Josh Blum wrote:
Can you post the python code that GRC generated for the flow graph?
The python code is attached to this e-mail. Is it possible to see the
problem from the python file?
side_b is a keyword argument in __init__, I am afraid that you may have
multiple versions of gnuradio installed.... What version of gnuradio are
you running?
I did try to look around (and use "locate") without finding several
parallel versions of GNU Radio installed. I went on deleting all GNU
Radio related in "/Library/Python/2.5/site-packages/" and
"/usr/local/share/" before reinstalling from the latest SVN revision
(10443).
I am not able to test with the USRP again until to morrow, so I can not
confirm whether or not this made any difference, but I did not see
anything that to me indicated several versions (I may be wrong).
also see:
http://gnuradio.org/trac/browser/gnuradio/trunk/grc/src/grc_gnuradio/usrp
You have to do something like, create one usrp source, create 2
subdevices, and deinterleave the usrp stream into 2 streams. See the
link posted above to get an idea.
I have read some of the files in the above URL, and will give doing it
manually a try to morrow if the problem with the dual-sink persists.
However I suspect that the dual source will be preferable if possible,
as it will be more readable and easy to implement.
- Einar
#!/usr/bin/env python
##################################################
# Gnuradio Python Flow Graph
# Title: untitled
# Author: unknown
# Description: gnuradio flow graph
# Generated: Mon Feb 16 19:59:41 2009
##################################################
from gnuradio import gr
from grc_gnuradio import usrp as grc_usrp
from grc_gnuradio import wxgui as grc_wxgui
import wx
class top_block(grc_wxgui.top_block_gui):
def __init__(self):
grc_wxgui.top_block_gui.__init__(
self,
title="GRC - Executing: untitled",
)
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 32000
##################################################
# Blocks
##################################################
self.gr_complex_to_real_0 = gr.complex_to_real(1)
self.gr_complex_to_real_1 = gr.complex_to_real(1)
self.gr_float_to_complex_0 = gr.float_to_complex()
self.gr_vector_sink_x_0 = gr.vector_sink_c()
self.usrp_dual_source_x_0 = grc_usrp.dual_source_c(which=0,
side_a='A', rx_ant_a='RXA', side_b='A', rx_ant_b='RXB')
self.usrp_dual_source_x_0.set_decim_rate(64)
self.usrp_dual_source_x_0.set_frequency_a(0, verbose=True)
self.usrp_dual_source_x_0.set_frequency_b(0, verbose=True)
self.usrp_dual_source_x_0.set_gain_a(1)
self.usrp_dual_source_x_0.set_gain_b(1)
##################################################
# Connections
##################################################
self.connect((self.usrp_dual_source_x_0, 0),
(self.gr_complex_to_real_0, 0))
self.connect((self.gr_complex_to_real_0, 0),
(self.gr_float_to_complex_0, 0))
self.connect((self.usrp_dual_source_x_0, 1),
(self.gr_complex_to_real_1, 0))
self.connect((self.gr_complex_to_real_1, 0),
(self.gr_float_to_complex_0, 1))
self.connect((self.gr_float_to_complex_0, 0),
(self.gr_vector_sink_x_0, 0))
def set_samp_rate(self, samp_rate):
self.samp_rate = samp_rate
if __name__ == '__main__':
tb = top_block()
tb.Run()
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