esptool.py 文件源码

def __init__(self, port=DEFAULT_PORT, baud=ESP_ROM_BAUD):
        """Base constructor for ESPLoader bootloader interaction

        Don't call this constructor, either instantiate ESP8266ROM
        or ESP32ROM, or use ESPLoader.detect_chip().

        This base class has all of the instance methods for bootloader
        functionality supported across various chips & stub
        loaders. Subclasses replace the functions they don't support
        with ones which throw NotImplementedInROMError().

        """
        if isinstance(port, serial.Serial):
            self._port = port
        else:
            self._port = serial.serial_for_url(port)
        self._slip_reader = slip_reader(self._port)
        # setting baud rate in a separate step is a workaround for
        # CH341 driver on some Linux versions (this opens at 9600 then
        # sets), shouldn't matter for other platforms/drivers. See
        # https://github.com/espressif/esptool/issues/44#issuecomment-107094446
        self._set_port_baudrate(baud)