Intel Extensible Firmware Interface, Specification

Page: 236 / 494

Extensible Firmware Interface Specification
218 12/12/00 Version 1.02
12.1.2 SERIAL_IO.SetAttributes()
Summary
Sets the baud rate, receive FIFO depth, transmit/receive time out, parity, data bits, and stop bits on a
serial device.
EFI_STATUS
(EFIAPI *EFI_SERIAL_SET_ATTRIBUTES) (
IN SERIAL_IO_INTERFACE *This,
IN UINT64 BaudRate,
IN UINT32 ReceiveFifoDepth,
IN UINT32 Timeout
IN EFI_PARITY_TYPE Parity,
IN UINT8 DataBits,
IN EFI_STOP_BITS_TYPE StopBits
);
Parameters
This
A pointer to the
SERIAL_IO_INTERFACE
instance. Type
SERIAL_IO_INTERFACE
is defined in Section 12.1.
BaudRate
The requested baud rate. A
BaudRate
value of 0 will use the
device’s default interface speed.
ReceiveFifoDepth
The requested depth of the FIFO on the receive side of the serial
interface. A
ReceiveFifoDepth
value of 0 will use the
device’s default FIFO depth.
Timeout
The requested time out for a single character in microseconds.
This timeout applies to both the transmit and receive side of the
interface. A
Timeout
value of 0 will use the device’s default
time out value.
Parity
The type of parity to use on this serial device. A
Parity
value
of
DefaultParity
will use the device’s default parity value.
Type
EFI_PARITY_TYPE
is defined in Section 12.1.
DataBits
The number of data bits to use on this serial device. A
DataBits
value of 0 will use the device’s default data bit
setting.
StopBits
The number of stop bits to use on this serial device. A
StopBits
value of
DefaultStopBits
will use the device’s
default number of stop bits. Type
EFI_STOP_BITS_TYPE
is
defined in Section 12.1.