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import os
import pty
import termios
import threading
import re
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:
request = self._masterFile.readline().decode().strip()
response = self._handleRequest(request)
if response is not None:
self._masterFile.write(response.encode())
except OSError as e:
break
def _handleRequest(self, request: str) -> str:
pattern = r":(?P<opcode>[wrab])(?P<function>\d+)=(?P<args>.*)\."
m = re.search(pattern, request)
if not m:
return None
opcode = m.group("opcode")
function = int(m.group("function"))
args = m.group("args").split(",")
if opcode == "w":
if function == 20:
self._channels[0] = args[0] == "1"
self._channels[1] = args[1] == "1"
elif opcode == "r":
if function == 20:
return f":r20={int(self._channels[0])},{int(self._channels[1])}.\r\n"
return ":ok\r\n"
def stop(self) -> None:
self._masterFile.close()
os.close(self._master)
os.close(self._slave)
self._mainThread.join()
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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