Re: [Discuss-gnuradio] Questions on writing your own block

[Karthik Vijayraghavan]

On Wed, Nov 19, 2008 at 10:08 AM, Jason Uher <address@hidden> wrote:
> Hey all,
>
>   I have written my own blocks in the past following the instructions
> at http://www.gnu.org/software/gnuradio/doc/howto-write-a-block.html
> and had success.  However, today I am trying to implement a copy of
> 'gr.mpsk_receiver_cc', so I made a new module and block
> 'ju.mpsk_receiver_cc', I believe I changed everything in the ac,h,cc,
> and i files necessary, but I get the following error when I try to run
> 'make check':
>
> ======================================================================
> ERROR: test_001_mpsk_receiver_cc (__main__.qa_ju)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>  File "./qa_ju.py", line 38, in test_001_mpsk_receiver_cc
>    receiver=ju.mpsk_receiver_cc(2, 0, 2, 2,0, 0, 0, 1, 0, 0, 0 )
> AttributeError: 'module' object has no attribute 'mpsk_receiver_cc'
>
> I do not get an error when I try to 'import ju' alone, so it seems as
> if the module has been created appropriately. But for some reason the
> mpsk receiver code did not get attached to it.  Here is the relevant
> portion of the ju.i file that I thought did the attaching:
>
> GR_SWIG_BLOCK_MAGIC(ju,mpsk_receiver_cc);
>
> ju_mpsk_receiver_cc_sptr ju_mpsk_receiver_cc ();
>
> class ju_mpsk_receiver_cc : public gr_block
> {
> private:
>  ju_mpsk_receiver_cc ();
> };
>
>
> What can I do to get gnuradio to recognize ju.mpsk_receiver_cc in
> addition to ju?
>
> Thanks
> Jason
>

Based on other blocks that I have seen shouldn't the word "make" be present.

ju_mpsk_receiver_cc_sptr  ju_make_mpsk_receiver_cc ();

Karthik