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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_ll_exti.c @ 752:4f19336a3f21

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Dev Bugfix: Alignment problem in lifedata structure: Since the introduction of the 64 bit DigO2 sensor ID the potential risk of a misalignment is present in the lifedata structure. E.g. If a new 8bit variable is added in front of the data structure containing the 64bit value. To avoid this in future the sensor data structure which may contain the 64bit value has been moved to the top of the structure (first element)
author Ideenmodellierer
date Tue, 07 Mar 2023 19:51:30 +0100
parents c78bcbd5deda
children
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1 /**
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2 ******************************************************************************
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3 * @file stm32f4xx_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>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
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10 *
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11 * Redistribution and use in source and binary forms, with or without modification,
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12 * are permitted provided that the following conditions are met:
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13 * 1. Redistributions of source code must retain the above copyright notice,
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14 * this list of conditions and the following disclaimer.
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15 * 2. Redistributions in binary form must reproduce the above copyright notice,
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16 * this list of conditions and the following disclaimer in the documentation
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17 * and/or other materials provided with the distribution.
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18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
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19 * may be used to endorse or promote products derived from this software
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20 * without specific prior written permission.
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21 *
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22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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32 *
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33 ******************************************************************************
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34 */
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35 #if defined(USE_FULL_LL_DRIVER)
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36
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37 /* Includes ------------------------------------------------------------------*/
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38 #include "stm32f4xx_ll_exti.h"
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39 #ifdef USE_FULL_ASSERT
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40 #include "stm32_assert.h"
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41 #else
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42 #define assert_param(expr) ((void)0U)
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43 #endif
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44
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45 /** @addtogroup STM32F4xx_LL_Driver
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46 * @{
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47 */
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48
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49 #if defined (EXTI)
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50
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51 /** @defgroup EXTI_LL EXTI
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52 * @{
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53 */
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54
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55 /* Private types -------------------------------------------------------------*/
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56 /* Private variables ---------------------------------------------------------*/
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57 /* Private constants ---------------------------------------------------------*/
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58 /* Private macros ------------------------------------------------------------*/
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59 /** @addtogroup EXTI_LL_Private_Macros
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60 * @{
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61 */
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62
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63 #define IS_LL_EXTI_LINE_0_31(__VALUE__) (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U)
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64
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65 #define IS_LL_EXTI_MODE(__VALUE__) (((__VALUE__) == LL_EXTI_MODE_IT) \
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66 || ((__VALUE__) == LL_EXTI_MODE_EVENT) \
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67 || ((__VALUE__) == LL_EXTI_MODE_IT_EVENT))
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68
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69
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70 #define IS_LL_EXTI_TRIGGER(__VALUE__) (((__VALUE__) == LL_EXTI_TRIGGER_NONE) \
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71 || ((__VALUE__) == LL_EXTI_TRIGGER_RISING) \
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72 || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING) \
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73 || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING))
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74
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75 /**
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76 * @}
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77 */
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78
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79 /* Private function prototypes -----------------------------------------------*/
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80
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81 /* Exported functions --------------------------------------------------------*/
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82 /** @addtogroup EXTI_LL_Exported_Functions
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83 * @{
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84 */
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85
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86 /** @addtogroup EXTI_LL_EF_Init
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87 * @{
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88 */
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89
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90 /**
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91 * @brief De-initialize the EXTI registers to their default reset values.
