:
https://github.com/marcusmueller/gnuradio/tree/message_strobe_fix_restartable
Best regards,
Marcus
On 04/18/2015 11:11 PM, Travis Collins wrote:
> I'm having a problem with the Message Strobe block. I have a simple
> flowgraph, which can be found here: http://pastebin.com/WCa5npiP
>
> There are two independent dataflows in the flowgraph:
> Flow 1:
> noise source -> throttle -> selector(w /wx chooser) -> null sink
>
> -> null sink
> Flow 2:
> message strobe(w /wx chooser) -> message debug
>
> Both the "message" in the message strobe and output index of the
> selector are wx chooser controlled.
>
> I am able to change the "message" fine, but when I change the output
> index of the selector of a running flow, the stop method of the
> message strobe gets called.
>
> Why is this happening and can I prevent it? I want the messages to
> continue.
>
> Im using GNU-Radio: 3.7.6.1 (built from "build-gnuradio")
>
>
> -Travis
>
>
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