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import socket
import threading
import atexit
import re
IP = "0.0.0.0"
PORT = 5025
# Bind server socket when this module is included
_serverSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
_serverSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
_serverSocket.bind((IP, PORT))
_serverSocket.listen(1)
# Close it when the program exits
def _cleanUp():
_serverSocket.close()
atexit.register(_cleanUp)
class MockSDS1000XEDevice:
def __init__(self):
self._stopFlag = False
self._clientSocket = None
self._mainThread = threading.Thread(target=self._mainLoop)
self._mainThread.start()
# Mock measured values
self._channels = [{"AMPL" : None} for i in range(0, 4)]
def _mainLoop(self) -> None:
self._clientSocket, _ = _serverSocket.accept()
self._clientSocket.settimeout(0.1)
try:
while not self._stopFlag:
try:
request = self._clientSocket.recv(4096).decode()
response = self._handleRequest(request)
if response is not None:
self._clientSocket.send(response.encode())
except TimeoutError as e:
pass
finally:
self._clientSocket.close()
def _handleRequest(self, request: str) -> str:
m = re.search(r"C(?P<channel>\d):(?P<opcode>\w+)\?\s(?P<arg>\w+)", request)
if not m:
return None
channelIndex = int(m.group("channel")) - 1
opcode = m.group("opcode")
if opcode == "PAVA":
arg = m.group("arg")
value = self._channels[channelIndex].get(arg)
unit = "Hz" if arg == "FREQ" else "V"
if value is None:
return None
else:
response = f"C{m.group('channel')}:PAVA {arg},{value:.6E}{unit}"
return response
def stop(self) -> None:
self._stopFlag = True
self._mainThread.join()
def setAmplitude(self, channel: int, value: float) -> None:
self._channels[channel - 1]["AMPL"] = value
def setPeakToPeak(self, channel: int, value: float) -> None:
self._channels[channel - 1]["PKPK"] = value
def setRMS(self, channel: int, value: float) -> None:
self._channels[channel - 1]["RMS"] = value
def setFrequency(self, channel: int, value: float) -> None:
self._channels[channel - 1]["FREQ"] = value
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