Example #1
0
    def _reconfigurePort(self):
        """Set communication parameters on opened port."""
        if not self.hComPort:
            raise SerialException("Can only operate on a valid port handle")

        # Set Windows timeout values
        # timeouts is a tuple with the following items:
        # (ReadIntervalTimeout,ReadTotalTimeoutMultiplier,
        #  ReadTotalTimeoutConstant,WriteTotalTimeoutMultiplier,
        #  WriteTotalTimeoutConstant)
        if self._timeout is None:
            timeouts = (0, 0, 0, 0, 0)
        elif self._timeout == 0:
            timeouts = (win32.MAXDWORD, 0, 0, 0, 0)
        else:
            timeouts = (0, 0, int(self._timeout*1000), 0, 0)
        if self._timeout != 0 and self._interCharTimeout is not None:
            timeouts = (int(self._interCharTimeout * 1000),) + timeouts[1:]

        if self._writeTimeout is None:
            pass
        elif self._writeTimeout == 0:
            timeouts = timeouts[:-2] + (0, win32.MAXDWORD)
        else:
            timeouts = timeouts[:-2] + (0, int(self._writeTimeout*1000))
        win32.SetCommTimeouts(self.hComPort, ctypes.byref(win32.COMMTIMEOUTS(*timeouts)))

        win32.SetCommMask(self.hComPort, win32.EV_ERR)

        # Setup the connection info.
        # Get state and modify it:
        comDCB = win32.DCB()
        win32.GetCommState(self.hComPort, ctypes.byref(comDCB))
        comDCB.BaudRate = self._baudrate

        if self._bytesize == FIVEBITS:
            comDCB.ByteSize     = 5
        elif self._bytesize == SIXBITS:
            comDCB.ByteSize     = 6
        elif self._bytesize == SEVENBITS:
            comDCB.ByteSize     = 7
        elif self._bytesize == EIGHTBITS:
            comDCB.ByteSize     = 8
        else:
            raise ValueError("Unsupported number of data bits: %r" % self._bytesize)

        if self._parity == PARITY_NONE:
            comDCB.Parity       = win32.NOPARITY
            comDCB.fParity      = 0 # Disable Parity Check
        elif self._parity == PARITY_EVEN:
            comDCB.Parity       = win32.EVENPARITY
            comDCB.fParity      = 1 # Enable Parity Check
        elif self._parity == PARITY_ODD:
            comDCB.Parity       = win32.ODDPARITY
            comDCB.fParity      = 1 # Enable Parity Check
        elif self._parity == PARITY_MARK:
            comDCB.Parity       = win32.MARKPARITY
            comDCB.fParity      = 1 # Enable Parity Check
        elif self._parity == PARITY_SPACE:
            comDCB.Parity       = win32.SPACEPARITY
            comDCB.fParity      = 1 # Enable Parity Check
        else:
            raise ValueError("Unsupported parity mode: %r" % self._parity)

        if self._stopbits == STOPBITS_ONE:
            comDCB.StopBits     = win32.ONESTOPBIT
        elif self._stopbits == STOPBITS_ONE_POINT_FIVE:
            comDCB.StopBits     = win32.ONE5STOPBITS
        elif self._stopbits == STOPBITS_TWO:
            comDCB.StopBits     = win32.TWOSTOPBITS
        else:
            raise ValueError("Unsupported number of stop bits: %r" % self._stopbits)

        comDCB.fBinary          = 1 # Enable Binary Transmission
        # Char. w/ Parity-Err are replaced with 0xff (if fErrorChar is set to TRUE)
        if self._rtscts:
            comDCB.fRtsControl  = win32.RTS_CONTROL_HANDSHAKE
        elif self._rtsToggle:
            comDCB.fRtsControl  = win32.RTS_CONTROL_TOGGLE
        else:
            comDCB.fRtsControl  = self._rtsState
        if self._dsrdtr:
            comDCB.fDtrControl  = win32.DTR_CONTROL_HANDSHAKE
        else:
            comDCB.fDtrControl  = self._dtrState

        if self._rtsToggle:
            comDCB.fOutxCtsFlow     = 0
        else:
            comDCB.fOutxCtsFlow     = self._rtscts
        comDCB.fOutxDsrFlow     = self._dsrdtr
        comDCB.fOutX            = self._xonxoff
        comDCB.fInX             = self._xonxoff
        comDCB.fNull            = 0
        comDCB.fErrorChar       = 0
        comDCB.fAbortOnError    = 0
        comDCB.XonChar          = XON
        comDCB.XoffChar         = XOFF

        if not win32.SetCommState(self.hComPort, ctypes.byref(comDCB)):
            raise ValueError("Cannot configure port, some setting was wrong. Original message: %r" % ctypes.WinError())
Example #2
0
    def _reconfigure_port(self):
        """Set communication parameters on opened port."""
        if not self._port_handle:
            raise SerialException("Can only operate on a valid port handle")

