Hi Patrick, the typical problem with C++ blocks is that people add public methods to their _impl, but forget to declare these same methods in their public non-impl class. Have you done the same expand magic with the header in your include/CMakeLists.txt?
Best regards, Marcus On 07/06/2015 04:09 AM, Patrick Sathyanathan wrote: > Hi, > > I have worked my way through the Guided Tutorials on gnuradio.org. I have > written OOT blocks in Python and managed to expose some set methods in the > block as callbacks. Now I have written an OOT C++ block sweeper_cpp_f and I > want to expose a couple of setter methods in my block's class as callbacks > that can be invoked from Python. Initially I just defined the methods in my > sweeper_cpp_f_impl.cc file and added the following to the matching XML file: > > <callback>set_direction($direction)</callback> > <callback>set_trigger_level($trigger_level)</callback> > > This builds fine and I am able to use the block in a GRC flow-graph. But at > runtime when one of the above methods is invoked as a result of GUI input I > get an error message: > > File "/home/wpats/ettus/grc/new_sweep_cpp.py", line 141, in > set_variable_chooser_direction > > self.tutorial_sweeper_cpp_f_0.set_direction(self.variable_chooser_direction) > AttributeError: 'sweeper_cpp_f_sptr' object has no attribute 'set_direction' > > I looked at built in module sig_source_X_impl.h.t and sig_source_X_impl.cc.t > (this is the analog signal source block) in gr-analog as an example for what > I am trying to accomplish. I converted my sources into a similar format and > modified the CMakeLists.txt in the .../gr-tutorial/lib directory to add: > > ######################################################################## > # Invoke macro to generate various sources and headers > ######################################################################## > include(GrMiscUtils) > GR_EXPAND_X_CC_H(tutorial sweeper_cpp_X_impl f) > > This again builds fine after I edit the generate_helper.py generated script > to find an import module. I assumed that the above would do the necessary > magic to generate the wrappers for my callback methods but no such luck. I > still get the attribute error when invoking my C++ method. > > What is the right way to do this ? Any help/suggestions/pointers would be > appreciated. I can't be the first one to try to do this seemingly simple > task... > > Thanks, > > --Patrick > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
