def _set_hidKeyboardInput(self, state):
rawState = not state
if self.isHid:
# Make sure the device settings are up to date.
keySettings: int = self._dev.getFeature(
ALVA_KEY_SETTINGS_REPORT)[ALVA_KEY_SETTINGS_POS]
# Try to update the state
if rawState:
newKeySettings = intToByte(keySettings
| ALVA_KEY_RAW_INPUT_MASK)
elif keySettings & ALVA_KEY_RAW_INPUT_MASK:
newKeySettings = intToByte(keySettings
^ ALVA_KEY_RAW_INPUT_MASK)
else:
newKeySettings = intToByte(keySettings)
self._dev.setFeature(ALVA_KEY_SETTINGS_REPORT + newKeySettings)
# Check whether the state has been changed successfully.
# If not, this device does not support this feature.
keySettings: int = self._dev.getFeature(
ALVA_KEY_SETTINGS_REPORT)[ALVA_KEY_SETTINGS_POS]
# Save the new state
self._rawKeyboardInput = bool(keySettings
& ALVA_KEY_RAW_INPUT_MASK)
else:
self._ser6SendMessage(cmd=b"r", value=boolToByte(rawState))
self._ser6SendMessage(b"r", b"?")
for i in range(3):
self._dev.waitForRead(self.timeout)
if rawState is self._rawKeyboardInput:
break
def _sendRequest(self, command: bytes, arg: Union[bytes, bool, int] = b""):
"""
:type command: bytes
:type arg: bytes | bool | int
"""
typeErrorString = "Expected param '{}' to be of type '{}', got '{}'"
if not isinstance(arg, bytes):
if isinstance(arg, bool):
arg = boolToByte(arg)
elif isinstance(arg, int):
arg = intToByte(arg)
else:
raise TypeError(
typeErrorString.format("arg", "bytes, bool, or int",
type(arg).__name__))
if not isinstance(command, bytes):
raise TypeError(
typeErrorString.format("command", "bytes",
type(command).__name__))
if self.isHid:
self._dev.write(command + arg)
else:
arg = arg.replace(ESCAPE, ESCAPE * 2)
data = b"".join([ESCAPE, command, arg])
self._dev.write(data)
def _set_atc(self, state):
if self._atc is state:
return
if isinstance(self._model,AtcMixin):
self.sendExtendedPacket(HT_EXTPKT_SET_ATC_MODE, boolToByte(state))
else:
log.debugWarning("Changing ATC setting for unsupported device %s"%self._model.name)
# Regardless whether this setting is supported or not, we want to safe its state.
self._atc = state
def terminate(self):
try:
super(BrailleDisplayDriver, self).terminate()
try:
self._sendRequest(BAUM_PROTOCOL_ONOFF, boolToByte(False))
except EnvironmentError:
# Some displays don't support BAUM_PROTOCOL_ONOFF.
pass
finally:
# Make sure the device gets closed.
# If it doesn't, we may not be able to re-open it later.
self._dev.close()
def _serSendMessage(self,
msgId: bytes,
payload: Union[bytes, int, bool] = b""):
if not isinstance(payload, bytes):
if isinstance(payload, int):
payload: bytes = intToByte(payload)
elif isinstance(payload, bool):
payload: bytes = boolToByte(payload)
else:
raise TypeError(
"Expected arg 'payload' to be of type 'bytes, int, or bool'"
)
data = b''.join([HEADER, msgId, intToByte(len(payload)), payload])
self._dev.write(data)
