I do not believe that you want to encapsulate the call with [ ], even so there
may be an issue with that command. I am unsure what the issue is but when I
make the call:
in_sig = gr.io_signature(3,3, gr.sizeof_gr_complex)
The error message is: Can't create an instance of your block: object of type
'io_signature_sptr' has no len()
Instead try this:
in_sig = 3*[np.complex64],
Where 3 will end up being your variable for number of inputs.
Tim
On Thursday, February 4, 2021, 1:23:35 PM EST, George Edwards
<gedwards....@gmail.com> wrote:
Hi Tim,
Thanks for your suggestion! I just tried it and it does not work. The Python
OOT def __init__(self, ....) method requires that one fills in in_sig = xxx and
out_sig = xxx.I tried your suggestion above for variable number of inputs and
set:in_sig = [gr.io_signature(1, -1, gr.sizeof_gr_complex)]
and I leave the yml file as is when I had the static number of inputs (in_sig =
[complex64, complex64, complex64]) shown below inputs:- domain: stream
dtype: complex multiplicity: '3'It gives a TypeError: data type not
understoodI tried a bunch of combinations based on the above change you
suggested, but GRC kept failing when I tried to run it.!
Thanks again for your suggestion!Regards,George
On Thu, Feb 4, 2021 at 8:01 AM Tim Huggins <huggins.timo...@yahoo.com> wrote:
George,
I would recommend taking a look at some of the existing blocks that have
variable inputs to accomplish this (especially for the YML file). A YML example
for a variable input can be found here:
https://github.com/gnuradio/gnuradio/blob/master/gr-blocks/grc/blocks_multiply_xx.block.yml
I haven't run a test using this line in a python block yet, but two different
examples are shown below that I believe should work (or should with some minor
tweaks). The first doesn't limit the number of inputs while the second one does
(at 8).
gr.io_signature(1, -1, gr.sizeof_gr_complex)) gr.io_signature(1, 8,
gr.sizeof_float)I don't know if there is a complete python reference for
GNURadio 3.8, but this should be helpful to get you close as well:
https://www.gnuradio.org/doc/sphinx-v3.7.9.2/
Good luck,
Tim
On Thursday, February 4, 2021, 12:01:07 AM EST, George Edwards
<gedwards....@gmail.com> wrote:
Hi Gavin,
Thanks for the information!
Does this mean that if I wanted 3 inputs and 5 outputs and all floating point
values, then inside the Python code, I simply set in_sig = [numpy.float32]
out_sign = [numpy.float32]
And, in the yml file I set:inputs:- domain: stream dtype: float
multiplicity: '3'
outputs: - domain: stream dtype: float multiplicity:
'5'
Would this be correct?Thanks again for your help!
Regards,George
On Wed, Feb 3, 2021 at 5:26 PM Gavin Jacobs <apriljunk...@hotmail.com> wrote:
In 3.7, you would use the <nports> tag, but in 3.8 the trick to setting
multiple ins/outs in the YML file, is the keyword "multiplicity". You can see
the details of how to configure
here:https://wiki.gnuradio.org/index.php/YAML_GRC
| YAML GRC - GNU RadioStarting with release 3.8, YAML replaces XML as the file
format for GNU Radio Companion. This is triggered by switching from Cheetah to
Mako as the templating engine, since Cheetah does not support Python
3.wiki.gnuradio.org |
