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annotate Common/Drivers/STM32F4xx_HAL_Driver/Inc/stm32f4xx_ll_iwdg.h @ 422:b67327177159 ImprovmentNVM_2

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Moved Timeout handling out of 100ms callback: Handling of the timeout is not timecritical and may be done in the main loop. This was needed because writing of flash data shall be done before going to sleep. Having this function in the timer callback would raise the risk of flash inconsitencies due to parallel calls out of the main loop => Created a separate function containing the old timeout detection functionality
author ideenmodellierer
date Mon, 10 Feb 2020 19:29:12 +0100
parents c78bcbd5deda
children
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1 /**
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2 ******************************************************************************
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3 * @file stm32f4xx_ll_iwdg.h
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4 * @author MCD Application Team
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5 * @brief Header file of IWDG LL module.
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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
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36 /* Define to prevent recursive inclusion -------------------------------------*/
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37 #ifndef __STM32F4xx_LL_IWDG_H
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38 #define __STM32F4xx_LL_IWDG_H
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39
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40 #ifdef __cplusplus
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41 extern "C" {
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42 #endif
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43
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44 /* Includes ------------------------------------------------------------------*/
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45 #include "stm32f4xx.h"
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46
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47 /** @addtogroup STM32F4xx_LL_Driver
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48 * @{
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49 */
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50
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51 #if defined(IWDG)
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52
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53 /** @defgroup IWDG_LL IWDG
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54 * @{
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55 */
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56
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57 /* Private types -------------------------------------------------------------*/
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58 /* Private variables ---------------------------------------------------------*/
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59
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60 /* Private constants ---------------------------------------------------------*/
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61 /** @defgroup IWDG_LL_Private_Constants IWDG Private Constants
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62 * @{
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63 */
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64
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65 #define LL_IWDG_KEY_RELOAD 0x0000AAAAU /*!< IWDG Reload Counter Enable */
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66 #define LL_IWDG_KEY_ENABLE 0x0000CCCCU /*!< IWDG Peripheral Enable */
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67 #define LL_IWDG_KEY_WR_ACCESS_ENABLE 0x00005555U /*!< IWDG KR Write Access Enable */
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68 #define LL_IWDG_KEY_WR_ACCESS_DISABLE 0x00000000U /*!< IWDG KR Write Access Disable */
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69
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70 /**
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71 * @}
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72 */
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73
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74 /* Private macros ------------------------------------------------------------*/
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75
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76 /* Exported types ------------------------------------------------------------*/
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77 /* Exported constants --------------------------------------------------------*/
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78 /** @defgroup IWDG_LL_Exported_Constants IWDG Exported Constants
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79 * @{
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80 */
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81
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82 /** @defgroup IWDG_LL_EC_GET_FLAG Get Flags Defines
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83 * @brief Flags defines which can be used with LL_IWDG_ReadReg function
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84 * @{
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85 */
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86 #define LL_IWDG_SR_PVU IWDG_SR_PVU /*!< Watchdog prescaler value update */
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87 #define LL_IWDG_SR_RVU IWDG_SR_RVU /*!< Watchdog counter reload value update */
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88
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89 /**
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90 * @}
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91 */
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92
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93 /** @defgroup IWDG_LL_EC_PRESCALER Prescaler Divider
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94 * @{
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95 */
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96 #define LL_IWDG_PRESCALER_4 0x00000000U /*!< Divider by 4 */
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97 #define LL_IWDG_PRESCALER_8 (IWDG_PR_PR_0) /*!< Divider by 8 */
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98 #define LL_IWDG_PRESCALER_16 (IWDG_PR_PR_1) /*!< Divider by 16 */
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99 #define LL_IWDG_PRESCALER_32 (IWDG_PR_PR_1 | IWDG_PR_PR_0) /*!< Divider by 32 */
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100 #define LL_IWDG_PRESCALER_64 (IWDG_PR_PR_2) /*!< Divider by 64 */
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101 #define LL_IWDG_PRESCALER_128 (IWDG_PR_PR_2 | IWDG_PR_PR_0) /*!< Divider by 128 */
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102 #define LL_IWDG_PRESCALER_256 (IWDG_PR_PR_2 | IWDG_PR_PR_1) /*!< Divider by 256 */
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103 /**
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104 * @}
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105 */
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106
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107 /**
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108 * @}
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109 */
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110
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111 /* Exported macro ------------------------------------------------------------*/
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112 /** @defgroup IWDG_LL_Exported_Macros IWDG Exported Macros
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113 * @{
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114 */
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115
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116 /** @defgroup IWDG_LL_EM_WRITE_READ Common Write and read registers Macros
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117 * @{
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118 */
