Functions
int	timer_set_rate (unsigned long timer, unsigned long rate)
	Configures a timer to generate a square wave.
int	timer_get_status (unsigned long timer, u8_t *st)
	Reads the the mode in which a timer was programmed.
int	timer_show_status (unsigned long timer)
	Shows the mode in which a timer was programmed.
unsigned long	timer_subscribe_int (void)
	Subscribes and enables Timer 0 interrupts.
int	timer_unsubscribe_int ()
	Unsubscribes Timer 0 interrupts.

Detailed Description

Functions for using the i8254 timers

Function Documentation

int timer_set_rate	(	unsigned long	timer,
		unsigned long	rate
	)

Configures a timer to generate a square wave.

Parameters:

timer	Timer to configure. (Ranges from 0 to 2)
rate	Frequency of the square wave to generate

Returns:: Return 0 upon success and non-zero otherwise

int timer_get_status	(	unsigned long	timer,
		u8_t *	st
	)

Reads the the mode in which a timer was programmed.

Parameters:

timer	Timer whose status to read (Ranges from 0 to 2)
st	Address of memory position to be filled with the timer status

Returns:: Return 0 upon success and non-zero otherwise

int timer_show_status ( unsigned long timer )

Shows the mode in which a timer was programmed.

Displays in a human friendly way, the configuration of the input timer, by providing the values (and meanings) of the different components of a timer status information

Parameters:

timer Timer whose status to read (Ranges from 0 to 2)

Returns:: Return 0 upon success and non-zero otherwise

unsigned long timer_subscribe_int ( void )

Subscribes and enables Timer 0 interrupts.

Returns:: Returns bitmask for this interrupt, upon success, 0 upon failure

int timer_unsubscribe_int ( )

Unsubscribes Timer 0 interrupts.

Returns:: Return 0 upon success and non-zero otherwise