def _rbytes2str(data):
if isinstance(data, tuple):
data = list(data)
return tuple(_rbytes2str(b) for b in data)
elif isinstance(data, bytes):
return bytes2str(data)
else:
return data
def _rbytes2str(data):
if isinstance(data, tuple):
data = list(data)
return tuple(_rbytes2str(b) for b in data)
elif isinstance(data, bytes):
return bytes2str(data)
else:
return data
def _send_command(self, command, **params):
# Page 38-39
parameters = []
for param, value in sorted(params.items()):
if isinstance(value, Decimal):
value = ('%.03f' % value).replace('.', ',')
elif isinstance(value, bytes):
value = '"%s"' % bytes2str(value)
elif isinstance(value, str):
value = '"%s"' % value
elif isinstance(value, bool):
if value is False:
value = 'f'
elif value is True:
value = 't'
elif isinstance(value, datetime.date):
value = value.strftime('#%d/%m/%y#')
parameters.append('%s=%s' % (param, value))
reply = self.writeline("%d;%s;%s;" % (self._command_id,
command,
' '.join(parameters)))
if reply[0] != '{':
# This happened once after the first command issued after
# the power returned, it should probably be handled gracefully
raise AssertionError(repr(reply))
# Page 39
sections = reply[1:].split(';')
if len(sections) != 4:
raise AssertionError
retdict = self._parse_return_value(sections[2])
errorcode = int(sections[1])
if errorcode != 0:
errordesc = retdict['Circunstancia']
try:
exception = self.errors_dict[errorcode]
except KeyError:
raise DriverError(errordesc, errorcode)
raise exception(errordesc, errorcode)
return retdict
def _create_packet(self, command):
"""
Create a 'pre-package' (command + params, basically) and involves
it around STX, NB and CS::
1 2 n 2
+-----+------+-----------------+----+
| STX | NB | 0x1C + command | CS |
+-----+------+-----------------+----+
Where:
STX: 'Transmission Start' indicator byte
NB: 2 bytes, big endian length of command + CS (2 bytes)
CS: 2 bytes, big endian checksum for command
"""
command = chr(self.CMD_PROTO) + command
packet = struct.pack('<bH%dsH' % len(command), STX,
len(command) + 2, str2bytes(command),
sum([ord(i) for i in command]))
return bytes2str(packet)
def _create_packet(self, command):
"""
Create a 'pre-package' (command + params, basically) and involves
it around STX, NB and CS::
1 2 n 2
+-----+------+-----------------+----+
| STX | NB | 0x1C + command | CS |
+-----+------+-----------------+----+
Where:
STX: 'Transmission Start' indicator byte
NB: 2 bytes, big endian length of command + CS (2 bytes)
CS: 2 bytes, big endian checksum for command
"""
command = chr(self.CMD_PROTO) + command
packet = struct.pack(
'<bH%dsH' % len(command),
STX,
len(command) + 2,
str2bytes(command),
sum([ord(i) for i in command]))
return bytes2str(packet)
def read(self, n_bytes):
# stoqdrivers is expecting str but pyserial will reply with bytes
data = self._port.read(n_bytes)
return bytes2str(data)