IO operation functions

GPIO Read and Write. More...

Collaboration diagram for IO operation functions:

Functions
GPIO_PinState	HAL_GPIO_ReadPin (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
	Reads the specified input port pin.
void	HAL_GPIO_WritePin (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin, GPIO_PinState PinState)
	Sets or clears the selected data port bit.
void	HAL_GPIO_TogglePin (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
	Toggles the specified GPIO pins.
HAL_StatusTypeDef	HAL_GPIO_LockPin (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
	Locks GPIO Pins configuration registers.
void	HAL_GPIO_EXTI_IRQHandler (uint16_t GPIO_Pin)
	This function handles EXTI interrupt request.
void	HAL_GPIO_EXTI_Callback (uint16_t GPIO_Pin)
	EXTI line detection callbacks.

Detailed Description

GPIO Read and Write.

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Function Documentation

HAL_GPIO_ReadPin()

GPIO_PinState HAL_GPIO_ReadPin	(	GPIO_TypeDef *	GPIOx,
		uint16_t	GPIO_Pin )

#include <stm32f4xx_hal_gpio.h>

Reads the specified input port pin.

Parameters

GPIOx	where x can be (A..K) to select the GPIO peripheral for STM32F429X device or x can be (A..I) to select the GPIO peripheral for STM32F40XX and STM32F427X devices.
GPIO_Pin	specifies the port bit to read. This parameter can be GPIO_PIN_x where x can be (0..15).

Return values

The	input port pin value.

Definition at line 375 of file stm32f4xx_hal_gpio.c.

References assert_param, GPIO_PIN_RESET, GPIO_PIN_SET, and IS_GPIO_PIN.

HAL_GPIO_WritePin()

void HAL_GPIO_WritePin	(	GPIO_TypeDef *	GPIOx,
		uint16_t	GPIO_Pin,
		GPIO_PinState	PinState )

#include <stm32f4xx_hal_gpio.h>

Sets or clears the selected data port bit.

Note

This function uses GPIOx_BSRR register to allow atomic read/modify accesses. In this way, there is no risk of an IRQ occurring between the read and the modify access.

Parameters

GPIOx	where x can be (A..K) to select the GPIO peripheral for STM32F429X device or x can be (A..I) to select the GPIO peripheral for STM32F40XX and STM32F427X devices.
GPIO_Pin	specifies the port bit to be written. This parameter can be one of GPIO_PIN_x where x can be (0..15).
PinState	specifies the value to be written to the selected bit. This parameter can be one of the GPIO_PinState enum values: GPIO_PIN_RESET: to clear the port pin GPIO_PIN_SET: to set the port pin

Return values

None

Definition at line 410 of file stm32f4xx_hal_gpio.c.

References assert_param, GPIO_PIN_RESET, IS_GPIO_PIN, and IS_GPIO_PIN_ACTION.

HAL_GPIO_TogglePin()

void HAL_GPIO_TogglePin	(	GPIO_TypeDef *	GPIOx,
		uint16_t	GPIO_Pin )

#include <stm32f4xx_hal_gpio.h>

Toggles the specified GPIO pins.

Parameters

GPIOx	Where x can be (A..K) to select the GPIO peripheral for STM32F429X device or x can be (A..I) to select the GPIO peripheral for STM32F40XX and STM32F427X devices.
GPIO_Pin	Specifies the pins to be toggled.

Return values

None

Definition at line 433 of file stm32f4xx_hal_gpio.c.

References assert_param, GPIO_NUMBER, and IS_GPIO_PIN.

HAL_GPIO_LockPin()

HAL_StatusTypeDef HAL_GPIO_LockPin	(	GPIO_TypeDef *	GPIOx,
		uint16_t	GPIO_Pin )

#include <stm32f4xx_hal_gpio.h>

Locks GPIO Pins configuration registers.

Note

The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR, GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH.

The configuration of the locked GPIO pins can no longer be modified until the next reset.

Parameters

GPIOx	where x can be (A..F) to select the GPIO peripheral for STM32F4 family
GPIO_Pin	specifies the port bit to be locked. This parameter can be any combination of GPIO_PIN_x where x can be (0..15).

Return values

None

Definition at line 458 of file stm32f4xx_hal_gpio.c.

References assert_param, HAL_ERROR, HAL_OK, and IS_GPIO_PIN.

HAL_GPIO_EXTI_IRQHandler()

void HAL_GPIO_EXTI_IRQHandler

(

uint16_t

GPIO_Pin

)

#include <stm32f4xx_hal_gpio.h>

This function handles EXTI interrupt request.

Parameters

GPIO_Pin

Specifies the pins connected EXTI line

Return values

None

Definition at line 492 of file stm32f4xx_hal_gpio.c.

References __HAL_GPIO_EXTI_CLEAR_IT, __HAL_GPIO_EXTI_GET_IT, and HAL_GPIO_EXTI_Callback().

HAL_GPIO_EXTI_Callback()

__weak void HAL_GPIO_EXTI_Callback

(

uint16_t

GPIO_Pin

)

#include <stm32f4xx_hal_gpio.h>

EXTI line detection callbacks.

Parameters

GPIO_Pin

Specifies the pins connected EXTI line

Return values

None

Definition at line 507 of file stm32f4xx_hal_gpio.c.

References UNUSED.

Referenced by HAL_GPIO_EXTI_IRQHandler().