Kieran Brownlees wrote:
Hello all,
I am not sure whether this is strange behaviour or I am misunderstanding
what you can do with hier_blocks.
Problem is best described with an example:
from gnuradio import gr
class h_block(gr.hier_block2):
def __init__(self):
gr.hier_block2.__init__(self,
"h_block",
gr.io_signature(1,1,gr.sizeof_float),
gr.io_signature(0,0,0))
hblock2 = h_block2()
self.connect(self, hblock2)
i would change this last line to:
self.connect(self, gr.kludge_copy(gr.sizeof_float), hblock2)
hier blocks dont like to connect their virtualized inputs and outputs
directly to other hier blocks. They require something substantial
in-between. Thats is why we have kludge_copy, which just takes data from
the h_block and passes it to the h_block2 input, just so long as the two
h_blocks dont have to communicate directly!
Im not sure if there is a ticket about this, maybe
http://gnuradio.org/trac/ticket/161 is related.
-Josh
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