STM32F479xx HAL User Manual: stm32f4xx_hal

GPIO HAL module driver. This file provides firmware functions to manage the following functionalities of the General Purpose Input/Output (GPIO) peripheral: + Initialization and de-initialization functions + IO operation functions. More...

#include "stm32f4xx_hal.h"

Go to the source code of this file.

Defines
#define	GPIO_NUMBER 16U
Functions
void	HAL_GPIO_Init (GPIO_TypeDef GPIOx, GPIO_InitTypeDef GPIO_Init)
	Initializes the GPIOx peripheral according to the specified parameters in the GPIO_Init.
void	HAL_GPIO_DeInit (GPIO_TypeDef *GPIOx, uint32_t GPIO_Pin)
	De-initializes the GPIOx peripheral registers to their default reset values.
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.
__weak void	HAL_GPIO_EXTI_Callback (uint16_t GPIO_Pin)
	EXTI line detection callbacks.

Detailed Description

Author:

MCD Application Team

  ==============================================================================
                    ##### GPIO Peripheral features #####
  ==============================================================================
  [..] 
  Subject to the specific hardware characteristics of each I/O port listed in the datasheet, each
  port bit of the General Purpose IO (GPIO) Ports, can be individually configured by software
  in several modes:
  (+) Input mode 
  (+) Analog mode
  (+) Output mode
  (+) Alternate function mode
  (+) External interrupt/event lines

  [..]  
  During and just after reset, the alternate functions and external interrupt  
  lines are not active and the I/O ports are configured in input floating mode.
  
  [..]   
  All GPIO pins have weak internal pull-up and pull-down resistors, which can be 
  activated or not.

  [..]
  In Output or Alternate mode, each IO can be configured on open-drain or push-pull
  type and the IO speed can be selected depending on the VDD value.

  [..]  
  All ports have external interrupt/event capability. To use external interrupt 
  lines, the port must be configured in input mode. All available GPIO pins are 
  connected to the 16 external interrupt/event lines from EXTI0 to EXTI15.
  
  [..]
  The external interrupt/event controller consists of up to 23 edge detectors 
  (16 lines are connected to GPIO) for generating event/interrupt requests (each 
  input line can be independently configured to select the type (interrupt or event) 
  and the corresponding trigger event (rising or falling or both). Each line can 
  also be masked independently. 

                     ##### How to use this driver #####
  ==============================================================================  
  [..]
    (#) Enable the GPIO AHB clock using the following function: __HAL_RCC_GPIOx_CLK_ENABLE(). 

    (#) Configure the GPIO pin(s) using HAL_GPIO_Init().
        (++) Configure the IO mode using "Mode" member from GPIO_InitTypeDef structure
        (++) Activate Pull-up, Pull-down resistor using "Pull" member from GPIO_InitTypeDef 
             structure.
        (++) In case of Output or alternate function mode selection: the speed is 
             configured through "Speed" member from GPIO_InitTypeDef structure.
        (++) In alternate mode is selection, the alternate function connected to the IO
             is configured through "Alternate" member from GPIO_InitTypeDef structure.
        (++) Analog mode is required when a pin is to be used as ADC channel 
             or DAC output.
        (++) In case of external interrupt/event selection the "Mode" member from 
             GPIO_InitTypeDef structure select the type (interrupt or event) and 
             the corresponding trigger event (rising or falling or both).

    (#) In case of external interrupt/event mode selection, configure NVIC IRQ priority 
        mapped to the EXTI line using HAL_NVIC_SetPriority() and enable it using
        HAL_NVIC_EnableIRQ().
         
    (#) To get the level of a pin configured in input mode use HAL_GPIO_ReadPin().
            
    (#) To set/reset the level of a pin configured in output mode use 
        HAL_GPIO_WritePin()/HAL_GPIO_TogglePin().
    
    (#) To lock pin configuration until next reset use HAL_GPIO_LockPin().

                 
    (#) During and just after reset, the alternate functions are not 
        active and the GPIO pins are configured in input floating mode (except JTAG
        pins).
  
    (#) The LSE oscillator pins OSC32_IN and OSC32_OUT can be used as general purpose 
        (PC14 and PC15, respectively) when the LSE oscillator is off. The LSE has 
        priority over the GPIO function.
  
    (#) The HSE oscillator pins OSC_IN/OSC_OUT can be used as 
        general purpose PH0 and PH1, respectively, when the HSE oscillator is off. 
        The HSE has priority over the GPIO function.

Attention:

This software component is licensed by ST under BSD 3-Clause license, the "License"; You may not use this file except in compliance with the License. You may obtain a copy of the License at: opensource.org/licenses/BSD-3-Clause

Definition in file stm32f4xx_hal_gpio.c.

Defines

Functions

Detailed Description

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