On 04/23/2013 02:06 PM, Nelson Pina wrote:
Hi everyone,
I have been trying to make a gnuradio out-of-the-tree block that is
able to control the four GPIOs, currently attached to LED's, of the
SBX daughter-boards working with an USRP motherboard.
I wonder if anyone can help me on this, making a functional draft code
of such a block:
1 integer input - that will define the state of the GPIOs
1 parameter - to define the motherboard serial number
I believe that for people with knowledge of C++, and Python this is a
very simple module, unfortunately that is not my area since I'm a
hardware engineer and I only work with C.
I tried some approaches, using the gr_modtool to create the module,
but it always fails with GRC running errors like:
**********************
Traceback (most recent call last):
File
"/home/to-nelsonpina/Desktop/locus_gnuradio/GRC_files/top_block.py",
line 16, in <module>
import gpio
File "/usr/local/lib/python2.7/dist-packages/gpio/__init__.py", line
45, in <module>
from gpio_swig import *
File "/usr/local/lib/python2.7/dist-packages/gpio/gpio_swig.py",
line 26, in <module>
_gpio_swig = swig_import_helper()
File "/usr/local/lib/python2.7/dist-packages/gpio/gpio_swig.py",
line 22, in swig_import_helper
_mod = imp.load_module('_gpio_swig', fp, pathname, description)
ImportError: /usr/local/lib/libgnuradio-gpio.so: undefined symbol:
_ZN3uhd4usrp10multi_usrp4makeERKNS_13device_addr_tE
*************************
This is most likely a failure to define the SWIG header file
appropriately, or possibly you've _declared_ a class that SWIG found but
you haven't _defined_ it. Finally because I just found this out the hard
way, if you're using the new code structure with block.h, block_impl.h,
and block_impl.cc, be aware that block.h needs to declare an abstract
class and its method declarations need to be pure virtual. block_impl.h
declares the concrete class and block_impl.cc provides concrete method
definitions.
If you want to unmangle that symbol, type this:
c++filt _ZN3uhd4usrp10multi_usrp4makeERKNS_13device_addr_tE
I will appreciate all the help I can get from you guys.
Best regards,
__
*Nelson Pina*
Product Developer
Hardware
*n.p...@tomorrow-options.com <mailto:n.p...@tomorrow-options.com>*
*T* +351 220 301 596 (PT)
*T* +44 114 213 2712 (UK)
*www.tomorrow-options.com <http://www.tomorrow-options.com/>
*Porto // Portugal
Sheffield // United Kingdom
<http://www.tomorrow-options.com/><http://www.linkedin.com/company/tomorrow-options><http://www.facebook.com/pages/Porto-Portugal/Tomorrow-Options/214846405104><http://twitter.com/TomorrowOptions><http://www.youtube.com/user/TomorrowOptionsTube>
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
