Aufgabe 2: Unterbrechungen
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
| 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
|
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.
The documentation for this class was generated from the following files:
- device/keyboard.h
- device/keyboard.cc