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Added uhd_modes.py, a UHD port of the usrp_modes.py program. Basically the same but takes a rate instead of a decimation.

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Right now there's a 1e6 gain block in there because old USRP spit out roughly 1e6x data as USRP2. Haven't investigated this for USRP vs USRP2 yet. Don't know why blocks care, actually.
This commit is contained in:
Nick Foster
2010-09-15 15:25:09 -07:00
parent 4a92b250ea
commit 13c5acca52
2 changed files with 170 additions and 558 deletions
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558
config/Makefile
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#!/usr/bin/env python
from gnuradio import gr, gru, optfir, eng_notation, blks2, air
from gnuradio import uhd
from gnuradio.eng_option import eng_option
from optparse import OptionParser
import time, os, sys
from string import split, join
from usrpm import usrp_dbid
from modes_print import modes_print
from modes_sql import modes_sql
import gnuradio.gr.gr_threading as _threading
import MySQLdb
class top_block_runner(_threading.Thread):
def __init__(self, tb):
_threading.Thread.__init__(self)
self.setDaemon(1)
self.tb = tb
self.done = False
self.start()
def run(self):
self.tb.run()
self.done = True
"""
The following are optional command line parameters:
-R SUBDEV Daughter board specification, defaults to first found
-f FREQ USRP receive frequency (1090 MHz Default)
-g GAIN Daughterboard gain setting. Defaults to mid-range.
-d DECIM USRP decimation rate
-t THRESH Receiver valid pulse threshold
-a Output all frames. Defaults only output frames
Once the program is running, ctrl-break (Ctrl-C) stops operation.
"""
class adsb_rx_block (gr.top_block):
def __init__(self, options, args, queue):
gr.top_block.__init__(self)
self.options = options
self.args = args
if options.filename is None:
self.u = uhd.simple_source("", uhd.io_type_t.COMPLEX_FLOAT32)
if(options.rx_subdev_spec is None):
options.rx_subdev_spec = ""
self.u.set_subdev_spec(options.rx_subdev_spec)
rate = options.rate
self.u.set_samp_rate(rate)
rate = int(self.u.get_samp_rate()) #retrieve actual
if options.gain is None: #set to halfway
g = self.u.get_gain_range()
options.gain = (g[0]+g[1]) / 2.0
if not(self.tune(options.freq)):
print "Failed to set initial frequency"
print "Setting gain to %i" % (options.gain,)
self.u.set_gain(options.gain)
# self.subdev.set_bw(self.options.bandwidth) #only for DBSRX
else:
rate = options.rate
self.u = gr.file_source(gr.sizeof_gr_complex, options.filename)
print "Rate is %i" % (rate,)
print "Gain is %i" % (self.u.get_gain(),)
pass_all = 0
if options.output_all :
pass_all = 1
self.gain = gr.multiply_const_cc(1000000)
self.demod = gr.complex_to_mag()
self.avg = gr.moving_average_ff(100, 1.0/100, 400);
self.preamble = air.modes_preamble(rate, options.threshold)
self.framer = air.modes_framer(rate)
self.slicer = air.modes_slicer(rate, queue)
# if options.rate < 16:
#there's a really nasty spur at 1088 caused by a multiple of the USRP xtal. if you use a decimation of 16, it gets filtered out by the CIC. if not, it really fucks with you unless you filter it out.
# filter_coeffs = gr.firdes.band_reject(1.0, rate, 1.7e6, 2.3e6, 0.5e6, gr.firdes.WIN_HAMMING)
# self.filt = gr.fir_filter_ccf(1, filter_coeffs)
# self.connect(self.u, self.filt)
# else:
self.filt = self.u
self.connect(self.filt, self.gain, self.demod)
self.connect(self.demod, self.avg)
self.connect(self.demod, (self.preamble, 0))
self.connect(self.avg, (self.preamble, 1))
self.connect(self.demod, (self.framer, 0))
self.connect(self.preamble, (self.framer, 1))
self.connect(self.demod, (self.slicer, 0))
self.connect(self.framer, (self.slicer, 1))
def tune(self, freq):
result = self.u.set_center_freq(freq)
return result
if __name__ == '__main__':
usage = "%prog: [options] output filename"
parser = OptionParser(option_class=eng_option, usage=usage)
parser.add_option("-R", "--rx-subdev-spec", type="subdev",
help="select USRP Rx side A or B", metavar="SUBDEV")
parser.add_option("-f", "--freq", type="eng_float", default=1090e6,
help="set receive frequency in Hz [default=%default]", metavar="FREQ")
parser.add_option("-g", "--gain", type="int", default=None,
help="set RF gain", metavar="dB")
parser.add_option("-r", "--rate", type="int", default=4000000,
help="set ADC sample rate [default=%default]")
parser.add_option("-T", "--threshold", type="eng_float", default=3.0,
help="set pulse detection threshold above noise in dB [default=%default]")
parser.add_option("-a","--output-all", action="store_true", default=False,
help="output all frames")
parser.add_option("-b","--bandwidth", type="eng_float", default=5e6,
help="set DBSRX front-end bandwidth in Hz [default=5e6]")
parser.add_option("-F","--filename", type="string", default=None,
help="read data from file instead of USRP")
parser.add_option("-D","--database", action="store_true", default=False,
help="send to database instead of printing to screen")
(options, args) = parser.parse_args()
# if len(args) != 1:
# parser.print_help()
# sys.exit(1)
# filename = args[0]
queue = gr.msg_queue()
if options.database is True:
db = MySQLdb.connect(host="localhost", user="planes", passwd="planes", db="planes")
fg = adsb_rx_block(options, args, queue)
runner = top_block_runner(fg)
while 1:
try:
if queue.empty_p() == 0 :
while queue.empty_p() == 0 :
msg = queue.delete_head() #blocking read
if options.database is False:
print modes_print(msg.to_string())
else:
query = modes_sql(msg.to_string())
if query is not None:
c = db.cursor()
c.execute(query)
elif runner.done:
break
else:
time.sleep(0.1)
except KeyboardInterrupt:
fg.stop()
runner = None
break