Hey all,
I've been trying to get the embedded python block to work with my USRP
N310s, but I'm experiencing late packet errors.
My goal is to stream one channel of the N310 to a length 2^12 vector,
perform some fancy fance on the vector, then vector to stream to a file
sink. The problem: every time I run my basic python block I get late packet
errors (LLLLLLLLLLLLLLLLLLLLLLLL). Here's a bare bones python block code
that still gives me the error.
import numpy as np
from gnuradio import gr
class blk(gr.sync_block): # other base classes are basic_block,
decim_block, interp_block
"""Embedded Python Block example - a simple multiply const"""
def __init__(self, 4096): # only default arguments here
"""arguments to this function show up as parameters in GRC"""
gr.sync_block.__init__(
self,
name='Embedded Python Block', # will show
up in GRC
in_sig =[ (np.complex64,4096),(np.complex64,
4096)],
out_sig =[(np.complex64,4096),(np.complex64,
4096)]
)
def work(self, input_items, output_items):
"""example: multiply with constant"""
output_items[0][:] = input_items[0][:]
output_items[1][:] = input_items[1][:]
return len(output_items[0])
This code works when I make a synthetic example, but when I stream out of
the N310 it doesn't seem to work. Am I doing something wrong?
-Mark
--
Mark Wagner
University of California San Diego
Electrical and Computer Engineering
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