text: /**
    ******************************************************************************
    * @file    stm32f4xx_exti.h
    * @author  MCD Application Team
    * @version V1.0.0
    * @date    30-September-2011
    * @brief   This file contains all the functions prototypes for the EXTI firmware
    *          library.
    ******************************************************************************
    * @attention
    *
    * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
    * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
    * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
    * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
    * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
    * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
    *
    * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
    ******************************************************************************
    */
  
  /* Define to prevent recursive inclusion -------------------------------------*/
  #ifndef __STM32F4xx_EXTI_H
  #define __STM32F4xx_EXTI_H
  
  #ifdef __cplusplus
   extern "C" {
  #endif
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32f4xx.h"
  
  /** @addtogroup STM32F4xx_StdPeriph_Driver
    * @{
    */
  
  /** @addtogroup EXTI
    * @{
    */
  
  /* Exported types ------------------------------------------------------------*/
  
  /** 
    * @brief  EXTI mode enumeration  
    */
  
  typedef enum
  {
    EXTI_Mode_Interrupt = 0x00,
    EXTI_Mode_Event = 0x04
  }EXTIMode_TypeDef;
  
  #define IS_EXTI_MODE(MODE) (((MODE) == EXTI_Mode_Interrupt) || ((MODE) == EXTI_Mode_Event))
  
  /** 
    * @brief  EXTI Trigger enumeration  
    */
  
  typedef enum
  {
    EXTI_Trigger_Rising = 0x08,
    EXTI_Trigger_Falling = 0x0C,  
    EXTI_Trigger_Rising_Falling = 0x10
  }EXTITrigger_TypeDef;
  
  #define IS_EXTI_TRIGGER(TRIGGER) (((TRIGGER) == EXTI_Trigger_Rising) || \
                                    ((TRIGGER) == EXTI_Trigger_Falling) || \
                                    ((TRIGGER) == EXTI_Trigger_Rising_Falling))
  /** 
    * @brief  EXTI Init Structure definition  
    */
  
  typedef struct
  {
    uint32_t EXTI_Line;               /*!< Specifies the EXTI lines to be enabled or disabled.
                                           This parameter can be any combination value of @ref EXTI_Lines */
     
    EXTIMode_TypeDef EXTI_Mode;       /*!< Specifies the mode for the EXTI lines.
                                           This parameter can be a value of @ref EXTIMode_TypeDef */
  
    EXTITrigger_TypeDef EXTI_Trigger; /*!< Specifies the trigger signal active edge for the EXTI lines.
                                           This parameter can be a value of @ref EXTITrigger_TypeDef */
  
    FunctionalState EXTI_LineCmd;     /*!< Specifies the new state of the selected EXTI lines.
                                           This parameter can be set either to ENABLE or DISABLE */ 
  }EXTI_InitTypeDef;
  
