本文整理汇总了Python中FCNTL类的典型用法代码示例。如果您正苦于以下问题：Python FCNTL类的具体用法？Python FCNTL怎么用？Python FCNTL使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了FCNTL类的4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: set_special_baudrate
def set_special_baudrate(port, baudrate):
import array
buf = array.array('i', [0] * 32)
# get serial_struct
FCNTL.ioctl(port.fd, TERMIOS.TIOCGSERIAL, buf)
# set custom divisor
buf[6] = buf[7] / baudrate
# update flags
buf[4] &= ~ASYNC_SPD_MASK
buf[4] |= ASYNC_SPD_CUST
# set serial_struct
try:
res = FCNTL.ioctl(port.fd, TERMIOS.TIOCSSERIAL, buf)
except IOError:
raise ValueError('Failed to set custom baud rate: %r' % baudrate)示例2: set_special_baudrate
def set_special_baudrate(port, baudrate):
# right size is 44 on x86_64, allow for some growth
import array
buf = array.array('i', [0] * 64)
try:
# get serial_struct
FCNTL.ioctl(port.fd, TCGETS2, buf)
# set custom speed
buf[2] &= ~TERMIOS.CBAUD
buf[2] |= BOTHER
buf[9] = buf[10] = baudrate
# set serial_struct
res = FCNTL.ioctl(port.fd, TCSETS2, buf)
except IOError, e:
raise ValueError('Failed to set custom baud rate (%s): %s' % (baudrate, e))示例3: ValueError
raise ValueError('Invalid vmin: %r ' % vmin)
cc[TERMIOS.VMIN] = vmin
#vtime
if vtime < 0 or vtime > 255:
raise ValueError('Invalid vtime: %r' % vtime)
cc[TERMIOS.VTIME] = vtime
#activate settings
termios.tcsetattr(self.fd, TERMIOS.TCSANOW, [iflag, oflag, cflag, lflag, ispeed, ospeed, cc])
# apply custom baud rate, if any
if custom_baud is not None:
import array
buf = array.array('i', [0] * 32)
# get serial_struct
FCNTL.ioctl(self.fd, TERMIOS.TIOCGSERIAL, buf)
# set custom divisor
buf[6] = buf[7] / custom_baud
# update flags
buf[4] &= ~ASYNC_SPD_MASK
buf[4] |= ASYNC_SPD_CUST
# set serial_struct
try:
res = FCNTL.ioctl(self.fd, TERMIOS.TIOCSSERIAL, buf)
except IOError:
raise ValueError('Failed to set custom baud rate: %r' % self._baudrate)
def close(self):示例4: _reconfigurePort
#.........这里部分代码省略.........
#~ raise ValueError('Invalid baud rate: %r' % self._baudrate)
# may need custom baud rate, it isnt in our list.
ispeed = ospeed = getattr(TERMIOS, 'B38400')
custom_baud = int(self._baudrate) # store for later
# setup char len
cflag &= ~TERMIOS.CSIZE
if self._bytesize == 8:
cflag |= TERMIOS.CS8
elif self._bytesize == 7:
cflag |= TERMIOS.CS7
elif self._bytesize == 6:
cflag |= TERMIOS.CS6
elif self._bytesize == 5:
cflag |= TERMIOS.CS5
else:
raise ValueError('Invalid char len: %r' % self._bytesize)
# setup stopbits
if self._stopbits == STOPBITS_ONE:
cflag &= ~(TERMIOS.CSTOPB)
elif self._stopbits == STOPBITS_TWO:
cflag |= (TERMIOS.CSTOPB)
else:
raise ValueError(
'Invalid stopit specification: %r' %
self._stopbits)
# setup parity
iflag &= ~(TERMIOS.INPCK | TERMIOS.ISTRIP)
if self._parity == PARITY_NONE:
cflag &= ~(TERMIOS.PARENB | TERMIOS.PARODD)
elif self._parity == PARITY_EVEN:
cflag &= ~(TERMIOS.PARODD)
cflag |= (TERMIOS.PARENB)
elif self._parity == PARITY_ODD:
cflag |= (TERMIOS.PARENB | TERMIOS.PARODD)
else:
raise ValueError('Invalid parity: %r' % self._parity)
# setup flow control
# xonxoff
if hasattr(TERMIOS, 'IXANY'):
if self._xonxoff:
iflag |= (TERMIOS.IXON | TERMIOS.IXOFF) # |TERMIOS.IXANY)
else:
iflag &= ~(TERMIOS.IXON | TERMIOS.IXOFF | TERMIOS.IXANY)
else:
if self._xonxoff:
iflag |= (TERMIOS.IXON | TERMIOS.IXOFF)
else:
iflag &= ~(TERMIOS.IXON | TERMIOS.IXOFF)
# rtscts
if hasattr(TERMIOS, 'CRTSCTS'):
if self._rtscts:
cflag |= (TERMIOS.CRTSCTS)
else:
cflag &= ~(TERMIOS.CRTSCTS)
# try it with alternate constant name
elif hasattr(TERMIOS, 'CNEW_RTSCTS'):
if self._rtscts:
cflag |= (TERMIOS.CNEW_RTSCTS)
else:
cflag &= ~(TERMIOS.CNEW_RTSCTS)
# XXX should there be a warning if setting up rtscts (and xonxoff etc)
# fails??
# buffer
# vmin "minimal number of characters to be read. = for non blocking"
if vmin < 0 or vmin > 255:
raise ValueError('Invalid vmin: %r ' % vmin)
cc[TERMIOS.VMIN] = vmin
# vtime
if vtime < 0 or vtime > 255:
raise ValueError('Invalid vtime: %r' % vtime)
cc[TERMIOS.VTIME] = vtime
# activate settings
termios.tcsetattr(
self.fd, TERMIOS.TCSANOW, [
iflag, oflag, cflag, lflag, ispeed, ospeed, cc])
# apply custom baud rate, if any
if custom_baud is not None:
import array
buf = array.array('i', [0] * 32)
# get serial_struct
FCNTL.ioctl(self.fd, TERMIOS.TIOCGSERIAL, buf)
# set custom divisor
buf[6] = buf[7] / custom_baud
# update flags
buf[4] &= ~ASYNC_SPD_MASK
buf[4] |= ASYNC_SPD_CUST
# set serial_struct
try:
res = FCNTL.ioctl(self.fd, TERMIOS.TIOCSSERIAL, buf)
except IOError:
raise ValueError(
'Failed to set custom baud rate: %r' %
self._baudrate)