serial/serialcli.py - platform/external/python/pyserial - Git at Google

 #! python
 #
 # Backend for .NET/Mono (IronPython), .NET >= 2
 #
 # This file is part of pySerial. https://github.com/pyserial/pyserial
 # (C) 2008-2015 Chris Liechti <cliechti@gmx.net>
 #
 # SPDX-License-Identifier:    BSD-3-Clause

 from __future__ import absolute_import

 import System
 import System.IO.Ports
 from serial.serialutil import *

 # must invoke function with byte array, make a helper to convert strings
 # to byte arrays
 sab = System.Array[System.Byte]


 def as_byte_array(string):
     return sab([ord(x) for x in string])  # XXX will require adaption when run with a 3.x compatible IronPython


 class Serial(SerialBase):
     """Serial port implementation for .NET/Mono."""

     BAUDRATES = (50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
                  9600, 19200, 38400, 57600, 115200)

     def open(self):
         """\
         Open port with current settings. This may throw a SerialException
         if the port cannot be opened.
         """
         if self._port is None:
             raise SerialException("Port must be configured before it can be used.")
         if self.is_open:
             raise SerialException("Port is already open.")
         try:
             self._port_handle = System.IO.Ports.SerialPort(self.portstr)
         except Exception as msg:
             self._port_handle = None
             raise SerialException("could not open port %s: %s" % (self.portstr, msg))

         # if RTS and/or DTR are not set before open, they default to True
         if self._rts_state is None:
             self._rts_state = True
         if self._dtr_state is None:
             self._dtr_state = True

         self._reconfigure_port()
         self._port_handle.Open()
         self.is_open = True
         if not self._dsrdtr:
             self._update_dtr_state()
         if not self._rtscts:
             self._update_rts_state()
         self.reset_input_buffer()

     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")

         #~ self._port_handle.ReceivedBytesThreshold = 1

         if self._timeout is None:
             self._port_handle.ReadTimeout = System.IO.Ports.SerialPort.InfiniteTimeout
         else:
             self._port_handle.ReadTimeout = int(self._timeout * 1000)

         # if self._timeout != 0 and self._interCharTimeout is not None:
             # timeouts = (int(self._interCharTimeout * 1000),) + timeouts[1:]

         if self._write_timeout is None:
             self._port_handle.WriteTimeout = System.IO.Ports.SerialPort.InfiniteTimeout
         else:
             self._port_handle.WriteTimeout = int(self._write_timeout * 1000)

         # Setup the connection info.
         try:
             self._port_handle.BaudRate = self._baudrate
         except IOError as e:
             # catch errors from illegal baudrate settings
             raise ValueError(str(e))

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

         if self._parity == PARITY_NONE:
             self._port_handle.Parity = getattr(System.IO.Ports.Parity, 'None')  # reserved keyword in Py3k
         elif self._parity == PARITY_EVEN:
             self._port_handle.Parity = System.IO.Ports.Parity.Even
         elif self._parity == PARITY_ODD:
             self._port_handle.Parity = System.IO.Ports.Parity.Odd
         elif self._parity == PARITY_MARK:
             self._port_handle.Parity = System.IO.Ports.Parity.Mark
         elif self._parity == PARITY_SPACE:
             self._port_handle.Parity = System.IO.Ports.Parity.Space
         else:
             raise ValueError("Unsupported parity mode: %r" % self._parity)

         if self._stopbits == STOPBITS_ONE:
             self._port_handle.StopBits = System.IO.Ports.StopBits.One
         elif self._stopbits == STOPBITS_ONE_POINT_FIVE:
             self._port_handle.StopBits = System.IO.Ports.StopBits.OnePointFive
         elif self._stopbits == STOPBITS_TWO:
             self._port_handle.StopBits = System.IO.Ports.StopBits.Two
         else:
             raise ValueError("Unsupported number of stop bits: %r" % self._stopbits)

         if self._rtscts and self._xonxoff:
             self._port_handle.Handshake = System.IO.Ports.Handshake.RequestToSendXOnXOff
         elif self._rtscts:
             self._port_handle.Handshake = System.IO.Ports.Handshake.RequestToSend
         elif self._xonxoff:
             self._port_handle.Handshake = System.IO.Ports.Handshake.XOnXOff
         else:
             self._port_handle.Handshake = getattr(System.IO.Ports.Handshake, 'None')   # reserved keyword in Py3k

