kopia lustrzana https://github.com/DL7AD/pecanpico9
Added decoder software
rodzic
25c6c08706
commit
049b6b928c
|
@ -0,0 +1,93 @@
|
||||||
|
# Base91 encode/decode for Python 2 and Python 3
|
||||||
|
#
|
||||||
|
# Copyright (c) 2012 Adrien Beraud
|
||||||
|
# Copyright (c) 2015 Guillaume Jacquenot
|
||||||
|
# All rights reserved.
|
||||||
|
#
|
||||||
|
# Redistribution and use in source and binary forms, with or without
|
||||||
|
# modification, are permitted provided that the following conditions are met:
|
||||||
|
#
|
||||||
|
# * Redistributions of source code must retain the above copyright notice,
|
||||||
|
# this list of conditions and the following disclaimer.
|
||||||
|
# * Redistributions in binary form must reproduce the above copyright notice,
|
||||||
|
# this list of conditions and the following disclaimer in the documentation
|
||||||
|
# and/or other materials provided with the distribution.
|
||||||
|
# * Neither the name of Adrien Beraud, Wisdom Vibes Pte. Ltd., nor the names
|
||||||
|
# of its contributors may be used to endorse or promote products derived
|
||||||
|
# from this software without specific prior written permission.
|
||||||
|
#
|
||||||
|
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||||
|
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||||
|
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
|
||||||
|
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||||
|
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||||
|
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||||
|
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||||
|
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||||
|
#
|
||||||
|
import struct
|
||||||
|
|
||||||
|
base91_alphabet = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
|
||||||
|
'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
|
||||||
|
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
|
||||||
|
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
|
||||||
|
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '!', '#', '$',
|
||||||
|
'%', '&', '(', ')', '*', '+', ',', '.', '/', ':', ';', '<', '=',
|
||||||
|
'>', '?', '@', '[', ']', '^', '_', '`', '{', '|', '}', '~', '"']
|
||||||
|
|
||||||
|
decode_table = dict((v,k) for k,v in enumerate(base91_alphabet))
|
||||||
|
|
||||||
|
def decode(encoded_str):
|
||||||
|
''' Decode Base91 string to a bytearray '''
|
||||||
|
v = -1
|
||||||
|
b = 0
|
||||||
|
n = 0
|
||||||
|
out = bytearray()
|
||||||
|
for strletter in encoded_str:
|
||||||
|
if not strletter in decode_table:
|
||||||
|
continue
|
||||||
|
c = decode_table[strletter]
|
||||||
|
if(v < 0):
|
||||||
|
v = c
|
||||||
|
else:
|
||||||
|
v += c*91
|
||||||
|
b |= v << n
|
||||||
|
n += 13 if (v & 8191)>88 else 14
|
||||||
|
while True:
|
||||||
|
out += struct.pack('B', b&255)
|
||||||
|
b >>= 8
|
||||||
|
n -= 8
|
||||||
|
if not n>7:
|
||||||
|
break
|
||||||
|
v = -1
|
||||||
|
if v+1:
|
||||||
|
out += struct.pack('B', (b | v << n) & 255 )
|
||||||
|
return out
|
||||||
|
|
||||||
|
def encode(bindata):
|
||||||
|
''' Encode a bytearray to a Base91 string '''
|
||||||
|
b = 0
|
||||||
|
n = 0
|
||||||
|
out = ''
|
||||||
|
for count in range(len(bindata)):
|
||||||
|
byte = bindata[count:count+1]
|
||||||
|
b |= struct.unpack('B', byte)[0] << n
|
||||||
|
n += 8
|
||||||
|
if n>13:
|
||||||
|
v = b & 8191
|
||||||
|
if v > 88:
|
||||||
|
b >>= 13
|
||||||
|
n -= 13
|
||||||
|
else:
|
||||||
|
v = b & 16383
|
||||||
|
b >>= 14
|
||||||
|
n -= 14
|
||||||
|
out += base91_alphabet[v % 91] + base91_alphabet[v // 91]
|
||||||
|
if n:
|
||||||
|
out += base91_alphabet[b % 91]
|
||||||
|
if n>7 or b>90:
|
||||||
|
out += base91_alphabet[b // 91]
|
||||||
|
return out
|
||||||
|
|
|
@ -0,0 +1,94 @@
|
||||||
|
#!/usr/bin/python
|
||||||
|
|
||||||
|
import serial,os,re,datetime
|
||||||
|
from subprocess import call
