/**+
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  ******************************************************************************+
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  * @file    stm32f4xx_ll_exti.c+
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  * @author  MCD Application Team+
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  * @brief   EXTI LL module driver.+
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  ******************************************************************************+
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  * @attention+
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  *+
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  * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>+
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  *+
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  * Redistribution and use in source and binary forms, with or without modification,+
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  * are permitted provided that the following conditions are met:+
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  *   1. Redistributions of source code must retain the above copyright notice,+
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  *      this list of conditions and the following disclaimer.+
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  *   2. Redistributions in binary form must reproduce the above copyright notice,+
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  *      this list of conditions and the following disclaimer in the documentation+
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  *      and/or other materials provided with the distribution.+
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  *   3. Neither the name of STMicroelectronics nor the names of its contributors+
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  *      may be used to endorse or promote products derived from this software+
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  *      without specific prior written permission.+
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  *+
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  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"+
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  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE+
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  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE+
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  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE+
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  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL+
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  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR+
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  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER+
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  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,+
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  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE+
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  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.+
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  *+
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  ******************************************************************************+
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  */+
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#if defined(USE_FULL_LL_DRIVER)+
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+
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/* Includes ------------------------------------------------------------------*/+
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#include "stm32f4xx_ll_exti.h"+
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#ifdef  USE_FULL_ASSERT+
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#include "stm32_assert.h"+
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#else+
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#define assert_param(expr) ((void)0U)+
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#endif+
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+
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/** @addtogroup STM32F4xx_LL_Driver+
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  * @{+
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  */+
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+
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#if defined (EXTI)+
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+
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/** @defgroup EXTI_LL EXTI+
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  * @{+
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  */+
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+
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/* Private types -------------------------------------------------------------*/+
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/* Private variables ---------------------------------------------------------*/+
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/* Private constants ---------------------------------------------------------*/+
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/* Private macros ------------------------------------------------------------*/+
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/** @addtogroup EXTI_LL_Private_Macros+
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  * @{+
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  */+
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+
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#define IS_LL_EXTI_LINE_0_31(__VALUE__)              (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U)+
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+
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#define IS_LL_EXTI_MODE(__VALUE__)                   (((__VALUE__) == LL_EXTI_MODE_IT)            \+
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                                                   || ((__VALUE__) == LL_EXTI_MODE_EVENT)         \+
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                                                   || ((__VALUE__) == LL_EXTI_MODE_IT_EVENT))+
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+
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+
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#define IS_LL_EXTI_TRIGGER(__VALUE__)                (((__VALUE__) == LL_EXTI_TRIGGER_NONE)       \+
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                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_RISING)     \+
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                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING)    \+
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                                                   || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING))+
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+
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/**+
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  * @}+
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  */+
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+
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/* Private function prototypes -----------------------------------------------*/+
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+
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/* Exported functions --------------------------------------------------------*/+
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/** @addtogroup EXTI_LL_Exported_Functions+
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  * @{+
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  */+
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+
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/** @addtogroup EXTI_LL_EF_Init+
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  * @{+
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  */+
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+
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/**+
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  * @brief  De-initialize the EXTI registers to their default reset values.+
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  * @retval An ErrorStatus enumeration value:+
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  *          - SUCCESS: EXTI registers are de-initialized+
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  *          - ERROR: not applicable+
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  */+
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uint32_t LL_EXTI_DeInit(void)+
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{+
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  /* Interrupt mask register set to default reset values */+
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  LL_EXTI_WriteReg(IMR,   0x00000000U);+
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  /* Event mask register set to default reset values */+
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  LL_EXTI_WriteReg(EMR,   0x00000000U);+
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  /* Rising Trigger selection register set to default reset values */+
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  LL_EXTI_WriteReg(RTSR,  0x00000000U);+
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  /* Falling Trigger selection register set to default reset values */+
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  LL_EXTI_WriteReg(FTSR,  0x00000000U);+
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  /* Software interrupt event register set to default reset values */+
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  LL_EXTI_WriteReg(SWIER, 0x00000000U);+
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  /* Pending register set to default reset values */+
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  LL_EXTI_WriteReg(PR,    0x00FFFFFFU);+
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+
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  return SUCCESS;+
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}+
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+
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/**+
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  * @brief  Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.+
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  * @param  EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.+
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  * @retval An ErrorStatus enumeration value:+
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  *          - SUCCESS: EXTI registers are initialized+
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  *          - ERROR: not applicable+
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  */+
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uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)+
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{+
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  ErrorStatus status = SUCCESS;+
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  /* Check the parameters */+
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  assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31));+
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  assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));+
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  assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));+
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+
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  /* ENABLE LineCommand */+
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  if (EXTI_InitStruct->LineCommand != DISABLE)+
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  {+
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    assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));+
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+
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    /* Configure EXTI Lines in range from 0 to 31 */+
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    if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE)+
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    {+
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      switch (EXTI_InitStruct->Mode)+
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      {+
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        case LL_EXTI_MODE_IT:+
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          /* First Disable Event on provided Lines */+
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          LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);+
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          /* Then Enable IT on provided Lines */+
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          LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);+
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          break;+
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        case LL_EXTI_MODE_EVENT:+
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          /* First Disable IT on provided Lines */+
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          LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);+
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          /* Then Enable Event on provided Lines */+
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          LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);+
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          break;+
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        case LL_EXTI_MODE_IT_EVENT:+
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          /* Directly Enable IT & Event on provided Lines */+
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          LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);+
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          LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);+
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          break;+
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        default:+
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          status = ERROR;+
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          break;+
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      }+
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      if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)+
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      {+
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        switch (EXTI_InitStruct->Trigger)+
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        {+
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          case LL_EXTI_TRIGGER_RISING:+
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            /* First Disable Falling Trigger on provided Lines */+
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            LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);+
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            /* Then Enable Rising Trigger on provided Lines */+
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            LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);+
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            break;+
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          case LL_EXTI_TRIGGER_FALLING:+
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            /* First Disable Rising Trigger on provided Lines */+
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            LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);+
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            /* Then Enable Falling Trigger on provided Lines */+
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            LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);+
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            break;+
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          case LL_EXTI_TRIGGER_RISING_FALLING:+
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            LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);+
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            LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);+
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            break;+
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          default:+
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            status = ERROR;+
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            break;+
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        }+
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      }+
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    }+
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  }+
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  /* DISABLE LineCommand */+
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  else+
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  {+
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    /* De-configure EXTI Lines in range from 0 to 31 */+
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    LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);+
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    LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);+
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  }+
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  return status;+
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}+
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+
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/**+
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  * @brief  Set each @ref LL_EXTI_InitTypeDef field to default value.+
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  * @param  EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.+
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  * @retval None+
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  */+
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void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)+
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{+
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  EXTI_InitStruct->Line_0_31      = LL_EXTI_LINE_NONE;+
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  EXTI_InitStruct->LineCommand    = DISABLE;+
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  EXTI_InitStruct->Mode           = LL_EXTI_MODE_IT;+
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  EXTI_InitStruct->Trigger        = LL_EXTI_TRIGGER_FALLING;+
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}+
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+
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/**+
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  * @}+
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  */+
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+
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/**+
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  * @}+
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  */+
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+
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/**+
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  * @}+
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  */+
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+
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#endif /* defined (EXTI) */+
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+
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/**+
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  * @}+
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  */+
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+
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#endif /* USE_FULL_LL_DRIVER */+
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+
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/+
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