def build(self):
self._logger.debug('building message')
buffer = []
data_length = len(self.__datas)
opt_length = len(self.__optDatas)
#sync byte
buffer.append(self.__syncByte) # adding sync byte
#header
buffer.append((data_length >> 8) & 0xFF) #first byte length data
buffer.append(data_length & 0xFF) #second byte length data
buffer.append(opt_length & 0xFF) #optionnal data length
buffer.append(self.__type & 0xFF) #packet type byte
#CRC Header
buffer.append(CRC8Utils.calc(buffer[1:5]))
#data
buffer += self.__datas
buffer += self.__optDatas
#CRC Data
buffer.append(CRC8Utils.calc(buffer[6:]))
self._logger.debug('buffer : {0}'.format(buffer))
return buffer
def build(self):
self._logger.debug("building message")
buffer = []
data_length = len(self.__datas)
opt_length = len(self.__optDatas)
# sync byte
buffer.append(self.__syncByte) # adding sync byte
# header
buffer.append((data_length >> 8) & 0xFF) # first byte length data
buffer.append(data_length & 0xFF) # second byte length data
buffer.append(opt_length & 0xFF) # optionnal data length
buffer.append(self.__type & 0xFF) # packet type byte
# CRC Header
buffer.append(CRC8Utils.calc(buffer[1:5]))
# data
buffer += self.__datas
buffer += self.__optDatas
# CRC Data
buffer.append(CRC8Utils.calc(buffer[6:]))
self._logger.debug("buffer : {0}".format(buffer))
return buffer
def _getSerialData(self):
self._logger.debug('searching for sync byte')
s = 0
while s != b'\x55':
if self.__connection.inWaiting() != 0:
s = self.__connection.read(1)
self._logger.debug('sync byte found')
while self.__connection.inWaiting() < 5:
()
header = self.__connection.read(4) #read header fields
headerCRC = self.__connection.read(1)[0] #read header crc field
self._logger.debug('header reading : {0} and crc : {1}'.format(header, headerCRC))
if (CRC8Utils.calc(header) == headerCRC):
self._logger.debug('header CRC OK')
data_length, opt_length, msgType = struct.unpack("!HBB", header)
self._logger.debug('data_length {0}; opt_length {1}; msg_type {2}'.format( data_length, opt_length, msgType ))
totalDataLength = data_length + opt_length
while self.__connection.inWaiting() < totalDataLength+1:
()
datas = self.__connection.read(data_length)
opts = self.__connection.read(opt_length)
dataCRC = self.__connection.read(1)
self._logger.debug('datas {0}; opts {1}; dataCRC {2}'.format( datas, opts, dataCRC ))
if(self._logger.isEnabledFor(logging.DEBUG)):
msg = header
msg += bytes({headerCRC})
msg += datas
msg += opts
msg += dataCRC
self._logger.debug(msg)
if (CRC8Utils.calc(datas+opts) == dataCRC[0]):
return EnOceanMessage(msgType, datas, opts)
return "Data CRC Failed"
return "Header CRC Failed"
from rhum.utils.crc8 import CRC8Utils
print(CRC8Utils.check('test', 0xb9))
print(CRC8Utils.check('test', 0xb5))
from rhum.utils.crc8 import CRC8Utils
print(CRC8Utils.check('test', 0xb9));
print(CRC8Utils.check('test', 0xb5));
