/**
  ******************************************************************************
  * @file    stm32l1xx_exti.h
  * @author  MCD Application Team
  * @version V1.2.0
  * @date    22-February-2013
  * @brief   This file contains all the functions prototypes for the EXTI firmware
  *          library.
  ******************************************************************************
  * @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.
  *
  ******************************************************************************
  */

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM32L1xx_EXTI_H
#define __STM32L1xx_EXTI_H

#ifdef __cplusplus
 extern "C" {
#endif

/* Includes ------------------------------------------------------------------*/
#include "stm32l1xx.h"

/** @addtogroup STM32L1xx_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 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)0x00000001)  /*!< External interrupt line 0 */
#define EXTI_Line1       ((uint32_t)0x00000002)  /*!< External interrupt line 1 */
#define EXTI_Line2       ((uint32_t)0x00000004)  /*!< External interrupt line 2 */
#define EXTI_Line3       ((uint32_t)0x00000008)  /*!< External interrupt line 3 */
#define EXTI_Line4       ((uint32_t)0x00000010)  /*!< External interrupt line 4 */
#define EXTI_Line5       ((uint32_t)0x00000020)  /*!< External interrupt line 5 */
#define EXTI_Line6       ((uint32_t)0x00000040)  /*!< External interrupt line 6 */
#define EXTI_Line7       ((uint32_t)0x00000080)  /*!< External interrupt line 7 */
#define EXTI_Line8       ((uint32_t)0x00000100)  /*!< External interrupt line 8 */
#define EXTI_Line9       ((uint32_t)0x00000200)  /*!< External interrupt line 9 */
#define EXTI_Line10      ((uint32_t)0x00000400)  /*!< External interrupt line 10 */
#define EXTI_Line11      ((uint32_t)0x00000800)  /*!< External interrupt line 11 */
#define EXTI_Line12      ((uint32_t)0x00001000)  /*!< External interrupt line 12 */
#define EXTI_Line13      ((uint32_t)0x00002000)  /*!< External interrupt line 13 */
#define EXTI_Line14      ((uint32_t)0x00004000)  /*!< External interrupt line 14 */
#define EXTI_Line15      ((uint32_t)0x00008000)  /*!< External interrupt line 15 */
#define EXTI_Line16      ((uint32_t)0x00010000)  /*!< External interrupt line 16 
                                                      Connected to the PVD Output */
#define EXTI_Line17      ((uint32_t)0x00020000)  /*!< External interrupt line 17 
                                                      Connected to the RTC Alarm 
                                                      event */
#define EXTI_Line18      ((uint32_t)0x00040000)  /*!< External interrupt line 18 
                                                      Connected to the USB Device 
                                                      FS Wakeup from suspend event */
#define EXTI_Line19      ((uint32_t)0x00080000)  /*!< External interrupt line 19 
                                                      Connected to the RTC Tamper 
                                                      and Time Stamp events */ 
#define EXTI_Line20      ((uint32_t)0x00100000)  /*!< External interrupt line 20 
                                                      Connected to the RTC Wakeup 
                                                      event */
#define EXTI_Line21      ((uint32_t)0x00200000)  /*!< External interrupt line 21 
                                                      Connected to the Comparator 1 
                                                      event */

#define EXTI_Line22      ((uint32_t)0x00400000)  /*!< External interrupt line 22 
                                                      Connected to the Comparator 2
                                                      event */

#define EXTI_Line23      ((uint32_t)0x00800000)  /*!< External interrupt line 23 
                                                      Comparator channel acquisition event */

#define IS_EXTI_LINE(LINE) ((((LINE) & (uint32_t)0xFF000000) == 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) || ((LINE) == EXTI_Line23))

/**
  * @}
  */

/**
  * @}
  */

/* 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 /* __STM32L1xx_EXTI_H */

/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/