def arguments():
parser = argparse.ArgumentParser(prog="rtlsdr_scan.py",
description='''
Scan a range of frequencies and
save the results to a file''')
parser.add_argument("-s", "--start", help="Start frequency (MHz)",
type=int)
parser.add_argument("-e", "--end", help="End frequency (MHz)", type=int)
parser.add_argument("-g", "--gain", help="Gain (dB)", type=float, default=0)
parser.add_argument("-d", "--dwell", help="Dwell time (seconds)",
type=float, default=0.1)
parser.add_argument("-f", "--fft", help="FFT bins", type=int, default=1024)
parser.add_argument("-l", "--lo", help="Local oscillator offset", type=int,
default=0)
group = parser.add_mutually_exclusive_group()
group.add_argument("-i", "--index", help="Device index (from 0)", type=int,
default=0)
group.add_argument("-r", "--remote", help="Server IP and port", type=str)
help = 'Output file (.rfs, ' + File.get_export_pretty() + ')'
parser.add_argument("file", help=help, nargs='?')
args = parser.parse_args()
error = None
isGui = True
if args.start is not None or args.end is not None:
if args.start is not None:
if args.end is not None:
if args.file is not None:
isGui = False
else:
error = "No filename specified"
else:
error = "No end frequency specified"
else:
error = "No start frequency specified"
elif args.file is not None:
args.dirname, args.filename = os.path.split(args.file)
if error is not None:
print "Error: {0}".format(error)
parser.exit(1)
return isGui, (args)
def export_image(filename, format, figure):
oldSize = figure.get_size_inches()
oldDpi = figure.get_dpi()
figure.set_size_inches((8, 4.5))
figure.set_dpi(600)
canvas = FigureCanvasAgg(figure)
canvas.draw()
renderer = canvas.get_renderer()
if matplotlib.__version__ >= '1.2':
buf = renderer.buffer_rgba()
else:
buf = renderer.buffer_rgba(0, 0)
size = canvas.get_width_height()
image = Image.frombuffer('RGBA', size, buf, 'raw', 'RGBA', 0, 1)
image = image.convert('RGB')
ext = File.get_export_ext(format, File.Exports.IMAGE)
image.save(filename, format=ext[1::])
figure.set_size_inches(oldSize)
figure.set_dpi(oldDpi)
def __init__(self, pool, args):
start = args.start
end = args.end
gain = args.gain
dwell = args.dwell
nfft = args.fft
lo = args.lo
index = args.index
remote = args.remote
directory, filename = os.path.split(args.file)
_null, ext = os.path.splitext(args.file)
self.lock = threading.Lock()
self.stepsTotal = 0
self.steps = 0
self.spectrum = {}
self.settings = Settings(load=False)
self.queue = Queue.Queue()
error = None
if end <= start:
error = "Start should be lower than end"
elif dwell <= 0:
error = "Dwell should be positive"
elif nfft <= 0:
error = "FFT bins should be positive"
elif ext != ".rfs" and File.get_export_type(ext) == -1:
error = "File extension should be .rfs, "
error += File.get_export_pretty()
else:
device = Device()
if remote is None:
self.settings.devices = get_devices()
count = len(self.settings.devices)
if index > count - 1:
error = "Device not found ({0} devices in total):\n".format(count)
for device in self.settings.devices:
error += "\t{0}: {1}\n".format(device.index,
device.name)
else:
device.isDevice = False
url = urlparse('//' + remote)
if url.hostname is not None:
device.server = url.hostname
else:
error = "Invalid hostname"
if url.port is not None:
device.port = url.port
else:
device.port = 1234
self.settings.devices.append(device)
index = len(self.settings.devices) - 1
if error is not None:
print "Error: {0}".format(error)
exit(1)
if end - 1 < start:
end = start + 1
if remote is None:
gain = nearest(gain, self.settings.devices[index].gains)
self.settings.start = start
self.settings.stop = end
self.settings.dwell = calc_real_dwell(dwell)
self.settings.nfft = nfft
self.settings.devices[index].gain = gain
self.settings.devices[index].lo = lo
print "{0} - {1}MHz".format(start, end)
print "{0}dB Gain".format(gain)
print "{0}s Dwell".format(self.settings.dwell)
print "{0} FFT points".format(nfft)
print "{0}MHz LO".format(lo)
if remote is not None:
print remote
else:
print self.settings.devices[index].name
self.scan(self.settings, index, pool)
if ext == ".rfs":
scanInfo = ScanInfo()
scanInfo.setFromSettings(self.settings)
save_plot(directory, filename, scanInfo, self.spectrum)
else:
exportType = File.get_export_type(ext)
export_plot(directory, filename, exportType, self.spectrum)
print "Done"