kopia lustrzana https://github.com/NanoVNA-Saver/nanovna-saver
119 wiersze
4.1 KiB
Python
119 wiersze
4.1 KiB
Python
# NanoVNASaver
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#
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# A python program to view and export Touchstone data from a NanoVNA
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# Copyright (C) 2019, 2020 Rune B. Broberg
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# Copyright (C) 2020,2021 NanoVNA-Saver Authors
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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 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.Serial import drain_serial, Interface
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from NanoVNASaver.Hardware.VNA import VNA
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logger = logging.getLogger(__name__)
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class TinySA(VNA):
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name = "tinySA"
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screenwidth = 320
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screenheight = 240
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valid_datapoints = (290, )
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def __init__(self, iface: Interface):
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super().__init__(iface)
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self.features = {'Screenshots'}
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logger.debug("Setting initial start,stop")
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self.start, self.stop = self._get_running_frequencies()
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self.sweep_max_freq_Hz = 950e6
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self._sweepdata = []
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def _get_running_frequencies(self):
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logger.debug("Reading values: frequencies")
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try:
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frequencies = super().readValues("frequencies")
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return frequencies[0], frequencies[-1]
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except Exception as e:
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logger.warning("%s reading frequencies", e)
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logger.info("falling back to generic")
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return VNA._get_running_frequencies(self)
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def _capture_data(self) -> bytes:
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timeout = self.serial.timeout
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with self.serial.lock:
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drain_serial(self.serial)
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timeout = self.serial.timeout
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self.serial.write("capture\r".encode('ascii'))
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self.serial.readline()
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self.serial.timeout = 4
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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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self.serial.timeout = timeout
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return image_data
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def _convert_data(self, image_data: bytes) -> bytes:
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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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return (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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def getScreenshot(self) -> QtGui.QPixmap:
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logger.debug("Capturing screenshot...")
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if not self.connected():
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return QtGui.QPixmap()
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try:
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rgba_array = self._convert_data(self._capture_data())
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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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return QtGui.QPixmap()
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def resetSweep(self, start: int, stop: int):
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return
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def setSweep(self, start, stop):
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self.start = start
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self.stop = stop
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list(self.exec_command(f"sweep {start} {stop} {self.datapoints}"))
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list(self.exec_command("trigger auto"))
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def readFrequencies(self) -> List[int]:
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logger.debug("readFrequencies")
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return [int(line) for line in self.exec_command("frequencies")]
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def readValues(self, value) -> List[str]:
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logger.debug("Read: %s", value)
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if value == "data 0":
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self._sweepdata = [f"0 {line.strip()}" for line in self.exec_command("data")]
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return self._sweepdata
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