213 lines
6.9 KiB
C
213 lines
6.9 KiB
C
/**
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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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* Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.Clause
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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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/* 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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/** @addtogroup STM32F4xx_LL_Driver
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* @{
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*/
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#if defined (EXTI)
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/** @defgroup EXTI_LL EXTI
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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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#define IS_LL_EXTI_LINE_0_31(__VALUE__) (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U)
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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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#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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/* Private function prototypes -----------------------------------------------*/
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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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/** @addtogroup EXTI_LL_EF_Init
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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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return SUCCESS;
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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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/* 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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/* 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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* @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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#endif /* defined (EXTI) */
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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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