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# -*- coding:utf8 -*-
import asynchat
import asyncore
import socket
import sys
import json
# Master-Master
# 1 quell
# 1 ziel
# 1 1primaerbefehl
# 1 sekundaerbefehl
# 1 n=laenge (bytes)
# n daten....
# 1 CRC
# 1 ack (=0x00 || 0xff)
# 1 syn (=0xaa)
# Master-Slave
# 1 quell
# 1 ziel
# 1 1primaerbefehl
# 1 sekundaerbefehl
# 1 n=laenge (bytes)
# n daten vom master/Anfrage....
# 1 CRC
# 1 ack (=0x00 || 0xff)
# 1 m=länge (bytes)
# m daten vom slave/Antwort...
# 1 syn (=0xaa)
deviceDescription = [
{'address':0x03, 'type':'master', 'description':'Feuerungsautomat'},
{'address':0x10, 'type':'master', 'description':'Heizungsregler #2'},
{'address':0x30, 'type':'master', 'description':'Heizkreisregler 1'},
{'address':0x70, 'type':'master', 'description':'Heizkreisregler 2'},
{'address':0x71, 'type':'master', 'description':'Heizungsregler #9'},
{'address':0xf1, 'type':'master', 'description':'Heizungsregler #10'},
{'address':0x50, 'type':'slave', 'description':'Mischer 1'},
{'address':0x51, 'type':'slave', 'description':'Mischer 2'},
{'address':0xfe, 'type':'broadcast', 'description':'Broadcast'},
]
packetDescription = [
{'primary':0x7, 'secondary':0x9, 'name':'UNKNOWN'},
{'primary':0x14, 'secondary':0x7, 'name':'UNKNOWN'},
# Response
#p[0] = Einheit (1=>Liter, 2=>Kubik)
#p[1] = 10^0
#p[2] = 10^2
#p[3] = 10^4
#p[4] = 10^6
{'primary':0x3, 'secondary':0x8, 'name':'Gesamtbrennstoffmengenzähle lesen'},
{'primary':''},
]
def formatHex(data):
return " ".join(map(lambda byte: "%.2x"%ord(byte), data))
def getDsc(address):
dev=filter(lambda dev: dev['address'] == address, deviceDescription)
if len(dev)>0:
return dev[0]['description']
else:
return None
class EbusPacket(object):
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 name(self):
desc = filter(lambda p: p['primary'] == self.primary_command \
and p['secondary'] == self.secondary_command, packetDescription)
if len(desc) > 0:
return desc[0]['name']
else:
return "UNKNOWN"
def __str__(self):
return "<%-18s name=\"%-15s\" source=\"%s\" destination=\"%s\" primary=0x%x secondary=0x%x>" % \
(self.__class__.__name__, self.name(), getDsc(self.source), getDsc(self.destination), \
self.primary_command, self.secondary_command)
class EbusMasterMaster(EbusPacket):
def __init__(self, source, destination, primary_command, secondary_command, data):
EbusPacket.__init__(self, source, destination, primary_command, secondary_command)
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.request = request
self.response = response
class EbusBroadcast(EbusPacket):
def __init__(self, source, destination, primary_command, secondary_command, data):
EbusPacket.__init__(self, source, destination, primary_command, secondary_command)
self.data = data
class Fetcher(asynchat.async_chat):
def __init__(self):
self.buffer = ""
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 = ""
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,data):
if len(data) < 2:
print "GAGA"
return
source = ord(data[0])
destination = ord(data[1])
sourceDevice = filter(lambda dev: dev['address'] == source, deviceDescription)
destinationDevice = filter(lambda dev: dev['address'] == destination, deviceDescription)
if len(sourceDevice) == 0 or len(destinationDevice) == 0:
print "Unbekanntes Paket: source=%x destination=%x" % (source, destination)
return
if len(data) < 9:
print "Unvollständige Daten"
return
primaryCommand = ord(data[3])
secondaryCommand = ord(data[4])
payloadLength = ord(data[5])
payload = data[6:6+payloadLength]
p = None
if sourceDevice[0]['type'] == 'master' and destinationDevice[0]['type'] == 'master':
p = EbusMasterMaster(source, destination, primaryCommand, secondaryCommand, payload)
print p
print "payload=%s" % formatHex(payload)
elif sourceDevice[0]['type'] == 'master' and destinationDevice[0]['type'] == 'slave':
p = EbusMasterSlave(source, destination, primaryCommand, secondaryCommand, None, None)
print p
elif sourceDevice[0]['type'] == 'master' and destinationDevice[0]['type'] == 'broadcast':
p = EbusBroadcast(source, destination, primaryCommand, secondaryCommand, payload)
print p
print "payload=%s" % formatHex(payload)
else:
print "KOMISCHES ZEUG"
return
Fetcher()
asyncore.loop()
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