This file provides firmware functions to manage the following functionalities of the EXTI peripheral: More...

#include "stm32f4xx_exti.h"

Include dependency graph for stm32f4xx_exti.c:

Macros
#define	EXTI_LINENONE ((uint32_t)0x00000) /* No interrupt selected */

Functions
void	EXTI_DeInit (void)
	Deinitializes the EXTI peripheral registers to their default reset values. More...

void	EXTI_Init (EXTI_InitTypeDef *EXTI_InitStruct)
	Initializes the EXTI peripheral according to the specified parameters in the EXTI_InitStruct. More...

void	EXTI_StructInit (EXTI_InitTypeDef *EXTI_InitStruct)
	Fills each EXTI_InitStruct member with its reset value. More...

void	EXTI_GenerateSWInterrupt (uint32_t EXTI_Line)
	Generates a Software interrupt on selected EXTI line. More...

FlagStatus	EXTI_GetFlagStatus (uint32_t EXTI_Line)
	Checks whether the specified EXTI line flag is set or not. More...

void	EXTI_ClearFlag (uint32_t EXTI_Line)
	Clears the EXTI's line pending flags. More...

ITStatus	EXTI_GetITStatus (uint32_t EXTI_Line)
	Checks whether the specified EXTI line is asserted or not. More...

void	EXTI_ClearITPendingBit (uint32_t EXTI_Line)
	Clears the EXTI's line pending bits. More...

Detailed Description

This file provides firmware functions to manage the following functionalities of the EXTI peripheral:

Author: MCD Application Team

Version: V1.3.0

Date

08-November-2013

Initialization and Configuration
Interrupts and flags management

 ===================================================================
                       ##### EXTI features #####
 ===================================================================

 [..] External interrupt/event lines are mapped as following:
   (#) All available GPIO pins are connected to the 16 external 
       interrupt/event lines from EXTI0 to EXTI15.
   (#) EXTI line 16 is connected to the PVD Output
   (#) EXTI line 17 is connected to the RTC Alarm event
   (#) EXTI line 18 is connected to the USB OTG FS Wakeup from suspend event                                    
   (#) EXTI line 19 is connected to the Ethernet Wakeup event
   (#) EXTI line 20 is connected to the USB OTG HS (configured in FS) Wakeup event 
   (#) EXTI line 21 is connected to the RTC Tamper and Time Stamp events                                               
   (#) EXTI line 22 is connected to the RTC Wakeup event
          
          
                ##### How to use this driver #####
 ===================================================================  
 
 [..] In order to use an I/O pin as an external interrupt source, follow steps 
      below:
   (#) Configure the I/O in input mode using GPIO_Init()
   (#) Select the input source pin for the EXTI line using SYSCFG_EXTILineConfig()
   (#) Select the mode(interrupt, event) and configure the trigger 
       selection (Rising, falling or both) using EXTI_Init()
   (#) Configure NVIC IRQ channel mapped to the EXTI line using NVIC_Init()

 [..]     
   (@) SYSCFG APB clock must be enabled to get write access to SYSCFG_EXTICRx
       registers using RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);

@attention

<h2><center>&copy; COPYRIGHT 2013 STMicroelectronics</center></h2>

Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
You may not use this file except in compliance with the License.
You may obtain a copy of the License at:

       http://www.st.com/software_license_agreement_liberty_v2

Unless required by applicable law or agreed to in writing, software 
distributed under the License is distributed on an "AS IS" BASIS, 
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Definition in file stm32f4xx_exti.c.

Macros

Functions

Detailed Description