Hi Lannan - gr-iio is an OOT (Out Of Tree) module and not part of GNU
Radio. Unless someone on the list already has it working you're better
off contacting the author.
Also, I took a quick look at the the cmake module "GrPython.cmake" and
it appears to be searching for python2 so if it's not using python3 then
it's possible the gr-iio module may not play well with GNU Radio 3.8.
If you want you could post your GRC file, we can look at to see if there
any problems with flow but it's unlikely we can help you with gr-iio.
Under GNU radio 3.8, the QAM-mod and QAM-demod blocks have bee
depreciated- which means either they don't work correctly under 3.8 or
they can't be fixed to work under 3.8.
-- Cinaed
On 6/17/20 10:40 AM, lannan jiang wrote:
Hi everyone,
I am still pretty new to GNU Radio, and I am trying to use the
'QAM-mod' block in GRC. However, I have encountered the following
error and I am not sure how to fix this:
error message:
/Traceback (most recent call last):
/
/ File "/home/lannanjiang/gr-iio/My_Radio/QAMmodem.py", line 214, in
<module>
/
/ main()
/
/ File "/home/lannanjiang/gr-iio/My_Radio/QAMmodem.py", line 192, in main
/
/ tb = top_block_cls()
/
/ File "/home/lannanjiang/gr-iio/My_Radio/QAMmodem.py", line 140, in
__init__
/
/ self.digital_qam_mod_2 = digital.qam.qam_mod(
/
/AttributeError: module 'gnuradio.digital.qam' has no attribute 'qam_mod'/
The following is what I typed to install gnuradio and gr-iio on a
64bit guest machine, Ubuntu 20.04 LTS.
/ sudo apt install gnuradio
/
/ sudo apt install swig/
/ sudo apt install liborc-dev/
/ git clone -b upgrade-3.8
https://github.com/analogdevicesinc/gr-iio.git/
/ cd gr-iio/
/ cmake ./
/ make/
/ sudo make install/
/ cd ../
/ sudo ldconfig /
I have looked up similar questions asked by others but I was unable to
resolve this error.
By the way, I was able tp use FM mod and demod blocks GNU radio,
but I keep getting the "no attribute error" for QAM mod and
constellation modulator blocks.
Please help me with this, any suggestions will be appreciated!
Thanksin advance
Lannan Jiang
