__init__.py 文件源码

def _find_serial_port(self, vid, pid, name):
        """Find a serial port by VID, PID and text name

        :param vid: USB vendor ID to locate
        :param pid: USB product ID to locate
        :param name: USB device name to find where VID/PID match fails

        """

        check_for = "USB VID:PID={vid:04x}:{pid:04x}".format(vid=vid,pid=pid).upper()
        ports = serial.tools.list_ports.comports()

        for check_port in ports:
            if hasattr(serial.tools,'list_ports_common'):
                if (check_port.vid, check_port.pid) == (VID, PID):
                    return check_port.device
                continue

            if check_for in check_port[2].upper() or name == check_port[1]:
                return check_port[0]

        return None