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# Copyright (c) 2001-2007 Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Serial Port Protocol
"""
# system imports
import os, errno
# dependent on pyserial ( http://pyserial.sf.net/ )
# only tested w/ 1.18 (5 Dec 2002)
import serial
from serial import PARITY_NONE, PARITY_EVEN, PARITY_ODD
from serial import STOPBITS_ONE, STOPBITS_TWO
from serial import FIVEBITS, SIXBITS, SEVENBITS, EIGHTBITS
from serialport import BaseSerialPort
# twisted imports
from twisted.internet import abstract, fdesc, main
class SerialPort(BaseSerialPort, abstract.FileDescriptor):
"""
A select()able serial device, acting as a transport.
"""
connected = 1
def __init__(self, protocol, deviceNameOrPortNumber, reactor,
baudrate = 9600, bytesize = EIGHTBITS, parity = PARITY_NONE,
stopbits = STOPBITS_ONE, timeout = 0, xonxoff = 0, rtscts = 0):
abstract.FileDescriptor.__init__(self, reactor)
self._serial = serial.Serial(deviceNameOrPortNumber, baudrate = baudrate, bytesize = bytesize, parity = parity, stopbits = stopbits, timeout = timeout, xonxoff = xonxoff, rtscts = rtscts)
self.reactor = reactor
self.flushInput()
self.flushOutput()
self.protocol = protocol
self.protocol.makeConnection(self)
self.startReading()
def fileno(self):
return self._serial.fd
def writeSomeData(self, data):
"""
Write some data to the serial device.
"""
return fdesc.writeToFD(self.fileno(), data)
def doRead(self):
"""
Some data's readable from serial device.
"""
return fdesc.readFromFD(self.fileno(), self.protocol.dataReceived)
def connectionLost(self, reason):
abstract.FileDescriptor.connectionLost(self, reason)
self._serial.close()
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