  /* Exported constants --------------------------------------------------------*/
  
  /** @defgroup EXTI_Exported_Constants
    * @{
    */
  
  /** @defgroup EXTI_Lines 
    * @{
    */
  
  #define EXTI_Line0       ((uint32_t)0x00001)     /*!< External interrupt line 0 */
  #define EXTI_Line1       ((uint32_t)0x00002)     /*!< External interrupt line 1 */
  #define EXTI_Line2       ((uint32_t)0x00004)     /*!< External interrupt line 2 */
  #define EXTI_Line3       ((uint32_t)0x00008)     /*!< External interrupt line 3 */
  #define EXTI_Line4       ((uint32_t)0x00010)     /*!< External interrupt line 4 */
  #define EXTI_Line5       ((uint32_t)0x00020)     /*!< External interrupt line 5 */
  #define EXTI_Line6       ((uint32_t)0x00040)     /*!< External interrupt line 6 */
  #define EXTI_Line7       ((uint32_t)0x00080)     /*!< External interrupt line 7 */
  #define EXTI_Line8       ((uint32_t)0x00100)     /*!< External interrupt line 8 */
  #define EXTI_Line9       ((uint32_t)0x00200)     /*!< External interrupt line 9 */
  #define EXTI_Line10      ((uint32_t)0x00400)     /*!< External interrupt line 10 */
  #define EXTI_Line11      ((uint32_t)0x00800)     /*!< External interrupt line 11 */
  #define EXTI_Line12      ((uint32_t)0x01000)     /*!< External interrupt line 12 */
  #define EXTI_Line13      ((uint32_t)0x02000)     /*!< External interrupt line 13 */
  #define EXTI_Line14      ((uint32_t)0x04000)     /*!< External interrupt line 14 */
  #define EXTI_Line15      ((uint32_t)0x08000)     /*!< External interrupt line 15 */
  #define EXTI_Line16      ((uint32_t)0x10000)     /*!< External interrupt line 16 Connected to the PVD Output */
  #define EXTI_Line17      ((uint32_t)0x20000)     /*!< External interrupt line 17 Connected to the RTC Alarm event */
  #define EXTI_Line18      ((uint32_t)0x40000)     /*!< External interrupt line 18 Connected to the USB OTG FS Wakeup from suspend event */                                    
  #define EXTI_Line19      ((uint32_t)0x80000)     /*!< External interrupt line 19 Connected to the Ethernet Wakeup event */
  #define EXTI_Line20      ((uint32_t)0x00100000)  /*!< External interrupt line 20 Connected to the USB OTG HS (configured in FS) Wakeup event  */
  #define EXTI_Line21      ((uint32_t)0x00200000)  /*!< External interrupt line 21 Connected to the RTC Tamper and Time Stamp events */                                               
  #define EXTI_Line22      ((uint32_t)0x00400000)  /*!< External interrupt line 22 Connected to the RTC Wakeup event */                                               
                                            
  #define IS_EXTI_LINE(LINE) ((((LINE) & (uint32_t)0xFF800000) == 0x00) && ((LINE) != (uint16_t)0x00))
  
  #define IS_GET_EXTI_LINE(LINE) (((LINE) == EXTI_Line0) || ((LINE) == EXTI_Line1) || \
                                  ((LINE) == EXTI_Line2) || ((LINE) == EXTI_Line3) || \
                                  ((LINE) == EXTI_Line4) || ((LINE) == EXTI_Line5) || \
                                  ((LINE) == EXTI_Line6) || ((LINE) == EXTI_Line7) || \
                                  ((LINE) == EXTI_Line8) || ((LINE) == EXTI_Line9) || \
                                  ((LINE) == EXTI_Line10) || ((LINE) == EXTI_Line11) || \
                                  ((LINE) == EXTI_Line12) || ((LINE) == EXTI_Line13) || \
                                  ((LINE) == EXTI_Line14) || ((LINE) == EXTI_Line15) || \
                                  ((LINE) == EXTI_Line16) || ((LINE) == EXTI_Line17) || \
                                  ((LINE) == EXTI_Line18) || ((LINE) == EXTI_Line19) || \
                                  ((LINE) == EXTI_Line20) || ((LINE) == EXTI_Line21) ||\
                                  ((LINE) == EXTI_Line22))
                      
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /* Exported macro ------------------------------------------------------------*/
  /* Exported functions --------------------------------------------------------*/
  
  /*  Function used to set the EXTI configuration to the default reset state *****/
  void EXTI_DeInit(void);
  
  /* Initialization and Configuration functions *********************************/
  void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct);
  void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct);
  void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line);
  
  /* Interrupts and flags management functions **********************************/
  FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line);
  void EXTI_ClearFlag(uint32_t EXTI_Line);
  ITStatus EXTI_GetITStatus(uint32_t EXTI_Line);
  void EXTI_ClearITPendingBit(uint32_t EXTI_Line);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* __STM32F4xx_EXTI_H */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
  