Hi all,
I am trying to send a messsage from a Python block (of type gr.sync_block) to
'osmocom source', so that I can change the frequency of the receiver.
First, I have in the Python block the command
self.message_port_register_out(pmt.intern('msg_out'))
and then in the work-function of the Python block I give
self.freq = 80e6
key = pmt.intern("freq")
value = pmt.to_pmt(self.freq)
self.message_port_pub(pmt.intern('msg_out'), pmt.cons(key, value))
Then, if I connect the 'msg_out' port of the Python block to 'print' port of
the
'Message debug' block, it prints
******* MESSAGE DEBUG PRINT ********
(freq . 8e+07)
But if I connect the 'msg_out' port to 'command' port of the 'osmocom source'
block, I get the following error:
--------
Could not find port: command in:
Traceback (most recent call last):
File "/home/kimmo/Hydra-plain-fft/Hydra_options.py", line 718, in <module>
main()
File "/home/kimmo/Hydra-plain-fft/Hydra_options.py", line 696, in main
tb = top_block_cls()
File "/home/kimmo/Hydra-plain-fft/Hydra_options.py", line 410, in __init__
self.msg_connect((self.epy_block_2, 'msg_out'), (self.osmosdr_source_0,
'command'))
File "/usr/lib/python3/dist-packages/gnuradio/gr/hier_block2.py", line 60, in
wrapped
func(self, src.to_basic_block(), srcport, dst.to_basic_block(), dstport)
File "/usr/lib/python3/dist-packages/gnuradio/gr/hier_block2.py", line 132,
in msg_connect
self.primitive_msg_connect(*args)
File "/usr/lib/python3/dist-packages/gnuradio/gr/runtime_swig.py", line 4541,
in primitive_msg_connect
return _runtime_swig.top_block_sptr_primitive_msg_connect(self, *args)
RuntimeError: invalid msg port in connect() or disconnect()
--------
In the genereted Python file there are the following commands which are related
to
message passing:
self.msg_connect((self.epy_block_2, 'msg_out'), (self.blocks_message_debug_0,
'print'))
self.msg_connect((self.epy_block_2, 'msg_out'), (self.osmosdr_source_0,
'command'))
I am using Gnuradio 3.8.1.0 (Python 3.8.10) in Ubuntu 20.04.3 LTS
cheers, Kimmo
