kopia lustrzana https://github.com/NanoVNA-Saver/nanovna-saver
94 wiersze
3.8 KiB
Python
94 wiersze
3.8 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 struct
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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.NanoVNA import NanoVNA
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logger = logging.getLogger(__name__)
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class NanoVNA_F(NanoVNA):
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name = "NanoVNA-F"
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screenwidth = 800
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screenheight = 480
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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", 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) + # G?!
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((rgb_array & 0x07E0) >> 3) + # B
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((rgb_array & 0x001F) << 11)) # G
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unwrapped_array = np.empty(
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self.screenwidth*self.screenheight,
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dtype=np.uint32)
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for y in range(self.screenheight // 2):
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for x in range(self.screenwidth // 2):
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unwrapped_array[
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2 * x + 2 * y * self.screenwidth
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] = rgba_array[x + y * self.screenwidth]
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unwrapped_array[
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(2 * x) + 1 + 2 * y * self.screenwidth
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] = rgba_array[
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x + (self.screenheight//2 + y) * self.screenwidth
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]
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unwrapped_array[
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2 * x + (2 * y + 1) * self.screenwidth
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] = rgba_array[
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x + self.screenwidth // 2 + y * self.screenwidth
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]
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unwrapped_array[
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(2 * x) + 1 + (2 * y + 1) * self.screenwidth
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] = rgba_array[
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x + self.screenwidth // 2 +
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(self.screenheight//2 + y) * self.screenwidth
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]
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image = QtGui.QImage(
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unwrapped_array,
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self.screenwidth, 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("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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