[Discuss-gnuradio] creating and importing a new python block

[Jorge Gallo]

Hello,

I tried to build my first custom block.
Very easy. It just generates one tune msg every 5 seconds.

I followed steps of writing an OOT block in python:

http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModules#Tutorial-3-Writing-a-signal-processing-block-in-Python


% gr_modtool super_msg_generator
super_msg_generator % gr_modtool add -t sync -l python generador


Inside python/generador.py my code:

#!/usr/bin/env python
import numpy
from gnuradio import gr
import time
class generador(gr.sync_block):
    def __init__(self):
        gr.sync_block.__init__(self,
            name="generador"
            #,in_sig=[],
            #,out_sig=[]
        )
    self.message_port_register_out(pmt.intern("ppm"))

    def work(self):
    while True:
        time.sleep(5)
        self.message_port_pub(pmt.intern("ppm"), pmt.to_pmt("freq",
float(915e6)))
        time.sleep(5)
        self.message_port_pub(pmt.intern("ppm"), pmt.to_pmt("freq",
float(918e6)))

How can I check a block with no inputs and no outputs?


After that I created a build folder in gnuradio/gr-super_msg_generator

cmake ../
make
sudo make install
sudo ldconfig


I thought that was everyhting.


However when trying to setup a python flowgraph the code cannot import the
new block.

tune_msg.py::
#!/usr/bin/env python
from gnuradio import blocks
from gnuradio import eng_notation
from gnuradio import gr
from gnuradio import uhd
from gnuradio import super_msg_generator
.....


output when executing: $ python tune_msg.py
linux; GNU C++ version 4.7.2; Boost_104900; UHD_003.008.001-42-g8c87a524

Traceback (most recent call last):
  File "tune_msg.py", line 12, in <module>
    from gnuradio import super_msg_generator
ImportError: cannot import name super_msg_generator



There is something missing but I do not figure it out. Any help please?

Regards,

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