mirror of
https://github.com/google/bumble.git
synced 2026-04-16 00:25:31 +00:00
73 lines
2.4 KiB
Python
73 lines
2.4 KiB
Python
# Copyright 2021-2022 Google LLC
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# https://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# Imports
|
|
# -----------------------------------------------------------------------------
|
|
import asyncio
|
|
import logging
|
|
import serial_asyncio
|
|
|
|
from .common import Transport, StreamPacketSource, StreamPacketSink
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# Logging
|
|
# -----------------------------------------------------------------------------
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
# -----------------------------------------------------------------------------
|
|
async def open_serial_transport(spec):
|
|
'''
|
|
Open a serial port transport.
|
|
The parameter string has this syntax:
|
|
<device-path>[,<speed>][,rtscts][,dsrdtr]
|
|
When <speed> is omitted, the default value of 1000000 is used
|
|
When "rtscts" is specified, RTS/CTS hardware flow control is enabled
|
|
When "dsrdtr" is specified, DSR/DTR hardware flow control is enabled
|
|
|
|
Examples:
|
|
/dev/tty.usbmodem0006839912172
|
|
/dev/tty.usbmodem0006839912172,1000000
|
|
/dev/tty.usbmodem0006839912172,rtscts
|
|
'''
|
|
|
|
speed = 1000000
|
|
rtscts = False
|
|
dsrdtr = False
|
|
if ',' in spec:
|
|
parts = spec.split(',')
|
|
device = parts[0]
|
|
for part in parts[1:]:
|
|
if part == 'rtscts':
|
|
rtscts = True
|
|
elif part == 'dsrdtr':
|
|
dsrdtr = True
|
|
elif part.isnumeric():
|
|
speed = int(part)
|
|
else:
|
|
device = spec
|
|
serial_transport, packet_source = await serial_asyncio.create_serial_connection(
|
|
asyncio.get_running_loop(),
|
|
lambda: StreamPacketSource(),
|
|
device,
|
|
baudrate=speed,
|
|
rtscts=rtscts,
|
|
dsrdtr=dsrdtr
|
|
)
|
|
packet_sink = StreamPacketSink(serial_transport)
|
|
|
|
return Transport(packet_source, packet_sink)
|
|
|