pit.h File Reference

x86 legacy timer driver (PIT). More...

Macros
#define	PIT_TIMER0_PERIOD_NS   838
	Period of LPC timer 0 counter, in nanoseconds.

Functions
void	pit_timer0_set (uint16_t count, bool periodic, bool only_lsb)
	Set hardware timer mode and count value. More...
uint16_t	pit_timer0_read (void)
	Read current value of timer. More...

Detailed Description

x86 legacy timer driver (PIT).

Function Documentation

uint16_t pit_timer0_read

(

void

)

Read current value of timer.

Returns

the current value of timer 0

void pit_timer0_set	(	uint16_t	count,
		bool	periodic,
		bool	only_lsb
	)

Set hardware timer mode and count value.

Sets timer 0 as either a rate generator (mode 2) or one-shot timer (mode 0) and sets its value. This function currently does not deal with any other timers.

Parameters

count	Count for oneshot timer, rate for ticker
periodic	True for a periodic timer, false for oneshot