Lpc_gpio

Overview

Files
file	fsl_gpio.h

Data Structures
struct	gpio_pin_config_t
	The GPIO pin configuration structure. More...

Enumerations
enum	gpio_pin_direction_t {   kGPIO_DigitalInput = 0U,   kGPIO_DigitalOutput = 1U }
	LPC GPIO direction definition. More...
enum	gpio_interrupt_mode_t {   kGPIO_IntDisabled = 0U,   kGPIO_IntLowLevel = 1U,   kGPIO_IntHighLevel = 2U,   kGPIO_IntRisingEdge = 3U,   kGPIO_IntFallingEdge = 4U,   kGPIO_IntRisingOrFallingEdge = 5U }
	GPIO interrupt mode definition. More...

Functions
void	GPIO_PinInit (GPIO_Type *base, uint32_t pin, const gpio_pin_config_t *Config)
	Initializes a GPIO pin used by the board. More...
void	GPIO_PortInit (GPIO_Type *base, uint32_t port)
	Initializes the GPIO peripheral. More...
void	GPIO_PinSetInterruptConfig (GPIO_Type *base, uint32_t pin, gpio_interrupt_mode_t pinInterruptMode)
	Initializes the GPIO peripheral. More...

Driver version
#define	FSL_GPIO_DRIVER_VERSION   (MAKE_VERSION(2, 0, 0))
	LPC GPIO driver version 2.0.0. More...

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Data Structure Documentation

struct gpio_pin_config_t

Every pin can only be configured as either output pin or input pin at a time. If configured as a input pin, then leave the outputConfig unused.

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.

Field Documentation

gpio_pin_direction_t gpio_pin_config_t::direction

Macro Definition Documentation

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

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_IntDisabled	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
	)

To initialize the GPIO, define a pin configuration, either input or output, in the user file. Then, call the GPIO_PinInit() function.

This is an example to define an input pin or output pin configuration:

* // Define a digital input pin configuration,
* gpio_pin_config_t config =
* {
*   kGPIO_DigitalInput,
*   0,
* }
* //Define a digital output pin configuration,
* gpio_pin_config_t config =
* {
*   kGPIO_DigitalOutput,
*   0,
* }
* 

Parameters

base	GPIO peripheral base pointer(Typically GPIO)
pin	GPIO pin number
Config	GPIO pin configuration pointer

void GPIO_PortInit	(	GPIO_Type *	base,
		uint32_t	port
	)

This function ungates the GPIO clock.

Parameters

base	GPIO peripheral base pointer.
port	GPIO port number.

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

This function ungates the GPIO clock.

Parameters

base	GPIO peripheral base pointer.
pin	GPIO pin number
pinInterruptMode	GPIO interrupt mode