def encode(self):
''' Encodes response pdu
:returns: The encoded packet message
'''
result = pack_bitstring(self.bits)
packet = struct.pack(">B", len(result)) + result
return packet
def encode(self):
''' Encodes response pdu
:returns: The encoded packet message
'''
result = pack_bitstring(self.bits)
packet = struct.pack(">B", len(result)) + result
return packet
def execute(self, *args):
''' Execute the diagnostic request on the given device
:returns: The initialized response message
'''
#if _MCB.isListenOnly():
register = pack_bitstring(_MCB.getDiagnosticRegister())
return ReturnDiagnosticRegisterResponse(register)
def execute(self, *args):
''' Execute the diagnostic request on the given device
:returns: The initialized response message
'''
#if _MCB.isListenOnly():
register = pack_bitstring(_MCB.getDiagnosticRegister())
return ReturnDiagnosticRegisterResponse(register)
def encode(self):
''' Encodes the status bits to an event message
:returns: The encoded event message
'''
bits = [False] * 3
bits += [self.overrun, self.listen, self.broadcast, True]
packet = pack_bitstring(bits)
return packet
def encode(self):
''' Encodes the status bits to an event message
:returns: The encoded event message
'''
bits = [False] * 3
bits += [self.overrun, self.listen, self.broadcast, True]
packet = pack_bitstring(bits)
return packet
def encode(self):
''' Encodes write coils request
:returns: The byte encoded message
'''
count = len(self.values)
self.byte_count = (count + 7) // 8
packet = struct.pack('>HHB', self.address, count, self.byte_count)
packet += pack_bitstring(self.values)
return packet
def encode(self):
''' Encodes write coils request
:returns: The byte encoded message
'''
count = len(self.values)
self.byte_count = (count + 7) // 8
packet = struct.pack('>HHB', self.address, count, self.byte_count)
packet += pack_bitstring(self.values)
return packet
def encode(self):
''' Encodes the status bits to an event message
:returns: The encoded event message
'''
bits = [self.read, self.slave_abort, self.slave_busy,
self.slave_nak, self.write_timeout, self.listen]
bits += [True, False]
packet = pack_bitstring(bits)
return packet
def add_bits(self, values):
''' Adds a collection of bits to be encoded
If these are less than a multiple of eight,
they will be left padded with 0 bits to make
it so.
:param value: The value to add to the buffer
'''
value = pack_bitstring(values)
self._payload.append(value)
def add_bits(self, values):
""" Adds a collection of bits to be encoded
If these are less than a multiple of eight,
they will be left padded with 0 bits to make
it so.
:param value: The value to add to the buffer
"""
value = pack_bitstring(values)
self._payload.append(value)
def encode(self):
''' Encodes the status bits to an event message
:returns: The encoded event message
'''
bits = [
self.read, self.slave_abort, self.slave_busy, self.slave_nak,
self.write_timeout, self.listen
]
bits += [True, False]
packet = pack_bitstring(bits)
return packet
def fromCoils(coils, endian=Endian.Little):
''' Initialize a payload decoder with the result of
reading a collection of coils from a modbus device.
The coils are treated as a list of bit(boolean) values.
:param coils: The coil results to initialize with
:param endian: The endianess of the payload
:returns: An initialized PayloadDecoder
'''
if isinstance(coils, list):
payload = pack_bitstring(coils)
return ModiconPayloadDecoder(payload, endian)
raise ParameterException('Invalid collection of coils supplied')
def fromCoils(klass, coils, byteorder=Endian.Little):
""" Initialize a payload decoder with the result of
reading a collection of coils from a modbus device.
The coils are treated as a list of bit(boolean) values.
:param coils: The coil results to initialize with
:param byteorder: The endianess of the payload
:returns: An initialized PayloadDecoder
"""
if isinstance(coils, list):
payload = pack_bitstring(coils)
return klass(payload, byteorder)
raise ParameterException('Invalid collection of coils supplied')
def fromCoils(klass, coils, byteorder=Endian.Little, wordorder=Endian.Big):
""" Initialize a payload decoder with the result of
reading a collection of coils from a modbus device.
The coils are treated as a list of bit(boolean) values.
:param coils: The coil results to initialize with
:param byteorder: The endianess of the payload
:returns: An initialized PayloadDecoder
"""
if isinstance(coils, list):
payload = b''
padding = len(coils) % 8
if padding: # Pad zero's
extra = [False] * padding
coils = extra + coils
chunks = klass.bit_chunks(coils)
for chunk in chunks:
payload += pack_bitstring(chunk[::-1])
return klass(payload, byteorder)
raise ParameterException('Invalid collection of coils supplied')
def fromCoils(klass, coils, byteorder=Endian.Little, wordorder=Endian.Big):
""" Initialize a payload decoder with the result of
reading a collection of coils from a modbus device.
The coils are treated as a list of bit(boolean) values.
:param coils: The coil results to initialize with
:param byteorder: The endianess of the payload
:returns: An initialized PayloadDecoder
"""
if isinstance(coils, list):
payload = b''
padding = len(coils) % 8
if padding: # Pad zero's
extra = [False] * padding
coils = extra + coils
chunks = klass.bit_chunks(coils)
for chunk in chunks:
payload += pack_bitstring(chunk[::-1])
return klass(payload, byteorder)
raise ParameterException('Invalid collection of coils supplied')
def __set_bit(self, key, offset, values):
'''
:param key: The key prefix to use
:param offset: The address offset to start at
:param values: The values to set
'''
count = len(values)
s = divmod(offset, self.__bit_size)[0]
e = divmod(offset + count, self.__bit_size)[0]
value = pack_bitstring(values)
current = self.__get_bit_values(key, offset, count)
current = (r or self.__bit_default for r in current)
current = ''.join(current)
current = current[0:offset] + value + current[offset + count:]
final = (current[s:s + self.__bit_size] for s in range(0, count, self.__bit_size))
key = self.__get_prefix(key)
request = ('%s:%s' % (key, v) for v in range(s, e + 1))
request = dict(zip(request, final))
self.client.mset(request)
def testBitPacking(self):
''' Test all string <=> bit packing functions '''
self.assertEqual(unpack_bitstring('\x55'), self.bits)
self.assertEqual(pack_bitstring(self.bits), '\x55')
def testBitPacking(self):
''' Test all string <=> bit packing functions '''
self.assertEqual(unpack_bitstring('\x55'), self.bits)
self.assertEqual(pack_bitstring(self.bits), '\x55')