kopia lustrzana https://github.com/NanoVNA-Saver/nanovna-saver
133 wiersze
4.3 KiB
Python
133 wiersze
4.3 KiB
Python
# NanoVNASaver
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# A python program to view and export Touchstone data from a NanoVNA
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# Copyright (C) 2019. Rune B. Broberg
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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import logging
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import platform
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from typing import List, Tuple
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from collections import namedtuple
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import serial
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from serial.tools import list_ports
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from NanoVNASaver.Hardware.VNA import VNA
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from NanoVNASaver.Hardware.AVNA import AVNA
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from NanoVNASaver.Hardware.NanoVNA_F import NanoVNA_F
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from NanoVNASaver.Hardware.NanoVNA_H import NanoVNA_H, NanoVNA_H4
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from NanoVNASaver.Hardware.NanoVNA import NanoVNA
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from NanoVNASaver.Hardware.NanoVNA_V2 import NanoVNAV2
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logger = logging.getLogger(__name__)
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Device = namedtuple("Device", "vid pid name")
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DEVICETYPES = (
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Device(0x0483, 0x5740, "NanoVNA"),
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Device(0x16c0, 0x0483, "AVNA"),
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Device(0x04b4, 0x0008, "NanaVNA-V2"),
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)
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# The USB Driver for NanoVNA V2 seems to deliver an
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# incompatible hardware info like:
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# 'PORTS\\VID_04B4&PID_0008\\DEMO'
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# This function will fix it.
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def _fix_v2_hwinfo(dev):
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if dev.hwid == r'PORTS\VID_04B4&PID_0008\DEMO':
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dev.vid, dev.pid = 0x04b4, 0x0008
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return dev
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# Get list of interfaces with VNAs connected
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def get_interfaces() -> List[Tuple[str, str]]:
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return_ports = []
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for d in list_ports.comports():
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if platform.system() == 'Windows' and d.vid is None:
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d = _fix_v2_hwinfo(d)
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for t in DEVICETYPES:
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if d.vid == t.vid and d.pid == t.pid:
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port = d.device
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logger.info("Found %s (%04x %04x) on port %s",
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t.name, d.vid, d.pid, d.device)
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return_ports.append((port, f"{port}({t.name})"))
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return return_ports
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def get_VNA(app, serial_port: serial.Serial) -> 'VNA':
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logger.info("Finding correct VNA type...")
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for _ in range(3):
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vnaType = detect_version(serial_port)
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if vnaType != "unkown":
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break
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serial_port.timeout = 0.2
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if vnaType == 'nanovnav2':
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logger.info("Type: NanoVNA-V2")
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return NanoVNAV2(app, serial_port)
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logger.info("Finding firmware variant...")
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tmp_vna = VNA(app, serial_port)
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tmp_vna.flushSerialBuffers()
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firmware = tmp_vna.readFirmware()
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if firmware.find("AVNA + Teensy") > 0:
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logger.info("Type: AVNA")
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return AVNA(app, serial_port)
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if firmware.find("NanoVNA-H 4") > 0:
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logger.info("Type: NanoVNA-H4")
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return NanoVNA_H4(app, serial_port)
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if firmware.find("NanoVNA-H") > 0:
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logger.info("Type: NanoVNA-H")
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vna = NanoVNA_H(app, serial_port)
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if firmware.find("sweep_points 201") > 0:
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logger.info("VNA has 201 datapoints capability")
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vna.datapoints = 201
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return vna
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if firmware.find("NanoVNA-F") > 0:
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logger.info("Type: NanoVNA-F")
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return NanoVNA_F(app, serial_port)
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elif firmware.find("NanoVNA") > 0:
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logger.info("Type: Generic NanoVNA")
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return NanoVNA(app, serial_port)
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else:
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logger.warning("Did not recognize NanoVNA type from firmware.")
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return NanoVNA(app, serial_port)
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def detect_version(serialPort: serial.Serial) -> str:
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serialPort.timeout = 0.1
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# drain any outstanding data in the serial incoming buffer
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data = "a"
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while len(data) != 0:
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data = serialPort.read(128)
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# send a \r and see what we get
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serialPort.write(b"\r")
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# will wait up to 0.1 seconds
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data = serialPort.readline().decode('ascii')
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if data == 'ch> ':
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# this is an original nanovna
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return 'nanovna'
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if data == '2':
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# this is a nanovna v2
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return 'nanovnav2'
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logger.error('Unknown VNA type: hardware responded to CR with: %s', data)
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return 'unknown'
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