microrepl.py 文件源码

def connect_miniterm(port):
    try:
        ser = serial.Serial(port, BAUDRATE, parity=PARITY, rtscts=False,
                            xonxoff=False)
        return Miniterm(ser, echo=False)
    except serial.SerialException as e:
        if e.errno == errno.ENOENT:
            sys.stderr.write(
                "Device %r not found. Check your "
                "MicroPython device path settings.\n" % port)
        elif e.errno == errno.EBUSY:
            # Device is busy. Explain what to do.
            sys.stderr.write(
                "Found the device, but it is busy. "
                "Wait up to 20 seconds, or "
                "press the reset button on the "
                "back of the device next to the yellow light; "
                "then try again.\n"
            )
        elif e.errno == errno.EACCES:
            sys.stderr.write("Found the device, but could not connect.".format(port))
            sys.stderr.write(e)
            sys.stderr.write('On linux, try adding yourself to the "dialout" group')
            sys.stderr.write('sudo usermod -a -G dialout <your-username>')
        else:
            # Try to be as helpful as possible.
            sys.stderr.write("Found the device, but could not connect via" +
                             " port %r: %s\n" % (port, e))
            sys.stderr.write("I'm not sure what to suggest. :-(\n")
        input("Press ENTER to continue")
        sys.exit(1)