Overview

The MCUXpresso SDK provides a peripheral driver for the General-Purpose Input/Output (GPIO) module of MCUXpresso SDK devices.

Typical use case

Input Operation

Refer to the driver examples codes located at <SDK_ROOT>/boards/<BOARD>/driver_examples/gpio

Data Structures
struct	gpio_pin_config_t
	GPIO Init structure definition. More...

Enumerations
enum	gpio_pin_direction_t { kGPIO_DigitalInput = 0U, kGPIO_DigitalOutput = 1U }
	GPIO direction definition. More...

enum	gpio_interrupt_mode_t { kGPIO_NoIntmode = 0U, kGPIO_IntLowLevel = 1U, kGPIO_IntHighLevel = 2U, kGPIO_IntRisingEdge = 3U, kGPIO_IntFallingEdge = 4U, kGPIO_IntRisingOrFallingEdge = 5U }
	GPIO interrupt mode definition. More...

Driver version
#define	FSL_GPIO_DRIVER_VERSION (MAKE_VERSION(2, 0, 1))
	GPIO driver version 2.0.1. More...

GPIO Initialization and Configuration functions
void	GPIO_PinInit (GPIO_Type base, uint32_t pin, const gpio_pin_config_t Config)
	Initializes the GPIO peripheral according to the specified parameters in the initConfig. More...

GPIO Reads and Write Functions
void	GPIO_PinWrite (GPIO_Type *base, uint32_t pin, uint8_t output)
	Sets the output level of the individual GPIO pin to logic 1 or 0. More...

static void	GPIO_WritePinOutput (GPIO_Type *base, uint32_t pin, uint8_t output)
	Sets the output level of the individual GPIO pin to logic 1 or 0. More...

static void	GPIO_PortSet (GPIO_Type *base, uint32_t mask)
	Sets the output level of the multiple GPIO pins to the logic 1. More...

static void	GPIO_SetPinsOutput (GPIO_Type *base, uint32_t mask)
	Sets the output level of the multiple GPIO pins to the logic 1. More...

static void	GPIO_PortClear (GPIO_Type *base, uint32_t mask)
	Sets the output level of the multiple GPIO pins to the logic 0. More...

static void	GPIO_ClearPinsOutput (GPIO_Type *base, uint32_t mask)
	Sets the output level of the multiple GPIO pins to the logic 0. More...

static void	GPIO_PortToggle (GPIO_Type *base, uint32_t mask)
	Reverses the current output logic of the multiple GPIO pins. More...

static uint32_t	GPIO_PinRead (GPIO_Type *base, uint32_t pin)
	Reads the current input value of the GPIO port. More...

static uint32_t	GPIO_ReadPinInput (GPIO_Type *base, uint32_t pin)
	Reads the current input value of the GPIO port. More...

GPIO Reads Pad Status Functions
static uint8_t	GPIO_PinReadPadStatus (GPIO_Type *base, uint32_t pin)
	Reads the current GPIO pin pad status. More...

static uint8_t	GPIO_ReadPadStatus (GPIO_Type *base, uint32_t pin)
	Reads the current GPIO pin pad status. More...

Interrupts and flags management functions
void	GPIO_PinSetInterruptConfig (GPIO_Type *base, uint32_t pin, gpio_interrupt_mode_t pinInterruptMode)
	Sets the current pin interrupt mode. More...

static void	GPIO_SetPinInterruptConfig (GPIO_Type *base, uint32_t pin, gpio_interrupt_mode_t pinInterruptMode)
	Sets the current pin interrupt mode. More...

static void	GPIO_PortEnableInterrupts (GPIO_Type *base, uint32_t mask)
	Enables the specific pin interrupt. More...

static void	GPIO_EnableInterrupts (GPIO_Type *base, uint32_t mask)
	Enables the specific pin interrupt. More...

static void	GPIO_PortDisableInterrupts (GPIO_Type *base, uint32_t mask)
	Disables the specific pin interrupt. More...

static void	GPIO_DisableInterrupts (GPIO_Type *base, uint32_t mask)
	Disables the specific pin interrupt. More...

static uint32_t	GPIO_PortGetInterruptFlags (GPIO_Type *base)
	Reads individual pin interrupt status. More...

static uint32_t	GPIO_GetPinsInterruptFlags (GPIO_Type *base)
	Reads individual pin interrupt status. More...

static void	GPIO_PortClearInterruptFlags (GPIO_Type *base, uint32_t mask)
	Clears pin interrupt flag. More...

static void	GPIO_ClearPinsInterruptFlags (GPIO_Type *base, uint32_t mask)
	Clears pin interrupt flag. More...

Data Structure Documentation

struct gpio_pin_config_t

Data Fields
gpio_pin_direction_t	direction
	Specifies the pin direction. More...

uint8_t	outputLogic
	Set a default output logic, which has no use in input.

gpio_interrupt_mode_t	interruptMode
	Specifies the pin interrupt mode, a value of gpio_interrupt_mode_t. More...

