timer.h File Reference

Utilize the built-in timer. More...

#include <eris/types.h>

Go to the source code of this file.

Functions
void	eris_timer_init (void)
	Initialize the timer.
void	eris_timer_set_period (int period)
	Set the period of the timer.
int	eris_timer_read_counter (void)
	Read the current value of the timer.
void	eris_timer_ack_irq (void)
	Acknowledge a timer IRQ.
u16	eris_timer_read_control (void)
	Read the timer's control register.
void	eris_timer_write_control (int cr)
	Write the timer's control register.
void	eris_timer_start (int irq)
	Start the timer.
void	eris_timer_stop (void)
	Stop the timer.

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Detailed Description

Utilize the built-in timer.

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Function Documentation

u16 eris_timer_read_control

(

void

)

Read the timer's control register.

Returns:

The control register.

int eris_timer_read_counter

(

void

)

Read the current value of the timer.

Returns:

The current value of the timer.

void eris_timer_set_period

(

int

period

)

Set the period of the timer.

Period is in ticks of CPUclk/15. New period will not load until either the timer is restarted, or expires. period The period of the timer. (1 ~ 65535)

void eris_timer_start

(

int

irq

)

Start the timer.

Parameters:

irq	If 1, fire an IRQ at timer expiration.

void eris_timer_write_control

(

int

cr

)

Write the timer's control register.

Parameters:

cr	The new control register.