Ewm

Data Structures
struct	_ewm_config
	Describes EWM clock source. More...

Variables
bool	_ewm_config::enableEwm
bool	_ewm_config::enableEwmInput
bool	_ewm_config::setInputAssertLogic
bool	_ewm_config::enableInterrupt
uint8_t	_ewm_config::compareLowValue
uint8_t	_ewm_config::compareHighValue

Driver version
enum	_ewm_interrupt_enable_t { kEWM_InterruptEnable = EWM_CTRL_INTEN_MASK }
	EWM interrupt configuration structure with default settings all disabled. More...
enum	_ewm_status_flags_t { kEWM_RunningFlag = EWM_CTRL_EWMEN_MASK }
	EWM status flags. More...
typedef struct _ewm_config	ewm_config_t
	Describes EWM clock source. More...
#define	FSL_EWM_DRIVER_VERSION   (MAKE_VERSION(2, 0, 3))
	EWM driver version 2.0.3.

EWM initialization and de-initialization
void	EWM_Init (EWM_Type *base, const ewm_config_t *config)
	Initializes the EWM peripheral. More...
void	EWM_Deinit (EWM_Type *base)
	Deinitializes the EWM peripheral. More...
void	EWM_GetDefaultConfig (ewm_config_t *config)
	Initializes the EWM configuration structure. More...

EWM functional Operation
void	EWM_Refresh (EWM_Type *base)
	Services the EWM. More...

Detailed Description

Typedef Documentation

ewm_config_t

typedef struct _ewm_config ewm_config_t

Describes EWM clock source.

Data structure for EWM configuration.

This structure is used to configure the EWM.

Enumeration Type Documentation

_ewm_interrupt_enable_t

enum _ewm_interrupt_enable_t

EWM interrupt configuration structure with default settings all disabled.

This structure contains the settings for all of EWM interrupt configurations.

Enumerator
kEWM_InterruptEnable	Enable the EWM to generate an interrupt

_ewm_status_flags_t

enum _ewm_status_flags_t

EWM status flags.

This structure contains the constants for the EWM status flags for use in the EWM functions.

Enumerator
kEWM_RunningFlag	Running flag, set when EWM is enabled

Function Documentation

EWM_Deinit()

void EWM_Deinit

(

EWM_Type *

base

)

Deinitializes the EWM peripheral.

This function is used to shut down the EWM.

Parameters

base	EWM peripheral base address

brief Deinitializes the EWM peripheral.

This function is used to shut down the EWM.

param base EWM peripheral base address

EWM_GetDefaultConfig()

void EWM_GetDefaultConfig

(

ewm_config_t *

config

)

Initializes the EWM configuration structure.

This function initializes the EWM configuration structure to default values. The default values are as follows.

ewmConfig->enableEwm = true;
ewmConfig->enableEwmInput = false;
ewmConfig->setInputAssertLogic = false;
ewmConfig->enableInterrupt = false;
ewmConfig->ewm_lpo_clock_source_t = kEWM_LpoClockSource0;
ewmConfig->prescaler = 0;
ewmConfig->compareLowValue = 0;
ewmConfig->compareHighValue = 0xFEU;

Parameters

config

Pointer to the EWM configuration structure.

See also

ewm_config_t

brief Initializes the EWM configuration structure.

This function initializes the EWM configuration structure to default values. The default values are as follows. code ewmConfig->enableEwm = true; ewmConfig->enableEwmInput = false; ewmConfig->setInputAssertLogic = false; ewmConfig->enableInterrupt = false; ewmConfig->ewm_lpo_clock_source_t = kEWM_LpoClockSource0; ewmConfig->prescaler = 0; ewmConfig->compareLowValue = 0; ewmConfig->compareHighValue = 0xFEU; endcode

param config Pointer to the EWM configuration structure. see ewm_config_t

EWM_Init()

void EWM_Init	(	EWM_Type *	base,
		const ewm_config_t *	config
	)

Initializes the EWM peripheral.

This function is used to initialize the EWM. After calling, the EWM runs immediately according to the configuration. Note that, except for the interrupt enable control bit, other control bits and registers are write once after a CPU reset. Modifying them more than once generates a bus transfer error.

This is an example.

ewm_config_t config;
EWM_GetDefaultConfig(&config);
config.compareHighValue = 0xAAU;
EWM_Init(ewm_base,&config);

Parameters

base	EWM peripheral base address
config	The configuration of the EWM

brief Initializes the EWM peripheral.

This function is used to initialize the EWM. After calling, the EWM runs immediately according to the configuration. Note that, except for the interrupt enable control bit, other control bits and registers are write once after a CPU reset. Modifying them more than once generates a bus transfer error.

This is an example. code ewm_config_t config; EWM_GetDefaultConfig(&config); config.compareHighValue = 0xAAU; EWM_Init(ewm_base,&config); endcode

param base EWM peripheral base address param config The configuration of the EWM

EWM_Refresh()

void EWM_Refresh

(

EWM_Type *

base

)

Services the EWM.

This function resets the EWM counter to zero.

Parameters

base	EWM peripheral base address

brief Services the EWM.

This function resets the EWM counter to zero.

param base EWM peripheral base address

Variable Documentation

compareHighValue

uint8_t _ewm_config::compareHighValue

Compare high-register value

compareLowValue

uint8_t _ewm_config::compareLowValue

Compare low-register value

enableEwm

bool _ewm_config::enableEwm

Enable EWM module

enableEwmInput

bool _ewm_config::enableEwmInput

Enable EWM_in input

enableInterrupt

bool _ewm_config::enableInterrupt

Enable EWM interrupt

setInputAssertLogic

bool _ewm_config::setInputAssertLogic

EWM_in signal assertion state