foo

1 files changed, 31 insertions, 158 deletions

diff --git a/ebus/__init__.py b/ebus/__init__.py
index 23e6595..832e9ff 100644
--- a/ebus/__init__.py
+++ b/ebus/__init__.py
@@ -8,102 +8,7 @@ import os
 from lxml import objectify
 from lxml import etree
 
-"""ebus specific data field formats"""
-class fields:
-    class DataField(object):
-        def __init__(self, name, offset):
-            self.name = name
-            self.offset = offset
-        def value(self,data):
-            raise NotImplemented()
-
-    class Data1b(DataField):
-        """
-        Beispiel für die Berechnung:
-        if ((x & 80h) == 80h) // y negativ
-            y = - [dez(!x) + 1]
-        else 
-            y = dez(x)
-        """
-        def value(self,data):
-            x=ord(data[self.offset])
-            if x & 0x80 == 0x80:
-                return (-1) * (0xff^x + 1)
-            else:
-                return x
- 
-    class Data1c(DataField):
-        def value(self,data):
-            return ord(data[self.offset])/2.0
-
-    class Data2c(DataField):
-        """
-        Beispiel für die Berechnung:
-            if ((x & 8000h) == 8000h) // y negativ
-                y = - [dez(High_Byte(!x)) 16 + dez(High_Nibble (Low_Byte (!x)))
-                    + (dez(Low_Nibble (Low_Byte (!x))) +1 ) / 16]
-            else                       // y positiv
-                y = dez(High_Byte(x)) 16 + dez(High_ Nibble (Low Byte (x)))
-                    + dez(Low_ Nibble (Low Byte (x))) / 16
-        """
-        def value(self,data):
-            highByte = ord(data[self.offset+1])
-            lowByte= ord(data[self.offset])
-            if (0x8000 & (highByte<<8 | lowByte)) == 0x8000:
-                return (-1) * ( (0xff^highByte)*16 + (0xff^(lowByte>>4)) + (0x0ff^(0xf&lowByte) + 1)/16.0 )
-            else:
-                return highByte*16 + (lowByte>>4) + (lowByte&0xf)/16.0
-
-    class Data2b(DataField):
-        """
-        if ((x&8000h) == 8000h) // y negativ
-              y = - [dez(High_Byte(!x)) + (dez(Low_Byte(!x)) + 1) / 256]
-        else                        // y positiv
-              y = dez(High_Byte (x)) + dez(Low_Byte (x)) / 256
-        """
-        def value(self,data):
-            highByte = ord(data[self.offset+1])
-            lowByte= ord(data[self.offset])
-            if (0x8000 & (highByte<<8 | lowByte)) == 0x8000:
-                return (-1) * ((0xff^highByte) + (0xff^lowByte+1)/256.0)
-            else:
-                return highByte + lowByte/256.0
-
-    class Bit(DataField):
-        def value(self, data):
-            return ord(data[self.offset]) == 0x1
-
-    class Word(DataField):
-        def value(self, data):
-            lb, hb = data[self.offset], data[self.offset+1]
-            return ord(lb) + (ord(hb)<<8)
-    
-    class Bcd(DataField):
-        """
-        y = dez(High_Nibble(x))*10 + dez(Low_Nibble(x))
-        """
-        def value(self, data):
-            byte = ord(data[self.offset])
-            return (byte >> 4) * 10 + (byte & 0xf)
-
-    class Byte(DataField):
-        def value(self, data):
-            return ord(data[self.offset])
-
-
-    class ByteEnum(DataField):
-        def __init__(self, name, offset, values):
-            fields.DataField.__init__(self, name, offset)
-            self.values = values
-
-        def value(self, data):
-            value = ord(data[self.offset])
-            if self.values.has_key(value):
-                return self.values[value]
-            else:
-                return None
-
-class EbusXMLMixin(object):
+class EbusPacket(object):
     EBUS_SPECIFICATION = os.path.join(os.path.dirname(__file__), "ebus_specification.xml")
     ebus_xml = objectify.parse(open(EBUS_SPECIFICATION))
 
