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Merge pull request #3 from nzkarit/argparser

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Argparser
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nzkarit 2017-09-09 00:13:39 +12:00 committed by GitHub
commit c24fbb0c6b
7 changed files with 82 additions and 40 deletions
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55
ADSB_Encoder.py
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@ -5,6 +5,7 @@ from HackRF import HackRF
from PPM import PPM
from ModeS import ModeS
from sys import argv, exit
from optparse import OptionParser
import os
###############################################################
@ -24,46 +25,40 @@ import os
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
###############################################################
# Further work on fork
# Copyright (C) 2017 David Robinson
def optionParser():
usage = 'usage: %prog [options]'
parser = OptionParser(usage=usage)
parser.add_option('-i', '--icao', action='store', type='int', dest='icao', default='0xABCDEF', help='The ICAO number for the plane in hex. Ensure the ICAO is prefixed with \'0x\' to ensure this is parsed as a hex number. Default: %default')
parser.add_option('--lat', '--latitude', action='store', type='float', dest='latitude', default='12.34', help='Latitude for the plane in decminal degrees. Default: %default')
parser.add_option('--lon', '--long', '--longitude', action='store', type='float', dest='longitude', default='56.78', help='Longitude for the place in decminal degrees. Default: %default')
parser.add_option('-a', '--alt', '--altitude', action='store', type='float', dest='altitude', default='9876.5', help='Altitude in decminal feet. Default: %default')
parser.add_option('--ca', '--capability', action='store', type='int', dest='capability', default=5, help='The capability. (Think this is always 5 from ADSB messages. More info would be appreciate). Default: %default')
parser.add_option('--tc', '--typecode', action='store', type='int', dest='typecode', default=11, help='The type for the ADSB messsage. See https://adsb-decode-guide.readthedocs.io/en/latest/content/introduction.html#ads-b-message-types for more information. Default: %default')
parser.add_option('--ss', '--surveillancestatus', action='store', type='int', dest='surveillancestatus', default=0, help='The surveillance status. (Think this is always 0 from ADSB messages. More info would be appreciate). Default: %default')
parser.add_option('--nicsb', '--nicsupplementb', action='store', type='int', dest='nicsupplementb', default=0, help='The NIC supplement-B.(Think this is always 0 from ADSB messages. More info would be appreciate). Default: %default')
parser.add_option('--time', action='store', type='int', dest='time', default=0, help='The time. (Think this is always 0 from ADSB messages. More info would be appreciate). Default: %default')
parser.add_option('-s', '--surface', action='store', default=False, dest='surface', help='If the plane is on the ground or not. Default: %default')
parser.add_option('-o', '--out', '--output', action='store', type='string', default='Samples_256K.iq8s', dest='outputfilename', help='The iq8s output filename. This is the file which you will feed into the hackRF. Default: %default')
return parser.parse_args()
if __name__ == "__main__":
argc = len(argv)
if argc != 5:
print
print 'Usage: '+ argv[0] +' <ICAO> <Latitude> <Longtitude> <Altitude>'
print
print ' Example: '+ argv[0] +' 0xABCDEF 12.34 56.78 9999.0'
print
exit(2)
icao = int(argv[1], 16)
lat = float(argv[2])
lon = float(argv[3])
alt = float(argv[4])
ca = 5 # Capability
tc = 11 # Type Code see: https://adsb-decode-guide.readthedocs.io/en/latest/content/introduction.html#ads-b-message-types
ss = 0 # Surveillance status
nicsb = 0 # NIC supplement-B
time = 0
surface = False
options, arguments = optionParser()
print options
modes = ModeS()
(df17_even, df17_odd) = modes.df17_pos_rep_encode(ca, icao, tc, ss, nicsb, alt, time, lat, lon, surface)
(df17_even, df17_odd) = modes.df17_pos_rep_encode(options.capability, options.icao, options.typecode, options.surveillancestatus, options.nicsupplementb, options.altitude, options.time, options.latitude, options.longitude, options.surface)
#print ''.join(format(x, '02x') for x in df17_even)
#print ''.join(format(x, '02x') for x in df17_odd)
ppm = PPM()
df17_array = ppm.frame_1090es_ppm_modulate(df17_even, df17_odd)
#OutFile = open("filename.bin", "wb")
#OutFile.write(df17_array)
hackrf = HackRF()
samples_array = hackrf.hackrf_raw_IQ_format(df17_array)
SamplesFile = open("Samples.iq8s", "wb") # TODO make this a function and take the file name. Also have the option to run dd on it.
# TODO make it empty the file first.
SamplesFile = open('tmp.iq8s', 'wb')
SamplesFile.write(samples_array)
os.system("dd if=Samples.iq8s of=Samples_256K.iq8s bs=4k seek=63") # TODO make this a flag, also make it take the file name
os.system("dd if=tmp.iq8s of=%s bs=4k seek=63" % (options.outputfilename))
os.system('rm tmp.iq8s')

