pit.h File Reference

#include <stdint.h>

Include dependency graph for pit.h:

Macros
#define	PIT_FREQUENCY_HZ   100
	The timer frequency.

Functions
void	pit_init ()
uint64_t	pit_uptime ()
uint64_t	pit_tick ()

Detailed Description

See also

http://www.osdever.net/bkerndev/Docs/pit.htm

https://wiki.osdev.org/Programmable_Interval_Timer

https://ethv.net/workshops/osdev/notes/notes-4.html

Programmable Interval Timer (PIT).

Function Documentation

pit_init()

void pit_init

(

)

Initializes the PIT.

pit_tick()

uint64_t pit_tick

(

)

Returns the number of ticks since the timer has been initialized.

Returns

the number of ticks since the timer has been initialized

pit_uptime()

uint64_t pit_uptime

(

)

Returns the number of seconds since the timer has been initialized.

Returns

the number of seconds since the timer has been initialized