Hello,
I just have the GNU Radio equipment setups and runs together with the Ubutun
8.10 with my Latitude D610 notebook.
I have successfully test and the GNU software is running properly. Still, I
have problem to run a code posted on-line by Elie Salameh. I typed and
copied the code exactly as what it is, but I still fail.
The error message said:
u...@usrp-laptop:~/gnuradio/gnuradio-examples/python/usrp$ ./gnu_fm2.py -l
2.plsNumber of items in list 3
/home/usrp/gnuradio/gnuradio-examples/python/usrp/se-exp-steve-fossett-21jan09_0.Mp3
/home/usrp/gnuradio/gnuradio-examples/python/usrp/se-tia-presidential-inaugurations-19jan09-CQ_0.Mp3
/home/usrp/gnuradio/gnuradio-examples/python/usrp/jan-24-09-AS-Paul-Bunyan_0.Mp3
Using TX d'board A: Flex 2400 Tx MIMO B
Traceback (most recent call last):
File "./gnu_fm2.py", line 132, in <module>
wfm_tx()
File "./gnu_fm2.py", line 85, in __init__
if not self.set_freq(options.freq):
File "./gnu_fm2.py", line 123, in set_freq
r = self.u.tune(self.subdev.which, self.subdev, target_freq)
File "/usr/local/lib/python2.5/site-packages/gnuradio/usrp/usrp_swig.py",
line 2688, in __tune
r = self._real_tune(chan, db, target_freq, tr)
File "/usr/local/lib/python2.5/site-packages/gnuradio/usrp/usrp_swig.py",
line 2089, in _real_tune
return _usrp_swig.usrp_sink_c_sptr__real_tune(*args, **kwargs)
TypeError: in method 'usrp_sink_c_sptr__real_tune', argument 2 of type 'int'
========================================
the code
#!/usr/bin/python
from gnuradio import gr, eng_notation
from gnuradio import usrp
from gnuradio import audio
from gnuradio import blks2
from gnuradio.eng_option import eng_option
from optparse import OptionParser
from usrpm import usrp_dbid
import math, re, sys, thread, time, tempfile, os, random
from gnuradio.wxgui import stdgui2, fftsink2
import wx
# this function sends a command to Linux that will
# use sox to transform mp3 to raw
def mp3toraw(filename,outputfile):
print("nice -n 19 sox \"%s\" -r 32000 -t raw -f -l -c 1 %s\n" %
(filename,outputfile))
os.system("nice -n 19 sox \"%s\" -r 32000 -t raw -f -l -c 1 %s" %
(filename,outputfile))
# this function will read the location of the mp3 files out of the
#.pls file
def read_playlist(fname):
input = open(fname, 'r')
playlist=[]
l = input.readline()
# NumberOfEntries
l = input.readline()
nentries = int(re.findall("NumberOfEntries=([0-9]+)",l)[0])
print "Number of items in list %d\n" % nentries
i = 1
while l:
l=input.readline()
filepath = re.findall("File[0-9]+=(.*)$",l)
if filepath:
print filepath[0]
playlist.append(filepath[0])
i = i + 1
input.close()
return(playlist)
#this function will create a temprary .raw file that will used by the sox
command
def mktempfn():
tf = tempfile.mkstemp(".raw")
outputfile = tf[1]
os.close(tf[0])
os.remove(tf[1])
return(outputfile)
# this code is used for mudulation
# it takes options from the command line
# most of this code is take from fm_tx4.py
class wfm_tx:
def __init__(self):
parser = OptionParser (option_class=eng_option)
parser.add_option("-T", "--tx-subdev-spec",
type="subdev",default=None,help="select USRP Tx side A or B")
parser.add_option("-f", "--freq", type="eng_float",default=90.1e6,
help="set Tx frequency to FREQ (default 90.1e6)", metavar="FREQ")
parser.add_option("-l","--playlist", action="store",
default="1.pls", help="MP3 playlist containing files to air.")
parser.add_option("","--debug", action="store_true",
default=False,help="Launch Tx debugger")
(options, args) = parser.parse_args ()
if len(args) != 0:
parser.print_help()
sys.exit(1)
if options.playlist == None:
print "No playlist specified\n"
sys.exit()
# parse playlist
playlist = read_playlist(options.playlist)
# setup IQ rate to 320kS/s and audio rate to 32kS/s
self.u = usrp.sink_c()
self.dac_rate = self.u.dac_rate() # 128 MS/s
self.usrp_interp = 400
self.u.set_interp_rate(self.usrp_interp)
self.usrp_rate = self.dac_rate / self.usrp_interp # 320 kS/s
self.sw_interp = 10
self.audio_rate = self.usrp_rate / self.sw_interp # 32 kS/s
# determine the daughterboard subdevice we're using
if options.tx_subdev_spec is None:
options.tx_subdev_spec = usrp.pick_tx_subdevice(self.u)
m = usrp.determine_tx_mux_value(self.u, options.tx_subdev_spec)
self.u.set_mux(m)
self.subdev = usrp.selected_subdev(self.u,options.tx_subdev_spec)
print "Using TX d'board %s" % (self.subdev.side_and_name(),)
self.subdev.set_gain(self.subdev.gain_range()[1]) # set max Tx
gain
if not self.set_freq(options.freq):
freq_range = self.subdev.freq_range()
print "Failed to set frequency to %s. Daughterboard supports %s
to %s" % (
eng_notation.num_to_str(options.freq),
eng_notation.num_to_str(freq_range[0]),
eng_notation.num_to_str(freq_range[1]))
raise SystemExit
self.subdev.set_enable(True) # enable
transmitter
print "TX freq %1.2f MHz\n" % (options.freq/1e6)
gain = gr.multiply_const_cc(4000.0)
i = 0
while 1:
self.fg = gr.flow_graph()
outputfile = mktempfn()
# write raw sound to named pipe in background
thread.start_new_thread(mp3toraw,(playlist[i],outputfile))
# wait untill the conversion of mp3 to raw is completed
time.sleep(3)
print "File size %d\n" % int(os.stat(outputfile)[6])
#specify the source file
src = gr.file_source(gr.sizeof_float, outputfile, False)
#configure the modulation block
fmtx = blks.wfm_tx(self.fg, self.audio_rate,
self.usrp_rate,max_dev=75e3, tau=75e-6)
# connect blocks
self.fg.connect(src, fmtx, gain, self.u)
print "starting to transmit\n"
self.fg.run()
print "done..."
# remove the temprary file
os.remove(outputfile)
# stop the sox command if it is still working
os.system("killall sox")
def set_freq(self, target_freq):
"""
Set the center frequency we're interested in.
"""
r = self.u.tune(self.subdev.which, self.subdev, target_freq)
if r:
print "r.baseband_freq
=",eng_notation.num_to_str(r.baseband_freq)
print "r.dxc_freq =",eng_notation.num_to_str(r.dxc_freq)
print "r.residual_freq
=",eng_notation.num_to_str(r.residual_freq)
print "r.inverted =", r.inverted
return True
return False
if __name__ == '__main__':
wfm_tx()
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
