/** ****************************************************************************** * @file stm32l4xx_ll_exti.c * @author MCD Application Team * @brief EXTI LL module driver. ****************************************************************************** * @attention * *

© COPYRIGHT(c) 2017 STMicroelectronics

* * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of STMicroelectronics nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************** */ #if defined(USE_FULL_LL_DRIVER) /* Includes ------------------------------------------------------------------*/ #include "stm32l4xx_ll_exti.h" #ifdef USE_FULL_ASSERT #include "stm32_assert.h" #else #define assert_param(expr) ((void)0U) #endif /** @addtogroup STM32L4xx_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_LINE_32_63(__VALUE__) (((__VALUE__) & ~LL_EXTI_LINE_ALL_32_63) == 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 */ LL_EXTI_WriteReg(IMR1, 0xFF820000U); /* Event mask register set to default reset values */ LL_EXTI_WriteReg(EMR1, 0x00000000U); /* Rising Trigger selection register set to default reset values */ LL_EXTI_WriteReg(RTSR1, 0x00000000U); /* Falling Trigger selection register set to default reset values */ LL_EXTI_WriteReg(FTSR1, 0x00000000U); /* Software interrupt event register set to default reset values */ LL_EXTI_WriteReg(SWIER1, 0x00000000U); /* Pending register clear */ LL_EXTI_WriteReg(PR1, 0x007DFFFFU); /* Interrupt mask register 2 set to default reset values */ #if defined(LL_EXTI_LINE_40) LL_EXTI_WriteReg(IMR2, 0x00000187U); #else LL_EXTI_WriteReg(IMR2, 0x00000087U); #endif /* Event mask register 2 set to default reset values */ LL_EXTI_WriteReg(EMR2, 0x00000000U); /* Rising Trigger selection register 2 set to default reset values */ LL_EXTI_WriteReg(RTSR2, 0x00000000U); /* Falling Trigger selection register 2 set to default reset values */ LL_EXTI_WriteReg(FTSR2, 0x00000000U); /* Software interrupt event register 2 set to default reset values */ LL_EXTI_WriteReg(SWIER2, 0x00000000U); /* Pending register 2 clear */ LL_EXTI_WriteReg(PR2, 0x00000078U); 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_LL_EXTI_LINE_32_63(EXTI_InitStruct->Line_32_63)); 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; } } } /* Configure EXTI Lines in range from 32 to 63 */ if (EXTI_InitStruct->Line_32_63 != LL_EXTI_LINE_NONE) { switch (EXTI_InitStruct->Mode) { case LL_EXTI_MODE_IT: /* First Disable Event on provided Lines */ LL_EXTI_DisableEvent_32_63(EXTI_InitStruct->Line_32_63); /* Then Enable IT on provided Lines */ LL_EXTI_EnableIT_32_63(EXTI_InitStruct->Line_32_63); break; case LL_EXTI_MODE_EVENT: /* First Disable IT on provided Lines */ LL_EXTI_DisableIT_32_63(EXTI_InitStruct->Line_32_63); /* Then Enable Event on provided Lines */ LL_EXTI_EnableEvent_32_63(EXTI_InitStruct->Line_32_63); break; case LL_EXTI_MODE_IT_EVENT: /* Directly Enable IT & Event on provided Lines */ LL_EXTI_EnableIT_32_63(EXTI_InitStruct->Line_32_63); LL_EXTI_EnableEvent_32_63(EXTI_InitStruct->Line_32_63); 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_32_63(EXTI_InitStruct->Line_32_63); /* Then Enable IT on provided Lines */ LL_EXTI_EnableRisingTrig_32_63(EXTI_InitStruct->Line_32_63); break; case LL_EXTI_TRIGGER_FALLING: /* First Disable Rising Trigger on provided Lines */ LL_EXTI_DisableRisingTrig_32_63(EXTI_InitStruct->Line_32_63); /* Then Enable Falling Trigger on provided Lines */ LL_EXTI_EnableFallingTrig_32_63(EXTI_InitStruct->Line_32_63); break; case LL_EXTI_TRIGGER_RISING_FALLING: LL_EXTI_EnableRisingTrig_32_63(EXTI_InitStruct->Line_32_63); LL_EXTI_EnableFallingTrig_32_63(EXTI_InitStruct->Line_32_63); 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); /* De-configure EXTI Lines in range from 32 to 63 */ LL_EXTI_DisableIT_32_63(EXTI_InitStruct->Line_32_63); LL_EXTI_DisableEvent_32_63(EXTI_InitStruct->Line_32_63); } 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->Line_32_63 = 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****/