APIs for timer setup and control

Introduction

This module define's generic APIs to configure and control a timer Depending on the SOC there can be different timer implementation's

Timer is used by Clock to generate system ticks.

Currently below timer implementations are supported

• DM Timer (AM64x, AM243x)
• RTI Timer (AM263x, AM273x, AWR294x)

Data Structures
struct	TimerP_Params
	Parameters for TimerP_setup. More...

Functions
void	TimerP_Params_init (TimerP_Params *params)
	Set default value for TimerP_Params. More...
void	TimerP_setup (uint32_t baseAddr, TimerP_Params *params)
	Setup timer but does not start it. More...
void	TimerP_start (uint32_t baseAddr)
	Start timer. More...
void	TimerP_stop (uint32_t baseAddr)
	Stop timer. More...
uint32_t	TimerP_getCount (uint32_t baseAddr)
	Get timer current count. More...
uint32_t	TimerP_getReloadCount (uint32_t baseAddr)
	Get timer reload count. More...
void	TimerP_clearOverflowInt (uint32_t baseAddr)
	Clear timer overflow interrupt. More...
uint32_t	TimerP_isOverflowed (uint32_t baseAddr)
	Check if timer is overflowed. More...

Function Documentation

TimerP_Params_init()

void TimerP_Params_init

(

TimerP_Params *

params

)

Set default value for TimerP_Params.

Parameters

params

[out] timer parameters initalized to default

TimerP_setup()

void TimerP_setup	(	uint32_t	baseAddr,
		TimerP_Params *	params
	)

Setup timer but does not start it.

Parameters

baseAddr	[in] HW timer base addresss
params	[in] timer parameters

TimerP_start()

void TimerP_start

(

uint32_t

baseAddr

)

Start timer.

Parameters

baseAddr

[in] HW timer base addresss

TimerP_stop()

void TimerP_stop

(

uint32_t

baseAddr

)

Stop timer.

Parameters

baseAddr

[in] HW timer base addresss

TimerP_getCount()

uint32_t TimerP_getCount

(

uint32_t

baseAddr

)

Get timer current count.

Parameters

baseAddr

[in] HW timer base addresss

Returns

current timer count value

TimerP_getReloadCount()

uint32_t TimerP_getReloadCount

(

uint32_t

baseAddr

)

Get timer reload count.

Parameters

baseAddr

[in] HW timer base addresss

Returns

reload count value

TimerP_clearOverflowInt()

void TimerP_clearOverflowInt

(

uint32_t

baseAddr

)

Clear timer overflow interrupt.

Parameters

baseAddr

[in] HW timer base addresss

TimerP_isOverflowed()

uint32_t TimerP_isOverflowed

(

uint32_t

baseAddr

)

Check if timer is overflowed.

Note

make sure to clear overflow status TimerP_clearOverflowInt

Parameters

baseAddr

[in] HW timer base addresss