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| Rev | Author | Line No. | Line |
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| 56 | mjames | 1 | /** |
| 2 | ****************************************************************************** |
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| 3 | * @file stm32l1xx_ll_exti.c |
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| 4 | * @author MCD Application Team |
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| 5 | * @brief EXTI LL module driver. |
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| 6 | ****************************************************************************** |
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| 7 | * @attention |
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| 8 | * |
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| 9 | * <h2><center>© Copyright (c) 2017 STMicroelectronics. |
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| 10 | * All rights reserved.</center></h2> |
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| 11 | * |
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| 12 | * This software component is licensed by ST under BSD 3-Clause license, |
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| 13 | * the "License"; You may not use this file except in compliance with the |
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| 14 | * License. You may obtain a copy of the License at: |
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| 15 | * opensource.org/licenses/BSD-3-Clause |
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| 16 | * |
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| 17 | ****************************************************************************** |
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| 18 | */ |
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| 19 | #if defined(USE_FULL_LL_DRIVER) |
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| 20 | |||
| 21 | /* Includes ------------------------------------------------------------------*/ |
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| 22 | #include "stm32l1xx_ll_exti.h" |
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| 23 | #ifdef USE_FULL_ASSERT |
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| 24 | #include "stm32_assert.h" |
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| 25 | #else |
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| 26 | #define assert_param(expr) ((void)0U) |
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| 27 | #endif |
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| 28 | |||
| 29 | /** @addtogroup STM32L1xx_LL_Driver |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | |||
| 33 | #if defined (EXTI) |
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| 34 | |||
| 35 | /** @defgroup EXTI_LL EXTI |
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| 36 | * @{ |
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| 37 | */ |
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| 38 | |||
| 39 | /* Private types -------------------------------------------------------------*/ |
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| 40 | /* Private variables ---------------------------------------------------------*/ |
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| 41 | /* Private constants ---------------------------------------------------------*/ |
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| 42 | /* Private macros ------------------------------------------------------------*/ |
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| 43 | /** @addtogroup EXTI_LL_Private_Macros |
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| 44 | * @{ |
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| 45 | */ |
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| 46 | |||
| 47 | #define IS_LL_EXTI_LINE_0_31(__VALUE__) (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U) |
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| 48 | |||
| 49 | #define IS_LL_EXTI_MODE(__VALUE__) (((__VALUE__) == LL_EXTI_MODE_IT) \ |
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| 50 | || ((__VALUE__) == LL_EXTI_MODE_EVENT) \ |
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| 51 | || ((__VALUE__) == LL_EXTI_MODE_IT_EVENT)) |
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| 52 | |||
| 53 | |||
| 54 | #define IS_LL_EXTI_TRIGGER(__VALUE__) (((__VALUE__) == LL_EXTI_TRIGGER_NONE) \ |
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| 55 | || ((__VALUE__) == LL_EXTI_TRIGGER_RISING) \ |
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| 56 | || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING) \ |
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| 57 | || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING)) |
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| 58 | |||
| 59 | /** |
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| 60 | * @} |
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| 61 | */ |
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| 62 | |||
| 63 | /* Private function prototypes -----------------------------------------------*/ |
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| 64 | |||
| 65 | /* Exported functions --------------------------------------------------------*/ |
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| 66 | /** @addtogroup EXTI_LL_Exported_Functions |
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| 67 | * @{ |
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| 68 | */ |
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| 69 | |||
| 70 | /** @addtogroup EXTI_LL_EF_Init |
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| 71 | * @{ |
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| 72 | */ |
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| 73 | |||
| 74 | /** |
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| 75 | * @brief De-initialize the EXTI registers to their default reset values. |
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| 76 | * @retval An ErrorStatus enumeration value: |
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| 77 | * - SUCCESS: EXTI registers are de-initialized |
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| 78 | * - ERROR: not applicable |
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| 79 | */ |
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| 80 | uint32_t LL_EXTI_DeInit(void) |
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| 81 | { |
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| 82 | /* Interrupt mask register set to default reset values */ |
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| 83 | LL_EXTI_WriteReg(IMR, 0x00000000U); |
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| 84 | /* Event mask register set to default reset values */ |
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| 85 | LL_EXTI_WriteReg(EMR, 0x00000000U); |
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| 86 | /* Rising Trigger selection register set to default reset values */ |
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| 87 | LL_EXTI_WriteReg(RTSR, 0x00000000U); |
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| 88 | /* Falling Trigger selection register set to default reset values */ |
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| 89 | LL_EXTI_WriteReg(FTSR, 0x00000000U); |
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| 90 | /* Software interrupt event register set to default reset values */ |
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| 91 | LL_EXTI_WriteReg(SWIER, 0x00000000U); |
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| 92 | /* Pending register clear */ |
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| 93 | LL_EXTI_WriteReg(PR, 0x00FFFFFFU); |
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| 94 | |||
| 95 | return SUCCESS; |
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| 96 | } |
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| 97 | |||
| 98 | /** |
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| 99 | * @brief Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct. |
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| 100 | * @param EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure. |
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| 101 | * @retval An ErrorStatus enumeration value: |
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| 102 | * - SUCCESS: EXTI registers are initialized |
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| 103 | * - ERROR: not applicable |
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| 104 | */ |
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| 105 | uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct) |
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| 106 | { |
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| 107 | ErrorStatus status = SUCCESS; |
