keyboard.h File Reference

Kernel generic keyboard interface. More...

#include <stdbool.h>
#include "keycode.h"

Go to the source code of this file.

Data Structures
struct	keyboard_state
	struct to hold state of the keyboard in terms of modifier keys More...
struct	keyboard_event
	struct that holds a keyboard event More...

Typedefs
typedef bool(*	hal_poll_func_t) (void)
	typedef for generic hal polling function pointer.

Functions
int	keyboard_init (hal_poll_func_t poll)
	function to initialize the kernel keyboard system
bool	keyboard_poll ()
	function to poll the keyboard for available events
bool	keyboard_pop_event (struct keyboard_event *event)
	pop an event from the keyboard event queue.
void	keyboard_push_event (struct keyboard_event event)
	push event to the keyboard event queue
struct keyboard_state *	keyboard_get_state ()
	get the current modifier state of the keyboard

Detailed Description

Kernel generic keyboard interface.

Typedef Documentation

hal_poll_func_t

typedef bool(* hal_poll_func_t) (void)

typedef for generic hal polling function pointer.

This allows us, when initializing the keyboard to pass a polling function (e.g. ps2_poll) dynamically.

Function Documentation

keyboard_get_state()

struct keyboard_state * keyboard_get_state

(

)

get the current modifier state of the keyboard

Returns

a pointer to the keyboard's struct keyboard_state

keyboard_init()

int keyboard_init

(

hal_poll_func_t

poll

)

function to initialize the kernel keyboard system

Parameters

poll	generic HAL keyboard polling function

Returns

whether initialization passed or failed

keyboard_poll()

bool keyboard_poll

(

)

function to poll the keyboard for available events

Returns

true if new data has been pushed to event queue

Note

typically is called from irq.c, direct polling is slow

keyboard_pop_event()

bool keyboard_pop_event

(

struct keyboard_event *

event

)

pop an event from the keyboard event queue.

Parameters

event

buffer to store new event data in

Returns

whether there was any data in queue to pop

keyboard_push_event()

void keyboard_push_event

(

struct keyboard_event

event

)

push event to the keyboard event queue

Parameters

event

event to push to the queue

Note

can be used to simulate keypresses.

This function is typically called directly from the HAL keyboard driver. See ps2_keyboard.c for an example.