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Python win32.GetCommTimeouts方法代码示例

本文整理汇总了Python中serial.win32.GetCommTimeouts方法的典型用法代码示例。如果您正苦于以下问题:Python win32.GetCommTimeouts方法的具体用法?Python win32.GetCommTimeouts怎么用?Python win32.GetCommTimeouts使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在serial.win32的用法示例。


在下文中一共展示了win32.GetCommTimeouts方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。

示例1: open

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetCommTimeouts [as 别名]
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._isOpen:
            raise SerialException("Port is already open.")
        # the "\\.\COMx" format is required for devices other than COM1-COM8
        # not all versions of windows seem to support this properly
        # so that the first few ports are used with the DOS device name
        port = self.portstr
        try:
            if port.upper().startswith('COM') and int(port[3:]) > 8:
                port = '\\\\.\\' + port
        except ValueError:
            # for like COMnotanumber
            pass
        self.hComPort = win32.CreateFile(port,
               win32.GENERIC_READ | win32.GENERIC_WRITE,
               0, # exclusive access
               None, # no security
               win32.OPEN_EXISTING,
               win32.FILE_ATTRIBUTE_NORMAL | win32.FILE_FLAG_OVERLAPPED,
               0)
        if self.hComPort == win32.INVALID_HANDLE_VALUE:
            self.hComPort = None    # 'cause __del__ is called anyway
            raise SerialException("could not open port %r: %r" % (self.portstr, ctypes.WinError()))

        try:
            self._overlappedRead = win32.OVERLAPPED()
            self._overlappedRead.hEvent = win32.CreateEvent(None, 1, 0, None)
            self._overlappedWrite = win32.OVERLAPPED()
            #~ self._overlappedWrite.hEvent = win32.CreateEvent(None, 1, 0, None)
            self._overlappedWrite.hEvent = win32.CreateEvent(None, 0, 0, None)

            # Setup a 4k buffer
            win32.SetupComm(self.hComPort, 4096, 4096)

            # Save original timeout values:
            self._orgTimeouts = win32.COMMTIMEOUTS()
            win32.GetCommTimeouts(self.hComPort, ctypes.byref(self._orgTimeouts))

            self._reconfigurePort()

            # Clear buffers:
            # Remove anything that was there
            win32.PurgeComm(self.hComPort,
                    win32.PURGE_TXCLEAR | win32.PURGE_TXABORT |
                    win32.PURGE_RXCLEAR | win32.PURGE_RXABORT)
        except:
            try:
                self._close()
            except:
                # ignore any exception when closing the port
                # also to keep original exception that happened when setting up
                pass
            self.hComPort = None
            raise
        else:
            self._isOpen = True 
开发者ID:whaleygeek,项目名称:microbit-gateway,代码行数:62,代码来源:serialwin32.py

示例2: open

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetCommTimeouts [as 别名]
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._isOpen:
            raise SerialException("Port is already open.")
        # the "\\.\COMx" format is required for devices other than COM1-COM8
        # not all versions of windows seem to support this properly
        # so that the first few ports are used with the DOS device name
        port = self.portstr
        try:
            if port.upper().startswith('COM') and int(port[3:]) > 8:
                port = '\\\\.\\' + port
        except ValueError:
            # for like COMnotanumber
            pass
        self.hComPort = win32.CreateFile(port,
               win32.GENERIC_READ | win32.GENERIC_WRITE,
               0, # exclusive access
               None, # no security
               win32.OPEN_EXISTING,
               win32.FILE_ATTRIBUTE_NORMAL | win32.FILE_FLAG_OVERLAPPED,
               0)
        if self.hComPort == win32.INVALID_HANDLE_VALUE:
            self.hComPort = None    # 'cause __del__ is called anyway
            raise SerialException("could not open port %s: %s" % (self.portstr, ctypes.WinError()))

        # Setup a 4k buffer
        win32.SetupComm(self.hComPort, 4096, 4096)

        # Save original timeout values:
        self._orgTimeouts = win32.COMMTIMEOUTS()
        win32.GetCommTimeouts(self.hComPort, ctypes.byref(self._orgTimeouts))

        self._rtsState = win32.RTS_CONTROL_ENABLE
        self._dtrState = win32.DTR_CONTROL_ENABLE

        self._reconfigurePort()

        # Clear buffers:
        # Remove anything that was there
        win32.PurgeComm(self.hComPort,
                            win32.PURGE_TXCLEAR | win32.PURGE_TXABORT |
                            win32.PURGE_RXCLEAR | win32.PURGE_RXABORT)

        self._overlappedRead = win32.OVERLAPPED()
        self._overlappedRead.hEvent = win32.CreateEvent(None, 1, 0, None)
        self._overlappedWrite = win32.OVERLAPPED()
        #~ self._overlappedWrite.hEvent = win32.CreateEvent(None, 1, 0, None)
        self._overlappedWrite.hEvent = win32.CreateEvent(None, 0, 0, None)
        self._isOpen = True 
开发者ID:respeaker,项目名称:get_started_with_respeaker,代码行数:54,代码来源:serialwin32.py


注:本文中的serial.win32.GetCommTimeouts方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。