def write(self, data):
"""Output the given string over the serial port."""
if self.sock is None:
import serial
raise serial.portNotOpenError()
t = len(data)
d = data
while t > 0:
try:
if self._writeTimeout is not None and self._writeTimeout > 0:
_, ready, _ = select.select([], [self.sock], [],
self._writeTimeout)
if not ready:
raise serial.writeTimeoutError
n = self.sock.send(d)
if self._dump:
print hexdump(d[:n])
if self._writeTimeout is not None and self._writeTimeout > 0:
_, ready, _ = select.select([], [self.sock], [],
self._writeTimeout)
if not ready:
raise serial.writeTimeoutError
d = d[n:]
t = t - n
except OSError, v:
if v.errno != errno.EAGAIN:
raise
def read(self, size=1):
"""Read size bytes from the serial port. If a timeout is set it may
return less characters as requested. With no timeout it will block
until the requested number of bytes is read."""
if self.sock is None:
import serial
raise serial.portNotOpenError()
read = ''
if size > 0:
while len(read) < size:
ready, _, _ = select.select([self.sock], [], [], self._timeout)
if not ready:
break # timeout
buf = self.sock.recv(size-len(read))
if not len(buf):
# Some character is ready, but none can be read
# it seems that this is a marker for a dead peer
# Exception does not work, for some reason (missing ioctl?)
import serial
raise serial.SerialException('Peer disconnected')
read = read + buf
if self._timeout >= 0 and not buf:
break # early abort on timeout
return read
def read(self, size=1):
"""Read size bytes from the serial port. If a timeout is set it may
return less characters as requested. With no timeout it will block
until the requested number of bytes is read."""
if self.sock is None:
import serial
raise serial.portNotOpenError()
read = ''
if size > 0:
while len(read) < size:
ready, _, _ = select.select([self.sock], [], [], self._timeout)
if not ready:
break # timeout
buf = self.sock.recv(size - len(read))
if not len(buf):
# Some character is ready, but none can be read
# it seems that this is a marker for a dead peer
# Exception does not work, for some reason (missing ioctl?)
import serial
raise serial.SerialException('Peer disconnected')
read = read + buf
if self._timeout >= 0 and not buf:
break # early abort on timeout
return read
def write(self, data):
"""Output the given string over the serial port."""
if self.sock is None:
import serial
raise serial.portNotOpenError()
t = len(data)
d = data
while t > 0:
try:
if self._writeTimeout is not None and self._writeTimeout > 0:
_, ready, _ = select.select([], [self.sock], [],
self._writeTimeout)
if not ready:
raise serial.writeTimeoutError
n = self.sock.send(d)
if self._dump:
print hexdump(d[:n])
if self._writeTimeout is not None and self._writeTimeout > 0:
_, ready, _ = select.select([], [self.sock], [],
self._writeTimeout)
if not ready:
raise serial.writeTimeoutError
d = d[n:]
t = t - n
except OSError, v:
if v.errno != errno.EAGAIN:
raise
