Cwt

Overview

Files
file	fsl_cwt.h

Driver version
#define	FSL_CWT_DRIVER_VERSION   (MAKE_VERSION(2, 0, 1))
	Defines CWT driver version 2.0.1. More...

CWT Functional Operation
status_t	CWT_Init (CDOG_Type *base, cwt_config_t *conf)
	Initialize CWT. More...
void	CWT_Deinit (CDOG_Type *base)
	Deinitialize CWT. More...
void	CWT_GetDefaultConfig (cwt_config_t *conf)
	Sets the default configuration of CWT. More...
void	CWT_Stop (CDOG_Type *base, uint32_t stop)
	Stops secure counter and instruction timer. More...
void	CWT_Start (CDOG_Type *base, uint32_t reload, uint32_t start)
	Sets secure counter and instruction timer values. More...
void	CWT_Check (CDOG_Type *base, uint32_t check)
	Checks secure counter. More...
void	CWT_Set (CDOG_Type *base, uint32_t stop, uint32_t reload, uint32_t start)
	Sets secure counter and instruction timer values. More...
void	CWT_Add (CDOG_Type *base, uint32_t add)
	Add value to secure counter. More...
void	CWT_Add1 (CDOG_Type *base)
	Add 1 to secure counter. More...
void	CWT_Add16 (CDOG_Type *base)
	Add 16 to secure counter. More...
void	CWT_Add256 (CDOG_Type *base)
	Add 256 to secure counter. More...
void	CWT_Sub (CDOG_Type *base, uint32_t sub)
	brief Substract value to secure counter More...
void	CWT_Sub1 (CDOG_Type *base)
	Substract 1 from secure counter. More...
void	CWT_Sub16 (CDOG_Type *base)
	Substract 16 from secure counter. More...
void	CWT_Sub256 (CDOG_Type *base)
	Substract 256 from secure counter. More...
void	CWT_WritePersistent (CDOG_Type *base, uint32_t value)
	Set the CWT persistent word. More...
uint32_t	CWT_ReadPersistent (CDOG_Type *base)
	Get the CWT persistent word. More...

Macro Definition Documentation

#define FSL_CWT_DRIVER_VERSION   (MAKE_VERSION(2, 0, 1))

Change log:

• Version 2.0.1
  • Fix doxygen issues
• Version 2.0.0
  • initial version

Function Documentation

status_t CWT_Init	(	CDOG_Type *	base,
		cwt_config_t *	conf
	)

This function initializes CWT block and setting.

Parameters

base	CWT peripheral base address
conf	CWT configuration structure

Returns

Status of the init operation

void CWT_Deinit

(

CDOG_Type *

base

)

This function deinitializes CWT secure counter.

Parameters

base	CWT peripheral base address

void CWT_GetDefaultConfig

(

cwt_config_t *

conf

)

This function initialize CWT config structure to default values.

Parameters

conf	CWT configuration structure

void CWT_Stop	(	CDOG_Type *	base,
		uint32_t	stop
	)

This function stops instruction timer and secure counter. This also change state od CWT to IDLE.

Parameters

base	CWT peripheral base address
stop	expected value which will be compared with value of secure counter

void CWT_Start	(	CDOG_Type *	base,
		uint32_t	reload,
		uint32_t	start
	)

This function sets value in RELOAD and START registers for instruction timer and secure counter

Parameters

base	CWT peripheral base address
reload	reload value
start	start value

void CWT_Check	(	CDOG_Type *	base,
		uint32_t	check
	)

This function compares stop value in handler with secure counter value by writting to RELOAD refister.

Parameters

base	CWT peripheral base address
check	expected (stop) value

void CWT_Set	(	CDOG_Type *	base,
		uint32_t	stop,
		uint32_t	reload,
		uint32_t	start
	)

This function sets value in STOP, RELOAD and START registers for instruction timer and secure counter.

Parameters

base	CWT peripheral base address
stop	expected value which will be compared with value of secure counter
reload	reload value for instruction timer
start	start value for secure timer

void CWT_Add	(	CDOG_Type *	base,
		uint32_t	add
	)

This function add specified value to secure counter.

Parameters

base	CWT peripheral base address.
add	Value to be added.

void CWT_Add1

(

CDOG_Type *

base

)

This function add 1 to secure counter.

Parameters

base	CWT peripheral base address.

void CWT_Add16

(

CDOG_Type *

base

)

This function add 16 to secure counter.

Parameters

base	CWT peripheral base address.

void CWT_Add256

(

CDOG_Type *

base

)

This function add 256 to secure counter.

Parameters

base	CWT peripheral base address.

void CWT_Sub	(	CDOG_Type *	base,
		uint32_t	sub
	)

This function substract specified value to secure counter.

param base CWT peripheral base address. param sub Value to be substracted.

void CWT_Sub1

(

CDOG_Type *

base

)

This function substract specified 1 from secure counter.

Parameters

base	CWT peripheral base address.

void CWT_Sub16

(

CDOG_Type *

base

)

This function substract specified 16 from secure counter.

Parameters

base	CWT peripheral base address.

void CWT_Sub256

(

CDOG_Type *

base

)

This function substract specified 256 from secure counter.

Parameters

base	CWT peripheral base address.

void CWT_WritePersistent	(	CDOG_Type *	base,
		uint32_t	value
	)

Parameters

base	CWT peripheral base address.
value	The value to be written.

uint32_t CWT_ReadPersistent

(

CDOG_Type *

base

)

Parameters

base	CWT peripheral base address.

Returns

The persistent word.