KeyDecoder Class Reference

Decoder for keyboard codes received from the PS2Controller. More...

#include <machine/keydecoder.h>

Collaboration diagram for KeyDecoder:

Public Member Functions
	KeyDecoder ()
	Default constructor.
Key	decode (unsigned char code)
	Interprets the make and break codes received from the keyboard and derives the corresponding scan code and further information about other pressed keys, such as shift and ctrl.

Public Attributes
bool	status [Key::Scancode::KEYS]
	Current state (pressed or released) of all keys.

Private Attributes
unsigned char	prefix
	Prefix byte for keys.
Key	modifier
	activated modifier keys (e.g., caps lock)

Detailed Description

Decoder for keyboard codes received from the PS2Controller.

Extracts the make and break codes, modifier and scan codes from the pressed key.

Constructor & Destructor Documentation

KeyDecoder()

KeyDecoder::KeyDecoder ( )

inline

Default constructor.

Member Function Documentation

decode()

Key KeyDecoder::decode

(

unsigned char

code

)

Interprets the make and break codes received from the keyboard and derives the corresponding scan code and further information about other pressed keys, such as shift and ctrl.

Parameters

code	Byte from Keyboard to decode

Returns

Pressed key (Key::valid returns false if the key is not yet complete)

Member Data Documentation

prefix

unsigned char KeyDecoder::prefix

private

Prefix byte for keys.

modifier

Key KeyDecoder::modifier

private

activated modifier keys (e.g., caps lock)

status

bool KeyDecoder::status[Key::Scancode::KEYS]

Current state (pressed or released) of all keys.

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The documentation for this class was generated from the following files:

• machine/keydecoder.h
• machine/keydecoder.cc