jmdaniel wrote: > Hi, > > I've got gnuradio up and running and am now trying to get a better > understanding of how to use it before beginning more involved > projects. I am trying to write a py script that displays an oscope > from a PCI-DAS4020/12. mc4020_fft.py runs and displays the > excpected results. Here's the code that I've peiced together.
> File "/usr/local/lib/python2.3/site-packages/gnuradio/gr/basic_flow_ > graph.py", line 127, in _connect_prim > self._check_type_match (src_endpoint, dst_endpoint) > File "/usr/local/lib/python2.3/site-packages/gnuradio/gr/basic_flow_ > graph.py", line 238, in _check_type_match > raise ValueError, 'source and destination data sizes are different ' > ValueError: source and destination data sizes are different > > > I would greatly appreciate any help with understanding what is > wrong here and how to fix it. The 4020 returns 16 bit signed integers (shorts). The scopesink is expecting floats. You need to put a gr.short_to_float () block in between them. Matt _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
