serial_interface.py 文件源码

def __init__(self, name):
        """If possible, connect to serial port"""

        # Try to establish connection to serial port
        try:
            self.serial_connection = serial.Serial(name, 9600)
            self.serial_connection_established = True

        # If it fails because there is no device, use virtual serial port
        except serial.SerialException:

            # Create virtual serial port
            self.master, self.slave = pty.openpty()
            self.vPort = os.ttyname(self.slave)

            # Create instance
            self.serial_connection = serial.Serial(self.vPort, 9600)
            self.serial_connection_established = True

            logging.warn("Trigger device not found -> Using virtual device")

        # Create events
        self.trigger_event = threading.Event()
        self.eventProgramEnd = threading.Event()

        # Store current time
        self.last_trigger_time = time.time()
        self.firstRun = True

        # Call initialization of thread class
        threading.Thread.__init__(self)