I tryed your code, but it's not working. I get a lot of errors.
This is the complete program i have written(I've modified the
multi-fft.py file with the lines you wrote me).
Can you explain what this line does:
rx_subdev = self.rx_src.db[0]+self.rx_src.db[1]? The numbers 0 and 1
refer to inputs from the same Basic RX or to different Basix Rx boards?
I have connected only one Basic Rx.
Thank you very much for your help,
Diana
#!/usr/bin/env python
from gnuradio import gr, gru, eng_notation
from gnuradio import usrp
from gnuradio.eng_option import eng_option
from gnuradio import eng_notation
from gnuradio import optfir
from optparse import OptionParser
from gnuradio.wxgui import stdgui, fftsink2, waterfallsink, scopesink,
form, slider
import wx
from usrpm import usrp_dbid
import time
import os.path
import sys
class my_graph(stdgui.gui_flow_graph):
def __init__(self, frame, panel, vbox, argv):
stdgui.gui_flow_graph.__init__(self)
self.frame = frame
self.panel = panel
usage="%prog: [options]"
parser = OptionParser (option_class=eng_option,usage=usage)
#parser.add_option("-S", "--subdev", type="subdev", default=(0,
None),
# help="select USRP Rx side A or B
(default=A)")
parser.add_option("-d", "--decim", type="int", default=128,
help="set fgpa decimation rate to DECIM
[default=%default]")
parser.add_option("-f", "--freq", type="eng_float",
default=10.7e6,
help="set frequency to FREQ
[default=%default])", metavar="FREQ")
parser.add_option("-g", "--gain", type="eng_float", default=0,
help="set gain in dB [default=%default]")
parser.add_option("-F", "--filter", action="store_true",
default=True,
help="Enable channel filter")
(options, args) = parser.parse_args()
if len(args) != 1:
parser.print_help()
raise SystemExit,1
n_chans = 2
fftsize_N=512
if options.filter:
sw_decim = 4
else:
sw_decim = 1
self.rx_src = usrp.source_c()
if self.rx_src.nddc() < n_chans:
sys.stderr.write('This code requires an FPGA build with %d
DDCs. This FPGA has only %d.\n' % (n_chans, self.rx_src.nddc()))
raise SystemExit,1
if not self.rx_src.set_nchannels(n_chans):
sys.stderr.write('set_nchannels(%d) failed\n' % (n_chans,))
raise SystemExit,1
rx_rate = self.rx_src.adc_freq() / self.rx_src.decim_rate()
print "USB data rate = %s" %
(eng_notation.num_to_str(rx_rate),)
print "Scope data rate = %s" %
(eng_notation.num_to_str(rx_rate/sw_decim),)
rx_subdev = self.rx_src.db[0]+self.rx_src.db[1]
self.rx_src.set_mux(gru.hexint(0xf1f0f3f2))
deinterleaver = gr.deinterleave(gr.sizeof_gr_complex)
for i in range(nchan):
scope = fftsink.fft_sink_c(self, panel,
sample_rate=input_rate/sw_decim,
title="Input %d" % (i,),
ref_level=80, y_per_div=20)
vbox.Add(scope.win, 10, wx.EXPAND)
for i in range(n_chans)
self.rx_src_fft0 =
fftsink2.fft_sink_c(panel,title="ChRXB-A",fft_size=fftsize_N,sample_rate=rx_rate/sw_decim)
vbox.Add(self.rx_src_fft0.win,10,wx.EXPAND)
for i in range(n_chans)
self.rx_src_fft1 =
fftsink2.fft_sink_c(panel,title="ChRXB-B",fft_size=fftsize_N,sample_rate=rx_rate/sw_decim)
vbox.Add(self.rx_src_fft1.win,10,wx.EXPAND)
self.connect(self.rx_src,deinterleaver)
self.connect((deinterleaver,0),self.rx_src_fft0)
self.connect((deinterleaver,1),self.rx_src_fft1)
chan_filt_coeffs = optfir.low_pass (1, # gain
rx_rate, # sampling rate
80e3, # passband
cutoff
115e3, # stopband
cutoff
0.1, # passband
ripple
60) # stopband
attenuation
#print len(chan_filt_coeffs)
self.set_gain(options.gain)
self.set_freq(options.freq)
def set_gain(self, gain):
for i in range(len(self.subdev)):
self.rx_subdev[i].set_gain(gain)
#Tune the receiver
def set_freq(self, target_freq):
ok = True
for i in range(len(rx_subdev)):
r = self.rx_src.tune(rx_subdev[i]._which, i, rx_subdev[i],
target_freq)
if not r:
ok = False
print "set_freq: failed to set subdev[%d] freq to %f" %
(i, target_freq)
return ok
def main ():
app = stdgui.stdapp(my_graph, "Multi Scope", nstatus=1)
app.MainLoop()
if __name__ == '__main__':
main ()
Karthik Vijayraghavan wrote:
> On Wed, Apr 23, 2008 at 5:38 AM, Diana Iosifescu <[EMAIL PROTECTED]>
> wrote:
>> Diana
>> --
>> Posted via http://www.ruby-forum.com/.
>
> I recently finished doing exactly this. The following code works for
> me. I modified this from the multi_fft example file.
>
> n_chans = 2;
> self.rx_src = usrp.source_c()
> rx_subdev = self.rx_src.db[0]+self.rx_src.db[1]
> self.rx_src.set_mux(gru.hexint(0xf1f0f3f2))
> deinterleaver = gr.deinterleave(gr.sizeof_gr_complex)
> self.rx_src_fft0 = fftsink2.fft_sink_c(panel,title="Ch
> RXB-A",fft_size=fftsize_N,sample_rate=rx_rate/sw_decim)
> self.rx_src_fft0 = fftsink2.fft_sink_c(panel,title="Ch
> RXB-B",fft_size=fftsize_N,sample_rate=rx_rate/sw_decim)
>
> self.connect(self.rx_src,deinterleaver)
> self.connect((deinterleaver,0),self.rx_src_fft0)
> self.connect((deinterleaver,1),self.rx_src_fft1)
> vbox.Add(self.rx_src_fft0.win,10,wx.EXPAND)
> vbox.Add(self.rx_src_fft1.win,10,wx.EXPAND)
>
> #Tune the receiver
> for i in range(len(rx_subdev)):
> r = self.rx_src.tune(rx_subdev[i]._which,
> rx_subdev[i],carrier_freq)
> if not r:
> print "set_freq: failed to set subdev[%d] freq to %f" %
> (i, carrier_freq)
>
>
> RXB-A appears on (deinterleaver,0) ad RXB-B appears on
> (deinterleaver,1). If you are using RXA then you might want to replace
> the mux value by something like 0xf3f2f1f0.
>
> Regards,
> Karthik
>
> --
> www.stanford.edu/~karthikv
--
Posted via http://www.ruby-forum.com/.
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