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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Serial Port Protocol
"""
# http://twistedmatrix.com/trac/ticket/3725#comment:24
# Apparently applications use these names even though they should
# be imported from pyserial
__all__ = [
"serial",
"PARITY_ODD",
"PARITY_EVEN",
"PARITY_NONE",
"STOPBITS_TWO",
"STOPBITS_ONE",
"FIVEBITS",
"EIGHTBITS",
"SEVENBITS",
"SIXBITS",
# Name this module is actually trying to export
"SerialPort",
]
# all of them require pyserial at the moment, so check that first
import serial # type: ignore[import]
from serial import (
EIGHTBITS,
FIVEBITS,
PARITY_EVEN,
PARITY_NONE,
PARITY_ODD,
SEVENBITS,
SIXBITS,
STOPBITS_ONE,
STOPBITS_TWO,
)
from twisted.python.runtime import platform
class BaseSerialPort:
"""
Base class for Windows and POSIX serial ports.
@ivar _serialFactory: a pyserial C{serial.Serial} factory, used to create
the instance stored in C{self._serial}. Overrideable to enable easier
testing.
@ivar _serial: a pyserial C{serial.Serial} instance used to manage the
options on the serial port.
"""
_serialFactory = serial.Serial
def setBaudRate(self, baudrate):
if hasattr(self._serial, "setBaudrate"):
self._serial.setBaudrate(baudrate)
else:
self._serial.setBaudRate(baudrate)
def inWaiting(self):
return self._serial.inWaiting()
def flushInput(self):
self._serial.flushInput()
def flushOutput(self):
self._serial.flushOutput()
def sendBreak(self):
self._serial.sendBreak()
def getDSR(self):
return self._serial.getDSR()
def getCD(self):
return self._serial.getCD()
def getRI(self):
return self._serial.getRI()
def getCTS(self):
return self._serial.getCTS()
def setDTR(self, on=1):
self._serial.setDTR(on)
def setRTS(self, on=1):
self._serial.setRTS(on)
# Expert appropriate implementation of SerialPort.
if platform.isWindows():
from twisted.internet._win32serialport import SerialPort
else:
from twisted.internet._posixserialport import SerialPort # type: ignore[assignment]
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