|
||||||
|
import base91
|
||||||
|
import binascii
|
||||||
|
import urllib2
|
||||||
|
import io
|
||||||
|
import sys
|
||||||
|
import argparse
|
||||||
|
|
||||||
|
# Parse arguments from terminal
|
||||||
|
parser = argparse.ArgumentParser(description='APRS/SSDV decoder')
|
||||||
|
parser.add_argument('-c', '--call', help='Callsign of the station', required=True)
|
||||||
|
parser.add_argument('-l', '--log', help='Name of the logfile')
|
||||||
|
parser.add_argument('-n', '--grouping', help='Amount packets that will be sent to the SSDV server in one request', default=1, type=int)
|
||||||
|
parser.add_argument('-d', '--device', help='Serial device (\'-\' for stdin)', default='-')
|
||||||
|
parser.add_argument('-b', '--baudrate', help='Baudrate for serial device', default=9600, type=int)
|
||||||
|
parser.add_argument('-s', '--server', help='Server URL', default='https://ssdv.habhub.org/api/v0/packets')
|
||||||
|
args = parser.parse_args()
|
||||||
|
|
||||||
|
if args.device is not '-': # Use serial connection (probably TNC)
|
||||||
|
try:
|
||||||
|
serr = serial.Serial(
|
||||||
|
port=args.device,
|
||||||
|
baudrate=args.baudrate,
|
||||||
|
)
|
||||||
|
except:
|
||||||
|
sys.stderr.write('Error: Could not open serial port\n')
|
||||||
|
sys.exit(1)
|
||||||
|
|
||||||
|
ser = io.TextIOWrapper(io.BufferedRWPair(serr, serr, 1), newline = '\r', line_buffering = True) # Define Newline as \r
|
||||||
|
|
||||||
|
|
||||||
|
# Open logging file
|
||||||
|
if args.log is not None:
|
||||||
|
try:
|
||||||
|
f = open(args.log, 'a')
|
||||||
|
except:
|
||||||
|
sys.stderr.write('Error: Could not open logging file\n')
|
||||||
|
sys.exit(1)
|
||||||
|
|
||||||
|
jsons = []
|
||||||
|
|
||||||
|
while 1:
|
||||||
|
# Read a line (from stdin or serial)
|
||||||
|
data = sys.stdin.readline() if args.device is '-' else ser.readline()
|
||||||
|
|
||||||
|
# Parse line and detect data
|
||||||
|
m = re.search("(.*)\>APECAN:\{\{I(.*)", data)
|
||||||
|
try:
|
||||||
|
call = m.group(1)
|
||||||
|
aprs = m.group(2)
|
||||||
|
except:
|
||||||
|
continue # message format incorrect (probably no APRS message or line cut off too short)
|
||||||
|
|
||||||
|
if args.log is not None:
|
||||||
|
f.write(data) # Log data to file
|
||||||
|
|
||||||
|
data = base91.decode(aprs) # Decode Base91
|
||||||
|
|
||||||
|
if len(data) != 219:
|
||||||
|
continue # APRS message sampled too short
|
||||||
|
|
||||||
|
# Calculate CRC for SSDV server
|
||||||
|
crc = binascii.crc32(data) & 0xffffffff
|
||||||
|
|
||||||
|
# Create message for SSDV server (and save to array)
|
||||||
|
ssdv = '55' + binascii.hexlify(data) + ('%08x' % crc) + (64*'0')
|
||||||
|
jsons.append("""{
|
||||||
|
\"type\": \"packet\",
|
||||||
|
\"packet\": \"""" + ssdv + """\",
|
||||||
|
\"encoding\": \"hex\",
|
||||||
|
\"received\": \"""" + datetime.datetime.now().isoformat('T')[:19] + """Z\",
|
||||||
|
\"receiver\": \"""" + args.call + """\"
|
||||||
|
}""")
|
||||||
|
|
||||||
|
print 'Received packet call %02x%02x%02x%02x image %d packet %d' % (data[1], data[2], data[3], data[4], data[5], data[7] + data[6] * 256)
|
||||||
|
|
||||||
|
if len(jsons) >= args.grouping: # Enough packets collected, send them all to the server
|
||||||
|
|
||||||
|
req = urllib2.Request(args.server)
|
||||||
|
req.add_header('Content-Type', 'application/json')
|
||||||
|
|
||||||
|
json = "{\"type\":\"packets\",\"packets\":[" + ",".join(jsons) + "]}" # Group all SSDV packets into a big JSON
|
||||||
|
jsons = []
|
||||||
|
|
||||||
|
try:
|
||||||
|
result = urllib2.urlopen(req, "".join(json.split(' '))) # Send packets to server
|
||||||
|
print 'Send to SSDV data server: OK'
|
||||||
|
except urllib2.HTTPError, error: # The server did not like our packets :(
|
||||||
|
print 'Send to SSDV data server: failed'
|
||||||
|
print error.read()
|
||||||
|
|
Ładowanie…
Reference in New Issue