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/**
******************************************************************************
* @file stm32f0xx_ll_exti.c
* @author MCD Application Team
* @brief EXTI LL module driver.
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2016 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
#if defined(USE_FULL_LL_DRIVER)
/* Includes ------------------------------------------------------------------*/
#include "stm32f0xx_ll_exti.h"
#ifdef USE_FULL_ASSERT
#include "stm32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif
/** @addtogroup STM32F0xx_LL_Driver
* @{
*/
#if defined (EXTI)
/** @defgroup EXTI_LL EXTI
* @{
*/
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/** @addtogroup EXTI_LL_Private_Macros
* @{
*/
#define IS_LL_EXTI_LINE_0_31(__VALUE__) (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U)
#define IS_LL_EXTI_MODE(__VALUE__) (((__VALUE__) == LL_EXTI_MODE_IT) \
|| ((__VALUE__) == LL_EXTI_MODE_EVENT) \
|| ((__VALUE__) == LL_EXTI_MODE_IT_EVENT))
#define IS_LL_EXTI_TRIGGER(__VALUE__) (((__VALUE__) == LL_EXTI_TRIGGER_NONE) \
|| ((__VALUE__) == LL_EXTI_TRIGGER_RISING) \
|| ((__VALUE__) == LL_EXTI_TRIGGER_FALLING) \
|| ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING))
/**
* @}
*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
/** @addtogroup EXTI_LL_Exported_Functions
* @{
*/
/** @addtogroup EXTI_LL_EF_Init
* @{
*/
/**
* @brief De-initialize the EXTI registers to their default reset values.
* @retval An ErrorStatus enumeration value:
* - SUCCESS: EXTI registers are de-initialized
* - ERROR: not applicable
*/
uint32_t LL_EXTI_DeInit(void)
{
/* Interrupt mask register set to default reset values */
#if defined(STM32F030x6) || defined(STM32F031x6) ||defined(STM32F038xx)
LL_EXTI_WriteReg(IMR, 0x0FF40000U);
#elif defined(STM32F070x6) || defined(STM32F042x6) || defined(STM32F048xx)
LL_EXTI_WriteReg(IMR, 0x7FF40000U);
#elif defined(STM32F030x8) || defined(STM32F051x8) || defined(STM32F058xx)
LL_EXTI_WriteReg(IMR, 0x0F940000U);
#else
LL_EXTI_WriteReg(IMR, 0x7F840000U);
#endif
/* Event mask register set to default reset values */
LL_EXTI_WriteReg(EMR, 0x00000000U);
/* Rising Trigger selection register set to default reset values */
LL_EXTI_WriteReg(RTSR, 0x00000000U);
/* Falling Trigger selection register set to default reset values */
LL_EXTI_WriteReg(FTSR, 0x00000000U);
/* Software interrupt event register set to default reset values */
LL_EXTI_WriteReg(SWIER, 0x00000000U);
/* Pending register clear */
LL_EXTI_WriteReg(PR, 0x007BFFFFU);
return SUCCESS;
}
/**
* @brief Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.
* @param EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.
* @retval An ErrorStatus enumeration value:
* - SUCCESS: EXTI registers are initialized
* - ERROR: not applicable
*/
uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)
{
ErrorStatus status = SUCCESS;
/* Check the parameters */
assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31));
assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));
assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));
/* ENABLE LineCommand */
if (EXTI_InitStruct->LineCommand != DISABLE)
{
assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));
/* Configure EXTI Lines in range from 0 to 31 */
if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE)
{
switch (EXTI_InitStruct->Mode)
{
case LL_EXTI_MODE_IT:
/* First Disable Event on provided Lines */
LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
/* Then Enable IT on provided Lines */
LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
break;
case LL_EXTI_MODE_EVENT:
/* First Disable IT on provided Lines */
LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
/* Then Enable Event on provided Lines */
LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
break;
case LL_EXTI_MODE_IT_EVENT:
/* Directly Enable IT & Event on provided Lines */
LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
break;
default:
status = ERROR;
break;
}
if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
{
switch (EXTI_InitStruct->Trigger)
{
case LL_EXTI_TRIGGER_RISING:
/* First Disable Falling Trigger on provided Lines */
LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
/* Then Enable Rising Trigger on provided Lines */
LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
break;
case LL_EXTI_TRIGGER_FALLING:
/* First Disable Rising Trigger on provided Lines */
LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
/* Then Enable Falling Trigger on provided Lines */
LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
break;
case LL_EXTI_TRIGGER_RISING_FALLING:
LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
break;
default:
status = ERROR;
break;
}
}
}
}
/* DISABLE LineCommand */
else
{
/* De-configure EXTI Lines in range from 0 to 31 */
LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
}
return status;
}
/**
* @brief Set each @ref LL_EXTI_InitTypeDef field to default value.
* @param EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.
* @retval None
*/
void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)
{
EXTI_InitStruct->Line_0_31 = LL_EXTI_LINE_NONE;
EXTI_InitStruct->LineCommand = DISABLE;
EXTI_InitStruct->Mode = LL_EXTI_MODE_IT;
EXTI_InitStruct->Trigger = LL_EXTI_TRIGGER_FALLING;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* defined (EXTI) */
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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