annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_ll_exti.c @ 334:143fe85f82a2 v1.5.0 release

building a 1.5
author heinrichsweikamp
date Sun, 04 Aug 2019 11:01:06 +0200
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****/