stm32f1xx_hal_exti.c File Reference

EXTI HAL module driver. This file provides firmware functions to manage the following functionalities of the Extended Interrupts and events controller (EXTI) peripheral: More...

#include "stm32f1xx_hal.h"

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Detailed Description

EXTI HAL module driver. This file provides firmware functions to manage the following functionalities of the Extended Interrupts and events controller (EXTI) peripheral:

Author

MCD Application Team

• Initialization and de-initialization functions
• IO operation functions

==============================================================================
                  ##### EXTI Peripheral features #####
==============================================================================
[..]
  (+) Each Exti line can be configured within this driver.

  (+) Exti line can be configured in 3 different modes
      (++) Interrupt
      (++) Event
      (++) Both of them

  (+) Configurable Exti lines can be configured with 3 different triggers
      (++) Rising
      (++) Falling
      (++) Both of them

  (+) When set in interrupt mode, configurable Exti lines have two different
      interrupts pending registers which allow to distinguish which transition
      occurs:
      (++) Rising edge pending interrupt
      (++) Falling

  (+) Exti lines 0 to 15 are linked to gpio pin number 0 to 15. Gpio port can
      be selected through multiplexer.

                   ##### How to use this driver #####
==============================================================================
[..]

  (#) Configure the EXTI line using HAL_EXTI_SetConfigLine().
      (++) Choose the interrupt line number by setting "Line" member from
           EXTI_ConfigTypeDef structure.
      (++) Configure the interrupt and/or event mode using "Mode" member from
           EXTI_ConfigTypeDef structure.
      (++) For configurable lines, configure rising and/or falling trigger
           "Trigger" member from EXTI_ConfigTypeDef structure.
      (++) For Exti lines linked to gpio, choose gpio port using "GPIOSel"
           member from GPIO_InitTypeDef structure.

  (#) Get current Exti configuration of a dedicated line using
      HAL_EXTI_GetConfigLine().
      (++) Provide exiting handle as parameter.
      (++) Provide pointer on EXTI_ConfigTypeDef structure as second parameter.

  (#) Clear Exti configuration of a dedicated line using HAL_EXTI_GetConfigLine().
      (++) Provide exiting handle as parameter.

  (#) Register callback to treat Exti interrupts using HAL_EXTI_RegisterCallback().
      (++) Provide exiting handle as first parameter.
      (++) Provide which callback will be registered using one value from
           EXTI_CallbackIDTypeDef.
      (++) Provide callback function pointer.

  (#) Get interrupt pending bit using HAL_EXTI_GetPending().

  (#) Clear interrupt pending bit using HAL_EXTI_GetPending().

  (#) Generate software interrupt using HAL_EXTI_GenerateSWI().

Attention

© Copyright (c) 2019 STMicroelectronics. All rights reserved.

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 stm32f1xx_hal_exti.c.