     #~ def __del__(self):
         #~ self.close()

     def close(self):
         """Close port"""
         if self.is_open:
             if self._port_handle:
                 try:
                     self._port_handle.Close()
                 except System.IO.Ports.InvalidOperationException:
                     # ignore errors. can happen for unplugged USB serial devices
                     pass
                 self._port_handle = None
             self.is_open = False

     #  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -

     @property
     def in_waiting(self):
         """Return the number of characters currently in the input buffer."""
         if not self.is_open:
             raise PortNotOpenError()
         return self._port_handle.BytesToRead

     def read(self, size=1):
         """\
         Read size bytes from the serial port. If a timeout is set it may
         return less characters as requested. With no timeout it will block
         until the requested number of bytes is read.
         """
         if not self.is_open:
             raise PortNotOpenError()
         # must use single byte reads as this is the only way to read
         # without applying encodings
         data = bytearray()
         while size:
             try:
                 data.append(self._port_handle.ReadByte())
             except System.TimeoutException:
                 break
             else:
                 size -= 1
         return bytes(data)

     def write(self, data):
         """Output the given string over the serial port."""
         if not self.is_open:
             raise PortNotOpenError()
         #~ if not isinstance(data, (bytes, bytearray)):
             #~ raise TypeError('expected %s or bytearray, got %s' % (bytes, type(data)))
         try:
             # must call overloaded method with byte array argument
             # as this is the only one not applying encodings
             self._port_handle.Write(as_byte_array(data), 0, len(data))
         except System.TimeoutException:
             raise SerialTimeoutException('Write timeout')
         return len(data)

     def reset_input_buffer(self):
         """Clear input buffer, discarding all that is in the buffer."""
         if not self.is_open:
             raise PortNotOpenError()
         self._port_handle.DiscardInBuffer()

     def reset_output_buffer(self):
         """\
         Clear output buffer, aborting the current output and
         discarding all that is in the buffer.
         """
         if not self.is_open:
             raise PortNotOpenError()
         self._port_handle.DiscardOutBuffer()

     def _update_break_state(self):
         """
         Set break: Controls TXD. When active, to transmitting is possible.
         """
         if not self.is_open:
             raise PortNotOpenError()
         self._port_handle.BreakState = bool(self._break_state)

     def _update_rts_state(self):
         """Set terminal status line: Request To Send"""
         if not self.is_open:
             raise PortNotOpenError()
         self._port_handle.RtsEnable = bool(self._rts_state)

     def _update_dtr_state(self):
         """Set terminal status line: Data Terminal Ready"""
         if not self.is_open:
             raise PortNotOpenError()
         self._port_handle.DtrEnable = bool(self._dtr_state)

     @property
     def cts(self):
         """Read terminal status line: Clear To Send"""
         if not self.is_open:
             raise PortNotOpenError()
         return self._port_handle.CtsHolding

     @property
     def dsr(self):
         """Read terminal status line: Data Set Ready"""
         if not self.is_open:
             raise PortNotOpenError()
         return self._port_handle.DsrHolding

     @property
     def ri(self):
         """Read terminal status line: Ring Indicator"""
         if not self.is_open:
             raise PortNotOpenError()
         #~ return self._port_handle.XXX
         return False  # XXX an error would be better

     @property
     def cd(self):
         """Read terminal status line: Carrier Detect"""
         if not self.is_open:
             raise PortNotOpenError()
         return self._port_handle.CDHolding

