1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
# -*- coding: utf-8 -*-
import asynchat
import asyncore
import socket
import sys
import os
from lxml import objectify
from lxml import etree
class UnknownPacketException(Exception):
pass
class EbusPacket(object):
EBUS_SPECIFICATION = os.path.join(os.path.dirname(__file__), "ebus_specification.xml")
ebus_xml = objectify.parse(open(EBUS_SPECIFICATION))
@staticmethod
def address_to_type(address):
d=[dev.get("type") for dev in EbusPacket.ebus_xml.xpath("/ebus/devices/device[@address=$address]",
address="#x%.2x"%address)]
return len(d)>0 and d[0] or None
def __init__(self, source, destination, primary_command, secondary_command):
self.source = source
self.destination = destination
self.primary_command = primary_command
self.secondary_command = secondary_command
def __str__(self):
#XXX self.length only in subclasses
return "<%-18s name=\"%s\" source=\"0x%.2x\" destination=\"0x%.2x\" primary=0x%x secondary=0x%x length=0x%x>" % \
(self.__class__.__name__, self.name(), self.source, self.destination, \
self.primary_command, self.secondary_command, self.length)
def get_packet_description(self):
p=EbusPacket.ebus_xml.xpath("/ebus/packets/packet[@primary=$primary and @secondary=$secondary]",
primary="#x%.2x"%self.primary_command,
secondary="#x%.2x"%self.secondary_command)
if len(p)>0 and p[0] is not None:
return p[0]
else:
raise UnknownPacketException("Unknown Packet, primary_command=#x%.2x secondary_command=#x%.2x" % (
self.primary_command,
self.secondary_command))
def _get_source_name(self):
s=EbusPacket.ebus_xml.xpath("/ebus/devices/device[@address=$address]",
address="#x%.2x"%self.source)
return len(s)>0 and s[0] or None
def _get_destination_name(self):
d=EbusPacket.ebus_xml.xpath("/ebus/devices/device[@address=$address]",
address="#x%.2x"%self.destination)
return len(d)>0 and d[0] or None
def name(self):
return self.get_packet_description().get("name")
def description(self):
return self.get_packet_description().get("description")
class EbusMasterMaster(EbusPacket):
def __init__(self, source, destination, primary_command, secondary_command, data):
EbusPacket.__init__(self, source, destination, primary_command, secondary_command)
self.length = len(data)
self.data = data
class EbusMasterSlave(EbusPacket):
def __init__(self, source, destination, primary_command, secondary_command, request, response):
EbusPacket.__init__(self, source, destination, primary_command, secondary_command)
self.length = len(request)
self.request = request
self.response = response
self.data = self.request #XXX
class EbusBroadcast(EbusPacket):
def __init__(self, source, destination, primary_command, secondary_command, data):
EbusPacket.__init__(self, source, destination, primary_command, secondary_command)
self.length = len(data)
self.data = data
class EbusReader(asynchat.async_chat):
def __init__(self):
asynchat.async_chat.__init__(self)
self.set_terminator("")
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.connect(("10.2.2.200", 7970))
self.packetIndex = 0
self.buf = ""
self.debug = False
def collect_incoming_data(self,data):
for it in range(len(data)):
if data[it] == "\xaa":
if it+1 < len(data) and data[it+1] != "\xaa":
self._parse(self.buf)
self.buf = ""
self.packetIndex = 0
else:
self.buf += data[it]
self.packetIndex = self.packetIndex + 1
#print "%.2x [%d]" % (ord(data[it]),self.packetIndex)
def _parse(self,dataRaw):
#0xaa bug
i = 0
data = ""
while (i+1) < len(dataRaw):
if ord(dataRaw[i]) == 0xaa and ord(dataRaw[i+1]) == 0x01:
data += "\xaa"
i = i + 1
elif ord(dataRaw[i]) == 0xa9 and ord(dataRaw[i+1]) == 0x00:
data += "\xa9"
i = i + 1
else:
data += dataRaw[i]
i = i + 1
if len(data) < 2:
print "GAGA"
return
source = ord(data[0])
sourceType = EbusPacket.address_to_type(source)
destination = ord(data[1])
destinationType = EbusPacket.address_to_type(destination)
if len(data) < 9:
print >>sys.stderr, "Unvollständige Daten"
return
primaryCommand = ord(data[2])
secondaryCommand = ord(data[3])
payloadLength = ord(data[4])
payload = data[5:5+payloadLength]
if self.debug:
print "\033[1;31m%.2x %.2x\033[1;m \033[1;33m%.2x %.2x\033[1;m \033[1;30m%.2x\033[1;m \033[1;45m%s\033[1;m" % (
source,
destination,
primaryCommand,
secondaryCommand,
payloadLength,
" ".join(map(lambda byte: "%.2x"%ord(byte), payload)))
try:
if sourceType == 'master' and destinationType == 'master':
p = EbusMasterMaster(source, destination, primaryCommand, secondaryCommand, payload)
self.handle_ebus(p)
elif sourceType == 'master' and destinationType == 'slave':
p = EbusMasterSlave(source, destination, primaryCommand, secondaryCommand, payload, None) #FIXME
print >>sys.stderr, "SKIP MASTER-SLAVE"
elif sourceType == 'master' and destinationType == 'broadcast':
p = EbusBroadcast(source, destination, primaryCommand, secondaryCommand, payload)
self.handle_ebus(p)
else:
print >>sys.stderr, "SKIP source=%s sourceType=%s destination=%s destType=%s" % \
(source, sourceType, destination, destinationType)
except UnknownPacketException,e:
print e
def handle_ebus(self,ebus_packet):
print >>sys.stderr, "unhandled ebus_packet"
|
