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
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
I missing a key part of creating a source block? Also, the reason I don't
use a file source is that the stream I am trying to create is dependent
upon the time of day, so pulling it from a file source will mean that it is
delayed somewhat. I will eventually want to transmit this data as well, not
just put it in a file sink.
Thanks,
Anisha
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