Field Documentation

gpio_pin_direction_t gpio_pin_config_t::direction

gpio_interrupt_mode_t gpio_pin_config_t::interruptMode

Macro Definition Documentation

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

Enumeration Type Documentation

enum gpio_pin_direction_t

Enumerator
kGPIO_DigitalInput	Set current pin as digital input.
kGPIO_DigitalOutput	Set current pin as digital output.

enum gpio_interrupt_mode_t

Enumerator
kGPIO_NoIntmode	Set current pin general IO functionality.
kGPIO_IntLowLevel	Set current pin interrupt is low-level sensitive.
kGPIO_IntHighLevel	Set current pin interrupt is high-level sensitive.
kGPIO_IntRisingEdge	Set current pin interrupt is rising-edge sensitive.
kGPIO_IntFallingEdge	Set current pin interrupt is falling-edge sensitive.
kGPIO_IntRisingOrFallingEdge	Enable the edge select bit to override the ICR register's configuration.

Function Documentation

void GPIO_PinInit	(	GPIO_Type *	base,
		uint32_t	pin,
		const gpio_pin_config_t *	Config
	)

Parameters

base	GPIO base pointer.
pin	Specifies the pin number
initConfig	pointer to a gpio_pin_config_t structure that contains the configuration information.

void GPIO_PinWrite	(	GPIO_Type *	base,
		uint32_t	pin,
		uint8_t	output
	)

Parameters

base	GPIO base pointer.
pin	GPIO port pin number.
output	GPIOpin output logic level. 0: corresponding pin output low-logic level. 1: corresponding pin output high-logic level.

static void GPIO_WritePinOutput	(	GPIO_Type *	base,
		uint32_t	pin,
		uint8_t	output
	)

inlinestatic

static void GPIO_PortSet	(	GPIO_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	GPIO peripheral base pointer (GPIO1, GPIO2, GPIO3, and so on.)
mask	GPIO pin number macro

static void GPIO_SetPinsOutput	(	GPIO_Type *	base,
		uint32_t	mask
	)

inlinestatic

static void GPIO_PortClear	(	GPIO_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	GPIO peripheral base pointer (GPIO1, GPIO2, GPIO3, and so on.)
mask	GPIO pin number macro

static void GPIO_ClearPinsOutput	(	GPIO_Type *	base,
		uint32_t	mask
	)

inlinestatic

static void GPIO_PortToggle	(	GPIO_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	GPIO peripheral base pointer (GPIO1, GPIO2, GPIO3, and so on.)
mask	GPIO pin number macro

static uint32_t GPIO_PinRead	(	GPIO_Type *	base,
		uint32_t	pin
	)

inlinestatic

Parameters

base	GPIO base pointer.
pin	GPIO port pin number.

Return values

GPIO	port input value.

static uint32_t GPIO_ReadPinInput	(	GPIO_Type *	base,
		uint32_t	pin
	)

inlinestatic

static uint8_t GPIO_PinReadPadStatus	(	GPIO_Type *	base,
		uint32_t	pin
	)

inlinestatic

Parameters

base	GPIO base pointer.
pin	GPIO port pin number.

Return values

GPIO	pin pad status value.

static uint8_t GPIO_ReadPadStatus	(	GPIO_Type *	base,
		uint32_t	pin
	)

inlinestatic

void GPIO_PinSetInterruptConfig	(	GPIO_Type *	base,
		uint32_t	pin,
		gpio_interrupt_mode_t	pinInterruptMode
	)

Parameters

base	GPIO base pointer.
pin	GPIO port pin number.
pininterruptMode	pointer to a gpio_interrupt_mode_t structure that contains the interrupt mode information.

static void GPIO_SetPinInterruptConfig	(	GPIO_Type *	base,
		uint32_t	pin,
		gpio_interrupt_mode_t	pinInterruptMode
	)

inlinestatic

static void GPIO_PortEnableInterrupts	(	GPIO_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	GPIO base pointer.
mask	GPIO pin number macro.

static void GPIO_EnableInterrupts	(	GPIO_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	GPIO base pointer.
mask	GPIO pin number macro.

static void GPIO_PortDisableInterrupts	(	GPIO_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	GPIO base pointer.
mask	GPIO pin number macro.

static void GPIO_DisableInterrupts	(	GPIO_Type *	base,
		uint32_t	mask
	)

inlinestatic

static uint32_t GPIO_PortGetInterruptFlags ( GPIO_Type * base )

inlinestatic

Parameters

base	GPIO base pointer.

Return values

current pin interrupt status flag.

static uint32_t GPIO_GetPinsInterruptFlags ( GPIO_Type * base )

inlinestatic

Parameters

base	GPIO base pointer.

Return values

current pin interrupt status flag.

static void GPIO_PortClearInterruptFlags	(	GPIO_Type *	base,
		uint32_t	mask
	)

inlinestatic

Status flags are cleared by writing a 1 to the corresponding bit position.

Parameters

base	GPIO base pointer.
mask	GPIO pin number macro.

static void GPIO_ClearPinsInterruptFlags	(	GPIO_Type *	base,
		uint32_t	mask
	)

inlinestatic

Status flags are cleared by writing a 1 to the corresponding bit position.

Parameters

base	GPIO base pointer.
mask	GPIO pin number macro.

Overview

Typical use case

Input Operation

Data Structures

Enumerations

Driver version

GPIO Initialization and Configuration functions

GPIO Reads and Write Functions

GPIO Reads Pad Status Functions

Interrupts and flags management functions

Data Structure Documentation

Data Fields

Field Documentation

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation