Gr.and_const_ss Overflow error with values over 0x7FFF?

Hi All,

Does anyone have any idea what’s happening here? It seems like
gr.and_const_ss(short k) wont accept any values of k greater than
0x7fff.
It’s a bit of a problem for using gr-gpio where the use case would be
gr.and_const_ss(0xEFFF) to get only the analog portion of the samples.

Executing z = gr.and_const_ss(0x7fff) works fine
but z = gr.and_const_ss(0x8000) results in:

z = gr.and_const_ss(0x8000)
Traceback (most recent call last):
File “”, line 1, in
File
“/usr/local/lib/python2.6/dist-packages/gnuradio/gr/gnuradio_swig_py_gengen.py”,
line 1636, in and_const_ss
return _gnuradio_swig_py_gengen.and_const_ss(*args, **kwargs)
OverflowError: in method ‘and_const_ss’, argument 1 of type ‘short’

I’ve git pulled with no improvement and I’m running Ubuntu 10.04 LTS.
This issue can be reproduced using either an interactive Python console
or by running gnuradio/gr-gpio/src/python/gpio_rx_sfile.py

Also multiply_const_ss is doing the same thing.

Maybe I need to raise this as an issue?

Thanks for any help,
Drew

On Tue, May 11, 2010 at 09:12:40AM +1200, Drew R. wrote:

or by running gnuradio/gr-gpio/src/python/gpio_rx_sfile.py

Also multiply_const_ss is doing the same thing.

Maybe I need to raise this as an issue?

Thanks for any help,
Drew

It’s a side effect of the conversion between Python and C++.

I just pushed an update to master that gives you a way to deal with
what SWIG thinks are hex values that won’t fit in a short.

[[email protected] ~]$ python
Python 2.6.2 (r262:71600, Jan 25 2010, 18:46:47)
[GCC 4.4.2 20091222 (Red Hat 4.4.2-20)] on linux2
Type "help", "copyright", "credits" or "license" for more 

information.
>>> from gnuradio import gr, gru
>>> z=gr.and_const_ss(gru.hexshort(0x8000))
>>> gru.hexshort(0x8000)
-32768
>>> gru.hexshort(0xFFE0)
-32

Eric

On Tue, May 11, 2010 at 09:12:40AM +1200, Drew R. wrote:

or by running gnuradio/gr-gpio/src/python/gpio_rx_sfile.py

Also multiply_const_ss is doing the same thing.

Maybe I need to raise this as an issue?

Thanks for any help,
Drew