WOrk on >50175 feet altitudes and generating all altitudes

.gitignore

@@ -8,3 +8,5 @@ allICAO.py
 hackRFAllICAO.sh
 allLat.py
 hackRFAllLat.sh
+allAlt.py
+hackRFAllAlt.sh

ADSB_Encoder.py

@@ -56,7 +56,7 @@ def argParser():
     parser.add_argument('--tc', '--typecode', action='store', type=int, dest='typecode', default=cfg.getint('plane', 'typecode'), help='The type for the ADS-B message. 11 is an air position message. See https://adsb-decode-guide.readthedocs.io/en/latest/content/introduction.html#ads-b-message-types for more information. 5 bits. Default: %(default)s')
     parser.add_argument('--ss', '--surveillancestatus', action='store', type=int, dest='surveillancestatus', default=cfg.getint('plane', 'surveillancestatus'), help='The surveillance status. (Think this is always 0 from ADS-B messages. More info would be appreciated).  Default: %(default)s')
     parser.add_argument('--nicsb', '--nicsupplementb', action='store', type=int, dest='nicsupplementb', default=cfg.getint('plane', 'nicsupplementb'), help='The  NIC supplement-B.(Think this is always 0 from ADS-B messages. More info would be appreciated).  Default: %(default)s')
-    parser.add_argument('--time', action='store', type=int, dest='time', default=cfg.getint('plane', 'time'), help='The  time. (Think this is always 0 from ADS-B messages. More info would be appreciated).  Default: %(default)s')
+    parser.add_argument('--time', action='store', type=int, dest='time', default=cfg.getint('plane', 'time'), help='0 indicates the time is not synchronous with UTC.  Default: %(default)s')
     parser.add_argument('-s', '--surface', action='store', default=cfg.getboolean('plane', 'surface'), type=auto_bool, dest='surface', help='If the plane is on the ground or not. Default: %(default)s')
     parser.add_argument('-o', '--out', '--output', action='store', type=str, default=cfg.get('general', 'outputfilename'), dest='outputfilename', help='The iq8s output filename. This is the file which you will feed into the hackRF. Default: %(default)s')
     parser.add_argument('-r', '--repeats', action='store', dest='repeats', type=int, default=cfg.getint('general', 'repeats'), help='How many repeats of the data to perform. Default: %(default)s')

ModeS.py

@@ -17,7 +17,7 @@ class ModeS:
         location = ModeSLocation()
         enc_alt =	location.encode_alt_modes(alt, surface)
         #print "Alt(%r): %X " % (surface, enc_alt)
-
+        
         #encode that position
         (evenenclat, evenenclon) = location.cpr_encode(lat, lon, False, surface)
         (oddenclat, oddenclon)   = location.cpr_encode(lat, lon, True, surface)

ModeSLocation.py

@@ -30,9 +30,18 @@ class ModeSLocation:
 # Further work on fork
 # Copyright (C) 2017 David Robinson
     def encode_alt_modes(self, alt, bit13):
+        # need to better understand as the >50175 feet not working
+        # TODO >50175 feet
         mbit = False
         qbit = True
-        encalt = int((int(alt) + 1000) / 25)
+        # For altitudes -1000<=X<=50175 feet, set bit 8 AKA the Q bit to true which means 25 feet resoulution
+        # For >50175 set the qbit to False and use 100 feet resoultion
+        if alt > 50175:
+            qbit = False
+            encalt = int((int(alt) + 1000) / 100)
+        else:
+            qbit = True
+            encalt = int((int(alt) + 1000) / 25)
 
         if bit13 is True:
             tmp1 = (encalt & 0xfe0) << 2

generateAllAlt.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+#
+# Will generate a CSV with all Latitudes
+import csv
+import os
+
+def writeFile(directory, filename, filenameExtension, data, count):
+    csvFilename = os.path.join(directory, "%s-%s.%s"%(filename, count, filenameExtension))
+    with open(csvFilename, 'w', newline='') as csvfile:
+        output = csv.writer(csvfile, delimiter=',', quotechar='"', quoting=csv.QUOTE_MINIMAL)
+        output.writerow(['altitude'])
+        for row in data:
+            output.writerow([row])
+        csvfile.close()
+        return "{'csv':'%s', 'out':'%s-%s.iq8s'},"%(csvFilename, filename, count)
+
+def main():
+    directory = 'generated'
+    filename = 'allAlt'
+    filenameExtension = 'csv'
+    scriptFilename = 'allAlt.py'
+    hackRFScriptFilename = 'hackRFAllAlt.sh'
+
+    minAlt = -1100
+    maxAlt = 100000
+    splitNumber = 1000
+    step = 1
+
+    try:
+        os.stat(directory)
+    except:
+        os.mkdir(directory) 
+
+    script = open(scriptFilename, 'w')
+    script.write('#!/usr/bin/env python3\n')
+    script.write('import time\n')
+    script.write('import threading\n')
+    script.write('from ADSB_Encoder import *\n')
+
+    hackRFScript = open(hackRFScriptFilename, 'w')
+    hackRFScript.write('#!/bin/bash\n')
+    
+    
+    i = minAlt
+    j = 0
+    k = 0
+    data = []
+     
+    files = ''
+    while i <= maxAlt:
+        if j == splitNumber:
+            files += writeFile(directory, filename, filenameExtension, data, k)
+            data = []
+            hackRFScript.write("hackrf_transfer -t %s-%s.iq8s -f 915000000 -s 2000000 -x 10\n" % (filename, k))
+            k += 1
+            j = 0            
+        data.append(i)
+        i += step
+        j += 1
+    files += writeFile(directory, filename, filenameExtension, data, k)
+    data = []
+    hackRFScript.write("hackrf_transfer -t %s-%s.iq8s -f 915000000 -s 2000000 -x 10\n" % (filename, k))
+    k += 1
+    j = 0    
+    files = files[:-1]
+    script.write('files = [%s]\n' % (files))
+    script.write('for file in files:\n')
+    script.write('    t = threading.Thread(target=threadingCSV, args=(file,))\n')
+    script.write('    t.start()\n')
+    script.write('    print(file)\n')
+    script.write('    time.sleep(1)\n')
+    script.close()
+    hackRFScript.close()
+
+if __name__ == "__main__":
+    main()
+
+    
+		

generateAllLat.py

@@ -23,7 +23,6 @@ def main():
 
     minLat = -90
     maxLat = 90
-    # If the number of lat is less than the split it doesn't work
     splitNumber = 1000
     step = 0.1