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92 * @retval An ErrorStatus enumeration value:
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93 * - SUCCESS: EXTI registers are de-initialized
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94 * - ERROR: not applicable
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95 */
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96 uint32_t LL_EXTI_DeInit(void)
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97 {
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98 /* Interrupt mask register set to default reset values */
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99 LL_EXTI_WriteReg(IMR, 0x00000000U);
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100 /* Event mask register set to default reset values */
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101 LL_EXTI_WriteReg(EMR, 0x00000000U);
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102 /* Rising Trigger selection register set to default reset values */
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103 LL_EXTI_WriteReg(RTSR, 0x00000000U);
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104 /* Falling Trigger selection register set to default reset values */
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105 LL_EXTI_WriteReg(FTSR, 0x00000000U);
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106 /* Software interrupt event register set to default reset values */
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107 LL_EXTI_WriteReg(SWIER, 0x00000000U);
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108 /* Pending register set to default reset values */
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109 LL_EXTI_WriteReg(PR, 0x00FFFFFFU);
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110
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111 return SUCCESS;
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112 }
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113
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114 /**
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115 * @brief Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct.
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116 * @param EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure.
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117 * @retval An ErrorStatus enumeration value:
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118 * - SUCCESS: EXTI registers are initialized
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119 * - ERROR: not applicable
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120 */
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121 uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct)
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122 {
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123 ErrorStatus status = SUCCESS;
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124 /* Check the parameters */
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125 assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31));
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126 assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand));
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127 assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode));
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128
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129 /* ENABLE LineCommand */
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130 if (EXTI_InitStruct->LineCommand != DISABLE)
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131 {
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132 assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger));
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133
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134 /* Configure EXTI Lines in range from 0 to 31 */
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135 if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE)
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136 {
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137 switch (EXTI_InitStruct->Mode)
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138 {
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139 case LL_EXTI_MODE_IT:
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140 /* First Disable Event on provided Lines */
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141 LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
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142 /* Then Enable IT on provided Lines */
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143 LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
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144 break;
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145 case LL_EXTI_MODE_EVENT:
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146 /* First Disable IT on provided Lines */
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147 LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
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148 /* Then Enable Event on provided Lines */
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149 LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
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150 break;
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151 case LL_EXTI_MODE_IT_EVENT:
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152 /* Directly Enable IT & Event on provided Lines */
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153 LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31);
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154 LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31);
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155 break;
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156 default:
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157 status = ERROR;
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158 break;
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159 }
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160 if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE)
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161 {
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162 switch (EXTI_InitStruct->Trigger)
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163 {
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164 case LL_EXTI_TRIGGER_RISING:
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165 /* First Disable Falling Trigger on provided Lines */
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166 LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
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167 /* Then Enable Rising Trigger on provided Lines */
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168 LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
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169 break;
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170 case LL_EXTI_TRIGGER_FALLING:
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171 /* First Disable Rising Trigger on provided Lines */
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172 LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
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173 /* Then Enable Falling Trigger on provided Lines */
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174 LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
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175 break;
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176 case LL_EXTI_TRIGGER_RISING_FALLING:
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177 LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31);
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178 LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31);
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179 break;
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180 default:
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181 status = ERROR;
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182 break;
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183 }
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184 }
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185 }
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186 }
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187 /* DISABLE LineCommand */
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188 else
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189 {
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190 /* De-configure EXTI Lines in range from 0 to 31 */
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191 LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31);
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192 LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31);
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193 }
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194 return status;
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195 }
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196
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197 /**
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198 * @brief Set each @ref LL_EXTI_InitTypeDef field to default value.
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199 * @param EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure.
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200 * @retval None
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201 */
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202 void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct)
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203 {
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204 EXTI_InitStruct->Line_0_31 = LL_EXTI_LINE_NONE;
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205 EXTI_InitStruct->LineCommand = DISABLE;
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206 EXTI_InitStruct->Mode = LL_EXTI_MODE_IT;
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207 EXTI_InitStruct->Trigger = LL_EXTI_TRIGGER_FALLING;
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208 }
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209
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210 /**
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211 * @}
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212 */
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213
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214 /**
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215 * @}
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216 */
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217
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218 /**
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219 * @}
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220 */
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221
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222 #endif /* defined (EXTI) */
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223
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224 /**
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225 * @}
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226 */
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227
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228 #endif /* USE_FULL_LL_DRIVER */
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229
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230 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/