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| 108 | /* Check the parameters */ |
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| 109 | assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31)); |
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| 110 | assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand)); |
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| 111 | assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode)); |
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| 112 | |||
| 113 | /* ENABLE LineCommand */ |
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| 114 | if (EXTI_InitStruct->LineCommand != DISABLE) |
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| 115 | { |
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| 116 | assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger)); |
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| 117 | |||
| 118 | /* Configure EXTI Lines in range from 0 to 31 */ |
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| 119 | if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE) |
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| 120 | { |
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| 121 | switch (EXTI_InitStruct->Mode) |
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| 122 | { |
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| 123 | case LL_EXTI_MODE_IT: |
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| 124 | /* First Disable Event on provided Lines */ |
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| 125 | LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31); |
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| 126 | /* Then Enable IT on provided Lines */ |
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| 127 | LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31); |
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| 128 | break; |
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| 129 | case LL_EXTI_MODE_EVENT: |
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| 130 | /* First Disable IT on provided Lines */ |
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| 131 | LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31); |
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| 132 | /* Then Enable Event on provided Lines */ |
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| 133 | LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31); |
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| 134 | break; |
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| 135 | case LL_EXTI_MODE_IT_EVENT: |
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| 136 | /* Directly Enable IT & Event on provided Lines */ |
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| 137 | LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31); |
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| 138 | LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31); |
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| 139 | break; |
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| 140 | default: |
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| 141 | status = ERROR; |
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| 142 | break; |
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| 143 | } |
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| 144 | if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE) |
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| 145 | { |
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| 146 | switch (EXTI_InitStruct->Trigger) |
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| 147 | { |
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| 148 | case LL_EXTI_TRIGGER_RISING: |
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| 149 | /* First Disable Falling Trigger on provided Lines */ |
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| 150 | LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31); |
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| 151 | /* Then Enable Rising Trigger on provided Lines */ |
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| 152 | LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31); |
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| 153 | break; |
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| 154 | case LL_EXTI_TRIGGER_FALLING: |
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| 155 | /* First Disable Rising Trigger on provided Lines */ |
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| 156 | LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31); |
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| 157 | /* Then Enable Falling Trigger on provided Lines */ |
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| 158 | LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31); |
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| 159 | break; |
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| 160 | case LL_EXTI_TRIGGER_RISING_FALLING: |
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| 161 | LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31); |
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| 162 | LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31); |
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| 163 | break; |
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| 164 | default: |
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| 165 | status = ERROR; |
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| 166 | break; |
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| 167 | } |
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| 168 | } |
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| 169 | } |
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| 170 | } |
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| 171 | /* DISABLE LineCommand */ |
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| 172 | else |
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| 173 | { |
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| 174 | /* De-configure EXTI Lines in range from 0 to 31 */ |
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| 175 | LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31); |
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| 176 | LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31); |
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| 177 | } |
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| 178 | return status; |
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| 179 | } |
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| 180 | |||
| 181 | /** |
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| 182 | * @brief Set each @ref LL_EXTI_InitTypeDef field to default value. |
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| 183 | * @param EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure. |
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| 184 | * @retval None |
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| 185 | */ |
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| 186 | void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct) |
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| 187 | { |
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| 188 | EXTI_InitStruct->Line_0_31 = LL_EXTI_LINE_NONE; |
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| 189 | EXTI_InitStruct->LineCommand = DISABLE; |
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| 190 | EXTI_InitStruct->Mode = LL_EXTI_MODE_IT; |
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| 191 | EXTI_InitStruct->Trigger = LL_EXTI_TRIGGER_FALLING; |
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| 192 | } |
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| 193 | |||
| 194 | /** |
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| 195 | * @} |
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| 196 | */ |
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| 197 | |||
| 198 | /** |
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| 199 | * @} |
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| 200 | */ |
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| 201 | |||
| 202 | /** |
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| 203 | * @} |
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| 204 | */ |
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| 205 | |||
| 206 | #endif /* defined (EXTI) */ |
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| 207 | |||
| 208 | /** |
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| 209 | * @} |
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| 210 | */ |
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| 211 | |||
| 212 | #endif /* USE_FULL_LL_DRIVER */ |
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| 213 | |||
| 214 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |