Serial_io.write() – Intel Extensible Firmware Interface User Manual
Page 358
Extensible Firmware Interface Specification
10-64
12/01/02
Version 1.10
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
instance. Type
SERIAL_IO_INTERFACE
is defined in Section 10.12.
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.