Source code for NanoVNASaver.Hardware.Serial

#  NanoVNASaver
#
#  A python program to view and export Touchstone data from a NanoVNA
#  Copyright (C) 2019, 2020  Rune B. Broberg
#  Copyright (C) 2020,2021 NanoVNA-Saver Authors
#
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program.  If not, see <https://www.gnu.org/licenses/>.
import logging
from threading import RLock

import serial

logger = logging.getLogger(__name__)


[docs] def drain_serial(serial_port: serial.Serial): """drain up to 64k outstanding data in the serial incoming buffer""" # logger.debug("Draining: %s", serial_port) timeout = serial_port.timeout serial_port.timeout = 0.05 for _ in range(512): cnt = len(serial_port.read(128)) if not cnt: serial_port.timeout = timeout return serial_port.timeout = timeout logger.warning("unable to drain all data")
[docs] class Interface(serial.Serial): def __init__(self, interface_type: str, comment, *args, **kwargs): super().__init__(*args, **kwargs) assert interface_type in {"serial", "usb", "bt", "network"} self.type = interface_type self.comment = comment self.port = None self.baudrate = 115200 self.timeout = 0.05 self.lock = RLock() def __str__(self) -> str: return f"{self.port} ({self.comment})"