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119
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120 /**
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121 * @brief Write a value in IWDG register
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122 * @param __INSTANCE__ IWDG Instance
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123 * @param __REG__ Register to be written
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124 * @param __VALUE__ Value to be written in the register
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125 * @retval None
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126 */
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127 #define LL_IWDG_WriteReg(__INSTANCE__, __REG__, __VALUE__) WRITE_REG(__INSTANCE__->__REG__, (__VALUE__))
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128
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129 /**
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130 * @brief Read a value in IWDG register
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131 * @param __INSTANCE__ IWDG Instance
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132 * @param __REG__ Register to be read
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133 * @retval Register value
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134 */
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135 #define LL_IWDG_ReadReg(__INSTANCE__, __REG__) READ_REG(__INSTANCE__->__REG__)
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136 /**
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137 * @}
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138 */
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139
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140 /**
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141 * @}
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142 */
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143
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144
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145 /* Exported functions --------------------------------------------------------*/
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146 /** @defgroup IWDG_LL_Exported_Functions IWDG Exported Functions
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147 * @{
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148 */
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149 /** @defgroup IWDG_LL_EF_Configuration Configuration
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150 * @{
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151 */
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152
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153 /**
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154 * @brief Start the Independent Watchdog
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155 * @note Except if the hardware watchdog option is selected
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156 * @rmtoll KR KEY LL_IWDG_Enable
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157 * @param IWDGx IWDG Instance
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158 * @retval None
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159 */
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160 __STATIC_INLINE void LL_IWDG_Enable(IWDG_TypeDef *IWDGx)
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161 {
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162 WRITE_REG(IWDG->KR, LL_IWDG_KEY_ENABLE);
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163 }
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164
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165 /**
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166 * @brief Reloads IWDG counter with value defined in the reload register
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167 * @rmtoll KR KEY LL_IWDG_ReloadCounter
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168 * @param IWDGx IWDG Instance
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169 * @retval None
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170 */
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171 __STATIC_INLINE void LL_IWDG_ReloadCounter(IWDG_TypeDef *IWDGx)
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172 {
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173 WRITE_REG(IWDG->KR, LL_IWDG_KEY_RELOAD);
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174 }
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175
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176 /**
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177 * @brief Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers
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178 * @rmtoll KR KEY LL_IWDG_EnableWriteAccess
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179 * @param IWDGx IWDG Instance
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180 * @retval None
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181 */
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182 __STATIC_INLINE void LL_IWDG_EnableWriteAccess(IWDG_TypeDef *IWDGx)
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183 {
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184 WRITE_REG(IWDG->KR, LL_IWDG_KEY_WR_ACCESS_ENABLE);
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185 }
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186
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187 /**
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188 * @brief Disable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers
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189 * @rmtoll KR KEY LL_IWDG_DisableWriteAccess
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190 * @param IWDGx IWDG Instance
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191 * @retval None
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192 */
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193 __STATIC_INLINE void LL_IWDG_DisableWriteAccess(IWDG_TypeDef *IWDGx)
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194 {
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195 WRITE_REG(IWDG->KR, LL_IWDG_KEY_WR_ACCESS_DISABLE);
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196 }
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197
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198 /**
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199 * @brief Select the prescaler of the IWDG
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200 * @rmtoll PR PR LL_IWDG_SetPrescaler
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201 * @param IWDGx IWDG Instance
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202 * @param Prescaler This parameter can be one of the following values:
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203 * @arg @ref LL_IWDG_PRESCALER_4
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204 * @arg @ref LL_IWDG_PRESCALER_8
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205 * @arg @ref LL_IWDG_PRESCALER_16
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206 * @arg @ref LL_IWDG_PRESCALER_32
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207 * @arg @ref LL_IWDG_PRESCALER_64
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208 * @arg @ref LL_IWDG_PRESCALER_128
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209 * @arg @ref LL_IWDG_PRESCALER_256
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210 * @retval None
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211 */
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212 __STATIC_INLINE void LL_IWDG_SetPrescaler(IWDG_TypeDef *IWDGx, uint32_t Prescaler)
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213 {
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214 WRITE_REG(IWDGx->PR, IWDG_PR_PR & Prescaler);
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215 }
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216
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217 /**
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218 * @brief Get the selected prescaler of the IWDG
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219 * @rmtoll PR PR LL_IWDG_GetPrescaler
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220 * @param IWDGx IWDG Instance
