[Discuss-gnuradio] Issues with custom message source block

[Chris Reffett]

Hi all,


In the project I'm working on, I'm trying to step through a list of 
frequencies and scan them, with the set of frequencies and the step 
interval as configurable options. As part of this, I'm trying to make a 
message source block that does the frequency stepping (i.e. it takes the 
list of frequencies and the step interval as parameters, and every 
$step_interval it puts out a message with the new frequency). I figured 
this would be pretty simple, and implemented it in Python. Problem 
is...it doesn't do anything. I can debug-print from __init__ and see 
that variables are getting set, but it seems like work() is never 
getting called (debug print messages never print, and I don't see any 
messages coming out of the block). Am I missing something to make the 
block actually do its work? The block is attached.

Of course, if there's a better way to do the frequency stepping, I'm all 
ears (though note that I'm using the osmocom source block which doesn't 
have a control message port, which adds to the challenge).


Thanks,

Chris Reffett

channel_cycler.py
Description: Text document