Keyboard Class Reference

Handles keystrokes. More...

#include <device/keyboard.h>

Inheritance diagram for Keyboard:

Collaboration diagram for Keyboard:

Public Member Functions
	Keyboard ()
	Constructor.
void	plugin ()
	Initialization of the keyboard. More...
void	trigger () override
	Handling of keyboard interrupts. More...
Public Member Functions inherited from Gate
	Gate ()
	Constructor.
virtual	~Gate ()
	Destructor. More...
virtual void	trigger ()=0
	Device-specific interrupt handler. More...

Detailed Description

Handles keystrokes.

This class ensures correct initialization of the keyboard and, above all, its interrupt handling.

Member Function Documentation

plugin()

void Keyboard::plugin

(

)

Initialization of the keyboard.

Initialization of the keyboard and activation of the specific interrupt handling: The object will register itself at the Plugbox and configure the IOAPIC to receive the corresponding interrupts.

Note

The keyboard interrupts should be configured as level triggered. According to the standard we would have to check the corresponding entry in ACPI::MADS::Interrupt_Source_Override and use these values. Most likely this would suggest an edge-triggered mode – which would work as well. However, using a level-triggered mode is more forgiving because it resends the interrupt request even if an interrupt was lost (e.g. the required handling, retrieving the buffer entry, was not performed).

Todo:

Implement Method

trigger()

void Keyboard::trigger ( )

overridevirtual

Handling of keyboard interrupts.

Processes interrupts triggered by the keyboard. On each keystroke it outputs the corresponding character on the screen – only valid keys are printed, for the sake of simplicity all in a separate line dedicated to the keyboard. If the key combination Ctrl + Alt + Del is pressed, a reboot is triggered.

Todo:

Implement Method

Implements Gate.

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

• device/keyboard.h
• device/keyboard.cc