Hi Lannan -
Once again, please do NOT send me private email. Send all replies to
discuss-gnuradio@gnu.org
gr-iio is NOT part of gnuradio radio - it just uses gnuradio, that is,
it's a OOT module.
You MUST contact the author of the gr-iio module if you're having
trouble with it. I don't know anything about gr-iio.
-- Cinaed
//
On 6/17/20 3:36 PM, lannan jiang wrote:
Hi Cinaed,
Thank you so much for your response.
I realized that QAM mod and demod blocks were depreciated, so I
tried contellation modulator instead. However, the error i get becomes
the following:
/Traceback (most recent call last):
/
/ File "/home/lannanjiang/gr-iio/My_Radio/QAMmodem.py", line 209, in
<module>
/
/ main()
/
/ File "/home/lannanjiang/gr-iio/My_Radio/QAMmodem.py", line 187, in main
/
/ tb = top_block_cls()
/
/ File "/home/lannanjiang/gr-iio/My_Radio/QAMmodem.py", line 138, in
__init__
/
/self.digital_constellation_modulator_1 = digital.generic_mod(
/
/ File
"/usr/lib/python3/dist-packages/gnuradio/digital/generic_mod_demod.py",
line 115, in __init__
/
/ self.pre_diff_code = pre_diff_code and
self._constellation.apply_pre_diff_code()
/
/AttributeError: 'int' object has no attribute 'apply_pre_diff_code'/
/
/
Additionally, python3 files were generated when I run my flow graphs,
so i think that the compatibility with GNU 3.8 is not an issue?
Thanks in advance,
Lannan Jiang
------------------------------------------------------------------------
*From:* Discuss-gnuradio
<discuss-gnuradio-bounces+jln925=live....@gnu.org> on behalf of Cinaed
Simson <cinaed.sim...@gmail.com>
*Sent:* Wednesday, June 17, 2020 5:39 PM
*To:* discuss-gnuradio@gnu.org <discuss-gnuradio@gnu.org>
*Subject:* Re: AttributeError: module 'gnuradio.digital.qam' has no
attribute 'qam_mod'
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
