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#!/usr/bin/env python
#
# Serial port enumeration. Console tool and backend selection.
#
# This file is part of pySerial. https://github.com/pyserial/pyserial
# (C) 2011-2015 Chris Liechti <cliechti@gmx.net>
#
# SPDX-License-Identifier: BSD-3-Clause
"""\
This module will provide a function called comports that returns an
iterable (generator or list) that will enumerate available com ports. Note that
on some systems non-existent ports may be listed.
Additionally a grep function is supplied that can be used to search for ports
based on their descriptions or hardware ID.
"""
import sys
import os
import re
# chose an implementation, depending on os
#~ if sys.platform == 'cli':
#~ else:
if os.name == 'nt': # sys.platform == 'win32':
from serial.tools.list_ports_windows import comports
elif os.name == 'posix':
from serial.tools.list_ports_posix import comports
#~ elif os.name == 'java':
else:
raise ImportError("Sorry: no implementation for your platform ('%s') available" % (os.name,))
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
def grep(regexp):
"""\
Search for ports using a regular expression. Port name, description and
hardware ID are searched. The function returns an iterable that returns the
same tuples as comport() would do.
"""
r = re.compile(regexp, re.I)
for info in comports():
port, desc, hwid = info
if r.search(port) or r.search(desc) or r.search(hwid):
yield info
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
def main():
import argparse
parser = argparse.ArgumentParser(description='Serial port enumeration')
parser.add_argument(
'regexp',
nargs='?',
help='only show ports that match this regex')
parser.add_argument(
'-v', '--verbose',
action='store_true',
help='show more messages')
parser.add_argument(
'-q', '--quiet',
action='store_true',
help='suppress all messages')
parser.add_argument(
'-n',
type=int,
help='only output the N-th entry')
args = parser.parse_args()
hits = 0
# get iteraror w/ or w/o filter
if args.regexp:
if not args.quiet:
sys.stderr.write("Filtered list with regexp: %r\n" % (args.regexp,))
iterator = sorted(grep(args.regexp))
else:
iterator = sorted(comports())
# list them
for n, (port, desc, hwid) in enumerate(iterator, 1):
if args.n is None or args.n == n:
sys.stdout.write("{:20}\n".format(port))
if args.verbose:
sys.stdout.write(" desc: {}\n".format(desc))
sys.stdout.write(" hwid: {}\n".format(hwid))
hits += 1
if not args.quiet:
if hits:
sys.stderr.write("{} ports found\n".format(hits))
else:
sys.stderr.write("no ports found\n")
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# test
if __name__ == '__main__':
main()
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