It works now, thanks! It was a combination of a couple dumb errors on my part. One last thing, I was wondering if there was a way to change the length of output_items[0]? It is 4096 by default I believe. Thanks, Anisha
On Thu, Jul 19, 2012 at 2:13 PM, Josh Blum <j...@ettus.com> wrote: > > > On 07/18/2012 11:32 AM, Anisha Gorur wrote: > > Hello All, > > > > I've been attempting to create my own source block in Python. I have been > > reading the blocks coding guide here: > > > https://github.com/guruofquality/grextras/wiki/Blocks-Coding-Guide#wiki-work-operation-modes > , > > but so far my source only outputs zeros. > > An outline of my code is as follows: > > > > class constSource(gr.block): > > def __init__(self): > > gr.block.__init__(self, name = "signal source", in_sig = > > None,out_sig = [numpy.complex64]) > > > > def work(self, input_items, output_items): > > num_output_items = len(output_items[0]) > > > > #I put the code to create what I want to stream here, the code > > creates a numpy.complex64 array with a length of 32. I then return > > num_output_items > > > You didnt include the code, but I am guessing that you are not assigning > anything to the output vector? > > numpy array assignment look like this > output_items[0][some kind of index selection] = data > > Look closely at how the examples do this > > -josh > > > return num_output_items > > > > I then write my constSource block to a file and I try to see the output > of > > the file using a scope sink, but it is just a constant stream of zeros. > Am > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > -- Anisha Gorur Class of 2012 Electrical Engineering
_______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