@@ -113,83 +18,46 @@ class EbusXMLMixin(object):
                                                                   address="#x%.2x"%address)]
         return len(d)>0 and d[0] or None
 
-    def _get_packet(self):
+    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 %s>" % \
+            (self.__class__.__name__, self.name(), self.source, self.destination, \
+             self.primary_command, self.secondary_command, self.length, \
+             " ".join(map(lambda name: "%s=%s" % (name, self.values()[name]),self.values())))
+
+    def get_packet_description(self):
         p=EbusXMLMixin.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:
-            return None
+            raise "Unknown Packet, primary_command=#x%.2 secondary_command=#x%.2" % (
+                self.primary_command,
+                self.secondardy_command)
 
-    def _get_source(self):
+    def _get_source_name(self):
         s=EbusXMLMixin.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(self):
+    def _get_destination_name(self):
         d=EbusXMLMixin.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().get("name")
+        return self.get_packet_description().get("name")
 
     def description(self):
-        return self._get_packet().get("description")
-
-    def format(self):
-        packet = self._get_packet()
-        if packet is not None:
-            for field in packet.fields.iterchildren():
-                name = field.get("name")
-                offset = field.get("offset")
-                if not name:
-                    continue
-                elif field.tag == "bit":
-                    yield fields.Bit( name, int(offset) )
-                elif field.tag == "byte":
-                    yield fields.Byte( name, int(offset) )
-                elif field.tag == "word":
-                    yield fields.Word( name, int(offset) )
-                elif field.tag == "data1b":
-                    yield fields.Data1b( name, int(offset) )
-                elif field.tag == "data1c":
-                    yield fields.Data1c( name, int(offset) )
-                elif field.tag == "data2b":
-                    yield fields.Data2b( name, int(offset) )
-                elif field.tag == "data2c":
-                    yield fields.Data2c( name, int(offset) )
-                elif field.tag == "bcd":
-                    yield fields.Bcd( name, int(offset) )
-                elif field.tag == "byteEnum":
-                    options = dict(map(lambda opt: ( int(opt.get("value")[2:],16), opt.get("name")),
-                                      field.xpath("./option")))
-                    yield fields.ByteEnum( name, int(offset), options)
-                else:
-                    print "error: %s in %s" % (name, self.name())
-
-
-def formatHex(data):
-    return " ".join(map(lambda byte: "%.2x"%ord(byte), data))
-
-class EbusPacket(EbusXMLMixin):
-    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
+        return self.get_packet_description().get("description")
 
-    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 %s>" % \
-            (self.__class__.__name__, self.name(), self.source, self.destination, \
-             self.primary_command, self.secondary_command, self.length, \
-             " ".join(map(lambda name: "%s=%s" % (name, self.values()[name]),self.values())))
-
-    def values(self):
-        return dict( map(lambda format: (format.name, format.value(self.data) ),
-                         self.format() ))
 
 class EbusMasterMaster(EbusPacket):
     def __init__(self, source, destination, primary_command, secondary_command, data):
@@ -269,9 +137,15 @@ class EbusReader(asynchat.async_chat):
         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,formatHex(payload))
+            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)))
+
 
-        p = None
         if sourceType == 'master' and destinationType == 'master':
             p = EbusMasterMaster(source, destination, primaryCommand, secondaryCommand, payload)
             self.handle_ebus(p)
@@ -282,8 +156,7 @@ class EbusReader(asynchat.async_chat):
             p = EbusBroadcast(source, destination, primaryCommand, secondaryCommand, payload)
             self.handle_ebus(p)
         else:
-            print >>sys.stderr, "KOMISCHES ZEUG"
-            print >>sys.stderr, "source=%s sourceType=%s destination=%s destType=%s" % \
+            print >>sys.stderr, "SKIP source=%s sourceType=%s destination=%s destType=%s" % \
                 (source, sourceType, destination, destinationType)
 
     def handle_ebus(self,ebus_packet):