Hi Kimmo, as far as I know, the gr-osmosdr blocks don't have such a message port, and a `git grep "[\"']command[\"']" does confirm that suspicion.
Best regards, Marcus On 04.02.22 16:00, Kimmo Lehtinen wrote:
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_connectreturn _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
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