def writePackets(self, pkts):
"""
write all pkt in pkts into the log
@param pkts: items to write
@return: None
"""
for i in pkts:#i是单个字典形式的要发送的数据包， pkts是从队列里取出来的字典的列表[{},{},{}]
p = self.cmdPack.pack(i)#p是经过处理打包过后的十六进制字符流
logging.debug(_("Write Packet to Serial Port; [%s] with Binary Data [%s]"), i, str2hex(p))
if self.device:
print repr(p)#打印十六进制流
self.device.write(p)
else:
logging.error(_("Fail to Write Packet to Serial port; Device=%s, which is closed or None"), self.device)
def unpackField(self, msg, packet, rules):
"""
internal function, used for unpack all fields from packet according to a rule
@param msg: python dict
@param packet: octet packet
@param rules: dict, like self.commonField
"""
"""
========fc.commonFieldOnly==============
[{'begin': 5, 'end': None, 'name': u'Length', 'format': '', 'title': u'Length', 'type': u'uint8'}, {'begin': 6, 'end': None, 'name': u'Cluster', 'format': '', 'title': u'Cluster', 'type': u'uint8'}, {'begin': 7, 'end': None, 'name': u'Type', 'format': '', 'title': u'Type', 'type': u'uint8'}, {'begin': 8, 'end': None, 'name': u'SubType', 'format': '', 'title': u'SubType', 'type': u'uint8'}, {'begin': 9, 'end': None, 'name': u'Data', 'format': u'hex', 'title': u'Data', 'type': u'binary'}]
"""
print rules
for i in rules:
name = i["name"]
fbegin = i["begin"]
fend = i["end"]
ftype = i["type"]
try:
s = self.structParser.unpack(ftype, packet[fbegin:fend] )
except:
logging.error("Unpack Error for Packet=[%s] with Format=%s @ field name=%s", str2hex(packet), rules, name)
## raise
msg[name] = s