2020-05-18 18:31:27 +00:00
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# NanoVNASaver
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2020-06-25 17:48:03 +00:00
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#
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2020-05-18 18:31:27 +00:00
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# A python program to view and export Touchstone data from a NanoVNA
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2020-06-25 17:52:30 +00:00
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# Copyright (C) 2019, 2020 Rune B. Broberg
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2020-06-25 17:48:03 +00:00
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# Copyright (C) 2020 NanoVNA-Saver Authors
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2020-05-16 15:10:07 +00:00
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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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from time import sleep
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2020-07-07 14:48:43 +00:00
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from typing import List, Iterator
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2020-05-16 15:10:07 +00:00
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2020-07-04 10:08:54 +00:00
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from PyQt5 import QtGui
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2020-05-16 15:10:07 +00:00
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2020-06-25 17:48:03 +00:00
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from NanoVNASaver.Settings import Version
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2020-07-04 10:08:54 +00:00
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from NanoVNASaver.Hardware.Serial import Interface, drain_serial
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2020-06-25 17:48:03 +00:00
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2020-05-16 15:10:07 +00:00
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logger = logging.getLogger(__name__)
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class VNA:
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name = "VNA"
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2020-07-07 10:33:32 +00:00
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valid_datapoints = (101, )
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def __init__(self, iface: Interface):
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self.serial = iface
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2020-07-04 12:26:20 +00:00
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self.version = Version("0.0.0")
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2020-06-10 10:28:51 +00:00
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self.features = set()
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self.validateInput = True
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2020-07-07 10:33:32 +00:00
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self.datapoints = self.valid_datapoints[0]
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if self.connected():
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2020-07-08 13:45:33 +00:00
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self.version = self.readVersion()
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self.read_features()
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def exec_command(self, command: str, wait: float = 0.05) -> Iterator[str]:
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logger.debug("exec_command(%s)", command)
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with self.serial.lock:
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drain_serial(self.serial)
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self.serial.write(f"{command}\r".encode('ascii'))
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sleep(wait)
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retries = 0
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while True:
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line = self.serial.readline()
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line = line.decode("ascii").strip()
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if not line:
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retries += 1
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2020-07-13 12:20:23 +00:00
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if retries > 100:
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raise IOError("too many retries")
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2020-07-12 22:09:00 +00:00
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sleep(wait)
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continue
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if line == command: # suppress echo
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continue
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if line.startswith("ch>"):
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logger.debug("Needed retries: %s", retries)
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break
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yield line
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def read_features(self):
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result = "\n".join(list(self.exec_command("help")))
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logger.debug("result:\n%s", result)
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if "capture" in result:
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self.features.add("Screenshots")
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if len(self.valid_datapoints) > 1:
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self.features.add("Customizable data points")
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2020-06-14 07:19:28 +00:00
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def readFrequencies(self) -> List[int]:
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return [int(f) for f in self.readValues("frequencies")]
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def resetSweep(self, start: int, stop: int):
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pass
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2020-07-05 11:00:03 +00:00
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def connected(self) -> bool:
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return self.serial.is_open
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def getFeatures(self) -> List[str]:
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return self.features
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def getCalibration(self) -> str:
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return list(self.exec_command("cal"))[0]
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def getScreenshot(self) -> QtGui.QPixmap:
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return QtGui.QPixmap()
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def flushSerialBuffers(self):
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if not self.connected():
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return
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with self.serial.lock:
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2020-07-01 17:46:35 +00:00
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self.serial.write("\r\n\r\n".encode("ascii"))
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sleep(0.1)
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self.serial.reset_input_buffer()
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self.serial.reset_output_buffer()
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sleep(0.1)
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def readFirmware(self) -> str:
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result = "\n".join(list(self.exec_command("info")))
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logger.debug("result:\n%s", result)
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return result
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def readValues(self, value) -> List[str]:
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logger.debug("VNA reading %s", value)
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result = list(self.exec_command(value))
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logger.debug("VNA done reading %s (%d values)",
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value, len(result))
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return result
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2020-07-08 13:45:33 +00:00
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def readVersion(self) -> 'Version':
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result = list(self.exec_command("version"))
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logger.debug("result:\n%s", result)
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return Version(result[0])
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def setSweep(self, start, stop):
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list(self.exec_command(f"sweep {start} {stop} {self.datapoints}"))
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