-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Tom,
> Have been trying to write a block in Python. Did not use the > modtool.py, since my understanding is it may not yet support that. Luckily, you're wrong. gr_modtool -l python add works like a charm. > The block has only one output, no inputs. Also wrote the > corresponding XML file. the block shows up correctly in GRC when I > select it and add it to the flowgraph. It's a source :) > I've defined the output signature in the work function ( 1, 1, > gr.sizeof_float). My work function writes to output_items[0][ some > indexes] and returns with a count of the number of written output > items. very well :) > Initially I derived the block from gr.block, but it complained > about no connection to the output, so I changed it to derive from > gr.hier_block2. When running the flowgraph with my block in it, > gnuradio complains that there is no output connection inside my > block. Oh, that's wrong. A hier_block is a hierarchical block, that is, only a set of connections between other blocks and maybe some logic. You can't have "work" in a hier_block; well, you can, but it won't be called by the GNU Radio scheduler. > > Any advice? A hier block can't be used here. I don't know about your flowgraph, but: did you really connect your gr.block-subclass' output to let's say a null sink or a vector sink? My advice is: Use gr_modtool, it really makes life easier and failsafer. Greetings, Marcus > > -- Tom, N5EG > > > > _______________________________________________ Discuss-gnuradio > mailing list [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJS6fumAAoJEAFxB7BbsDrLQmMIAIEgeZgSM8UI8BfUyMnzoJWb nc3oczsdrevBnprIsjAOfXgReU7gwYexASRBoEO4WFSsriVC5lf1bRMK6xRmbV+v kaVvrGWurIHWrkt0NWtktwUc0oWWE1fUTvk146V1LR41nUg6vYIw9qMwM3rwf2zV MeovU47+tsh3scyE9CEnGJxxiB7NGv7EaQ5EiuSXIFv+I8zrq/X2kFkX6K77oyhS VUmVkOS4U+fYaMzk90Efk06ehm5yaRrrDQoZq0oNUeRTyLYzz7rLSmI2wPOvBYeW uIhlHYTC0EYYmJy3WK+KggzhfUrw9yE547SkqUnKm2RFXxwfkzJqCwl0hsJ/Z/g= =aQ50 -----END PGP SIGNATURE----- _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
