def prepare(self):
# per-readline preparations:
self.__svtermstate = tcgetattr(self.input_fd)
raw = self.__svtermstate.copy()
raw.iflag |= termios.ICRNL
raw.iflag &= ~(termios.BRKINT | termios.INPCK |
termios.ISTRIP | termios.IXON)
raw.oflag &= ~termios.OPOST
raw.cflag &= ~(termios.CSIZE | termios.PARENB)
raw.cflag |= (termios.CS8)
raw.lflag &= ~(termios.ICANON | termios.ECHO |
termios.IEXTEN | (termios.ISIG * 1))
raw.cc[termios.VMIN] = 1
raw.cc[termios.VTIME] = 0
tcsetattr(self.input_fd, termios.TCSADRAIN, raw)
self.screen = []
self.height, self.width = self.getheightwidth()
self.__buffer = []
self.__posxy = 0, 0
self.__gone_tall = 0
self.__move = self.__move_short
self.__offset = 0
self.__maybe_write_code(self._smkx)
try:
self.old_sigwinch = signal.signal(
signal.SIGWINCH, self.__sigwinch)
except ValueError:
pass
python类PARENB的实例源码
def __init__(self, device="/dev/ttyAMA0", baudrate=9600):
if not device.startswith("/dev/"):
device = "/dev/%s" % device
if isinstance(baudrate, str):
baudrate = int(baudrate)
aname = "B%d" % baudrate
if not hasattr(termios, aname):
raise Exception("Unsupported baudrate")
self.baudrate = baudrate
Bus.__init__(self, "UART", device, os.O_RDWR | os.O_NOCTTY)
fcntl.fcntl(self.fd, fcntl.F_SETFL, os.O_NDELAY)
#backup = termios.tcgetattr(self.fd)
options = termios.tcgetattr(self.fd)
# iflag
options[0] = 0
# oflag
options[1] = 0
# cflag
options[2] |= (termios.CLOCAL | termios.CREAD)
options[2] &= ~termios.PARENB
options[2] &= ~termios.CSTOPB
options[2] &= ~termios.CSIZE
options[2] |= termios.CS8
# lflag
options[3] = 0
speed = getattr(termios, aname)
# input speed
options[4] = speed
# output speed
options[5] = speed
termios.tcsetattr(self.fd, termios.TCSADRAIN, options)
def __init__(self, device="/dev/ttyAMA0", baudrate=9600):
if not device.startswith("/dev/"):
device = "/dev/%s" % device
if isinstance(baudrate, str):
baudrate = int(baudrate)
aname = "B%d" % baudrate
if not hasattr(termios, aname):
raise Exception("Unsupported baudrate")
self.baudrate = baudrate
Bus.__init__(self, "UART", device, os.O_RDWR | os.O_NOCTTY)
fcntl.fcntl(self.fd, fcntl.F_SETFL, os.O_NDELAY)
#backup = termios.tcgetattr(self.fd)
options = termios.tcgetattr(self.fd)
# iflag
options[0] = 0
# oflag
options[1] = 0
# cflag
options[2] |= (termios.CLOCAL | termios.CREAD)
options[2] &= ~termios.PARENB
options[2] &= ~termios.CSTOPB
options[2] &= ~termios.CSIZE
options[2] |= termios.CS8
# lflag
options[3] = 0
speed = getattr(termios, aname)
# input speed
options[4] = speed
# output speed
options[5] = speed
termios.tcsetattr(self.fd, termios.TCSADRAIN, options)
def _fix_tty(self):
"""Set suitable tty options
"""
assert self.tcattr is not None
iflag, oflag, cflag, lflag, ispeed, ospeed, chars = self.tcattr # pylint:disable=unpacking-non-sequence
# equivalent to cfmakeraw
iflag &= ~(termios.IGNBRK | termios.BRKINT | termios.PARMRK | termios.ISTRIP | termios.INLCR |
termios.IGNCR | termios.ICRNL | termios.IXON)
oflag &= ~termios.OPOST
lflag &= ~(termios.ECHO | termios.ECHONL | termios.ICANON | termios.ISIG | termios.IEXTEN)
cflag &= ~(termios.CSIZE | termios.PARENB)
cflag |= termios.CS8
termios.tcsetattr(STDIN, termios.TCSANOW, [iflag, oflag, cflag, lflag, ispeed, ospeed, chars])
