IO operation functions

GPIO Read, Write, Toggle, Lock and EXTI management functions. More...

Functions
GPIO_PinState	HAL_GPIO_ReadPin (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
	Read the specified input port pin.
void	HAL_GPIO_WritePin (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin, GPIO_PinState PinState)
	Set or clear the selected data port bit.
void	HAL_GPIO_TogglePin (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
	Toggle the specified GPIO pin.
HAL_StatusTypeDef	HAL_GPIO_LockPin (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
	Lock GPIO Pins configuration registers.
void	HAL_GPIO_EXTI_IRQHandler (uint16_t GPIO_Pin)
	Handle EXTI interrupt request.
__weak void	HAL_GPIO_EXTI_Callback (uint16_t GPIO_Pin)
	EXTI line detection callback.

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Detailed Description

GPIO Read, Write, Toggle, Lock and EXTI management functions.

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                       ##### IO operation functions #####
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Function Documentation

void HAL_GPIO_EXTI_Callback

(

uint16_t

GPIO_Pin

)

EXTI line detection callback.

Parameters:

GPIO_Pin,:

Specifies the port pin connected to corresponding EXTI line.

Return values:

None

Definition at line 540 of file stm32l4xx_hal_gpio.c.

Referenced by HAL_GPIO_EXTI_IRQHandler().

void HAL_GPIO_EXTI_IRQHandler

(

uint16_t

GPIO_Pin

)

Handle EXTI interrupt request.

Parameters:

GPIO_Pin,:

Specifies the port pin connected to corresponding EXTI line.

Return values:

None

Definition at line 525 of file stm32l4xx_hal_gpio.c.

References __HAL_GPIO_EXTI_CLEAR_IT, __HAL_GPIO_EXTI_GET_IT, and HAL_GPIO_EXTI_Callback().

HAL_StatusTypeDef HAL_GPIO_LockPin	(	GPIO_TypeDef *	GPIOx,
		uint16_t	GPIO_Pin
	)

Lock 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..H) to select the GPIO peripheral for STM32L4 family
GPIO_Pin,:	specifies the port bits 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 491 of file stm32l4xx_hal_gpio.c.

References assert_param, and IS_GPIO_PIN.

GPIO_PinState HAL_GPIO_ReadPin	(	GPIO_TypeDef *	GPIOx,
		uint16_t	GPIO_Pin
	)

Read the specified input port pin.

Parameters:

GPIOx,:	where x can be (A..H) to select the GPIO peripheral for STM32L4 family
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 416 of file stm32l4xx_hal_gpio.c.

References assert_param, GPIO_PIN_RESET, GPIO_PIN_SET, and IS_GPIO_PIN.

void HAL_GPIO_TogglePin	(	GPIO_TypeDef *	GPIOx,
		uint16_t	GPIO_Pin
	)

Toggle the specified GPIO pin.

Parameters:

GPIOx,:	where x can be (A..H) to select the GPIO peripheral for STM32L4 family
GPIO_Pin,:	specifies the pin to be toggled.

Return values:

None

Definition at line 472 of file stm32l4xx_hal_gpio.c.

References assert_param, and IS_GPIO_PIN.

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

Set or clear the selected data port bit.

Note:

This function uses GPIOx_BSRR and GPIOx_BRR registers 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..H) to select the GPIO peripheral for STM32L4 family
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 450 of file stm32l4xx_hal_gpio.c.

References assert_param, GPIO_PIN_RESET, IS_GPIO_PIN, and IS_GPIO_PIN_ACTION.