Kpp

Data Structures
struct	_kpp_config
	Lists of KPP status. More...

Variables
uint8_t	_kpp_config::activeRow
uint8_t	_kpp_config::activeColumn
uint16_t	_kpp_config::interrupt

Driver version
enum	_kpp_interrupt_enable { kKPP_keyDepressInterrupt = KPP_KPSR_KDIE_MASK , kKPP_keyReleaseInterrupt = KPP_KPSR_KRIE_MASK }
	List of interrupts supported by the peripheral. This enumeration uses one-bot encoding to allow a logical OR of multiple members. Members usually map to interrupt enable bits in one or more peripheral registers. More...
enum	_kpp_sync_operation { kKPP_ClearKeyDepressSyncChain = KPP_KPSR_KDSC_MASK , kKPP_SetKeyReleasesSyncChain = KPP_KPSR_KRSS_MASK }
	Lists of KPP synchronize chain operation. More...
typedef enum _kpp_interrupt_enable	kpp_interrupt_enable_t
	List of interrupts supported by the peripheral. This enumeration uses one-bot encoding to allow a logical OR of multiple members. Members usually map to interrupt enable bits in one or more peripheral registers.
typedef enum _kpp_sync_operation	kpp_sync_operation_t
	Lists of KPP synchronize chain operation.
typedef struct _kpp_config	kpp_config_t
	Lists of KPP status.
#define	FSL_KPP_DRIVER_VERSION   (MAKE_VERSION(2, 0, 0))
	KPP driver version 2.0.0.
#define	KPP_KEYPAD_COLUMNNUM_MAX   (8U)
#define	KPP_KEYPAD_ROWNUM_MAX   (8U)

Initialization and De-initialization
void	KPP_Init (KPP_Type *base, kpp_config_t *configure)
	KPP initialize. This function ungates the KPP clock and initializes KPP. This function must be called before calling any other KPP driver functions. More...
void	KPP_Deinit (KPP_Type *base)
	Deinitializes the KPP module and gates the clock. This function gates the KPP clock. As a result, the KPP module doesn't work after calling this function. More...

KPP Basic Operation
void	KPP_keyPressScanning (KPP_Type *base, uint8_t *data, uint32_t clockSrc_Hz)
	Keypad press scanning. More...

Detailed Description

Enumeration Type Documentation

_kpp_interrupt_enable

enum _kpp_interrupt_enable

List of interrupts supported by the peripheral. This enumeration uses one-bot encoding to allow a logical OR of multiple members. Members usually map to interrupt enable bits in one or more peripheral registers.

Enumerator
kKPP_keyDepressInterrupt	Keypad depress interrupt source
kKPP_keyReleaseInterrupt	Keypad release interrupt source

_kpp_sync_operation

enum _kpp_sync_operation

Lists of KPP synchronize chain operation.

Enumerator
kKPP_ClearKeyDepressSyncChain	Keypad depress interrupt status.
kKPP_SetKeyReleasesSyncChain	Keypad release interrupt status.

Function Documentation

KPP_Deinit()

void KPP_Deinit

(

KPP_Type *

base

)

Deinitializes the KPP module and gates the clock. This function gates the KPP clock. As a result, the KPP module doesn't work after calling this function.

Parameters

base	KPP peripheral base address.

brief Deinitializes the KPP module and gates the clock. This function gates the KPP clock. As a result, the KPP module doesn't work after calling this function.

param base KPP peripheral base address.

KPP_Init()

void KPP_Init	(	KPP_Type *	base,
		kpp_config_t *	configure
	)

KPP initialize. This function ungates the KPP clock and initializes KPP. This function must be called before calling any other KPP driver functions.

Parameters

base	KPP peripheral base address.
configure	The KPP configuration structure pointer.

brief KPP initialize. This function ungates the KPP clock and initializes KPP. This function must be called before calling any other KPP driver functions.

param base KPP peripheral base address. param configure The KPP configuration structure pointer.

KPP_keyPressScanning()

void KPP_keyPressScanning	(	KPP_Type *	base,
		uint8_t *	data,
		uint32_t	clockSrc_Hz
	)

Keypad press scanning.

This function will scanning all columns and rows. so all scanning data will be stored in the data pointer.

Parameters

base	KPP peripheral base address.
data	KPP key press scanning data. The data buffer should be prepared with length at least equal to KPP_KEYPAD_COLUMNNUM_MAX * KPP_KEYPAD_ROWNUM_MAX. the data pointer is recommended to be a array like uint8_t data[KPP_KEYPAD_COLUMNNUM_MAX]. for example the data[2] = 4, that means in column 1 row 2 has a key press event.
clockSrc_Hz	Source clock.

brief Keypad press scanning.

This function will scanning all columns and rows. so all scanning data will be stored in the data pointer.

param base KPP peripheral base address. param data KPP key press scanning data. The data buffer should be prepared with length at least equal to KPP_KEYPAD_COLUMNNUM_MAX * KPP_KEYPAD_ROWNUM_MAX. the data pointer is recommended to be a array like uint8_t data[KPP_KEYPAD_COLUMNNUM_MAX]. for example the data[2] = 4, that means in column 1 row 2 has a key press event. param clockSrc_Hz Source clock.

Variable Documentation

activeColumn

uint8_t _kpp_config::activeColumn

The column number: bit 7 ~ 0 represents the column 7 ~ 0.

activeRow

uint8_t _kpp_config::activeRow

The row number: bit 7 ~ 0 represents the row 7 ~ 0.

interrupt

uint16_t _kpp_config::interrupt

KPP interrupt source. A logical OR of "kpp_interrupt_enable_t".