73 lines
1.9 KiB
Python
73 lines
1.9 KiB
Python
# Copyright (c) Twisted Matrix Laboratories.
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# See LICENSE for details.
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"""
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Serial Port Protocol
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"""
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from __future__ import division, absolute_import
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# dependent on pyserial ( http://pyserial.sf.net/ )
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# only tested w/ 1.18 (5 Dec 2002)
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from serial import PARITY_NONE
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from serial import STOPBITS_ONE
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from serial import EIGHTBITS
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from twisted.internet.serialport import BaseSerialPort
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from twisted.internet import abstract, fdesc
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class SerialPort(BaseSerialPort, abstract.FileDescriptor):
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"""
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A select()able serial device, acting as a transport.
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"""
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connected = 1
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def __init__(self, protocol, deviceNameOrPortNumber, reactor,
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baudrate = 9600, bytesize = EIGHTBITS, parity = PARITY_NONE,
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stopbits = STOPBITS_ONE, timeout = 0, xonxoff = 0, rtscts = 0):
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abstract.FileDescriptor.__init__(self, reactor)
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self._serial = self._serialFactory(
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deviceNameOrPortNumber, baudrate=baudrate, bytesize=bytesize,
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parity=parity, stopbits=stopbits, timeout=timeout,
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xonxoff=xonxoff, rtscts=rtscts)
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self.reactor = reactor
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self.flushInput()
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self.flushOutput()
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self.protocol = protocol
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self.protocol.makeConnection(self)
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self.startReading()
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def fileno(self):
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return self._serial.fd
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def writeSomeData(self, data):
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"""
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Write some data to the serial device.
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"""
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return fdesc.writeToFD(self.fileno(), data)
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def doRead(self):
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"""
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Some data's readable from serial device.
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"""
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return fdesc.readFromFD(self.fileno(), self.protocol.dataReceived)
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def connectionLost(self, reason):
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"""
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Called when the serial port disconnects.
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Will call C{connectionLost} on the protocol that is handling the
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serial data.
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"""
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abstract.FileDescriptor.connectionLost(self, reason)
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self._serial.close()
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self.protocol.connectionLost(reason)
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