| /** |
| ****************************************************************************** |
| * @file stm32g4xx_ll_exti.c |
| * @author MCD Application Team |
| * @brief EXTI LL module driver. |
| ****************************************************************************** |
| * @attention |
| * |
| * <h2><center>© Copyright (c) 2019 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 "stm32g4xx_ll_exti.h" |
| #ifdef USE_FULL_ASSERT |
| #include "stm32_assert.h" |
| #else |
| #define assert_param(expr) ((void)0U) |
| #endif /* USE_FULL_ASSERT */ |
| |
| /** @addtogroup STM32G4xx_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: |
| * - 0x00: EXTI registers are de-initialized |
| */ |
| uint32_t LL_EXTI_DeInit(void) |
| { |
| /* Interrupt mask register set to default reset values */ |
| LL_EXTI_WriteReg(IMR1, 0x1F840000U); |
| /* 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_32) && defined(LL_EXTI_LINE_33) && defined(LL_EXTI_LINE_35) && defined(LL_EXTI_LINE_42) |
| LL_EXTI_WriteReg(IMR2, 0x0000043CU); |
| #else |
| LL_EXTI_WriteReg(IMR2, 0x00000034U); |
| #endif /* LL_EXTI_LINE_xx */ |
| /* 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 0x00u; |
| } |
| |
| /** |
| * @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: |
| * - 0x00: EXTI registers are initialized |
| * - any other calue : wrong configuration |
| */ |
| uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct) |
| { |
| uint32_t status = 0x00u; |
| |
| /* 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 on provided Lines */ |
| LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31); |
| /* Directly Enable Event on provided Lines */ |
| LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31); |
| break; |
| default: |
| status = 0x01u; |
| 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: |
| /* Enable Rising Trigger on provided Lines */ |
| LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31); |
| /* Enable Falling Trigger on provided Lines */ |
| LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31); |
| break; |
| default: |
| status |= 0x02u; |
| 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 on provided Lines */ |
| LL_EXTI_EnableIT_32_63(EXTI_InitStruct->Line_32_63); |
| /* Directly Enable IT on provided Lines */ |
| LL_EXTI_EnableEvent_32_63(EXTI_InitStruct->Line_32_63); |
| break; |
| default: |
| status |= 0x04u; |
| 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: |
| /* Enable Rising Trigger on provided Lines */ |
| LL_EXTI_EnableRisingTrig_32_63(EXTI_InitStruct->Line_32_63); |
| /* Enable Falling Trigger on provided Lines */ |
| LL_EXTI_EnableFallingTrig_32_63(EXTI_InitStruct->Line_32_63); |
| break; |
| default: |
| status |= 0x05u; |
| break; |
| } |
| } |
| } |
| } |
| /* DISABLE LineCommand */ |
| else |
| { |
| /* De-configure IT EXTI Lines in range from 0 to 31 */ |
| LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31); |
| /* De-configure Event EXTI Lines in range from 0 to 31 */ |
| LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31); |
| /* De-configure IT EXTI Lines in range from 32 to 63 */ |
| LL_EXTI_DisableIT_32_63(EXTI_InitStruct->Line_32_63); |
| /* De-configure Event EXTI Lines in range from 32 to 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****/ |
