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| Rev | Author | Line No. | Line |
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| 2 | mjames | 1 | /** |
| 2 | ****************************************************************************** |
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| 3 | * @file stm32f1xx_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) 2016 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 | |||
| 20 | #if defined(USE_FULL_LL_DRIVER) |
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| 21 | |||
| 22 | /* Includes ------------------------------------------------------------------*/ |
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| 23 | #include "stm32f1xx_ll_exti.h" |
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| 24 | #ifdef USE_FULL_ASSERT |
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| 25 | #include "stm32_assert.h" |
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| 26 | #else |
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| 27 | #define assert_param(expr) ((void)0U) |
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| 28 | #endif |
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| 29 | |||
| 30 | /** @addtogroup STM32F1xx_LL_Driver |
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| 31 | * @{ |
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| 32 | */ |
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| 33 | |||
| 34 | #if defined (EXTI) |
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| 35 | |||
| 36 | /** @defgroup EXTI_LL EXTI |
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| 37 | * @{ |
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| 38 | */ |
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| 39 | |||
| 40 | /* Private types -------------------------------------------------------------*/ |
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| 41 | /* Private variables ---------------------------------------------------------*/ |
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| 42 | /* Private constants ---------------------------------------------------------*/ |
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| 43 | /* Private macros ------------------------------------------------------------*/ |
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| 44 | /** @addtogroup EXTI_LL_Private_Macros |
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| 45 | * @{ |
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| 46 | */ |
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| 47 | |||
| 48 | #define IS_LL_EXTI_LINE_0_31(__VALUE__) (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U) |
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| 49 | |||
| 50 | #define IS_LL_EXTI_MODE(__VALUE__) (((__VALUE__) == LL_EXTI_MODE_IT) \ |
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| 51 | || ((__VALUE__) == LL_EXTI_MODE_EVENT) \ |
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| 52 | || ((__VALUE__) == LL_EXTI_MODE_IT_EVENT)) |
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| 53 | |||
| 54 | |||
| 55 | #define IS_LL_EXTI_TRIGGER(__VALUE__) (((__VALUE__) == LL_EXTI_TRIGGER_NONE) \ |
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| 56 | || ((__VALUE__) == LL_EXTI_TRIGGER_RISING) \ |
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| 57 | || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING) \ |
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| 58 | || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING)) |
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| 59 | |||
| 60 | /** |
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| 61 | * @} |
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| 62 | */ |
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| 63 | |||
| 64 | /* Private function prototypes -----------------------------------------------*/ |
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| 65 | |||
| 66 | /* Exported functions --------------------------------------------------------*/ |
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| 67 | /** @addtogroup EXTI_LL_Exported_Functions |
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| 68 | * @{ |
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| 69 | */ |
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| 70 | |||
| 71 | /** @addtogroup EXTI_LL_EF_Init |
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| 72 | * @{ |
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| 73 | */ |
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| 74 | |||
| 75 | /** |
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| 76 | * @brief De-initialize the EXTI registers to their default reset values. |
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| 77 | * @retval An ErrorStatus enumeration value: |
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| 78 | * - SUCCESS: EXTI registers are de-initialized |
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| 79 | * - ERROR: not applicable |
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| 80 | */ |
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| 81 | uint32_t LL_EXTI_DeInit(void) |
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| 82 | { |
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| 83 | /* Interrupt mask register set to default reset values */ |
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| 84 | LL_EXTI_WriteReg(IMR, 0x00000000U); |
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| 85 | /* Event mask register set to default reset values */ |
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| 86 | LL_EXTI_WriteReg(EMR, 0x00000000U); |
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| 87 | /* Rising Trigger selection register set to default reset values */ |
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| 88 | LL_EXTI_WriteReg(RTSR, 0x00000000U); |
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| 89 | /* Falling Trigger selection register set to default reset values */ |
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| 90 | LL_EXTI_WriteReg(FTSR, 0x00000000U); |
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| 91 | /* Software interrupt event register set to default reset values */ |
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| 92 | LL_EXTI_WriteReg(SWIER, 0x00000000U); |
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| 93 | /* Pending register clear */ |
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| 94 | LL_EXTI_WriteReg(PR, 0x000FFFFFU); |
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| 95 | |||
| 96 | return SUCCESS; |
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| 97 | } |
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| 98 | |||
| 99 | /** |
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| 100 | * @brief Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct. |
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| 101 | * @param EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure. |
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| 102 | * @retval An ErrorStatus enumeration value: |
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| 103 | * - SUCCESS: EXTI registers are initialized |
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| 104 | * - ERROR: not applicable |
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| 105 | */ |
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| 106 | uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct) |
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| 107 | { |
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| 108 | ErrorStatus status = SUCCESS; |
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| 109 | /* Check the parameters */ |
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| 110 | assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31)); |
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| 111 | assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand)); |
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| 112 | assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode)); |
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| 113 | |||
| 114 | /* ENABLE LineCommand */ |
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| 115 | if (EXTI_InitStruct->LineCommand != DISABLE) |
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| 116 | { |
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| 117 | assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger)); |
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| 118 | |||
| 119 | /* Configure EXTI Lines in range from 0 to 31 */ |
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| 120 | if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE) |
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| 121 | { |
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| 122 | switch (EXTI_InitStruct->Mode) |
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| 123 | { |
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| 124 | case LL_EXTI_MODE_IT: |
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| 125 | /* First Disable Event on provided Lines */ |
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| 126 | LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31); |
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| 127 | /* Then Enable IT on provided Lines */ |
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| 128 | LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31); |
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| 129 | break; |
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| 130 | case LL_EXTI_MODE_EVENT: |
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| 131 | /* First Disable IT on provided Lines */ |
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| 132 | LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31); |
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| 133 | /* Then Enable Event on provided Lines */ |
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| 134 | LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31); |
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| 135 | break; |
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| 136 | case LL_EXTI_MODE_IT_EVENT: |
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| 137 | /* Directly Enable IT & Event on provided Lines */ |
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| 138 | LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31); |
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| 139 | LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31); |
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| 140 | break; |
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| 141 | default: |
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| 142 | status = ERROR; |
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| 143 | break; |
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| 144 | } |
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| 145 | if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE) |
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| 146 | { |
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| 147 | switch (EXTI_InitStruct->Trigger) |
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| 148 | { |
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| 149 | case LL_EXTI_TRIGGER_RISING: |
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| 150 | /* First Disable Falling Trigger on provided Lines */ |
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| 151 | LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31); |
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| 152 | /* Then Enable Rising Trigger on provided Lines */ |
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| 153 | LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31); |
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| 154 | break; |
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| 155 | case LL_EXTI_TRIGGER_FALLING: |
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| 156 | /* First Disable Rising Trigger on provided Lines */ |
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| 157 | LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31); |
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| 158 | /* Then Enable Falling Trigger on provided Lines */ |
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| 159 | LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31); |
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| 160 | break; |
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| 161 | case LL_EXTI_TRIGGER_RISING_FALLING: |
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| 162 | LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31); |
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| 163 | LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31); |
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| 164 | break; |
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| 165 | default: |
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| 166 | status = ERROR; |
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| 167 | break; |
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| 168 | } |
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| 169 | } |
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| 170 | } |
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| 171 | } |
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| 172 | /* DISABLE LineCommand */ |
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| 173 | else |
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| 174 | { |
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| 175 | /* De-configure EXTI Lines in range from 0 to 31 */ |
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| 176 | LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31); |
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| 177 | LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31); |
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| 178 | } |
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| 179 | return status; |
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| 180 | } |
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| 181 | |||
| 182 | /** |
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| 183 | * @brief Set each @ref LL_EXTI_InitTypeDef field to default value. |
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| 184 | * @param EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure. |
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| 185 | * @retval None |
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| 186 | */ |
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| 187 | void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct) |
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| 188 | { |
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| 189 | EXTI_InitStruct->Line_0_31 = LL_EXTI_LINE_NONE; |
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| 190 | EXTI_InitStruct->LineCommand = DISABLE; |
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| 191 | EXTI_InitStruct->Mode = LL_EXTI_MODE_IT; |
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| 192 | EXTI_InitStruct->Trigger = LL_EXTI_TRIGGER_FALLING; |
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| 193 | } |
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| 194 | |||
| 195 | /** |
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| 196 | * @} |
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| 197 | */ |
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| 198 | |||
| 199 | /** |
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| 200 | * @} |
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| 201 | */ |
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| 202 | |||
| 203 | /** |
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| 204 | * @} |
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| 205 | */ |
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| 206 | |||
| 207 | #endif /* defined (EXTI) */ |
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| 208 | |||
| 209 | /** |
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| 210 | * @} |
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| 211 | */ |
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| 212 | |||
| 213 | #endif /* USE_FULL_LL_DRIVER */ |
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| 214 | |||
| 215 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |