Intel Extensible Firmware Interface, Specification

Page: 241 / 494

Serial I/O Protocol
Version 1.02 12/12/00 223
12.1.5 SERIAL_IO.Write()
Summary
Writes data to a serial device.
Prototype
EFI_STATUS
(EFIAPI *EFI_SERIAL_WRITE) (
IN SERIAL_IO_INTERFACE *This,
IN OUT UINTN *BufferSize,
IN VOID *Buffer
);
Parameters
This
A pointer to the
SERIAL_IO_INTERFACE
instance. Type
SERIAL_IO_INTERFACE
is defined in Section 12.1.
BufferSize
On input, the size of the
Buffer
. On output, the amount of
data actually written.
Buffer
The buffer of data to write.
Description
The
Write()
function writes the specified number of bytes to a serial device. If a time out error
occurs while data is being sent to the serial port, transmission of this buffer will terminate, and
EFI_TIMEOUT
will be returned. In all cases the number of bytes actually written to the serial
device is returned in
BufferSize
.
Status Codes Returned
EFI_SUCCESS The data was written.
EFI_DEVICE_ERROR The device reported an error.
EFI_TIMEOUT The data write was stopped due to a timeout.