Description, Status codes returned – Intel Extensible Firmware Interface User Manual
Page 301
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Protocols
— Console Support
Version 1.10
12/01/02
10-7
Description
The
ReadKeyStroke()
function reads the next keystroke from the input device. If there is
no pending keystroke the function returns
EFI_NOT_READY
. If there is a pending keystroke,
then
ScanCode
is the EFI scan code defined in Table 10-2. The
UnicodeChar
is the actual
printable character or is zero if the key does not represent a printable character (control key,
function key, etc.).
Status Codes Returned
EFI_SUCCESS
The keystroke information was returned.
EFI_NOT_READY
There was no keystroke data available.
EFI_DEVICE_ERROR
The keystroke information was not returned due to hardware errors.
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