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- # NanoVNASaver
- #
- # A python program to view and export Touchstone data from a NanoVNA
- # Copyright (C) 2019, 2020 Rune B. Broberg
- # Copyright (C) 2020 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 Lock
- import serial
- logger = logging.getLogger(__name__)
- 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")
- 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 = Lock()
- def __str__(self):
- return f"{self.port} ({self.comment})"
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