Add Python ground station apps (messages, plotter, udp link, dashboard)

sw/lib/python/messages_xml_map.py

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+#!/usr/bin/env python
+
+import os
+import sys
+import getopt
+
+messages_path = '%s/conf/messages.xml' % os.getenv("PAPARAZZI_HOME")
+
+message_dictionary = {}
+message_dictionary_types = {}
+message_dictionary_id_name = {}
+
+def Usage(scmd):
+	lpathitem = scmd.split('/')
+	fmt = '''Usage: %s [-h | --help] [-f FILE | --file=FILE]
+where
+\t-h | --help print this message
+\t-f FILE | --file=FILE where FILE is path to messages.xml 
+'''
+	print fmt   %  lpathitem[-1]
+
+def GetOptions():
+	try:
+		optlist, left_args = getopt.getopt(sys.argv[1:],'hf:', ['help','file='])
+	except getopt.GetoptError:
+		# print help information and exit:
+		Usage(sys.argv[0])
+		sys.exit(2)
+	for o, a in optlist:
+		if o in ("-h", "--help"):
+			Usage(sys.argv[0])
+			sys.exit()
+		elif o in ("-f", "--file"):
+			messages_path = a
+
+
+def ParseMessages():
+  from lxml import etree
+  tree = etree.parse( messages_path)
+  for the_message in tree.xpath("//class[@name='telemetry']/message[@name]"):
+      message_name = the_message.attrib['name']
+      if the_message.attrib.has_key('id'):
+        message_id = the_message.attrib['id']
+      else:
+        message_id = the_message.attrib['ID']
+      if (message_id[0:2] == "0x"):
+        message_id = int(message_id, 16)
+      else:
+        message_id = int(message_id)
+
+      message_dictionary_id_name[message_id] = message_name
+
+      # insert this message into our dictionary as a list with room for the fields
+      message_dictionary[message_name] = []
+      message_dictionary_types[message_id] = []
+
+      for the_field in the_message.xpath('field[@name]'):
+        # for now, just save the field names -- in the future maybe expand this to save a struct?
+        message_dictionary[message_name].append( the_field.attrib['name'])
+        message_dictionary_types[message_id].append( the_field.attrib['type'])
+    
+def test():
+  GetOptions()
+  ParseMessages()
+  print message_dictionary['WHIRLY']
+  print message_dictionary['WHIRLY'].index('plane2_pitch')
+  print message_dictionary['ACTUATORS']
+  print message_dictionary['ACTUATORS'].index('actuator0')
+  print message_dictionary_types[53]
+  print message_dictionary_id_name[53]
+  
+  
+if __name__ == '__main__':
+  test()
+
+