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iocpreactor	[ DIR ]	drwxr-xr-x
test	[ DIR ]	drwxr-xr-x
__init__.py	521 B	-rw-r--r--
_baseprocess.py	1.87 KB	-rw-r--r--
_dumbwin32proc.py	12.8 KB	-rw-r--r--
_glibbase.py	12.51 KB	-rw-r--r--
_idna.py	1.36 KB	-rw-r--r--
_newtls.py	9.11 KB	-rw-r--r--
_pollingfile.py	8.77 KB	-rw-r--r--
_posixserialport.py	1.95 KB	-rw-r--r--
_posixstdio.py	4.58 KB	-rw-r--r--
_producer_helpers.py	3.7 KB	-rw-r--r--
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_signals.py	2.65 KB	-rw-r--r--
_sslverify.py	70.09 KB	-rw-r--r--
_threadedselect.py	11.49 KB	-rw-r--r--
_win32serialport.py	4.63 KB	-rw-r--r--
_win32stdio.py	3.13 KB	-rw-r--r--
abstract.py	18.82 KB	-rw-r--r--
address.py	5.12 KB	-rw-r--r--
asyncioreactor.py	10.31 KB	-rw-r--r--
base.py	43.22 KB	-rw-r--r--
cfreactor.py	17.09 KB	-rw-r--r--
default.py	1.9 KB	-rw-r--r--
defer.py	69.52 KB	-rw-r--r--
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epollreactor.py	8.29 KB	-rw-r--r--
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kqreactor.py	10.05 KB	-rw-r--r--
main.py	1.03 KB	-rw-r--r--
pollreactor.py	5.88 KB	-rw-r--r--
posixbase.py	25.74 KB	-rw-r--r--
process.py	37.98 KB	-rw-r--r--
protocol.py	26.5 KB	-rw-r--r--
pyuisupport.py	817 B	-rw-r--r--
reactor.py	1.82 KB	-rw-r--r--
selectreactor.py	6.07 KB	-rw-r--r--
serialport.py	2.26 KB	-rw-r--r--
ssl.py	8.25 KB	-rw-r--r--
stdio.py	1.02 KB	-rw-r--r--
task.py	30.39 KB	-rw-r--r--
tcp.py	53.62 KB	-rw-r--r--
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udp.py	18.13 KB	-rw-r--r--
unix.py	21.45 KB	-rw-r--r--
utils.py	7.69 KB	-rw-r--r--
win32eventreactor.py	14.84 KB	-rw-r--r--
wxreactor.py	5.14 KB	-rw-r--r--
wxsupport.py	1.33 KB	-rw-r--r--

Code Editor : _win32serialport.py

# -*- test-case-name: twisted.internet.test.test_win32serialport -*-

# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Serial port support for Windows.

Requires PySerial and pywin32.
"""

from __future__ import division, absolute_import

# system imports
from serial import PARITY_NONE
from serial import STOPBITS_ONE
from serial import EIGHTBITS
from serial.serialutil import to_bytes
import win32file, win32event

# twisted imports
from twisted.internet import abstract

# sibling imports
from twisted.internet.serialport import BaseSerialPort

class SerialPort(BaseSerialPort, abstract.FileDescriptor):
    """A serial device, acting as a transport, that uses a win32 event."""

connected = 1

def __init__(self, protocol, deviceNameOrPortNumber, reactor, 
        baudrate = 9600, bytesize = EIGHTBITS, parity = PARITY_NONE,
        stopbits = STOPBITS_ONE, xonxoff = 0, rtscts = 0):
        self._serial = self._serialFactory(
            deviceNameOrPortNumber, baudrate=baudrate, bytesize=bytesize,
            parity=parity, stopbits=stopbits, timeout=None,
            xonxoff=xonxoff, rtscts=rtscts)
        self.flushInput()
        self.flushOutput()
        self.reactor = reactor
        self.protocol = protocol
        self.outQueue = []
        self.closed = 0
        self.closedNotifies = 0
        self.writeInProgress = 0

self.protocol = protocol
        self._overlappedRead = win32file.OVERLAPPED()
        self._overlappedRead.hEvent = win32event.CreateEvent(None, 1, 0, None)
        self._overlappedWrite = win32file.OVERLAPPED()
        self._overlappedWrite.hEvent = win32event.CreateEvent(None, 0, 0, None)

self.reactor.addEvent(self._overlappedRead.hEvent, self, 'serialReadEvent')
        self.reactor.addEvent(self._overlappedWrite.hEvent, self, 'serialWriteEvent')

self.protocol.makeConnection(self)
        self._finishPortSetup()

def _finishPortSetup(self):
        """
        Finish setting up the serial port.

This is a separate method to facilitate testing.
        """
        flags, comstat = self._clearCommError()
        rc, self.read_buf = win32file.ReadFile(self._serial._port_handle,
                                               win32file.AllocateReadBuffer(1),
                                               self._overlappedRead)

def _clearCommError(self):
        return win32file.ClearCommError(self._serial._port_handle)

def serialReadEvent(self):
        #get that character we set up
        n = win32file.GetOverlappedResult(self._serial._port_handle, self._overlappedRead, 0)
        first = to_bytes(self.read_buf[:n])
        #now we should get everything that is already in the buffer
        flags, comstat = self._clearCommError()
        if comstat.cbInQue:
            win32event.ResetEvent(self._overlappedRead.hEvent)
            rc, buf = win32file.ReadFile(self._serial._port_handle,
                                         win32file.AllocateReadBuffer(comstat.cbInQue),
                                         self._overlappedRead)
            n = win32file.GetOverlappedResult(self._serial._port_handle, self._overlappedRead, 1)
            #handle all the received data:
            self.protocol.dataReceived(first + to_bytes(buf[:n]))
        else:
            #handle all the received data:
            self.protocol.dataReceived(first)

#set up next one
        win32event.ResetEvent(self._overlappedRead.hEvent)
        rc, self.read_buf = win32file.ReadFile(self._serial._port_handle,
                                               win32file.AllocateReadBuffer(1),
                                               self._overlappedRead)

def write(self, data):
        if data:
            if self.writeInProgress:
                self.outQueue.append(data)
            else:
                self.writeInProgress = 1
                win32file.WriteFile(self._serial._port_handle, data, self._overlappedWrite)

def serialWriteEvent(self):
        try:
            dataToWrite = self.outQueue.pop(0)
        except IndexError:
            self.writeInProgress = 0
            return
        else:
            win32file.WriteFile(self._serial._port_handle, dataToWrite, self._overlappedWrite)

def connectionLost(self, reason):
        """
        Called when the serial port disconnects.

Will call C{connectionLost} on the protocol that is handling the
        serial data.
        """
        self.reactor.removeEvent(self._overlappedRead.hEvent)
        self.reactor.removeEvent(self._overlappedWrite.hEvent)
        abstract.FileDescriptor.connectionLost(self, reason)
        self._serial.close()
        self.protocol.connectionLost(reason)

${this.title}

Code Editor : _win32serialport.py