[Discuss-gnuradio] Block keeps buffering data

[Wolfgang Nagele]

Hi,

I've written a Python block to feed some binary data into my QPSK
transmission. This block is supposed to grab the data according to the
1200 baud rate I have set up for the transmission. Well, so I thought.

GNU Radio keeps calling the work() function inside the block even
though the upstream flowgraph does not need the data yet. This results
in my block providing too much stale buffered data.

Is there a way to make the block work() function only being called
when the connected block really requests data? I thought I could use a
Throttle block but that does nothing either.

Suggestions?

Thanks,
Wolfgang