Hi, all
I try to re-structure the osmo-tetra to work with GNU Radio 3.7. The
osmo-tetra is based on GNU Radio 3.6.
The original code has tuner, resampler, demodulater three modules
which connected sequentially.
The resampler is based on function pfb_decimator_ccf which changes
from 3.6 to 3.7. The pfb_decimator_ccf only take single parameter decimation,
which changes in 3.7,
After reading the manual of 3.7, I made following changes to the
python script :
Add a low-pass filter " taps = filter.firdes.low_pass_2(1, fs,
options.low_pass, options.low_pass * 0.2, attenuation_dB=ATT,
window=filter.firdes.WIN_BLACKMAN_hARRIS) "
Change "self.resamp = blks2.pfb_decimator_ccf(int(rerate)) " to " self.resamp
= filter.pfb_decimator.ccf(int(rerate), taps, 0) "
But error still occurs when connecting modules " self.connect(self.src,
self.tuner, self.resamp, self.demod, self.output) " :
Traceback (most recent call last):
File "./osmosdr-tetra_demod_fft.py", line 264, in <module>
tb.Run(True)
File
"/usr/local/lib/python2.7/dist-packages/grc_gnuradio/wxgui/top_block_gui.py",
line 82, in Run
self.Start(start, max_nouts)
File
"/usr/local/lib/python2.7/dist-packages/grc_gnuradio/wxgui/top_block_gui.py",
line 73, in Start
self.start()
File "/usr/local/lib/python2.7/dist-packages/gnuradio/gr/top_block.py", line
103, in start
top_block_start_unlocked(self._tb, max_noutput_items)
File "/usr/local/lib/python2.7/dist-packages/gnuradio/gr/runtime_swig.py",
line 4612, in top_block_start_unlocked
return _runtime_swig.top_block_start_unlocked(*args, **kwargs)
RuntimeError: pfb_decimator_ccf(13): insufficient connected input ports (5
needed, 1 connected)
Does it indicate pfb_decimator_ccf take 5 inputs ? It puzzled me.
Best Regards, Jiang Pin
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