kopia lustrzana https://github.com/NanoVNA-Saver/nanovna-saver
Merge branch 'split-file_Hardware.py_NanoVNA.py' into split-file_Hardware.py
Holger Mueller
commit
8412c0b297
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# 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 struct
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from time import sleep
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from typing import List
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import serial
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import numpy as np
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from PyQt5 import QtGui
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from NanoVNASaver.Hardware.VNA import VNA, Version
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logger = logging.getLogger(__name__)
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class NanoVNA(VNA):
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name = "NanoVNA"
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datapoints = 101
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screenwidth = 320
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screenheight = 240
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def __init__(self, app, serial_port):
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super().__init__(app, serial_port)
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self.version = Version(self.readVersion())
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self.features = []
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logger.debug("Testing against 0.2.0")
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if self.version.version_string.find("extended with scan") > 0:
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logger.debug("Incompatible scan command detected.")
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self.features.append("Incompatible scan command")
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self.useScan = False
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elif self.version >= Version("0.2.0"):
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logger.debug("Newer than 0.2.0, using new scan command.")
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self.features.append("New scan command")
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self.useScan = True
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else:
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logger.debug("Older than 0.2.0, using old sweep command.")
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self.features.append("Original sweep method")
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self.useScan = False
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self.features.extend(self.readFeatures())
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def isValid(self):
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return True
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def getCalibration(self) -> str:
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logger.debug("Reading calibration info.")
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if not self.serial.is_open:
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return "Not connected."
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if self.app.serialLock.acquire():
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try:
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data = "a"
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while data != "":
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data = self.serial.readline().decode('ascii')
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self.serial.write("cal\r".encode('ascii'))
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result = ""
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data = ""
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sleep(0.1)
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while "ch>" not in data:
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data = self.serial.readline().decode('ascii')
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result += data
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values = result.splitlines()
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return values[1]
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except serial.SerialException as exc:
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logger.exception("Exception while reading calibration info: %s", exc)
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finally:
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self.app.serialLock.release()
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return "Unknown"
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def getScreenshot(self) -> QtGui.QPixmap:
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logger.debug("Capturing screenshot...")
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if not self.serial.is_open:
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return QtGui.QPixmap()
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if self.app.serialLock.acquire():
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try:
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data = "a"
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while data != "":
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data = self.serial.readline().decode('ascii')
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self.serial.write("capture\r".encode('ascii'))
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timeout = self.serial.timeout
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self.serial.timeout = 4
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self.serial.readline()
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image_data = self.serial.read(
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self.screenwidth * self.screenheight * 2)
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self.serial.timeout = timeout
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rgb_data = struct.unpack(
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f">{self.screenwidth * self.screenheight}H",
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image_data)
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rgb_array = np.array(rgb_data, dtype=np.uint32)
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rgba_array = (0xFF000000 +
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((rgb_array & 0xF800) << 8) +
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((rgb_array & 0x07E0) << 5) +
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((rgb_array & 0x001F) << 3))
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image = QtGui.QImage(
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rgba_array,
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self.screenwidth,
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self.screenheight,
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QtGui.QImage.Format_ARGB32)
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logger.debug("Captured screenshot")
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return QtGui.QPixmap(image)
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except serial.SerialException as exc:
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logger.exception(
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"Exception while capturing screenshot: %s", exc)
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finally:
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self.app.serialLock.release()
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return QtGui.QPixmap()
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def readFrequencies(self) -> List[str]:
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return self.readValues("frequencies")
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def readValues11(self) -> List[str]:
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return self.readValues("data 0")
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def readValues21(self) -> List[str]:
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return self.readValues("data 1")
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def resetSweep(self, start: int, stop: int):
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self.writeSerial("sweep {start} {stop} {self.datapoints}")
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self.writeSerial("resume")
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def readVersion(self):
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logger.debug("Reading version info.")
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if not self.serial.is_open:
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return
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if self.app.serialLock.acquire():
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try:
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data = "a"
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while data != "":
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data = self.serial.readline().decode('ascii')
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self.serial.write("version\r".encode('ascii'))
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result = ""
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data = ""
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sleep(0.1)
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while "ch>" not in data:
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data = self.serial.readline().decode('ascii')
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result += data
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values = result.splitlines()
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logger.debug("Found version info: %s", values[1])
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return values[1]
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except serial.SerialException as exc:
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logger.exception("Exception while reading firmware version: %s", exc)
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finally:
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self.app.serialLock.release()
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return
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def setSweep(self, start, stop):
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if self.useScan:
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self.writeSerial("scan " + str(start) + " " + str(stop) + " " + str(self.datapoints))
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else:
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self.writeSerial("sweep " + str(start) + " " + str(stop) + " " + str(self.datapoints))
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sleep(1)
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