        # Set Windows timeout values
        # timeouts is a tuple with the following items:
        # (ReadIntervalTimeout,ReadTotalTimeoutMultiplier,
        #  ReadTotalTimeoutConstant,WriteTotalTimeoutMultiplier,
        #  WriteTotalTimeoutConstant)
        timeouts = win32.COMMTIMEOUTS()
        if self._timeout is None:
            pass  # default of all zeros is OK
        elif self._timeout == 0:
            timeouts.ReadIntervalTimeout = win32.MAXDWORD
        else:
            timeouts.ReadTotalTimeoutConstant = max(int(self._timeout * 1000),
                                                    1)
        if self._timeout != 0 and self._inter_byte_timeout is not None:
            timeouts.ReadIntervalTimeout = max(
                int(self._inter_byte_timeout * 1000), 1)

        if self._write_timeout is None:
            pass
        elif self._write_timeout == 0:
            timeouts.WriteTotalTimeoutConstant = win32.MAXDWORD
        else:
            timeouts.WriteTotalTimeoutConstant = max(
                int(self._write_timeout * 1000), 1)
        win32.SetCommTimeouts(self._port_handle, ctypes.byref(timeouts))

        win32.SetCommMask(self._port_handle, win32.EV_ERR)

        # Setup the connection info.
        # Get state and modify it:
        comDCB = win32.DCB()
        win32.GetCommState(self._port_handle, ctypes.byref(comDCB))
        comDCB.BaudRate = self._baudrate

        if self._bytesize == serial.FIVEBITS:
            comDCB.ByteSize = 5
        elif self._bytesize == serial.SIXBITS:
            comDCB.ByteSize = 6
        elif self._bytesize == serial.SEVENBITS:
            comDCB.ByteSize = 7
        elif self._bytesize == serial.EIGHTBITS:
            comDCB.ByteSize = 8
        else:
            raise ValueError("Unsupported number of data bits: {!r}".format(
                self._bytesize))

        if self._parity == serial.PARITY_NONE:
            comDCB.Parity = win32.NOPARITY
            comDCB.fParity = 0  # Disable Parity Check
        elif self._parity == serial.PARITY_EVEN:
            comDCB.Parity = win32.EVENPARITY
            comDCB.fParity = 1  # Enable Parity Check
        elif self._parity == serial.PARITY_ODD:
            comDCB.Parity = win32.ODDPARITY
            comDCB.fParity = 1  # Enable Parity Check
        elif self._parity == serial.PARITY_MARK:
            comDCB.Parity = win32.MARKPARITY
            comDCB.fParity = 1  # Enable Parity Check
        elif self._parity == serial.PARITY_SPACE:
            comDCB.Parity = win32.SPACEPARITY
            comDCB.fParity = 1  # Enable Parity Check
        else:
            raise ValueError("Unsupported parity mode: {!r}".format(
                self._parity))

        if self._stopbits == serial.STOPBITS_ONE:
            comDCB.StopBits = win32.ONESTOPBIT
        elif self._stopbits == serial.STOPBITS_ONE_POINT_FIVE:
            comDCB.StopBits = win32.ONE5STOPBITS
        elif self._stopbits == serial.STOPBITS_TWO:
            comDCB.StopBits = win32.TWOSTOPBITS
        else:
            raise ValueError("Unsupported number of stop bits: {!r}".format(
                self._stopbits))

        comDCB.fBinary = 1  # Enable Binary Transmission
        # Char. w/ Parity-Err are replaced with 0xff (if fErrorChar is set to TRUE)
        if self._rs485_mode is None:
            if self._rtscts:
                comDCB.fRtsControl = win32.RTS_CONTROL_HANDSHAKE
            else:
                comDCB.fRtsControl = win32.RTS_CONTROL_ENABLE if self._rts_state else win32.RTS_CONTROL_DISABLE
            comDCB.fOutxCtsFlow = self._rtscts
        else:
            # checks for unsupported settings
            # XXX verify if platform really does not have a setting for those
            if not self._rs485_mode.rts_level_for_tx:
                raise ValueError(
                    'Unsupported value for RS485Settings.rts_level_for_tx: {!r}'
                    .format(self._rs485_mode.rts_level_for_tx, ))
            if self._rs485_mode.rts_level_for_rx:
                raise ValueError(
                    'Unsupported value for RS485Settings.rts_level_for_rx: {!r}'
                    .format(self._rs485_mode.rts_level_for_rx, ))
            if self._rs485_mode.delay_before_tx is not None:
                raise ValueError(
                    'Unsupported value for RS485Settings.delay_before_tx: {!r}'
                    .format(self._rs485_mode.delay_before_tx, ))
            if self._rs485_mode.delay_before_rx is not None:
                raise ValueError(
                    'Unsupported value for RS485Settings.delay_before_rx: {!r}'
                    .format(self._rs485_mode.delay_before_rx, ))
            if self._rs485_mode.loopback:
                raise ValueError(
                    'Unsupported value for RS485Settings.loopback: {!r}'.
                    format(self._rs485_mode.loopback, ))
            comDCB.fRtsControl = win32.RTS_CONTROL_TOGGLE
            comDCB.fOutxCtsFlow = 0

        if self._dsrdtr:
            comDCB.fDtrControl = win32.DTR_CONTROL_HANDSHAKE
        else:
            comDCB.fDtrControl = win32.DTR_CONTROL_ENABLE if self._dtr_state else win32.DTR_CONTROL_DISABLE
        comDCB.fOutxDsrFlow = self._dsrdtr
        comDCB.fOutX = self._xonxoff
        comDCB.fInX = self._xonxoff
        comDCB.fNull = 0
        comDCB.fErrorChar = 0
        comDCB.fAbortOnError = 0
        comDCB.XonChar = serial.XON
        comDCB.XoffChar = serial.XOFF

        if not win32.SetCommState(self._port_handle, ctypes.byref(comDCB)):
            raise SerialException(
                'Cannot configure port, something went wrong. '
                'Original message: {!r}'.format(ctypes.WinError()))