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221 * @retval Returned value can be one of the following values:
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222 * @arg @ref LL_IWDG_PRESCALER_4
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223 * @arg @ref LL_IWDG_PRESCALER_8
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224 * @arg @ref LL_IWDG_PRESCALER_16
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225 * @arg @ref LL_IWDG_PRESCALER_32
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226 * @arg @ref LL_IWDG_PRESCALER_64
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227 * @arg @ref LL_IWDG_PRESCALER_128
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228 * @arg @ref LL_IWDG_PRESCALER_256
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229 */
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230 __STATIC_INLINE uint32_t LL_IWDG_GetPrescaler(IWDG_TypeDef *IWDGx)
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231 {
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232 return (uint32_t)(READ_REG(IWDGx->PR));
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233 }
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234
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235 /**
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236 * @brief Specify the IWDG down-counter reload value
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237 * @rmtoll RLR RL LL_IWDG_SetReloadCounter
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238 * @param IWDGx IWDG Instance
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239 * @param Counter Value between Min_Data=0 and Max_Data=0x0FFF
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240 * @retval None
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241 */
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242 __STATIC_INLINE void LL_IWDG_SetReloadCounter(IWDG_TypeDef *IWDGx, uint32_t Counter)
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243 {
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244 WRITE_REG(IWDGx->RLR, IWDG_RLR_RL & Counter);
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245 }
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246
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247 /**
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248 * @brief Get the specified IWDG down-counter reload value
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249 * @rmtoll RLR RL LL_IWDG_GetReloadCounter
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250 * @param IWDGx IWDG Instance
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251 * @retval Value between Min_Data=0 and Max_Data=0x0FFF
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252 */
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253 __STATIC_INLINE uint32_t LL_IWDG_GetReloadCounter(IWDG_TypeDef *IWDGx)
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254 {
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255 return (uint32_t)(READ_REG(IWDGx->RLR));
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256 }
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257
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258
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259 /**
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260 * @}
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261 */
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262
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263 /** @defgroup IWDG_LL_EF_FLAG_Management FLAG_Management
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264 * @{
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265 */
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266
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267 /**
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268 * @brief Check if flag Prescaler Value Update is set or not
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269 * @rmtoll SR PVU LL_IWDG_IsActiveFlag_PVU
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270 * @param IWDGx IWDG Instance
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271 * @retval State of bit (1 or 0).
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272 */
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273 __STATIC_INLINE uint32_t LL_IWDG_IsActiveFlag_PVU(IWDG_TypeDef *IWDGx)
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274 {
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275 return (READ_BIT(IWDGx->SR, IWDG_SR_PVU) == (IWDG_SR_PVU));
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276 }
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277
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278 /**
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279 * @brief Check if flag Reload Value Update is set or not
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280 * @rmtoll SR RVU LL_IWDG_IsActiveFlag_RVU
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281 * @param IWDGx IWDG Instance
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282 * @retval State of bit (1 or 0).
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283 */
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284 __STATIC_INLINE uint32_t LL_IWDG_IsActiveFlag_RVU(IWDG_TypeDef *IWDGx)
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285 {
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286 return (READ_BIT(IWDGx->SR, IWDG_SR_RVU) == (IWDG_SR_RVU));
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287 }
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288
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289
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290 /**
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291 * @brief Check if all flags Prescaler, Reload & Window Value Update are reset or not
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292 * @rmtoll SR PVU LL_IWDG_IsReady\n
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293 * SR RVU LL_IWDG_IsReady
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294 * @param IWDGx IWDG Instance
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295 * @retval State of bits (1 or 0).
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296 */
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297 __STATIC_INLINE uint32_t LL_IWDG_IsReady(IWDG_TypeDef *IWDGx)
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298 {
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299 return (READ_BIT(IWDGx->SR, IWDG_SR_PVU | IWDG_SR_RVU) == 0U);
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300 }
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301
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302 /**
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303 * @}
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304 */
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305
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306
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307 /**
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308 * @}
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309 */
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310
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311 /**
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312 * @}
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313 */
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314
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315 #endif /* IWDG) */
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316
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317 /**
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318 * @}
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319 */
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320
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321 #ifdef __cplusplus
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322 }
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323 #endif
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324
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325 #endif /* __STM32F4xx_LL_IWDG_H */
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326
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327 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/