     # - - platform specific - - - -
     # none
	#! python
	#
	# Backend for .NET/Mono (IronPython), .NET >= 2
	#
	# This file is part of pySerial. https://github.com/pyserial/pyserial
	# (C) 2008-2015 Chris Liechti <cliechti@gmx.net>
	#
	# SPDX-License-Identifier: BSD-3-Clause

	from __future__ import absolute_import

	import System
	import System.IO.Ports
	from serial.serialutil import *

	# must invoke function with byte array, make a helper to convert strings
	# to byte arrays
	sab = System.Array[System.Byte]


	def as_byte_array(string):
	return sab([ord(x) for x in string]) # XXX will require adaption when run with a 3.x compatible IronPython


	class Serial(SerialBase):
	"""Serial port implementation for .NET/Mono."""

	BAUDRATES = (50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
	9600, 19200, 38400, 57600, 115200)

	def open(self):
	"""\
	Open port with current settings. This may throw a SerialException
	if the port cannot be opened.
	"""
	if self._port is None:
	raise SerialException("Port must be configured before it can be used.")
	if self.is_open:
	raise SerialException("Port is already open.")
	try:
	self._port_handle = System.IO.Ports.SerialPort(self.portstr)
	except Exception as msg:
	self._port_handle = None
	raise SerialException("could not open port %s: %s" % (self.portstr, msg))

	# if RTS and/or DTR are not set before open, they default to True
	if self._rts_state is None:
	self._rts_state = True
	if self._dtr_state is None:
	self._dtr_state = True

	self._reconfigure_port()
	self._port_handle.Open()
	self.is_open = True
	if not self._dsrdtr:
	self._update_dtr_state()
	if not self._rtscts:
	self._update_rts_state()
	self.reset_input_buffer()

	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")

	#~ self._port_handle.ReceivedBytesThreshold = 1

	if self._timeout is None:
	self._port_handle.ReadTimeout = System.IO.Ports.SerialPort.InfiniteTimeout
	else:
	self._port_handle.ReadTimeout = int(self._timeout * 1000)

	# if self._timeout != 0 and self._interCharTimeout is not None:
	# timeouts = (int(self._interCharTimeout * 1000),) + timeouts[1:]

	if self._write_timeout is None:
	self._port_handle.WriteTimeout = System.IO.Ports.SerialPort.InfiniteTimeout
	else:
	self._port_handle.WriteTimeout = int(self._write_timeout * 1000)

	# Setup the connection info.
	try:
	self._port_handle.BaudRate = self._baudrate
	except IOError as e:
	# catch errors from illegal baudrate settings
	raise ValueError(str(e))

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

	if self._parity == PARITY_NONE:
	self._port_handle.Parity = getattr(System.IO.Ports.Parity, 'None') # reserved keyword in Py3k
	elif self._parity == PARITY_EVEN:
	self._port_handle.Parity = System.IO.Ports.Parity.Even
	elif self._parity == PARITY_ODD:
	self._port_handle.Parity = System.IO.Ports.Parity.Odd
	elif self._parity == PARITY_MARK:
	self._port_handle.Parity = System.IO.Ports.Parity.Mark
	elif self._parity == PARITY_SPACE:
	self._port_handle.Parity = System.IO.Ports.Parity.Space
	else:
	raise ValueError("Unsupported parity mode: %r" % self._parity)

	if self._stopbits == STOPBITS_ONE:
	self._port_handle.StopBits = System.IO.Ports.StopBits.One
	elif self._stopbits == STOPBITS_ONE_POINT_FIVE:
	self._port_handle.StopBits = System.IO.Ports.StopBits.OnePointFive
	elif self._stopbits == STOPBITS_TWO:
	self._port_handle.StopBits = System.IO.Ports.StopBits.Two
	else:
	raise ValueError("Unsupported number of stop bits: %r" % self._stopbits)

	if self._rtscts and self._xonxoff:
	self._port_handle.Handshake = System.IO.Ports.Handshake.RequestToSendXOnXOff
	elif self._rtscts:
	self._port_handle.Handshake = System.IO.Ports.Handshake.RequestToSend
	elif self._xonxoff:
	self._port_handle.Handshake = System.IO.Ports.Handshake.XOnXOff
	else:
	self._port_handle.Handshake = getattr(System.IO.Ports.Handshake, 'None') # reserved keyword in Py3k

