def main():
"""Verify readline() works with PyFTDI extension."""
serialext.touch()
with serial_for_url('ftdi:///1', baudrate=115200) as ser:
ser.write(b'Hello World\r\n')
line = ser.readline()
print(line)
print('testdone')
def _open_port(device, baudrate, parity, rtscts, debug=False):
"""Open the serial communication port"""
try:
from serial.serialutil import SerialException
from serial import PARITY_NONE
except ImportError as exc:
raise ImportError("Python serial module not installed") from exc
try:
from serial import serial_for_url, VERSION as serialver
# use a simple regex rather than adding a new dependency on the
# more complete 'packaging' module
vmo = search(r'^(\d+)\.(\d+)', serialver)
if not vmo:
# unable to parse version
raise ValueError()
if tuple([int(x) for x in vmo.groups()]) < (3, 0):
# pysrial version is too old
raise ValueError()
except (ValueError, IndexError, ImportError) as exc:
raise ImportError("pyserial 3.0+ is required") from exc
# the following import enables serial protocol extensions
if device.startswith('ftdi:'):
try:
from pyftdi import serialext
serialext.touch()
except ImportError as exc:
raise ImportError("PyFTDI module not installed") from exc
try:
port = serial_for_url(device,
baudrate=baudrate,
parity=parity or PARITY_NONE,
rtscts=rtscts,
timeout=0)
if not port.is_open:
port.open()
if not port.is_open:
raise IOError('Cannot open port "%s"' % device)
if debug:
backend = port.BACKEND if hasattr(port, 'BACKEND') else '?'
print("Using serial backend '%s'" % backend)
return port
except SerialException as exc:
raise IOError(str(exc)) from exc
def _open_port(device, baudrate, parity, rtscts, debug=False):
"""Open the serial communication port"""
try:
from serial.serialutil import SerialException
from serial import PARITY_NONE
except ImportError:
raise ImportError("Python serial module not installed")
try:
from serial import serial_for_url, VERSION as serialver
version = tuple([int(x) for x in serialver.split('.')])
if version < (2, 6):
raise ValueError
except (ValueError, IndexError, ImportError):
raise ImportError("pyserial 2.6+ is required")
# the following import enables serial protocol extensions
if device.startswith('ftdi:'):
try:
from pyftdi import serialext
serialext.touch()
except ImportError:
raise ImportError("PyFTDI module not installed")
try:
port = serial_for_url(device,
baudrate=baudrate,
parity=parity or PARITY_NONE,
rtscts=rtscts,
timeout=0)
if not port.is_open:
port.open()
if not port.is_open:
raise IOError('Cannot open port "%s"' % device)
if debug:
backend = port.BACKEND if hasattr(port, 'BACKEND') else '?'
print("Using serial backend '%s'" % backend)
return port
except SerialException as exc:
raise IOError(str(exc))
def _open_port(device, baudrate, parity, rtscts, debug=False):
"""Open the serial communication port"""
try:
from serial.serialutil import SerialException
from serial import PARITY_NONE
except ImportError:
raise ImportError("Python serial module not installed")
try:
from serial import serial_for_url, VERSION as serialver
version = tuple([int(x) for x in serialver.split('.')])
if version < (2, 6):
raise ValueError
except (ValueError, IndexError, ImportError):
raise ImportError("pyserial 2.6+ is required")
# the following import enables serial protocol extensions
if device.startswith('ftdi:'):
try:
from pyftdi import serialext
serialext.touch()
except ImportError:
raise ImportError("PyFTDI module not installed")
try:
port = serial_for_url(device,
baudrate=baudrate,
parity=parity or PARITY_NONE,
rtscts=rtscts,
timeout=0)
if not port.is_open:
port.open()
if not port.is_open:
raise IOError('Cannot open port "%s"' % device)
if debug:
backend = hasattr(port, 'BACKEND') and port.BACKEND or '?'
print("Using serial backend '%s'" % backend)
return port
except SerialException as e:
raise IOError(str(e))
def main():
"""Verify readline() works with PyFTDI extension."""
serialext.touch()
with serial_for_url('ftdi:///1', baudrate=115200) as ser:
line = ser.readline()
print(line)