4
Encoder.py
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@ -10,7 +10,9 @@ class Encoder:
Manchester encoding and decoding is also included, and by default will use
least bit ordering for the byte that is to be included in the array.
"""
###############################################################
# Further work on fork
# Copyright (C) 2017 David Robinson
def extract_bit(self, byte, pos):
"""
Extract a bit from a given byte using MS ordering.

4
HackRF.py
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@ -1,5 +1,7 @@
import numpy
###############################################################
# Further work on fork
# Copyright (C) 2017 David Robinson
class HackRF:
"""The HackRF class has functions from converting data into a format into which the hackrf can process
"""

4
ModeS.py
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@ -1,6 +1,8 @@
from ModeSLocation import ModeSLocation
import math
###############################################################
# Further work on fork
# Copyright (C) 2017 David Robinson
class ModeS:
"""This class handles the ModeS ADSB manipulation
"""

4
ModeSLocation.py
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@ -26,7 +26,9 @@ class ModeSLocation:
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
###############################################################
# Further work on fork
# Copyright (C) 2017 David Robinson
def encode_alt_modes(self, alt, bit13):
mbit = False
qbit = True

4
PPM.py
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@ -1,6 +1,8 @@
import numpy
from Encoder import Encoder
###############################################################
# Further work on fork
# Copyright (C) 2017 David Robinson
class PPM:
"""The PPM class contains functions about PPM manipulation
"""

47
README.md
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@ -9,12 +9,49 @@ open source "ADS-B In" solutions. One known good example is [Stratux](https://gi
The source code is published for academic purpose only.
## Instructions
1. Execute *ADSB_Encoder.py* script with `<ICAO>` `<Latitude>` `<Longtitude>` `<Altitude>` arguments:
1. Execute *ADSB_Encoder.py* all the options have defaults so none are needed to generate with defaults. Running help will show you the optiosn you can change:
```
$ ADSB_Encoder.py 0xABCDEF 12.34 56.78 9999.0
$ ls Samples.iq8s
Samples.iq8s
$
$ ADSB_Encoder.py
$ ADSB_Encoder.py -h
Usage: ADSB_Encoder.py [options]
Options:
-h, --help show this help message and exit
-i ICAO, --icao=ICAO The ICAO number for the plane in hex. Ensure the ICAO
is prefixed with '0x' to ensure this is parsed as a
hex number. Default: 0xABCDEF
--lat=LATITUDE, --latitude=LATITUDE
Latitude for the plane in decminal degrees. Default:
12.34
--lon=LONGITUDE, --long=LONGITUDE, --longitude=LONGITUDE
Longitude for the place in decminal degrees. Default:
56.78
-a ALTITUDE, --alt=ALTITUDE, --altitude=ALTITUDE
Altitude in decminal feet. Default: 9876.5
--ca=CAPABILITY, --capability=CAPABILITY
The capability. (Think this is always 5 from ADSB
messages. More info would be appreciate). Default: 5
--tc=TYPECODE, --typecode=TYPECODE
The type for the ADSB messsage. See https://adsb-
decode-guide.readthedocs.io/en/latest/content/introduc
tion.html#ads-b-message-types for more information.
Default: 11
--ss=SURVEILLANCESTATUS, --surveillancestatus=SURVEILLANCESTATUS
The surveillance status. (Think this is always 0 from
ADSB messages. More info would be appreciate).
Default: 0
--nicsb=NICSUPPLEMENTB, --nicsupplementb=NICSUPPLEMENTB
The NIC supplement-B.(Think this is always 0 from
ADSB messages. More info would be appreciate).
Default: 0
--time=TIME The time. (Think this is always 0 from ADSB messages.
More info would be appreciate). Default: 0
-s SURFACE, --surface=SURFACE
If the plane is on the ground or not. Default: False
-o OUTPUTFILENAME, --out=OUTPUTFILENAME, --output=OUTPUTFILENAME
The iq8s output filename. This is the file which you
will feed into the hackRF. Default: Samples_256K.iq8s
```
2. Transmit the signal into air:
```