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import serial
import os
import pty
import tty
import termios
import atexit
import threading
# Open virtual serial port
# Close it when the program exits
def _cleanUp() -> None:
pass
atexit.register(_cleanUp)
class MockJDS6600Device():
def __init__(self):
self._master, self._slave = pty.openpty()
self._masterFile = os.fdopen(self._master, mode="r+b", closefd=False, buffering=0)
self._portName = os.ttyname(self._slave)
self._channels = [False, False]
self._mainThread = threading.Thread(target=self._mainLoop)
self._mainThread.start()
def _mainLoop(self) -> None:
while True:
try:
print("Device reading request....")
request = self._masterFile.readline().decode().strip()
response = self._handleRequest(request)
print("Device sending response")
self._masterFile.write(response.encode())
except OSError as e:
print("Exception caught, breaking out of loop")
break
print("Main loop returning")
def _handleRequest(self, request: str) -> str:
print(f"Device received request: {request}")
return ":ok\r\n"
def stop(self) -> None:
print("STOP")
self._masterFile.close()
os.close(self._master)
print("master closed")
os.close(self._slave)
print("slave closed")
self._mainThread.join()
print("stop returning")
def checkPortConfiguration(self) -> None:
iflag, oflag, cflag, lflag, ispeed, ospeed, cc = termios.tcgetattr(self._slave)
# JDS6600 configuration taken from manual
assert ispeed == termios.B115200
assert ospeed == termios.B115200
assert (cflag & termios.CSIZE) == termios.CS8
assert (cflag & termios.CSTOPB) == 0
assert (cflag & (termios.PARENB | termios.PARODD)) == 0
def getPortName(self) -> str:
return self._portName
def isOn(self, ch: int) -> bool:
return self._channels[ch - 1]
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