Add software

Software/portapack-mayhem/firmware/tools/make_airlines_db/README.md

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+# Make airlines.db
+
+Licensed under [GNU GPL v3](../../../LICENSE)
+
+USAGE:
+ - Copy file from: https://raw.githubusercontent.com/kx1t/planefence-airlinecodes/main/airlinecodes.txt
+ - Run Python 3 script: `./make_airlines_db.py` 
+ - Copy file to /ADSB folder on SDCARD

Software/portapack-mayhem/firmware/tools/make_airlines_db/make_airlines_db.py

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+#!/usr/bin/env python3
+
+# Copyright (C) 2021 ArjanOnwezen
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+# -------------------------------------------------------------------------------------
+# Create airline.db, used for ADS-B receiver application, using
+# https://raw.githubusercontent.com/kx1t/planefence-airlinecodes/main/airlinecodes.txt
+# as a source.
+# -------------------------------------------------------------------------------------
+import csv
+import unicodedata
+icao_codes=bytearray()
+airlines_countries=bytearray()
+row_count=0
+
+database=open("airlines.db", "wb")
+
+with open('airlinecodes.txt', 'rt') as csv_file:
+        sorted_lines=sorted(csv_file.readlines())
+
+        for row in csv.reader(sorted_lines, quotechar='"', delimiter=',', quoting=csv.QUOTE_ALL, skipinitialspace=True):
+                icao_code=row[0]
+                # Normalize some unicode characters
+                airline=unicodedata.normalize('NFKD', row[1][:32]).encode('ascii', 'ignore')
+                country=unicodedata.normalize('NFKD', row[3][:32]).encode('ascii', 'ignore')
+                if len(icao_code) == 3 :
+                        airline_padding=bytearray()
+                        country_padding=bytearray()
+                        print(icao_code,' - ', airline,' - ', country)
+                        icao_codes=icao_codes+bytearray(icao_code+'\0', encoding='ascii')
+                        airline_padding=bytearray('\0' * (32 - len(airline)), encoding='ascii')
+                        country_padding=bytearray('\0' * (32 - len(country)), encoding='ascii')
+                        airlines_countries=airlines_countries+bytearray(airline+airline_padding+country+country_padding)
+                        row_count+=1
+
+database.write(icao_codes+airlines_countries)
+print("Total of", row_count, "ICAO codes stored in database")
+