Hi Volker - Just to clarify: You've added an -optional- input async message port to a block that currently does just streaming. If you -do not- try to connect to this new port, then everything works as desired & as before. If you -do- try to connect to the port then you get the runtime error "insufficient connected output ports (1 needed, 0 connected)". Yes?
"Once upon a time" ... there was, and as it turns out still is (just tried using the current GIT master of GR), a bug in the code that handles connections for mixed streams and -input- async messages, which results in the runtime error you're encountering. I can provide a very simplified OOT that shows this error; I tried to track it down once but got sidetracked & never figured it out. Maybe I'll give it a go again this coming week ... or, maybe you can? Sorry for the bad news! - MLD On Fri, Jul 20, 2018, at 6:28 AM, Volker Schroer wrote: > Hi, > > I'm trying to add an message port to my working oot module fcdproplus > to be able to control the frequency by an message from a qtgui sink. > > I used the analog signal source as guide and implemented a message sink > in the grc description, registered the in port, and defined a handler > function like described in the tutorial. > > I can run my example of a simple fm receiver as before, but when I > connect the message out port of a qtgui sink to my message in port of my > oot block, > > I get the following error message: > > > ./FMRadio.py > INFO: Audio source arch: alsa > Funcube Dongle Pro+ found as: plughw:3,0 > Dongle sucessfully initialized > Result of Action :+++++ > FCDAPP 20.03 > Lna gain enabled > Mixer gain enabled > If gain set to: 10 > Set Frequency to: 94.3 KHz, corrected to: 94300 Khz > INFO: Audio sink arch: alsa > Traceback (most recent call last): > File "./FMRadio.py", line 277, in <module> > main() > File "./FMRadio.py", line 266, in main > tb.start() > File > "/usr/local/gnuradio/lib64/python2.7/site-packages/gnuradio/gr/ > top_block.py", > line 109, in start > top_block_start_unlocked(self._impl, max_noutput_items) > File > "/usr/local/gnuradio/lib64/python2.7/site-packages/gnuradio/gr/ > runtime_swig.py", > line 5678, in top_block_start_unlocked > return _runtime_swig.top_block_start_unlocked(r, max_noutput_items) > RuntimeError: fcdproplus(3): insufficient connected output ports (1 > needed, 0 connected) > > These are the connections: > > > ################################################## > # Connections > ################################################## > self.msg_connect((self.qtgui_sink_x_0, 'freq'), > (self.fcdproplus_fcdproplus_0, 'freq')) > self.connect((self.analog_fm_demod_cf_0, 0), > (self.audio_sink_0, 0)) > self.connect((self.analog_fm_demod_cf_0, 0), > (self.audio_sink_0, 1)) > self.connect((self.fcdproplus_fcdproplus_0, 0), > (self.low_pass_filter_0, 0)) > self.connect((self.fcdproplus_fcdproplus_0, 0), > (self.qtgui_sink_x_0, 0)) > self.connect((self.low_pass_filter_0, 0), > (self.analog_fm_demod_cf_0, 0)) > > If I remove the line > > self.msg_connect((self.qtgui_sink_x_0, 'freq'), > (self.fcdproplus_fcdproplus_0, 'freq')) > > > from my python script he error message disappears. > > What am I doing wrong? > > > Any help is appreciated. > > -- Volker > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