	#~ def __del__(self):
	#~ self.close()

	def close(self):
	"""Close port"""
	if self.is_open:
	if self._port_handle:
	try:
	self._port_handle.Close()
	except System.IO.Ports.InvalidOperationException:
	# ignore errors. can happen for unplugged USB serial devices
	pass
	self._port_handle = None
	self.is_open = False

	# - - - - - - - - - - - - - - - - - - - - - - - -

	@property
	def in_waiting(self):
	"""Return the number of characters currently in the input buffer."""
	if not self.is_open:
	raise PortNotOpenError()
	return self._port_handle.BytesToRead

	def read(self, size=1):
	"""\
	Read size bytes from the serial port. If a timeout is set it may
	return less characters as requested. With no timeout it will block
	until the requested number of bytes is read.
	"""
	if not self.is_open:
	raise PortNotOpenError()
	# must use single byte reads as this is the only way to read
	# without applying encodings
	data = bytearray()
	while size:
	try:
	data.append(self._port_handle.ReadByte())
	except System.TimeoutException:
	break
	else:
	size -= 1
	return bytes(data)

	def write(self, data):
	"""Output the given string over the serial port."""
	if not self.is_open:
	raise PortNotOpenError()
	#~ if not isinstance(data, (bytes, bytearray)):
	#~ raise TypeError('expected %s or bytearray, got %s' % (bytes, type(data)))
	try:
	# must call overloaded method with byte array argument
	# as this is the only one not applying encodings
	self._port_handle.Write(as_byte_array(data), 0, len(data))
	except System.TimeoutException:
	raise SerialTimeoutException('Write timeout')
	return len(data)

	def reset_input_buffer(self):
	"""Clear input buffer, discarding all that is in the buffer."""
	if not self.is_open:
	raise PortNotOpenError()
	self._port_handle.DiscardInBuffer()

	def reset_output_buffer(self):
	"""\
	Clear output buffer, aborting the current output and
	discarding all that is in the buffer.
	"""
	if not self.is_open:
	raise PortNotOpenError()
	self._port_handle.DiscardOutBuffer()

	def _update_break_state(self):
	"""
	Set break: Controls TXD. When active, to transmitting is possible.
	"""
	if not self.is_open:
	raise PortNotOpenError()
	self._port_handle.BreakState = bool(self._break_state)

	def _update_rts_state(self):
	"""Set terminal status line: Request To Send"""
	if not self.is_open:
	raise PortNotOpenError()
	self._port_handle.RtsEnable = bool(self._rts_state)

	def _update_dtr_state(self):
	"""Set terminal status line: Data Terminal Ready"""
	if not self.is_open:
	raise PortNotOpenError()
	self._port_handle.DtrEnable = bool(self._dtr_state)

	@property
	def cts(self):
	"""Read terminal status line: Clear To Send"""
	if not self.is_open:
	raise PortNotOpenError()
	return self._port_handle.CtsHolding

	@property
	def dsr(self):
	"""Read terminal status line: Data Set Ready"""
	if not self.is_open:
	raise PortNotOpenError()
	return self._port_handle.DsrHolding

	@property
	def ri(self):
	"""Read terminal status line: Ring Indicator"""
	if not self.is_open:
	raise PortNotOpenError()
	#~ return self._port_handle.XXX
	return False # XXX an error would be better

	@property
	def cd(self):
	"""Read terminal status line: Carrier Detect"""
	if not self.is_open:
	raise PortNotOpenError()
	return self._port_handle.CDHolding

	# - - platform specific - - - -
	# none