EFI Shell commands -- SERMODE (設定串列阜的屬性)

Sets serial port attributes.

SERMODE [handle [baudrate parity databits stop bits]]

    handle   - Device handle for a serial port

    baudrate - Baud rate for specified serial port

    parity   - Parity bit settings for specified serial port:

                 d   - Default parity

                 n   - No parity

                 e   - Even parity

                 o   - Odd parity

                 m   - Mark parity

                 s   - Space parity

    databits - Data bits for specified serial port

    stopbits - Stop bits for specified serial port

Note:
    1. The 'handle' parameter is the device handle of the desired serial port.
       The 'DH' command can be used to retrieve this information.
    2. The 'stopbits' parameter supports the following settings:
         0  (0 stop bits - default setting)
         1  (1 stop bit)
         2  (2 stop bits)
         15 (1.5 stop bits)
       All other settings are invalid.
    3. The 'baudrate' parameter supports the following settings:
        50, 75, 110, 150, 300, 600, 1200, 1800, 2000, 2400, 3600, 4800,
        7200, 9600(default), 19200, 38400, 57600, 115200, 230400, 460800
       All other values will be converted to the next highest setting.
    4. The 'databits' parameter supports the following settings:
         4
         7
         8 (default)
       All other settings are invalid.
    5. Parity attributes are mutually exclusive.

Examples:
  * To display the settings for all serial port devices:
    Shell> sermode
    4F06B08 - (115200, N, 8, 1)
    4F05F88 - (115200, N, 8, 1)

  * To display the settings for the serial port device whose handle is 0x6B:
    Shell> sermode 6B
    4F06B08 - (115200, N, 8, 1)

  * To configure the serial port settings for handle 0x6B to 9600bps, even
    parity, 8 data bits, and 1 stop bit:
    Shell> sermode 6B 9600 e 8 1 
    sermode: Mode set on handle 04F06B08