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IO operation functions
Functions

IO operation functions
[GPIO Exported Functions]

GPIO Read and Write. More...

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 pin.
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.
__weak void HAL_GPIO_EXTI_Callback (uint16_t GPIO_Pin)
 EXTI line detection callback.

Detailed Description

GPIO Read and Write. 

 ===============================================================================
                       ##### IO operation functions #####
 ===============================================================================
  [..]
    This subsection provides a set of functions allowing to manage the GPIOs.

Function Documentation

__weak void HAL_GPIO_EXTI_Callback ( uint16_t  GPIO_Pin )

EXTI line detection callback.

Parameters:
GPIO_Pin,:Specifies the pins connected EXTI line
Return values:
None

Definition at line 570 of file stm32f1xx_hal_gpio.c.

void HAL_GPIO_EXTI_IRQHandler ( uint16_t  GPIO_Pin )

This function handles EXTI interrupt request.

Parameters:
GPIO_Pin,:Specifies the pins connected EXTI line
Return values:
None

Definition at line 555 of file stm32f1xx_hal_gpio.c.

HAL_StatusTypeDef HAL_GPIO_LockPin ( GPIO_TypeDef *  GPIOx,
uint16_t  GPIO_Pin 
)

Locks GPIO Pins configuration registers.

Note:
The locking mechanism allows the IO configuration to be frozen. When the LOCK sequence has been applied on a port bit, it is no longer possible to modify the value of the port bit until the next reset.
Parameters:
GPIOx,:where x can be (A..G depending on device used) to select the GPIO peripheral
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 521 of file stm32f1xx_hal_gpio.c.

GPIO_PinState HAL_GPIO_ReadPin ( GPIO_TypeDef *  GPIOx,
uint16_t  GPIO_Pin 
)

Reads the specified input port pin.

Parameters:
GPIOx,:where x can be (A..G depending on device used) to select the GPIO peripheral
GPIO_Pin,:specifies the port bit to read. This parameter can be GPIO_PIN_x where x can be (0..15).
Return values:
Theinput port pin value.

Definition at line 447 of file stm32f1xx_hal_gpio.c.

void HAL_GPIO_TogglePin ( GPIO_TypeDef *  GPIOx,
uint16_t  GPIO_Pin 
)

Toggles the specified GPIO pin.

Parameters:
GPIOx,:where x can be (A..G depending on device used) to select the GPIO peripheral
GPIO_Pin,:Specifies the pins to be toggled.
Return values:
None

Definition at line 503 of file stm32f1xx_hal_gpio.c.

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

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..G depending on device used) to select the GPIO peripheral
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_BIT_RESET: to clear the port pin
  • GPIO_BIT_SET: to set the port pin
Return values:
None

Definition at line 481 of file stm32f1xx_hal_gpio.c.

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