stm32f30x_exti.c File Reference

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

#include "stm32f30x_exti.h"

Include dependency graph for stm32f30x_exti.c:

Go to the source code of this file.

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

Functions
void	EXTI_ClearFlag (uint32_t EXTI_Line)
	Clears the EXTI's line pending flags. More...
void	EXTI_ClearITPendingBit (uint32_t EXTI_Line)
	Clears the EXTI's line pending bits. More...
void	EXTI_DeInit (void)
	Deinitializes the EXTI peripheral registers to their default reset values. 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...
ITStatus	EXTI_GetITStatus (uint32_t EXTI_Line)
	Checks whether the specified EXTI line is asserted or not. 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...

Detailed Description

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

Author

MCD Application Team

Version

V1.1.1

Date

04-April-2014

• 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 USB Device wakeup event  
        (#) EXTI line 19 is connected to the RTC Tamper and TimeStamp events
        (#) EXTI line 20 is connected to the RTC wakeup event  
        (#) EXTI line 21 is connected to the Comparator 1 wakeup event 
        (#) EXTI line 22 is connected to the Comparator 2 wakeup event
        (#) EXTI line 23 is connected to the I2C1 wakeup event
        (#) EXTI line 24 is connected to the I2C2 wakeup event  
        (#) EXTI line 25 is connected to the USART1 wakeup event
        (#) EXTI line 26 is connected to the USART2 wakeup event  
        (#) EXTI line 27 is reserved
        (#) EXTI line 28 is connected to the USART3 wakeup event
        (#) EXTI line 29 is connected to the Comparator 3 event
        (#) EXTI line 30 is connected to the Comparator 4 event
        (#) EXTI line 31 is connected to the Comparator 5 event
        (#) EXTI line 32 is connected to the Comparator 6 event
        (#) EXTI line 33 is connected to the Comparator 7 event
        (#) EXTI line 34 is connected for thr UART4 wakeup event
        (#) EXTI line 35 is connected for the UART5 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(). For the 
            internal interrupt, the trigger selection is not needed 
            (the active edge is always the rising one).
        (#) Configure NVIC IRQ channel mapped to the EXTI line using NVIC_Init().
        (#) Optionally, you can generate a software interrupt using the function 
            EXTI_GenerateSWInterrupt().
   [..]
   (@) SYSCFG APB clock must be enabled to get write access to SYSCFG_EXTICRx
     registers using RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);

Attention

© COPYRIGHT 2014 STMicroelectronics

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 stm32f30x_exti.c.